Consistent richness-biomass relationship across environmental gradients in a marine macroalgal-dominated subtidal community on the western antarctic peninsula

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dc.contributor.authorValdivia, Nelson
dc.contributor.authorDíaz, María José
dc.contributor.authorGarrido, Ignacio
dc.contributor.authorGómez, Iván
dc.contributor.editorMahon, Andrew R.
dc.coverage.spatialKing George Island
dc.date.accessioned2019-01-04T21:16:05Z
dc.date.available2019-01-04T21:16:05Z
dc.date.issued2015-09-18
dc.description.abstractBiodiversity loss has spurred the biodiversity-ecosystem functioning research over a range of ecosystems. In Antarctica, however, the relationship of taxonomic and functional diversity with ecosystem properties (e.g., community biomass) has received less attention, despite the presence of sharp and dynamic environmental stress gradients that might modulate these properties. Here, we investigated whether the richness-biomass relationship in macrobenthic subtidal communities is still apparent after accounting for environmental stress gradients in Fildes Bay, King George Island, Antarctica. Measurements of biomass of mobile and sessile macrobenthic taxa were conducted in the austral summer 2013/4 across two environmental stress gradients: distance from nearest glaciers and subtidal depth (from 5 to 30 m). In general, community biomass increased with distance from glaciers and water depth. However, generalised additive models showed that distance from glaciers and depth accounted for negligible proportions of variation in the number of functional groups (i.e., functional richness) and community biomass when compared to taxonomic richness. Functional richness and community biomass were positive and saturating functions of taxonomic richness. Large endemic, canopy-forming brown algae of the order Desmarestiales dominated the community biomass across both gradients. Accordingly, differences in the composition of taxa accounted for a significant and large proportion (51%) of variation in community biomass in comparison with functional richness (10%). Our results suggest that the environmental factors here analysed may be less important than biodiversity in shaping mesoscale (several km) biomass patterns in this Antarctic system. We suggest that further manipulative, hypothesis-driven research should address the role of biodiversity and species' functional traits in the responses of Antarctic subtidal communities to environmental variation.es_ES
dc.description.sponsorshipThis study was financially supported by the Programa de Investigacion Asociativa-Comision Nacional de Investigacion Cientifica y Tecnologica (www.conicyt.cl) grant # ART1101 to IG and NV. While writing, NV was supported by the Programa de Mejoramiento de la Calidad y la Equidad de la Educacion Superior (www.mecesup.cl), grant # AUS0805, and the Fondo Nacional de Desarrollo Cientifico y Tecnologico (www.conicyt.cl/fondecyt), grant # 1141037. 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 10(9): e0138582es_ES
dc.identifier.issn1932-6203
dc.identifier.otherDOI:10.1371/journal.pone.0138582
dc.identifier.urihttp://hdl.handle.net/20.500.11894/1214
dc.language.isoenes_ES
dc.publisherPublic Library of Science (PLOS)es_ES
dc.relation.ispartofPlos Onees_ES
dc.relation.ispartofVol. 10(9)
dc.rightsCreative Commons Attribution 4.0 International licensees_ES
dc.subjectCienciaes_ES
dc.subjectEcosystem productivityes_ES
dc.subjectFunctional diversityes_ES
dc.subjectBiodiversity losses_ES
dc.subjectSpecies richnesses_ES
dc.subjectIces scoures_ES
dc.titleConsistent richness-biomass relationship across environmental gradients in a marine macroalgal-dominated subtidal community on the western antarctic peninsulaes_ES
dc.typeArtículoes_ES

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