growth strategies of tropical tree species disentangling light and size effects增长战略的热带树种理清光和规模效应.pdfVIP

Growth Strategies of Tropical Tree Species: Disentangling Light and Size Effects ¨ 1 2 3,4 5,6 4 Nadja Ruger *, Uta Berger , Stephen P. Hubbell , Ghislain Vieilledent , Richard Condit ¨ ¨ ¨ ¨ 1 Spezielle Botanik und Funktionelle Biodiversitat, Universitat Leipzig, Leipzig, Germany, 2 Institut fur Waldwachstum und Forstliche Informatik, Technische Universitat Dresden, Tharandt, Germany, 3 Department of Ecology and Evolutionary Biology, University of California Los Angeles, Los Angeles, United States of America, 4 Center for Tropical Forest Science, Smithsonian Tropical Research Institute, Washington, District of Columbia, United States of America, 5 UR105 Forest Ecosystem Goods and ˆ ´ Services, Cirad, Montpellier, France, 6 DRP Foret et Biodiversite, Cirad-Madagascar, Antananarivo, Madagascar Abstract An understanding of the drivers of tree growth at the species level is required to predict likely changes of carbon stocks and biodiversity when environmental conditions change. Especially in species-rich tropical forests, it is largely unknown how species differ in their response of growth to resource availability and individual size. We use a hierarchical Bayesian approach to quantify the impact of light availability and tree diameter on growth of 274 woody species in a 50-ha long-term forest census plot in Barro Colorado Island, Panama. Light reaching each individual tree was estimated from yearly vertical censuses of canopy density. The hierarchical Bayesian