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Temporal population variability in local forest communities has mixed effects on tree species richness across a latitudinal gradient.
Ecology Letters ( IF 8.8 ) Pub Date : 2019-11-07 , DOI: 10.1111/ele.13412
Tak Fung,Ryan A Chisholm,Kristina Anderson-Teixeira,Norm Bourg,Warren Y Brockelman,Sarayudh Bunyavejchewin,Chia-Hao Chang-Yang,Rutuja Chitra-Tarak,George Chuyong,Richard Condit,Handanakere S Dattaraja,Stuart J Davies,Corneille E N Ewango,Gary Fewless,Christine Fletcher,C V Savitri Gunatilleke,I A U Nimal Gunatilleke,Zhanqing Hao,J Aaron Hogan,Robert Howe,Chang-Fu Hsieh,David Kenfack,YiChing Lin,Keping Ma,Jean-Remy Makana,Sean McMahon,William J McShea,Xiangcheng Mi,Anuttara Nathalang,Perry S Ong,Geoffrey Parker,E-Ping Rau,Jessica Shue,Sheng-Hsin Su,Raman Sukumar,I-Fang Sun,Hebbalalu S Suresh,Sylvester Tan,Duncan Thomas,Jill Thompson,Renato Valencia,Martha I Vallejo,Xugao Wang,Yunquan Wang,Pushpa Wijekoon,Amy Wolf,Sandra Yap,Jess Zimmerman

Among the local processes that determine species diversity in ecological communities, fluctuation-dependent mechanisms that are mediated by temporal variability in the abundances of species populations have received significant attention. Higher temporal variability in the abundances of species populations can increase the strength of temporal niche partitioning but can also increase the risk of species extinctions, such that the net effect on species coexistence is not clear. We quantified this temporal population variability for tree species in 21 large forest plots and found much greater variability for higher latitude plots with fewer tree species. A fitted mechanistic model showed that among the forest plots, the net effect of temporal population variability on tree species coexistence was usually negative, but sometimes positive or negligible. Therefore, our results suggest that temporal variability in the abundances of species populations has no clear negative or positive contribution to the latitudinal gradient in tree species richness.

中文翻译:

当地森林群落中的时间种群变异性对整个纬度梯度上的树木物种丰富度具有不同的影响。

在决定生态群落中物种多样性的局部过程中,由物种种群数量的时间变化介导的依赖于波动的机制受到了极大的关注。物种种群数量的较高时间变异性可以增加时间生态位分配的强度,但也可以增加物种灭绝的风险,因此对物种共存的净影响尚不清楚。我们在21个大型森林地块中对树木物种的这种时间种群变异性进行了量化,并发现在较高的纬度地块中树木物种较少的变异性更大。拟合的机械模型表明,在林地中,临时种群变化对树木物种共存的净影响通常为负,但有时是积极的或微不足道的。因此,我们的结果表明,物种种群丰富度的时间变化对树木物种丰富度的纬度梯度没有明显的负面或正面影响。
更新日期:2019-11-07
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