生物多样性
生态学
多样性(政治)
变化(天文学)
物种多样性
密度依赖性
热带森林
生物
地理
人口
人类学
天体物理学
物理
社会学
人口学
作者
Lisa Hülsmann,Ryan A. Chisholm,Florian Härtig
标识
DOI:10.1016/j.tree.2020.10.003
摘要
Half a century ago, Janzen and Connell hypothesized that the high tree species diversity in tropical forests is maintained by specialized natural enemies. Along with other mechanisms, these can cause conspecific negative density dependence (CNDD) and thus maintain species diversity. Numerous studies have measured proxies of CNDD worldwide, but doubt about its relative importance remains. We find ample evidence for CNDD in local populations, but methodological limitations make it difficult to assess if CNDD scales up to control community diversity and thereby local and global biodiversity patterns. A combination of more robust statistical methods, new study designs, and eco-evolutionary models are needed to provide a more definite evaluation of the importance of CNDD for geographic variation in plant species diversity.
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