Temporal population variability in local forest communities has mixed effects on tree species richness across a latitudinal gradient.
Biodiversity
environmental variance
extinction risk
stochastic model
storage effect
temporal niche partitioning
Journal
Ecology letters
ISSN: 1461-0248
Titre abrégé: Ecol Lett
Pays: England
ID NLM: 101121949
Informations de publication
Date de publication:
Jan 2020
Jan 2020
Historique:
received:
28
05
2019
revised:
04
07
2019
accepted:
29
09
2019
pubmed:
8
11
2019
medline:
18
12
2019
entrez:
8
11
2019
Statut:
ppublish
Résumé
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.
Types de publication
Letter
Langues
eng
Sous-ensembles de citation
IM
Pagination
160-171Subventions
Organisme : ISF-NRF Singapore joint research program
ID : WBS R-154-000-B09-281
Organisme : the Rockefeller Foundation
Organisme : the John Merck Fund
Organisme : the John D. and Catherine T. MacArthur Foundation
Organisme : Andrew W. Mellon Foundation
Organisme : the Frank Levinson Family Foundation
Organisme : National Science Foundation
ID : DEB-1545761
Informations de copyright
© 2019 John Wiley & Sons Ltd/CNRS.
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