Regime shifts in coastal lagoons: Evidence from free-living marine nematodes

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dc.citation.issue2
dc.citation.volume12
dc.contributor.authorNetto, Sergio Antonio
dc.contributor.authorFonseca, Gustavo [UNIFESP]
dc.contributor.institutionUniversidade Federal de São Paulo (UNIFESP)
dc.coverageSan Francisco
dc.date.accessioned2020-07-17T14:02:56Z
dc.date.available2020-07-17T14:02:56Z
dc.date.issued2017
dc.description.abstractWe test the validity of using the regime shift theory to account for differences in environmental state of coastal lagoons as a response to variation in connectivity with the sea, using free-living nematodes as a surrogate. The study is based on sediment samples from the inner and outer portions of 15 coastal lagoons (5 open to the sea, 5 intermittently open/closed, and 5 permanently closed lakes) along the southern coast of Brazil. Environmental data suggested that there are two contrasting environmental conditions, with coastal lakes being significantly different from open and intermittent lagoons. Marine nematode assemblages corroborate these two mutually exclusive alternative stable states (open vs. closed systems), but assemblages from the intermittently open/closed lagoons showed a gradual change in species composition between both systems independently of the environmental conditions. The gradient in the structural connectivity among lagoons and the sea, due to their regime shifts, changes the movement of resources and consumers and the internal physico-chemical gradients, directly affecting regional species diversity. Whereas openness to the sea increased similarity in nematode assemblage composition among connected lagoons, isolation increased dissimilarity among closed lagoons. Our results from a large-scale sampling program indicated that as lagoons lose connectivity with the sea, shifting the environmental state, local processes within individual intermittently open/closed lagoons and particularly within coastal lakes become increasingly more important in structuring these communities. The main implication of these findings is that depending on the local stable state we may end up with alternative regional patterns of biodiversity.en
dc.description.affiliationUniv Southern Santa Catarina, Marine Sci Lab, Tubarao, SC, Brazil
dc.description.affiliationUniv Fed Sao Paulo, Dept Ciencias Mar, Santos, Brazil
dc.description.affiliationUnifespUniv Fed Sao Paulo, Dept Ciencias Mar, Santos, Brazil
dc.description.sourceWeb of Science
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipFoundation for Research and Innovation of the State of Santa Catarina (FAPESC)
dc.description.sponsorshipIDCNPq: 473293/2010-2
dc.description.sponsorshipIDFAPESC: 09/2009
dc.format.extent-
dc.identifierhttps://dx.doi.org/10.1371/journal.pone.0172366
dc.identifier.citationPlos One. San Francisco, v. 12, n. 2, p. -, 2017.
dc.identifier.doi10.1371/journal.pone.0172366
dc.identifier.fileWOS000394688200074.pdf
dc.identifier.issn1932-6203
dc.identifier.urihttps://repositorio.unifesp.br/handle/11600/55093
dc.identifier.wosWOS:000394688200074
dc.language.isoeng
dc.publisherPublic Library Science
dc.relation.ispartofPlos One
dc.rightsinfo:eu-repo/semantics/openAccess
dc.titleRegime shifts in coastal lagoons: Evidence from free-living marine nematodesen
dc.typeinfo:eu-repo/semantics/article
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