Abstract
AbstractSevere droughts have the potential to reduce forest productivity and trigger tree mortality. Most trees face several drought events during their life and therefore resilience to dry conditions may be crucial to long-term survival. We assessed how growth resilience to severe droughts, including its components resistance and recovery, is related to the ability to survive future droughts by using a tree-ring database of surviving and now-dead trees from 118 sites (22 species, >3,500 trees). We found that, across the variety of regions and species sampled, trees that died during water shortages were less resilient to previous non-lethal droughts, relative to coexisting surviving trees of the same species. In angiosperms, drought-related mortality risk is associated with lower resistance (low capacity to reduce impact of the initial drought), while it is related to reduced recovery (low capacity to attain pre-drought growth rates) in gymnosperms. The different resilience strategies in these two taxonomic groups open new avenues to improve our understanding and prediction of drought-induced mortality.
Publisher
Springer Science and Business Media LLC
Subject
General Physics and Astronomy,General Biochemistry, Genetics and Molecular Biology,General Chemistry
Reference74 articles.
1. Pan, Y. et al. A large and persistent carbon sink in the world’s forests. Science 333, 988–993 (2011).
2. Ilstedt, U. et al. Intermediate tree cover can maximize groundwater recharge in the seasonally dry tropics. Sci. Rep. 6, 21930 (2016).
3. Bonan, G. B. Forests, climate, and public policy: a 500-year interdisciplinary Odyssey. Annu. Rev. Ecol. Evol. Syst. 47, 97–121 (2016).
4. FAO. Food and Agriculture Organization of the United Nations. Global Forest Resources Assessment 2015. How are the world’s forests changing? (FAO, 2016).
5. Houghton, R. A. & Nassikas, A. A. Negative emissions from stopping deforestation and forest degradation, globally. Glob. Chang. Biol 38, 42–49 (2017).
Cited by
229 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献