Up, down, and all around: scale-dependent spatial variation in rocky-shore communities of Fildes peninsula, King George island, antarctica

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dc.contributor.authorValdivia, Nelson
dc.contributor.authorDíaz, María José
dc.contributor.authorHoltheuer, Jorge
dc.contributor.authorGarrido, Ignacio
dc.contributor.authorHuovinen, Pirjo
dc.contributor.authorGómez, Iván
dc.coverage.spatialKing George Island
dc.date.accessioned2019-01-07T18:47:16Z
dc.date.available2019-01-07T18:47:16Z
dc.date.issued2014-06-23
dc.description.abstractUnderstanding the variation of biodiversity along environmental gradients and multiple spatial scales is relevant for theoretical and management purposes. Hereby, we analysed the spatial variability in diversity and structure of intertidal and subtidal macrobenthic Antarctic communities along vertical environmental stress gradients and across multiple horizontal spatial scales. Since biotic interactions and local topographic features are likely major factors for coastal assemblages, we tested the hypothesis that fine-scale processes influence the effects of the vertical environmental stress gradients on the macrobenthic diversity and structure. We used nested sampling designs in the intertidal and subtidal habitats, including horizontal spatial scales ranging from few centimetres to 1000s of metres along the rocky shore of Fildes Peninsula, King George Island. In both intertidal and subtidal habitats, univariate and multivariate analyses showed a marked vertical zonation in taxon richness and community structure. These patterns depended on the horizontal spatial scale of observation, as all analyses showed a significant interaction between height (or depth) and the finer spatial scale analysed. Variance and pseudo-variance components supported our prediction for taxon richness, community structure, and the abundance of dominant species such as the filamentous green alga Urospora penicilliformis (intertidal), the herbivore Nacella concinna (intertidal), the large kelp-like Himantothallus grandifolius (subtidal), and the red crustose red alga Lithothamnion spp. (subtidal). We suggest that in coastal ecosystems strongly governed by physical factors, fine-scale processes (e. g. biotic interactions and refugia availability) are still relevant for the structuring and maintenance of the local communities. The spatial patterns found in this study serve as a necessary benchmark to understand the dynamics and adaptation of natural assemblages in response to observed and predicted environmental changes in Antarctica.es_ES
dc.description.sponsorshipFinancial support was provided by the PIA-CONICYT Anillo grant # ART1101 to I.G., P.H., and N.V.; and by the Programa de Mejoramiento de la Calidad y la Equidad de la Educacioen Superior (MECESUP) through grant # AUS0805 Fortalecimiento de las Ciencias Ecoloegicas y Evolutivas en la UACH to N.V. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.es_ES
dc.identifier.citationPLoS ONE 9(6): e100714es_ES
dc.identifier.issne1932-6203
dc.identifier.otherDOI:10.1371/journal.pone.0100714
dc.identifier.urihttp://hdl.handle.net/20.500.11894/1215
dc.language.isoenes_ES
dc.publisherPublic Library of Science (PLOS)es_ES
dc.relation.ispartofPlos Onees_ES
dc.relation.ispartofVol. 9(6)
dc.rightsCreative Commons Attribution 4.0 International licensees_ES
dc.subjectCienciaes_ES
dc.subjectIntertidal habitatses_ES
dc.subjectIce scoures_ES
dc.subjectDisturbancees_ES
dc.subjectMacroalgas polareses_ES
dc.subjectZonationes_ES
dc.subjectBiodiversityes_ES
dc.titleUp, down, and all around: scale-dependent spatial variation in rocky-shore communities of Fildes peninsula, King George island, antarcticaes_ES
dc.typeArtículoes_ES

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