Community disruption in small biogenic habitats: A coastal invader overcomes habitat complexity to alter community structure

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dc.contributor.authorMalyshev, A.V.
dc.contributor.authorFlynn, P.T.
dc.contributor.authorCox, R.
dc.contributor.authorDuarte, C.
dc.contributor.authorQuijon, P.A.
dc.contributor.authorPublic Library of Science
dc.date.accessioned2021-10-27T16:37:09Z
dc.date.available2021-10-27T16:37:09Z
dc.date.issued2020-10
dc.descriptionIndexación: Scopus.es
dc.description.abstractNon-indigenous species are often identified as threats to native species and communities. Yet, the mechanisms that enable many of these invaders to thrive and alter their newly invaded habitats are still not fully understood. This applies to habitats such as widespread sedimentary shorelines characterized by the presence of scattered biogenic clumps of blue mussels (Mytilus edulis) structurally more complex than bare sediments. In Atlantic Canada, some of these shorelines are numerically dominated by native mud crabs (Dyspanopeus sayi) but have been gradually invaded by the European green crab (Carcinus maenas). This study describes between-habitat (mussel clump vs. bare sediment) differences in density and diversity of invertebrates. It also tests the impact of juvenile green crabs in comparison to native mud crabs using two approaches: First, measuring habitat-related differences in these crabs' feeding rates on a common prey (soft-shell clams, Mya arenaria). Second, measuring their influence on invertebrate communities associated with mussel clumps. The results show that mussel clumps hold higher invertebrate density and diversity than surrounding sedimentary bottoms. In the laboratory, the feeding rates of native mud crabs were dependent on the type of habitat (sand flat > mussel clump), whereas those of green crabs were significantly higher and unrelated to the habitat in which predation occurred. In field experiments, juvenile green crabs were also the only predators that changed community structure in the mussel clump habitat. These results indicate that green crabs can cause a significant impact on native species and communities. Moreover, they suggest that the ability of this species to overcome the refuge provided by complex biogenic habitats for prey may represent an unexplored mechanism to explain this invader's expansion here and elsewhere. © 2020 Malyshev et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.es
dc.description.urihttps://journals.plos.org/plosone/article?id=10.1371/journal.pone.0241116
dc.identifier.citationPLoS ONE Open Access Volume 15, Issue 10 October October 2020 Article number e0241116es
dc.identifier.doi10.1371/journal.pone.0241116
dc.identifier.issn1932-6203
dc.identifier.urihttp://repositorio.unab.cl/xmlui/handle/ria/20665
dc.language.isoenes
dc.publisherPublic Library of Sciencees
dc.subjectAnimalses
dc.subjectBrachyuraes
dc.subjectCanadaes
dc.subjectFood Chaines
dc.subjectIntroduced Specieses
dc.subjectMyaes
dc.subjectMytilus edulises
dc.subjectPredatory Behaviores
dc.titleCommunity disruption in small biogenic habitats: A coastal invader overcomes habitat complexity to alter community structurees
dc.typeArtículoes
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