The geography of metapopulation synchrony in dendritic river networks.
Fish time-series
fluvial variography
metapopulations
network topology
spatial patterns
spatial synchrony
Journal
Ecology letters
ISSN: 1461-0248
Titre abrégé: Ecol Lett
Pays: England
ID NLM: 101121949
Informations de publication
Date de publication:
Apr 2021
Apr 2021
Historique:
revised:
30
09
2020
received:
13
08
2020
accepted:
07
01
2021
pubmed:
24
2
2021
medline:
19
3
2021
entrez:
23
2
2021
Statut:
ppublish
Résumé
Dendritic habitats, such as river ecosystems, promote the persistence of species by favouring spatial asynchronous dynamics among branches. Yet, our understanding of how network topology influences metapopulation synchrony in these ecosystems remains limited. Here, we introduce the concept of fluvial synchrogram to formulate and test expectations regarding the geography of metapopulation synchrony across watersheds. By combining theoretical simulations and an extensive fish population time-series dataset across Europe, we provide evidence that fish metapopulations can be buffered against synchronous dynamics as a direct consequence of network connectivity and branching complexity. Synchrony was higher between populations connected by direct water flow and decayed faster with distance over the Euclidean than the watercourse dimension. Likewise, synchrony decayed faster with distance in headwater than mainstem populations of the same basin. As network topology and flow directionality generate fundamental spatial patterns of synchrony in fish metapopulations, empirical synchrograms can aid knowledge advancement and inform conservation strategies in complex habitats.
Identifiants
pubmed: 33619868
doi: 10.1111/ele.13699
pmc: PMC8049041
doi:
Types de publication
Letter
Langues
eng
Sous-ensembles de citation
IM
Pagination
791-801Subventions
Organisme : H2020 Environment
ID : Grant Agreement No. 748969
Organisme : Deutsche Forschungsgemeinschaft
ID : FTZ 118
Informations de copyright
© 2021 The Authors. Ecology Letters published by John Wiley & Sons Ltd.
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