Temporal population variability in local forest communities has mixed effects on tree species richness across a latitudinal gradient

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

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Abstract

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.

Item Type:	Journal Article
Publication:	ECOLOGY LETTERS
Publisher:	WILEY
Additional Information:	copy right of this article belong to WILEY
Keywords:	Biodiversity; environmental variance; extinction risk; stochastic model; storage effect; temporal niche partitioning
Department/Centre:	Division of Biological Sciences > Centre for Ecological Sciences
Date Deposited:	19 Dec 2019 07:47
Last Modified:	19 Dec 2019 07:47
URI:	http://eprints.iisc.ac.in/id/eprint/63932

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