Landscape heterogeneity buffers biodiversity of simulated meta-food-webs under global change through rescue and drainage effects.
Journal
Nature communications
ISSN: 2041-1723
Titre abrégé: Nat Commun
Pays: England
ID NLM: 101528555
Informations de publication
Date de publication:
05 08 2021
05 08 2021
Historique:
received:
27
05
2020
accepted:
12
07
2021
entrez:
6
8
2021
pubmed:
7
8
2021
medline:
14
8
2021
Statut:
epublish
Résumé
Habitat fragmentation and eutrophication have strong impacts on biodiversity. Metacommunity research demonstrated that reduction in landscape connectivity may cause biodiversity loss in fragmented landscapes. Food-web research addressed how eutrophication can cause local biodiversity declines. However, there is very limited understanding of their cumulative impacts as they could amplify or cancel each other. Our simulations of meta-food-webs show that dispersal and trophic processes interact through two complementary mechanisms. First, the 'rescue effect' maintains local biodiversity by rapid recolonization after a local crash in population densities. Second, the 'drainage effect' stabilizes biodiversity by preventing overshooting of population densities on eutrophic patches. In complex food webs on large spatial networks of habitat patches, these effects yield systematically higher biodiversity in heterogeneous than in homogeneous landscapes. Our meta-food-web approach reveals a strong interaction between habitat fragmentation and eutrophication and provides a mechanistic explanation of how landscape heterogeneity promotes biodiversity.
Identifiants
pubmed: 34354058
doi: 10.1038/s41467-021-24877-0
pii: 10.1038/s41467-021-24877-0
pmc: PMC8342463
doi:
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
4716Informations de copyright
© 2021. The Author(s).
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