Size-Mediated Climate-Growth Relationships in Temperate Forests: A Multi-Species Analysis. Mérian, P. & Lebourgeois, F. Forest Ecology and Management, 261(8):1382–1391, April, 2011. doi abstract bibtex In most dendrochronological studies, climate-growth relationships are established on dominant trees to minimize non-climatic signals. However, response to environmental factors may be affected by tree-size, which begs the question of the representativeness of dominant trees on the stand level. To highlight the variations in climate-growth relationships among sizes and species, under a wide range of ecological conditions (climate and soil properties), 61 pure even-aged stands were sampled across France. At each stand, two tree-ring chronologies were established from 10 big- to 10 small-diameter trees. Our objectives were, (1) to assess variations in climate sensitivity between the two size-diameter classes, and (2) to investigate the role of species and ecological conditions on these variations. The climate-growth relationships were evaluated from 122 tree-ring chronologies (1~220 trees) through extreme growth years and correlation function analyses. Sensitivity to climate of shade-intolerant and moderately shade-tolerant species (Picea abies (L.) Karst., Pinus sylvestris L. and Quercus petraea (Matt.) Liebl.) remained constant between the size-diameter classes for both temperature and hydric balance, while the shade-tolerant species Abies alba Mill. and Fagus sylvatica L. displayed significant differences, with larger trees being more sensitive to summer drought than smaller trees. This difference increased with increasing climatic xericity. Our results suggest that, for shade-tolerant species, (1) big trees could be more sensitive to climatic change especially under xeric climate, and (2) future tree ring studies should include trees stratified by size to produce unbiased estimation of sensitivity to climate. \^a\textordmasculine We investigated the tree-size effect on sensitivity to climate. \^a\textordmasculine Study was led on a multi-species network at broad scale. \^a\textordmasculine Only shade-tolerant species display changes in sensitivity among size-classes. \^a\textordmasculine Increasing local xericity induces increasing differences in sensitivity.
@article{merianSizemediatedClimategrowthRelationships2011,
title = {Size-Mediated Climate-Growth Relationships in Temperate Forests: A Multi-Species Analysis},
author = {M{\'e}rian, Pierre and Lebourgeois, Fran{\c c}ois},
year = {2011},
month = apr,
volume = {261},
pages = {1382--1391},
issn = {0378-1127},
doi = {10.1016/j.foreco.2011.01.019},
abstract = {In most dendrochronological studies, climate-growth relationships are established on dominant trees to minimize non-climatic signals. However, response to environmental factors may be affected by tree-size, which begs the question of the representativeness of dominant trees on the stand level. To highlight the variations in climate-growth relationships among sizes and species, under a wide range of ecological conditions (climate and soil properties), 61 pure even-aged stands were sampled across France. At each stand, two tree-ring chronologies were established from 10 big- to 10 small-diameter trees. Our objectives were, (1) to assess variations in climate sensitivity between the two size-diameter classes, and (2) to investigate the role of species and ecological conditions on these variations. The climate-growth relationships were evaluated from 122 tree-ring chronologies (1~220 trees) through extreme growth years and correlation function analyses. Sensitivity to climate of shade-intolerant and moderately shade-tolerant species (Picea abies (L.) Karst., Pinus sylvestris L. and Quercus petraea (Matt.) Liebl.) remained constant between the size-diameter classes for both temperature and hydric balance, while the shade-tolerant species Abies alba Mill. and Fagus sylvatica L. displayed significant differences, with larger trees being more sensitive to summer drought than smaller trees. This difference increased with increasing climatic xericity. Our results suggest that, for shade-tolerant species, (1) big trees could be more sensitive to climatic change especially under xeric climate, and (2) future tree ring studies should include trees stratified by size to produce unbiased estimation of sensitivity to climate. \^a\textordmasculine{} We investigated the tree-size effect on sensitivity to climate. \^a\textordmasculine{} Study was led on a multi-species network at broad scale. \^a\textordmasculine{} Only shade-tolerant species display changes in sensitivity among size-classes. \^a\textordmasculine{} Increasing local xericity induces increasing differences in sensitivity.},
journal = {Forest Ecology and Management},
keywords = {*imported-from-citeulike-INRMM,~INRMM-MiD:c-8837665,abies-alba,climate-change,drought-tolerance,droughts,fagus-sylvatica,forest-resources,picea-abies,pinus-sylvestris,population-growth,quercus-petraea,shade-tolerance},
lccn = {INRMM-MiD:c-8837665},
number = {8}
}
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