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Adaptive migration promotes food web persistence.

Abstract：

:Interactions between diverse species that coexist in nature are of utmost interest in the field of ecology. Recent theoretical studies have shown that spatiality plays a key role in maintaining complex systems with multiple differing species. In these models, however, organisms move among habitats randomly, implying that some organisms migrate from areas of higher fitness to areas of lower fitness in a maladaptive way. Herein, a meta-community model of a food web shows that adaptive movements by organisms can play key roles in maintaining large ecological communities. Without adaptive dispersal, species are not likely to persist across habitats, particularly when systems have few habitats where local food webs are strongly coupled by high migration rates. However, adaptive dispersers can improve such low persistence greatly. By abandoning unfavourable habitats for favourable habitats, dispersers prevent regional extinction at the price of local extinction and increase their total numbers further. Hence, the inherent stabilising effect of spatiality may be larger than that expected from theoretical random movement models.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Mougi A

doi

10.1038/s41598-019-49143-8

subject

Has Abstract

pub_date

2019-09-02 00:00:00

pages

12632

issue

1

issn

2045-2322

pii

10.1038/s41598-019-49143-8

journal_volume

9

pub_type

杂志文章

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