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13-17 May 2013
Tucson, Arizona
US/Arizona timezone
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Poster Session + Reception

Place

Location: Tucson, Arizona
Address: Doubletree Reid Park 445 S. Alvernon Way Tucson, AZ 85711
Room: 0
Date: 14 May 18:00 - 21:00

Contribution List

Displaying 142 contributions out of 142
Type: Poster Presentation Session: Poster Session + Reception
The Tropical Pacific region in Colombia is the rainiest in America. Short and scarce instrumental meteorological data are a frequent drawback in South America. Tropical dendrochronology can potentially provide long-term climatic records extremely needed considering first, the lack of climatic data for feeding the global climate models for this region, and second, the high ecosystem and population ... More
Presented by Dr. Laia ANDREU-HAYLES on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
In central New York State, southeast of Lake Ontario, the relationship between summer temperature and relative humidity recorded in tree rings and their 13C isotope content indicate oscillations between a dry-cold regime and a wet-cool regime at the end of the Younger Dryas. This record corroborates with that found in boreal environments today, with the exception of frequency - the seesaw in the Y ... More
Presented by Carol GRIGGS on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
With the goal of better managing land used by the Indiana Bat (Myotis sodalis), we study both tree-level and stand-level characteristics on a mitigation property in Plainfield, Indiana. In this study we explore factors in the life of trees that might affect their quality as a roosting site (e.g. time since mortality, season of mortality, and type of mortality event such as senescence or disturban ... More
Presented by Mr. Joseph PETTIT on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
Reconstruction of past climate using standardized ring measurements enables an examination of the modern climate in the context of the last several hundred, and in some cases, thousand years. We have generated the first precipitation reconstruction for the Upper Arkansas River basin from Pinus aristata (Rocky Mountain Bristlecone Pine) at Black Mountain in central Colorado. The reconstruction, whi ... More
Presented by Kyle R. MILLER on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
Recently yew (Taxus baccata) has shown promising potential to be used in dendrochronological and dendroclimatological analysis in Ireland, western Himalaya and England. So far however, few studies on yew dendrochronology and dendroclimatology exist. The potential for obtaining long yew chronology with strong response to climatic variables are the main reasons of this research. Yew is native to Eur ... More
Presented by Ms. Beheshteh AGIN on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
Drought has significant impacts on domestic use, agriculture, and ecosystems in Tanzania and is a major seasonally occurring stress factor in water resources management. Water shortage is projected to increase with globally rising temperatures and this will likely be one of the major limitations for future development in Tanzania. Instrumental records of drought variability are sparse in Tanzania ... More
Presented by Ms. Zakia Hassan KHAMISI on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
Track: Science and decision making
Successful dissemination of scientific knowledge in a format accessible to the general public is a major contemporary concern, especially concerning issues that impact all people such as wildfire and climate change. This knowledge gap creates a divide between scientific communities and educational systems, limiting dialogue concerning viable environmental solutions. In 2012, LTRR initiated colla ... More
Presented by Mr. Joshua FARELLA on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
Previously reported dendrochemical data showed temporal variability in concentration of tungsten (W) and cobalt (Co) in tree rings of Fallon, Nevada, US. Since then, intertree variability was calculated for each measured element across trees within subsites and time periods. For W and Co, the metals of highest interest in Fallon, inter-tree variability was always higher within versus outside of Fa ... More
Presented by Dr. Paul R. SHEPPARD on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
A historic barn near Edmonton, Alberta, is thought to have contained extant timbers from Fort Edmonton, the Hudson Bay Trading Post constructed in 1795 and dismantled in 1915. When the barn was demolished a few years ago, the Alberta Royal Museum salvaged and archived these timbers. In 2012, they contracted the University of Regina Tree-Ring Lab to determine the age of the timbers, as further evid ... More
Presented by Mr. James DICKENSON on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
Studies in Europe have revealed a measurable decrease in the cell size of roots after exposure providing a useful tool for dating geomorphic events. This type of analysis has yet to be explored in North America. Exposed and buried tree roots of white spruce were sampled from sites in the Oldman River Basin in Alberta, Canada. The samples were sanded and then dated using WinDENDRO. Using a techniq ... More
Presented by Mr. Ben BRODIE
Type: Poster Presentation Session: Poster Session + Reception
A method based on a feature of wood anatomy: tree-ring eccentricity was developed to analyze the spatial and temporal variability of landslide activity. The degree of eccentricity is used as an indicator of the intensity of the mechanical stress affecting a stem in a certain year. The uneven distribution of strains in a stem of Norway spruce tilted by ground instability causes more intensive growt ... More
Presented by Ms. Małgorzata WISTUBA on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
Studies on long-term sea cliff morphology typically use historical maps, aerial photographs or Lidar data to determine cliff retreat. In this study, anatomical changes in 58 exposed roots of Pinus halpensis were used to quantify retreat of decametric sandstone cliffs on Porquerolles Island (France). At the plot scale, average medium-term soil erosion rates derived from exposed roots was 20 mm yr ... More
Presented by Dr. Christophe CORONA on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
Araucaria angustifolia is a native subtropical coniferous species of southern Brazil. Previously published 14C measurements on selected annual growth rings confirmed the overall profile of the Southern Hemisphere (SH) of the “bomb-pulse”, suggesting that using an annual resolution of this long-lived species for the construction of a calibration chronology curve was promising. This work reports ... More
Presented by Dr. Guaciara M. SANTOS on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
Dendrogeomorphology has been demonstrated to be a valuable tool for studying hydrogeomorphic processes in ungauged or poorly catchment. However, an appropriate knowledge of the response of trees to these processes is crucial for proper interpretation of dendrochronological signal. In this communication, we present results from the study of damages riparian trees (Alnus glutinosa, Fraxinus angustif ... More
Presented by Dr. Juan Antonio BALLESTEROS CANOVAS on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
In the central rainforest of Peru, the tree rings have not been used to obtain data from tree growth, although their application may be useful for forest management. The objective of this study was to determine the Biological Harvesting Rotation of Juglans neotropica from the analysis of tree-rings growth. For this purpose samples were collected from 64 trees from the forests of the Native Communi ... More
Presented by Ms. Janet Gaby INGA GUILLEN on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
The root system is often neglected in the study of the effect of commercial thinning, even though it plays a great part in the success of the treatment. The research aims to compare the growth response in the stem and roots after commercial thinning. Six black spruce (Picea mariana) stems and their root system were sampled within three commercial thinning stands in the boreal forest. Thinning occu ... More
Presented by Audrey LEMAY on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
This poster shows the study design and preliminary results of a fire history and stand dynamics study in a Great Basin bristlecone pine forest at Mount Washington, Nevada. This forest has experienced a recent high severity fire enables us to directly examine fire effects in bristlecone pine. The research plan includes mapping fire boundaries via ground mapping and remote sensing, measuring vegetat ... More
Presented by Mackenzie KILPATRICK on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
Large, old western redcedar trees provide a wide range of ecological functions and are an integral part of coastal First Nations’ culture in British Columbia. Redcedar bark is commonly removed from tree trunks and used in baskets, hats and clothing. The surviving tree forms a permanent scar that can be crossdated to determine the year of past cultural modifications. We have developed multi-cen ... More
Presented by Ashley DOBKO on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
Climate-growth association studies in a broad scale approach highlight that changes in climate may produce unique responses at different sites within a species distribution, particularly when species distribution represents the climatic tolerance of the species. Here, we explore if trees from different sites shows particular stability/unstability pattern in its sensitivity over time. Along altitud ... More
Presented by Dr. Maria Laura SUAREZ
Type: Poster Presentation Session: Poster Session + Reception
A network of 73 upper elevation white spruce chronologies was developed from treeline sites across the Yukon Territory. PCA of standard ring-width chronologies indicate a strong common growth pattern (50 sites, 57.3% of variance) loading on PC1 during the 1900-1950 period but varied patterns over the 1951-2000 interval when 22, 19 and 14 chronologies load on the first 3 PCs respectively (67.8% cu ... More
Presented by Mr. David S. MORIMOTO on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
Changes in fire frequency and climate may alter post-wildfire growth responses in trees that survive fires. Using tree ring measurements, we evaluated short and long-term basal area growth responses to recurrent 20th-century fires in old-growth ponderosa pine in north central Idaho. We also examined whether potential variability in growth response to fire was related to climate variables and time ... More
Presented by Dr. Eric KEELING
Type: Poster Presentation Session: Poster Session + Reception
Given the expected sensitivity of radial growth of trees near altitudinal treeline to global warming, we examined recent variability in growth of Nothofagus pumilio in monospecific stands near altitudinal treeline on Choshuenco Volcano (40oS latitude) in Chile. Preliminary results based on a chronology of 99 tree-ring series for the period from 1768 to 2010 yielded a mean series intercorrelation ... More
Presented by Mr. Claudio ALVAREZ on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
Documenting historical fire regimes provides an unparalleled view of ecosystem function across spatiotemporal scales. We analyzed fire-scars and tree demography in a multiscale dendrochronological study from a network of sites in central and eastern Oregon. We sampled over 6000 trees for tree-establishment dates in ponderosa pine, dry and mesic mixed conifer, and lodgepole-ponderosa pine communiti ... More
Presented by Dr. Donald FALK on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
The aim of this study is to evaluate the relationships between apical (primary) and radial (secondary) growth as well as the influences of climate variations on both apical and radial growth in a native forest of Nothofagus pumilio in the north Patagonia Andes. Ring widths and the lengths and number of internodes per annual shoot for the interval 2001-2010, were measured in 40 individuals of N. pu ... More
Presented by Mr. Amaru MAGNIN on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
With the objective to increase the network of climate-sensitive chronologies in Mexico, the dendroclimatic potential of Pinus cooperi a conifer species distributed in the western section of Durango, Mexico was analyzed. Increment cores were taken from selected trees along an altitudinal gradient (2300 to 2900 m). Increment core samples were successfully dated by standard dendrochronological techni ... More
Presented by Ms. Julián CERANO-PAREDES on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
Quercus douglasii (blue Oak) tree-ring cellulose δ18O in southern California contains a memory of the interannual variability in precipitation δ18O via soil water δ18O. Combined, soil water δ18O and cellulose δ18O provide insights into regional hydrologic variability that may be caused by distinct atmospheric dynamics. In the late 20th century, years with uniquely low cellulose δ18O are as ... More
Presented by Dr. Lisa KANNER on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
Long-term demographic datasets of tree populations improve our understanding of forest response to climatic fluctuation and change. Excellent preservation of remnant wood on the Tavaputs Plateau in northeastern Utah provides the opportunity to investigate population dynamics of Colorado pinyon (Pinus edulis), and its relation to climate variability over multiple centuries. From a sample of 597 p ... More
Presented by Dr. Troy KNIGHT on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
Non-random sampling protocols and differences in mortality between trees of different growth rates has been suggested to cause widespread, systematic bias in dendrochronological reconstructions of tree growth, a phenomenon known as modern sample bias. By making explicit the model of tree growth used in regional curve standardization, it becomes evident that tree ring data can be stored and manipul ... More
Presented by Mr. Jacob CECILE on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
Fire scars in tree rings are commonly used to reconstruct fire frequency, but reconstructing spatial variability of fire regimes can be challenging. Spatially explicit fire models provide a great new opportunity to study fire at landscape scales, but can rarely be tested against real fires. In this study, I corroborate tree-ring reconstructed and modeled conditional burn probability for a 30,000 ... More
Presented by Dr. Ellis MARGOLIS on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
Permineralized (fossilized or 'petrified') wood from many sites around the world can exhibit an incredible degree of preservation, including intact cell structure and sub-cellular features. Yet previous attempts to use traditional dendrochronology on such material have met with only limited success. Here we present the results of ring width analyses of fossil wood samples from two mid-Miocene loca ... More
Presented by William WRIGHT on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
The indigenous use of bark and cambium harvested from trees has been documented world-wide for centuries, especially in northern latitudes and in western regions of North America, including the Pacific Northwest, the Southwest, and portions of western Montana, Idaho, and Canada. However, there remain substantial portions of western North American where indigenous use of tree resources is largely u ... More
Presented by Marcy REISER on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
The Bridger Antelope Trap is an archaeological site in southwestern Wyoming that was used by American Indians while hunting antelope (Antilopcapra americana). The trap is a large corral constructed from Utah juniper (Juniperus osteosperma) covering 110,000 m2. The primary purpose of the project was to provide information about when the trap was built and used. The juniper wood contained numerous m ... More
Presented by Dr. Jim SPEER on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
A 570-year floating tree-ring-width chronology was built from samples of in situ forests and detrital logs of 27 trees from a tributary valley of Wachusett Inlet in Glacier Bay National Park and Preserve. Calibrated radiocarbon dates provide absolute ages for the ring-width series and stratigraphic analyses show that the trees were killed by a series of ice advance-related sedimentation events at ... More
Presented by Sarah APPLETON on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
Almost 100 years ago, the astronomer Andrew Ellicott Douglass of the University of Arizona received archaeological tree-ring samples from archaeologists working in northwestern New Mexico. Although it took Douglass—in collaboration with many archaeologists—another 15 years, he ultimately laid the foundation for the most accurate and precise prehistoric cultural chronology in the world. Since D ... More
Presented by Ronald TOWNER on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
Dendroarchaeology was used to interpret the history of two historic structures in the Valles Caldera National Preserve of New Mexico. Historical documents date some structures in the preserve, but a commissary cabin and a salt barn were lacking conclusive construction dates. Two tree species, Abies concolor (white fir) and Pseudotsuga menziesii (Douglas-fir), were represented by the cores extracte ... More
Presented by Kristen DE GRAAUW on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
In past dendrogeomorphological research on pines growing around the Mexican cinder cone called Parícutin, it was noticed that most of the trees sampled showed reduced ring widths from 1970 to 1974. That tree-ring signal was due not to the volcano but rather to an outbreak of an insect defoliator. Dendrochemistry was tried on selected tree-ring samples to see if the known defoliation caused chan ... More
Presented by Dr. Paul R. SHEPPARD on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
Dendrochemistry of nitrogen remains problematic. Questions persist about mobility of nitrogen compounds across already-formed tree rings such that temporal signals of ring nitrogen might not reflect environmental variability. Various strategies exist for overcoming this problem, and to test their effectiveness, this study sampled, measured, and analyzed growth rings from trees growing in coastal ... More
Presented by Dr. Paul R. SHEPPARD
Type: Poster Presentation Session: Poster Session + Reception
On July 2010, archaeologists encountered the intact remains of a ship’s hull in lower Manhattan. Because the date of construction and origin of the timbers were unknown, samples from different parts of the ship were for dendrochronological dating and provenancing. After building a floating chronology from the extracted white oak samples, absolute dating and provenance was evaluated against 21 oa ... More
Presented by Dr. Dario MARTIN-BENITO on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
The presented preliminary studies are a part of interdisciplinary project on recognition of mechanisms and effects of human influence and natural factors on the alpine ecosystems in context of continental arid climate of Central Asia. The study area is located in the Fann Mts, at the contact of the Zarafshan and the Gissar ranges, Western Pamir-Alay. Based on field reconnaissance the following spe ... More
Presented by Dr. Magdalena OPAłA on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
As a result of a favorable preservation and the ancient Egyptian practice of ritually provisioning individuals for the afterlife, hundreds of tons of wood have been recovered from archaeological excavations in Egypt. Ancient ships, coffins, furniture and architectural timbers provide a potentially robust source of material for dendrochronological investigations. As early as 1932, A.E. Douglass was ... More
Presented by Rebecca CAROLI on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
In August of 1964 a large bristlecone pine (Pinus longaeva) in the Snake Range of Nevada was cut down by Donald Currey, then a graduate student at the University of North Carolina. In the immediate aftermath of this unfortunate incident a counting of rings indicated the tree to be of record setting age: 4,844 years (later revised by D. Graybill to 4,862 years). However, these were estimates based ... More
Presented by Matthew SALZER, Chris BAISAN on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
Changing climatic conditions and volcanic activity on the Kamchatka Peninsula have triggered a large number of devastating volcanic debris flows (lahars), which have the potential to develop considerable reach and devastate populated areas. While there are complete records of the past decades for volcano eruptions around the village of Klyuchi, lahars have only been recorded when infrastructure wa ... More
Presented by Mrs. Annina SORG on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
Tangential rows of traumatic resin ducts (TRDs) are reliable indicators of injury from geomorphic disturbance in conifer species such as Pseudotsuga, Picea and Larix, but very limited research on Abies species suggests that they produce TRDs only rarely and very close to the wound. We documented the strength, tangential (%) and radial (years) extent, and position within the growth ring of TRDs in ... More
Presented by Dr. Matthew BEKKER on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
Drought stress and past management may act as potential drivers of forest decline in xeric sites of the European rear edge forests. We analyze how climatic, environmental, structural and biotic factors drive radial growth and defoliation at tree and stand levels, comparing natural and planted Pinus nigra stands in SE Spain. We use dendrochronological methods, linear mixed and structural equation m ... More
Presented by Dr. Raul SANCHEZ-SALGUERO
Type: Poster Presentation Session: Poster Session + Reception
Understanding the climatic sensitivity of multiple trees species from stand to regional scales will aid management plans on how carbon sequestration and forest composition will be altered with continued climatic change. A Network of species-diverse tree-ring records collected across the eastern seaboard via differing strategies indicate that most trees in the humid eastern US are limited by drough ... More
Presented by Neil PEDERSON
Type: Poster Presentation Session: Poster Session + Reception
This study, as part of the 22nd annual North American Dendroecological Fieldweek (NADEF), contributed to a new network of monsoon-sensitive latewood width (LW) chronologies in north-central New Mexico while also providing hands-on experience for NADEF participants to learn the fundamental skills of dendrochronology. Participants developed the first EW/LW chronology for Pinus ponderosa in the Jeme ... More
Presented by Christopher GUITERMAN on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
Glacier and treeline fluctuations in the subalpine region of the southern Coast Mountains have been reconstructed using dendroecologic methods. Glaciers in Garibaldi Provincial Park and the Pemberton Icefield allow detailed reconstructions of fluctuations during the past millennium. Glaciers advanced as early as the 11th, reached maxima in the 12th, and retreated in the 13th century. Glaciers reac ... More
Presented by Johannes KOCH on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
Since early 20th century, Glaciar Moreno’s experienced successive advances and retreats. During advances it closes the drainage of southern arms of Lago Argentino. Increases in water levels flood Nothofagus forests’ coast and subsequently kills the submerged trees. During ruptures of ice front, the stored water flows rapidly, exposing vast areas to re-colonization. Tree-rings from standing dea ... More
Presented by Ms. Claudia Marcela GUERRIDO on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
We aim to assess the dendrochronological potential of Pinus oocarpa in eastern Guatemala in semiarid areas and investigate the intra-annual meteorological phenomena that might explain the formation of intra-annual rings. These results are based on the hypothesis that P. oocarpa is producing evident annual tree-rings due to climatic seasonality. This study was located at low latitudes 14º35´ N to ... More
Presented by Mr. Paul SZEJNER on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
Track: Fire ecology
Pine forests of the Southwestern United States were characterized historically by high-frequency low-severity surface fire events evident in the tree-ring record. Twentieth century fire suppression has disrupted these fire regimes in US forests leading to recent unprecedented fire severity and behavior across the Western US. Forests of Northwestern Mexico are similar in both species composition an ... More
Presented by Mr. Alexis ARIZPE on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
In central Canada, information on fire history remains largely anecdotic and long-term reconstructions are rare. In a context where both anthropogenic and climate influences on fire regime have changed (fire suppression remaining the dominant management paradigm) the Canadian National Parks have for mandate to maintain ecological integrity. We present a fire reconstruction derived from jack pine t ... More
Presented by Prof. Jacques TARDIF on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
Track: Fire ecology
Little is known about drivers and trends of historic fire regimes in the Araucaria araucana forests of southwestern Argentina. Fire history in these forests was reconstructed by the analysis of 246 fire-scarred partial cross-sections collected at 10 sites in northern Patagonia. Fire chronologies showed an increase in fire occurrence during the nineteenth century and a sharp decrease since the earl ... More
Presented by Dr. Ignacio MUNDO on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
A network of fire-history sites is analyzed across a broad spectrum of topographic variables and vegetation types. Fire regime characteristics are defined for a variety of existing forest types, and are compared across topographic variables such as slope, aspect, and elevation. Where sampling densities are sufficient for the purpose, fire spread over complex topography is inferred.
Presented by Mr. Jesse MINOR
Type: Poster Presentation Session: Poster Session + Reception
Fire is an important process in the boreal forest. Reconstructing fire history is necessary for development of appropriate management strategies. Two approaches well suited to fire history reconstructions are analysis of tree-rings and of lake sediment-charcoal records. In this study, the fire record stored in these two proxies will be analyzed and calibrated to reconstruct recent to millennial fi ... More
Presented by Mr. Justin WAITO on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
The partial cross-section (PCS) method is a proven technique to obtain fire-scar samples while ensuring the trees survive, as long as specific perimeter and cross-sectional area thresholds are not exceeded. In this study, we examine the success of the PCS method in obtaining fire scar information from trees. Using a GIS, we digitized 230 images of full cross-sections from fire scarred western larc ... More
Presented by Gregory GREENE on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
Riverine floods have been analyzed using a variety of floodplain-based and dendrogeopmorphic approaches. This study takes a "mechanistic" weather-based approach to explore the degree to which flood events are detectable in time series of observed and reconstructed mean annual streamflow in the Salt and Verde watersheds of the Lower Colorado River Basin. Results indicate that the detectable cont ... More
Presented by Dr. Katherine HIRSCHBOECK on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
Nearly all reconstructions of the large-scale temperature history of the Common Era rely on tree-ring proxies. Estimates of past climate variability and the sensitivity of the ocean-atmosphere system to changes in solar and volcanic forcing are likewise informed by these reconstructions. In concert with ice cores proxies tree-rings provide one of the primary means for identifying the timing of ( ... More
Presented by Dr. Kevin ANCHUKAITIS on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
The precise study of the variability of winter temperature in recent centuries is critical, due to the fact that the increase in the prevalence of warm winters is regarded as clear evidence of climate warming in Poland. The study was conducted in the Silesia Region, located at the south of Poland, eastern Europe. The investigated region is particularly favorable for historical climate studies than ... More
Presented by Dr. Magdalena OPAłA on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
Tree rings are a reliable source of information for studying past climate variability. In this sense, frost events can be recorded in the annual rings of tree as frost rings. We analysed samples from five Araucaria araucana forests in northern Patagonia, Argentina and classified the position of frost damage within tree rings. A regional frost ring chronology of 700 years was developed. The most ge ... More
Presented by Mr. Martín HADAD on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
Various studies have described the application of tree rings to seismological research. While most of these studies have focused on the growth response of species adjacent to the fault, very few have examined the spatial variation of the response at a moderate distance from the disturbance. In this study, Douglas-fir (Pseudotsuga menziesii) cores were examined from four sites at a distance of up t ... More
Presented by Ms. Kayla PENDERGRASS on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
Forests at the rear edge are assumed to be sensitive to drought stress, but its response to this stressor may be contingent on local climatic conditions. We analyzed climate-growth patterns in five Pinus nigra populations located in four Spanish xeric sites and one Moroccan mesic one. Tree-ring width chronologies were built for the 20th century and related to monthly climatic variables and to a mu ... More
Presented by Dr. Raul SANCHEZ-SALGUERO
Type: Poster Presentation Session: Poster Session + Reception
This study describes the most prominent anatomical features associated with the presence of annual growth bands in eight species from the tropical Bolivian Cerrado forest: Amburana cearensis, Cedrela fissilis, Platimiscium ulei, Centrolobium microchaete, Hymenaea courbaril, Anadenanthera colubrina and Ficus boliviana. In six from the eight species, marginal parenchyma is the most common pattern de ... More
Presented by Dr. Lopez Callejas LIDIO, Dr. Villalba RICARDO on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
We present two chronologies of dead and weakened Quercus ilex trees from declining open woodlands of Southern Andalusia and discuss climate's implication in the current widespread mortality in these ecosystems. Basal area increments were used to find out periods of growth decline preceding death. Absent rings became frequent since the 1970s, coinciding with increasing drought. Negative pointer yea ... More
Presented by Dr. Reyes ALEJANO on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
Research has shown growth-climate associations for Quercus alba and Q. rubra are similar and consistent across their geographic range. Correlations between growth and early growing season water balance variables were spatially replicated, evidence for cause-effect relationships. This analysis was expanded to Q. prinus, Q. velutina, Q. macrocarpa, and Q. stellata and includes 116 sites. Correlat ... More
Presented by Dr. David LEBLANC on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
The highly waterdependent semiarid Andes of Chile and Argentina (CChA) are characterized by extremely variable annual precipitation regimes. The existing hydroclimate instrumental records from CChA provide a spatially dense network but only for the last 40-80 years. During recent decades our tree-ring studies in Austrocedrus chilensis have demonstrated the usefulness of this conifer to reconstruct ... More
Presented by Dr. Carlos LEQUESNE on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
In montane forests of Jasper National Park, Canada, 20th century land use altered fire frequency and resulted in changes to forest structure and composition that render low and high elevation forests more similar. We tested whether historical fires in Jasper included high and moderate severity fires comprising a mixed-severity fire regime. Cross-dated, annually-resolved fire-scar records were comb ... More
Presented by Raphael D CHAVARDES on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
The scientific study of tree rings – the modern field of dendrochronology – dates to the early 20th century with the pioneering research of Douglass at Arizona. Since that time, it has become a respected field, with training and research laboratories, specialized journals, diverse applications to other areas of science, scientific societies, and a worldwide network of researchers. Even though ... More
Presented by Prof. James CAPSHEW on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
Wildfire history and climate change were investigated over the middle part of the Chinese Loess Plateau. High-resolution analysis of charcoal and sediment in combination with OSL dating were carried out in a complete eolian loess-soil profile. The results indicate that wildfires occurred frequently during the last glacial through to the early Holocene under the dry climate. Wildfires were reduced ... More
Presented by Prof. Chunchang HUANG on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
Unlike other geomorphic processes, each injury recorded in trees growing on a rockfall slope will typically be considered one rockfall event. Reconstructed rockfall activity and fluctuations thereof will thus heavily depend on sample depth and the spatial distribution of sampled trees. In addition, fewer events will normally be recorded the farther one goes back in time due to decreasing sample de ... More
Presented by Mr. Daniel TRAPPMANN on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
We used dendroecological techniques to evaluate restoration efforts in a mixed conifer stand in Ponderosa State Park, Idaho. The management objectives were to restore the stand to a pre-European settlement condition. Using basal area increment (BAI), we assessed the growth responses of overstory ponderosa pine (Pinus ponderosa) and Douglas-fir (Pseudotsuga menziesii) 10 years after an understory ... More
Presented by Dr. Karen ARABAS
Type: Poster Presentation Session: Poster Session + Reception
Flood risk management decisions require the rational assessment of mitigation strategies. Here, we present a study case where tree-rings have been used for including past flood dating into a cost-benefit methodology to compare structural alternatives for flood-risk mitigation in Navaluenga (Ávila, Spain). Uncertainties have been assessed by comparing the flood frequency obtained with a hydrologic ... More
Presented by Dr. Juan Antonio BALLESTEROS CANOVAS on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
Modeling carbon uptake by terrestrial ecosystems (Gross Primary Production (GPP)) is important because plants transfer approximately 120Gt of Carbon, annually, from the atmosphere to the biosphere. This sequesters a portion of the anthropogenic carbon being released to the atmosphere. However, GPP models are inaccurate due to the difficulty of measuring all carbon within the system. Here, we in ... More
Presented by M Ross ALEXANDER on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
The summer school objectives were to sharpen and broaden the dendrochronology skills of the participants, stimulate ideas for future dendrochronological research, and foster collaboration of tree-ring researchers around the world. The course was hosted by the National Center for Environmental Education at the Valsaín Forest (Spain). The course had 14 participants from three countries (Spain, Alg ... More
Presented by Dr. Juan Antonio BALLESTEROS CANOVAS, Prof. Ramzi TOUCHAN, Mr. Dave MEKO on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
During the last Ice Age earthworms were eradicated from the Great Lakes Region. Earthworms present today are invasive, were introduced by European settlers, and have since spread via migration widespread dispersal by people. Earthworms alter the structure, composition, and nutrient cycling of forest communities. We examined how earthworm invasion effects tree growth and productivity. We sampled ea ... More
Presented by Ms. McKaylee DUQUAIN on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
Fourteen moisture sensitive tree-ring sites, (37 chronologies; annual, earlywood, and latewood) were developed to create robust multi-proxy reconstructions of annual water year and summer streamflow for four gauges within the Souris River Basin. Multiple linear regressions were able to account for ~76% and ~67% of the instrumental variance for water-year and summer flows, respectively. Spectral a ... More
Presented by Jessica VANSTONE on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
Six water emergencies have occurred since 1981 for the New York City region (NYC) despite: 1) 30 yrs of water conservation policies and 2) meteorological data showing little severe or extreme drought since 1970. We reconstruct 472 years of moisture availability to place these emergencies in long-term context. Thirty-two chronologies comprised of 12 species account for up to 66.2% of the average Ma ... More
Presented by Neil PEDERSON on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
Track: Recent growth changes and tree mortality
The current climate change involves an increase in droughts events. We analyze the impact of drought on the radial growth and vigor of two pine species (Pinus sylvestris, Pinus nigra) in a semi-arid mountain at southeastern Spain near of their rear edge limit. We used dendrochronological methods, defoliation records, linear mixed and logistic models for growth and defoliation, respectively, to qua ... More
Presented by Dr. Raul SáNCHEZ-SALGUERO on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
The 2012 Whitewater-Baldy Fire, the largest fire in New Mexico history, burned large areas in the Gila Wilderness with high burn severity. Recent, large high severity burn patches in the pine-dominated forests of the Southwest are outside of the historic range of variability, but less is known about the historic role of fire in the high elevation forests. We present tree-ring reconstructed fire ... More
Presented by Dr. Ellis MARGOLIS
Type: Poster Presentation Session: Poster Session + Reception
We collected fire scars from Ponderosa pine (Pinus ponderosa) to characterize the fire frequency and severity of a stand in the Valles Caldera National Preserve in New Mexico. We developed a master-tree chronology using Douglas- fir (Pseudotsuga menziesii) cores to cross-date fire scars to detect precise fire years. After identifying fire event years, we qualitatively assessed seasonality of fire ... More
Presented by Mrs. Christina RESTAINO on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
Fire scars are visible evidence of compartmentalization and closure processes that contribute to tree survival after fire injury. Preliminary observations of dissected fire scars from trees injured within the last decade showed centripetal development of wound-initiated discoloration (WID) through 2-3 decades of former sapwood in Larix occidentalis and Pseudotsuga menziesii. Although the WID reach ... More
Presented by Dr. Kevin T. SMITH on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
A phenomenal late Pliestocene (interglacial or interstadial) faunal assemblage has been collected from the Snowmastedon site (2270 m) in central Colorado. The assemblage contains several thousand bones from dozens of species, including many individual mammoths and mastodons. An equally impressive number of wood fossils have been collected. Many of the fossils, especially the largest logs (~40-6 ... More
Presented by Dr. Peter BROWN on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
Trees affected by mass movements record the evidence of geomorphic disturbance in their growth-ring series, thereby providing a precise geochronological tool for the reconstruction of past process activity. Identification of activity was typically based on the presence of growth anomalies in affected trees and focused on the presence of scars, tilted or buried trunks as well as on apex decapitatio ... More
Presented by Prof. Markus STOFFEL on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
Abstract There is a small but substantial literature showing mean sensitivity to be a poor statistic for describing the properties of tree-ring data. Yet, it continues to be widely used. We show in a logical and straightforward way that mean sensitivity is an inefficient estimator of the coefficient of variation and that mean sensitivity can be expressed as a function of the variance and first-ord ... More
Presented by Dr. Andrew BUNN on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
One of the latest applications of proxies related to tree-ring is the use of the image analysis of blue reflectance (BR). This study presents the analysis of BR for sixe coniferous spices which grow in Tatra Mountains, Carpathians within subalpine (Larix decidua Mill., Picea abies (L.) Karst., Pinus Cembra (L.), Pinus mugo Turra) and montane (Abies alba (L.) Karst., Pinus sylvestris (L.)) zones, c ... More
Presented by Dr. Ryszard Jerzy KACZKA, Mrs. Barbara CZAJKA on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
Wildfire is an important disturbance agent in western Canadian forests, and land management and fire exclusion strategies have made the modern record of fires unrepresentative of the natural disturbance regime resulting in apparent landscape homogenization. This research uses a multiproxy fire history approach to reconstruct wildfire history in the Alberta Foothills, a landscape believed to be cha ... More
Presented by Ms. Vanessa STRETCH on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
Track: Tree-ring network analysis
Across the Earth Sciences demand is increasing for structured data that can be shared across disciplines and used efficiently in diverse computing environments. NOAA Paleoclimatology has implemented structured templates for data and metadata across eighteen proxy/archive types, from corals to caves. Similar to the iconic ITRDB format but richer in descriptive information, the templates will faci ... More
Presented by Dr. Eugene WAHL
Type: Poster Presentation Session: Poster Session + Reception
Crown dieback is frequently observed in most Nothofagus pumilio forests located in relatively dry environments of the north Patagonian Andes. Seven stands of N. pumilio showing external evidence of crown decline were sampled to determine the relationships between radial growth patterns and crown dieback. In each stand, Principal Component Analyses were applied to ring width and basal area increme ... More
Presented by Ms. Milagros RODRIGUEZ CATóN on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
Tree rings result from the total number of woody cells formed under various positive and negative environmental influences prevailing prior to and during a growing season. That is why it is assumed that cell-anatomical variables such as lumen area or wall thickness may have ‘archived’ some environmental information. Most studies up to now were made with deciduous tree species such as oak and b ... More
Presented by Prof. Martin WILMKING on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
Our study was designed to identify the relationships between climate parameters, such as precipitation, and δ18O values of tree ring α-cellulose extracted from exactly dated tree rings of Pterocarpus angolensis growing in the arid to semiarid Mzola region of western Zimbabwe. We applied the Modified Brendel technique to isolate α-cellulose from raw wood samples extracted from two P. angolensis ... More
Presented by Ms. Kerry MCLERAN on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
We investigated relationships between climatic variability and historical wildfires in Florida Keys pine rocklands using tree-ring samples from the canopy dominant Pinus elliottii var densa (South Florida slash pine). We compared a new set of crossdated fire-scar chronologies spanning the period 1707–2010 CE to measured values of ENSO (NIÑO3.4), PDO, and regional temperature and precipitation. ... More
Presented by Dr. Grant HARLEY on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
We investigated the influence of invasive species, anthropogenic disturbance, and climate variability in two endangered high-elevation southern Appalachian Mountain forest communities. We quantified changes in the successional status and radial growth patterns of endangered red spruce (Picea rubens Sarg.), Fraser fir (Abies fraseri [Pursh] Poir.), and Carolina hemlock (Tsuga caroliniana Engelm.) f ... More
Presented by Dr. Saskia VAN DE GEVEL
Type: Poster Presentation Session: Poster Session + Reception
Despite the progress made during the past 20 years searching dendrochronological potential in tropical and subtropical tree-species, tropical dendrochronology is still in a development stage. The aim of this research was to determine the potential of Cedrella. odorata for dendrochronological studies in the Selva Central of Peru. The tree-ring anatomical characteristics were carefully examined and ... More
Presented by Ms. Manuel Jesús PEREYRA ESPINOZA, Dr. Mariano SANTOS MORALES on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
Water resources of the southwestern Canadian Prairies are limited and sensitive to changes in climate and land cover. An increasing demand for water resources has increased vulnerability to hydrological drought. Because few instrumental records exceed 100 years, climate proxies are used to extend the historical record of natural variability. Fifteen moisture sensitive tree-ring chronologies (Pi ... More
Presented by Ms. Samantha KERR on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
Tree-ring samples were collected from trees growing on the flanks of various volcanoes of the central Andes Volcanic Range, on the border of Argentina and Chile. The species sampled were Araucaria, which appear to be up to 800 years in age, and Austrocedrus, which are about 150 years in age. The Araucaria samples have extremely narrow rings for hundreds of years in a row, and strictly speaking c ... More
Presented by Dr. Paul R. SHEPPARD on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
A network of more than a thousand tree-ring chronologies across the Northern Hemisphere provides precisely dated annual resolution data on past droughts and pluvials spanning the last two thousand years (the Common Era). Hydroclimate reconstructions using these proxies consistently reveal epochs of anomalously dry and wet conditions of substantially greater magnitude and duration than those record ... More
Presented by Dr. Kevin ANCHUKAITIS on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
Quantitative data on historical forest structure (tree composition, densities, basal areas, size distributions, and spatial arrangements) are rare for Colorado Front Range forests dominated by ponderosa pine. The Front Range Forest Reconstruction Network was initiated in spring, 2012, to develop these metrics to better inform ecological restoration efforts, and to examine changes in forests and f ... More
Presented by Dr. Peter BROWN on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
The current mountain pine beetle (mpb) epidemic has killed lodgepole pines throughout their range in Colorado, including above 3077 m. Prevailing opinion suggests that mpb activity at such high elevation is unprecedented. We selected old stands above 3077 m and examined remnant wood for signs of mpb attack: visible galleries, exit holes, frass, larval galleries and pupal chambers; stems broken 13 ... More
Presented by Ms. Laurie HUCKABY on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
The present study used three species (Picea smithiana, Juniperus excelsa and Pinus gerardiana) ring-width chronologies to investigate palaeo-temperature history in Gilgit valleys Northern Pakistan. Picea smithiana Jutial chronology was used to reconstruct March-June temperatures back to A.D. 1523. The calibration model explained 38.16% of the variance in temperature. The reconstructed temperature ... More
Presented by Mr. Muhammad ZAFAR on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
Compared to the western United States, there is a relative paucity in the understanding of historic fire regimes in the wet and cool north eastern United States. We investigated historic fire frequencies at three different sites in the Pine Creek valley of north central Pennsylvania. Fire scarred living trees and remnant materials were dated using dendrochronological methods. Considering all s ... More
Presented by Mr. Joseph MARSCHALL on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
We developed a 750-year tree-ring chronology from Piñon pine trees growing near Grandview Campground (GVP) in the White Mountains to refine the Methuselah Walk bristlecone pine precipitation reconstruction (MWK) which failed to capture five of the ten driest years during its calibration period. GVP was significantly correlated with MWK over 1500–2009 (r = 0.7, p < 0.001) and tracked precipitati ... More
Presented by Thomas WILDING on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
Traumatic resin ducts form in xylem and phloem tissue of conifers in response to abiotic wounding, fungal invasion, and insect attack. Little is known about resin duct characteristics in the wood of fire-scarred trees. The aim of this study is to quantify changes in traits of both axial and radial resin ducts, along with those of associated epithelial cells and fusiform rays, in 2 individuals each ... More
Presented by Dr. Estelle ARBELLAY on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
Trees are excellent recorders of rockfall activity in terms of their spatio-temporal activity and possible changes thereof. Rockfall depends, among others, on freeze-thaw cycles and the melting of winter ice in clefts. Its temporal frequency and magnitude will likely be altered at higher elevations due to on-going climatic changes. Here we focus on rockfalls triggered from a rock glacier in the Sw ... More
Presented by Prof. Markus STOFFEL on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
We developed a 700-yr, spatially-explicit fire history from 344 crossdated samples and a 1,100-yr estimation of summer precipitation from Pinus sylvestris trees growing across two nature reserves in mid Sweden to examine patterns of fire activity and fire-climate relationships in the context of varying land use. Shifts in the frequency, area, and variance of fire events occurred synchronously in t ... More
Presented by Dr. Evan LARSON on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
Blue Intensity (BI) has the potential to provide information on past summer temperatures of a similar quality to maximum latewood density (MXD) at a substantially lower cost. As part of the Scottish Pine Project, BI chronologies have been generated for 17 woodlands from a wider ~50 site Scots pine network around the Scottish Highlands. Focussing on two sites in the Cairngorms National Park, Scotla ... More
Presented by Dr. Rob WILSON on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
We investigated the sensitivity of sugar maple (Acer saccharum) annual radial growth to climatic variability in Algonquin Provincial Park, south-central Ontario, Canada, using dendroecological techniques. Site chronologies were developed from 19 stands of sugar maple across a range of edaphic conditions and stand properties, but within a small geographical area. Specific sites varied in their re ... More
Presented by Ms. Kerry SCHUTTEN on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
Size-related tree responses to climate change are still poorly understood at the individual tree level. We seek to disentangle the relative contribution of tree size to growth-climate relationships in Abies pinsapo Boiss. at southern Spain. Dendrochronological methods were applied to quantify growth-climate relationships of contrasting five size groups. We used bootstrapped response functions to ... More
Presented by Dr. Raul SANCHEZ-SALGUERO
Type: Poster Presentation Session: Poster Session + Reception
Since its discovery in the west courtyard of the Chacoan great house of Pueblo Bonito, the “rooted tree” labeled JPB-99 has captivated the imaginations of archaeologists and the public alike. It stands alone in the archaeological record of the Southwest as the only non-architectural timber unearthed within a ruin. Ideas abound regarding its relevance to the design, location, and ritual practic ... More
Presented by Christopher GUITERMAN on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
Mongolia has recently focused on agricultural initiatives to improve food security under the uncertainty of climate change. We used a network of tree-ring chronologies to reconstruct May-September Yeruu River streamflow (1680-2001) to better understand historical climate variability in the ‘eastern’ part of the Mongolian Breadbasket. Model calibration from 1959-1987 captured 60.8% of the instr ... More
Presented by Caroline LELAND on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
To understand how the future climate will affect the boreal forest, we studied growth responses to climate variability in black spruce (Picea mariana) and trembling aspen (Populus tremuloides) two major co-occurring boreal tree species of the eastern Canadian boreal forest. We analysed climate growth interaction during (i) periods of non-anomalous growth and (ii) in years with strong growth anomal ... More
Presented by Dr. Igor DROBYSHEV on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
We present the first annual δ13C analyses from Fitzroya cupressoides, one of the oldest tree species in the world. Preliminary results from four series (since 1900) from trees growing in the Coastal (2) and Andean cordillera (2) indicate a significant increasing trend in intrinsic water use efficiency that is especially strong during the last 50 years. Tree growth data from tree-ring chronologies ... More
Presented by Mrs. Rocio URRUTIA JALABERT on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
Stable carbon and oxygen isotopic analyses are presented from 14C dated living Acacia tortilis (Forssk.) Hayne trees sampled with the aim of exploring the stable isotope palaeoclimatic potential of this species in xeric regions of northern Africa. Trees were sampled at Gebeit (Red Sea State, Sudan) under the auspices of the ACACIA Project. Stable carbon isotopic ratios were assigned calendar dates ... More
Presented by Dr. Mary GAGEN on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
As part of the 2012 North American Dendroecological Field Week (NADEF), we reconstructed stand dynamics of a depression on a lava flow in the Valles Caldera National Preserve, New Mexico. Our study area presented a unique opportunity to assess stand dynamics as related to aspect. Within each of five plots (N, S, E, W slopes and depression center) we collected tree-ring data from 10 live or dead ... More
Presented by Mr. Joseph PETTIT on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
We developed a streamflow reconstruction of the Biobío River, located on the limit of influence of Mediterranean and wet-temperate climate. We compared it with previous reconstructions from the Temperate (Puelo-River) and Mediterranean (Maule-River) climates. The present trend of reduced flow in both Biobío and Puelo Rivers seems to be part of a low frequency cycle (>80 years) shared by these r ... More
Presented by Dr. Ariel MUñOZ on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
Across much of its native range, eastern hemlock (Tsuga canadensis L.) is threatened by the invasive forest pest, hemlock woolly adelgid (HWA) (Adelges tsugae Annand). In West Virginia, the Wildlife Diversity Unit (WDU) has listed hemlock forest systems as a “very high” conservation priority due to the extrinsic threat of HWA infestation and declining quality of these systems. Eight permanen ... More
Presented by Dr. Tom SALADYGA on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
Effects of recent warming and fire suppression have created unprecedented changes in fire behavior and severity of wildland fires in some forests of the Western US. Wildland urban interfaces (WUIs) are particularly vulnerable in the context of these changes. One of the best resources we have for informing future fire management and understanding the interactions of climate, humans and wildfires ... More
Presented by Mr. Joshua FARELLA on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
The 8.2 ka event has been recognized as one of the most significant cooling periods during the Holocene in the north Atlantic realm. However, clear evidence for an 8.2 ka event-related reaction of Alpine glaciers was missing for a long time. In the light of dendrochronological analyses for more than 30 tree remains found in front of the Mont Miné Glacier, Swiss Alps, we present evidence for such ... More
Presented by Dr. Kurt NICOLUSSI on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
Track: Tree-ring network analysis
The DCCD is a dendrochronological data repository for Humanities-based research (http://dendro.dans.knaw.nl). It uses the International Tree-Ring Data Standard (TRiDaS), software library TRiCYCLE for ingesting/exporting data in many digital formats, and Access (MS) system TRiDaBASE for exporting/ingesting metadata. The repository contains all heritage-related tree-ring research performed in the Ne ... More
Presented by Dr. Peter BREWER on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
The continuous, dated, bristlecone pine tree-ring chronology from the Inyo White Mountains is currently over 8,800 years long. It is composed of samples from living trees up to a few thousand years in age as well as from remnant pieces of wood from trees lived a long time but that died long ago. The remnant samples were crossdated with the living-tree dated chronology in order to extend it. Thi ... More
Presented by Dr. Paul R. SHEPPARD
Type: Poster Presentation Session: Poster Session + Reception
Cedars (Thuja occidentalis) that grow on the Niagara Escarpment cliff face provide a unique opportunity to examine the paleoclimate of eastern North America: they are the oldest trees east of the Rockies, they bisect Canada’s population centre, and transect the northwestern limit of tropically originating hurricane tracks – which reach southwestern Ontario approximately once per decade. Thes ... More
Presented by Ze'ev GEDALOF on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
Oregon white oak (Quercus garryana) is an integral part of the ecosystem in the Willamette Valley, Oregon. Human activities including fire suppression and land use change have resulted in the dominance of Douglas fir, making native oak habitat in the region rare. Understanding the relative importance of human vs. climate impacts on Quercus garryana growth will inform conservation techniques for la ... More
Presented by Dr. Karen ARABAS on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
We examined the influence of landscape structure on disturbance, succession, and the duration of legacies initiated by fire across a naturally fragmented boreal forest in northern Sweden. We inventoried 2,038 trees, of which 1,249 were cored and dated, and collected 128 soil samples on 16 distinct forested islands. Several stand characteristics were significantly correlated with island size, inclu ... More
Presented by Ms. Sarah SCOTT on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
Contingent site factors such as tree age may be relevant for the negative effects of climatic change in drought-prone Mediterranean mountain forests. We evaluated growth-climate response in two relict Pinus nigra subsp. salzmannii populations in SE Spain, for two age (mature-age ≤ 100 years; old-age > 100 years). We found significant negative correlations of growth and DRI (drought index) sugges ... More
Presented by Dr. Raul SANCHEZ-SALGUERO
Type: Poster Presentation Session: Poster Session + Reception
For ancient Egypt, a fundamental concept remains unresolved: time. Despite being the focus of nearly 200 years of research, thousands of archaeological excavations, and despite survival of an extensive written record, the chronology of Egypt has been based on a fragmented copy of a 3rd century BC historian’s chronicle of the pharaonic period. To refine this framework, Egyptologists have relied o ... More
Presented by Dr. Pearce Paul CREASMAN on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
Traumatic resin ducts (TRDs) in trees are commonly associated with insect of fungal attacks, mechanical injury or fire damage during the growing season. Here we present records of TRDs from Red fir (Abies magnifica var. shastensis) at five sites along the central Pacific Coast of the western United States. The ratio of rings with TRDs to undamaged rings is highest in the south, and more TRDs are o ... More
Presented by Max TORBENSON on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
In 1946, 25 Castor canadensis pairs were introduced in Tierra del Fuego Island. Today more than 100,000 individuals of this species are distributed in several islands in the southern Patagonia archipielagos and even in the South American continent. The advances of the beaver populations were not systematically registered. We collected 200 dendrochronological samples in seven sites in the continen ... More
Presented by Ms. Giorgia GRAELLS on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
Assessing the effects of sunspots on the tree growth was the very first application for which dendrochronology was used. The founder of the scientific use of tree rings, A. E. Douglass began the long development of this method by posing the question of relationship between the Sun activity and the tree growth. The first conclusions drawn from the analysis have not been decisive due to an early sta ... More
Presented by Mrs. Aneta RZEPECKA, Mrs. Karolina JANECKA on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
In most cases, gauged river flow records in southern South America extend for only a few decades, hampering the detection of long-term cycles and trends. In northern Patagonia, Argentina, the Río Neuquén has great importance for local and national socio-economic activities. We reconstructed the October–June mean streamflow for the period 1346–2000 AD based on a network of 43 tree-ring chrono ... More
Presented by Dr. Ignacio MUNDO on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
Tree-rings provide high-resolution records of past climate variations. Five regional tree-ring chronologies from Nothofagus pumilio, the dominant subalpine species in Southern Patagonia, were developed in Santa Cruz, Argentina. Sampling sites were located between 47° and 53°S along both elevation (600-1200 m) and precipitation gradients (west-to-east; 4000 to 1000 mm). In this study, we focus on ... More
Presented by Mrs. Aliénor LAVERGNE on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
Insect outbreaks from Ormiscodes anphimone are easily recognized in the Patagonian landscape due to changes in color of Nothofagus pumilio forests in response to strong tree defoliation. In this study we use 26 N. pumilio tree-ring chronologies along a S-N transect from El Chaltén (49º25’S) to Laguna del Desierto (49º00’S) in southern Patagonia to reconstruct past Ormiscodes outbreaks over ... More
Presented by Dr. Mariano MORALES on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
We investigate climate interannual variance and decadal variability in tree rings from the periphery of the retreating Laurentide Ice Sheet to understand how the warming atmosphere affected tree growth and how changes in atmospheric circulation altered high-frequency modes of climate variability. The Great Lakes region provides geological circumstances that favored preservation of ancient wood in ... More
Presented by Dr. Irina PANYUSHKINA on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
This work presents the first tree-ring reconstructions of hydroclimate for the Upper Klamath River basin, which stretches from northern California into southern Oregon. The extended record provides a centuries-long perspective on the region’s hydroclimatic variability and context for water-related political issues that have erupted in recent years. Reconstructions of water year precipitation for ... More
Presented by Steven MALEVICH on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
Asian monsoon circulation might be better inferred from tree-ring oxygen stable isotope ratios than ring widths alone, which primarily record local pre-monsoon drought conditions. Here, we present new evidences on the effect of climate and circulation dynamics on stable isotope series in tree-rings from Fokienia hodginsii, a long-lived conifer from southeast Asian highlands. Preliminary analysis r ... More
Presented by Dr. Dario MARTIN-BENITO on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
In this investigation, we assessed the utility of tree-ring width and δ13C from Tsuga canadensis and Quercus rubra trees growing at Harvard Forest, MA to reconstruct drought in New England. We conducted a correlation analysis between ring width, δ13C, and Palmer Drought Severity Index at varying spatial scales (forest stand to region) with data from 1991-2010. As expected, tree-ring width showed ... More
Presented by Stockton MAXWELL on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
TreeFlow (http://treeflow.info) is a web resource for tree-ring reconstructions of streamflow and climate, providing access to data for over 60 reconstructions as well as information about methodology and applications. It was first developed in 2003 for Colorado river basins, and expanded in 2009 to all of the western US. While the primary users of streamflow reconstructions have been water resour ... More
Presented by Jeffrey LUKAS on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
We updated the eastern white pine chronology developed by Dr. Ed Cook at Devil’s Lake State Park, Wisconsin for an introduction to dendrochronology class project. The original chronology spanned 1642–1982, with a series intercorrelation of 0.664 and mean sensitivity of 0.25. We cored white pines growing on exposed talus slopes overlooking Devil’s Lake and although we encountered rot in nearl ... More
Presented by Mr. Ben GULTCH on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
We updated and examined the stability of the climate response exhibited by the Presque Isle River eastern hemlock chronology developed by Dr. Ed Cook in 1983 along the shores of Lake Superior in northern Michigan. The original and new chronologies were significantly correlated (r2 = 0.9), indicating we successfully updated the original chronology. The updated chronology spanned the period AD 1444 ... More
Presented by Mr. Gabriel BROWNELL on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
Track: Dendrogeomorphology
Past activity on seven landslides of the Barcelonnette valley (French Alps) was reconstructed from 759 conifers (3036 cores). Based on 1298 growth anomalies, we identify 61 landslide phases since 1890. Logistic regressions using monthly rainfall data and temperature anomalies indicate that landslides used to occur after wet winters with subsequent positive temperature anomalies in spring, and ther ... More
Presented by Dr. Christophe CORONA on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
Mountain pine beetles are major disturbance agents that have affected millions of hectares of forest in North America. They cause vast tree mortality, reducing forest productivity and altering regional carbon dynamics. Consequently, developing techniques to accurately date tree mortality is of increasing relevance. To estimate the date of tree mortality, many studies have used the ‘red phase/gre ... More
Presented by Ms. Emily DYNES
Type: Poster Presentation Session: Poster Session + Reception
Badlands are one of the most significant features of erosion and cause huge environmental and economic impacts to society, especially in semi-arid areas with strongly marked seasonal climatic contrasts. In this study, we present a methodology based on the analysis of exposed roots from Pinus pinaster Ait. and terrestrial laser scanning (TLS) to estimate medium-term erosion rates in a badland of th ... More
Presented by Dr. Juan Antonio BALLESTEROS CANOVAS on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
Topoclimatic factors can influence seasonal controls on tree growth within local conifer populations, producing differing response signals in measurements of ring properties. Accordingly, microsite chronologies are targeted in a new study design to enhance discrete climatic signals. In semi-arid environments, high resolution palaeohistory of water supply is considered a valuable planning tool for ... More
Presented by Mr. Scotty STRACHAN on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
Wave regeneration describes a process involving the death of trees along a narrow moving front perpendicular to the direction of the prevailing winds. For southern Patagonia, regenerating waves are known for the southern island of Tierra del Fuego but have not been reported for the continental forests yet. We reconstructed the history of wave mortality and regeneration patches in Nothofagus pumili ... More
Presented by Dr. Mariano AMOROSO on 15/05/2013 at 01:00
Type: Poster Presentation Session: Poster Session + Reception
Xylogenesis is the method of monitoring cell formation allowing the description of cambial activity and every new xylem cell during the growing season. Cell formation and cell characteristics can be compared with many biotic and abiotic factors. We are conducting research on Douglas fir at three locations in the montane forest of southern Alberta (Canada) during the vegetation season 2013. Chose ... More
Presented by Ms. Jana HOZOVá, Mr. Jakub HACURA on 15/05/2013 at 01:00