Habitat fragmentation and species diversity in competitive communities.
Fragmentation
habitat loss
individual-based models
metacommunity theory
simulation model
spatial models
species richness
Journal
Ecology letters
ISSN: 1461-0248
Titre abrégé: Ecol Lett
Pays: England
ID NLM: 101121949
Informations de publication
Date de publication:
Mar 2020
Mar 2020
Historique:
received:
04
07
2019
revised:
19
08
2019
revised:
06
11
2019
accepted:
20
11
2019
pubmed:
22
12
2019
medline:
11
2
2020
entrez:
22
12
2019
Statut:
ppublish
Résumé
Habitat loss is one of the key drivers of the ongoing decline of biodiversity. However, ecologists still argue about how fragmentation of habitat (independent of habitat loss) affects species richness. The recently proposed habitat amount hypothesis posits that species richness only depends on the total amount of habitat in a local landscape. In contrast, empirical studies report contrasting patterns: some find positive and others negative effects of fragmentation per se on species richness. To explain this apparent disparity, we devise a stochastic, spatially explicit model of competitive species communities in heterogeneous habitats. The model shows that habitat loss and fragmentation have complex effects on species diversity in competitive communities. When the total amount of habitat is large, fragmentation per se tends to increase species diversity, but if the total amount of habitat is small, the situation is reversed: fragmentation per se decreases species diversity.
Identifiants
pubmed: 31863571
doi: 10.1111/ele.13450
pmc: PMC7027465
doi:
Types de publication
Letter
Langues
eng
Sous-ensembles de citation
IM
Pagination
506-517Subventions
Organisme : Norges Forskningsråd
ID : 223257
Organisme : Jane ja Aatos Erkon Säätiö
Organisme : H2020 Marie Skłodowska-Curie Actions
ID : 754411
Organisme : H2020 Marie Skłodowska-Curie Actions
ID : 840605
Organisme : Biotieteiden ja Ympäristön Tutkimuksen Toimikunta
Organisme : Academy of Finland
ID : 308651
Organisme : Academy of Finland
ID : 309581
Informations de copyright
© 2019 The Authors. Ecology Letters published by CNRS and John Wiley & Sons Ltd.
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