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Evidence for cambial activity in Great Basin subalpine conifers under heavy snow
Presented by Dr. Boris DUFOUR, Dr. Franco BIONDI on 16 May 2013 from 10:20 to 10:40
Type: Oral Presentation
Session: Dendroclimatology II
In order to correctly integrate tree growth parameters at multiple temporal scales in arid and semi-arid mountains, there is now a renewed demand for clearly understanding the physiological mechanisms that control the climatic response of high-elevation conifers. Cellular-level dendroclimatology has already shown great promise, but studies of wood formation are still lacking in the Great Basin. The Nevada Climate-ecohydrological Assessment Network (NevCAN) was recently established as a network of valley-to-mountaintop instrumented transects in the Snake and Sheep Ranges. State-of-the art automated sensors record meteorological, soil, and vegetational variables at these sites, providing unique opportunities for tree-ring science. We present here a preliminary study based on micro-cores collected at the end of May 2011 from subalpine conifers (including Pinus longaeva) growing at 3355 m elevation. Results show that cambial activity had already resumed in many trees despite the presence of a 2-m deep snow pack.