Community size can affect the signals of ecological drift and niche selection on biodiversity

Show simple item record Siqueira, Tadeu Saito, Victor S. Bini, Luis M. Melo, Adriano S. Petsch, Danielle K. Landeiro, Victor L. Tolonen, Kimmo T. Jyrkänkallio-Mikkola, Jenny Soininen, Janne Heino, Jani 2021-02-17T22:53:08Z 2021-12-18T03:45:32Z 2020-06
dc.identifier.citation Siqueira , T , Saito , V S , Bini , L M , Melo , A S , Petsch , D K , Landeiro , V L , Tolonen , K T , Jyrkänkallio-Mikkola , J , Soininen , J & Heino , J 2020 , ' Community size can affect the signals of ecological drift and niche selection on biodiversity ' , Ecology , vol. 101 , no. 6 , 03014 , pp. e03014 .
dc.identifier.other PURE: 132794593
dc.identifier.other PURE UUID: f024b8a2-1565-442e-abdb-0dcfbbee5567
dc.identifier.other RIS: urn:64718582E5A793BC3CA9BE318900FBED
dc.identifier.other WOS: 000530138200002
dc.identifier.other ORCID: /0000-0002-0340-6001/work/76332739
dc.identifier.other ORCID: /0000-0002-8583-3137/work/76333123
dc.description.abstract Ecological drift can override the effects of deterministic niche selection on small populations and drive the assembly of some ecological communities. We tested this hypothesis with a unique data set sampled identically in 200 streams in two regions (tropical Brazil and boreal Finland) that differ in macroinvertebrate community size by fivefold. Null models allowed us to estimate the magnitude to which beta-diversity deviates from the expectation under a random assembly process while taking differences in richness and relative abundance into account, i.e., beta-deviation. We found that both abundance- and incidence-based beta-diversity was negatively related to community size only in Brazil. Also, beta-diversity of small tropical communities was closer to stochastic expectations compared with beta-diversity of large communities. We suggest that ecological drift may drive variation in some small communities by changing the expected outcome of niche selection, increasing the chances of species with low abundance and narrow distribution to occur in some communities. Habitat destruction, overexploitation, pollution, and reductions in connectivity have been reducing the size of biological communities. These environmental pressures might make smaller communities more vulnerable to novel conditions and render community dynamics more unpredictable. Incorporation of community size into ecological models should provide conceptual and applied insights into a better understanding of the processes driving biodiversity. en
dc.format.extent 10
dc.language.iso eng
dc.relation.ispartof Ecology
dc.rights unspecified
dc.rights.uri info:eu-repo/semantics/openAccess
dc.subject 1181 Ecology, evolutionary biology
dc.subject aquatic insects
dc.subject beta diversity deviation
dc.subject community assembly
dc.subject demographic stochasticity
dc.subject dispersal
dc.subject metacommunities
dc.subject null models
dc.subject PATTERNS
dc.subject RESTORATION
dc.subject DISTURBANCE
dc.subject DISPERSAL
dc.subject beta-diversity deviation
dc.subject SIMILARITY
dc.title Community size can affect the signals of ecological drift and niche selection on biodiversity en
dc.type Article
dc.contributor.organization Department of Geosciences and Geography
dc.contributor.organization Helsinki Institute of Sustainability Science (HELSUS)
dc.contributor.organization Biosciences
dc.description.reviewstatus Peer reviewed
dc.relation.issn 0012-9658
dc.rights.accesslevel openAccess
dc.type.version acceptedVersion

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