Scale-specific drivers of kelp forest communities

Oecologia
Thomas LamyRobert J Miller

Abstract

Identifying spatial scales of variation in natural communities and the processes driving them is critical for obtaining a predictive understanding of biodiversity. In this study, we focused on diverse communities inhabiting productive kelp forests on shallow subtidal rocky reefs in southern California, USA. We combined long-term community surveys from 86 sites with detailed environmental data to determine what structures assemblages of fishes, invertebrates and algae at multiple spatial scales. We identified the spatial scales of variation in species composition using a hierarchical analysis based on eigenfunctions, and assessed how sea surface temperature (SST), water column chlorophyll, giant kelp biomass, wave exposure and potential propagule delivery strength contributed to community variation at each scale. Spatial effects occurring at multiple scales explained 60% of the variation in fish assemblages and 52% of the variation in the assemblages of invertebrates and algae. Most variation occurred over broad spatial scales (> 200 km) consistent with spatial heterogeneity in SST and potential propagule delivery strength, while the latter also explained community variation at medium scales (65-200 km). Small scale (1-65 km) co...Continue Reading

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Citations

Feb 16, 2021·Ecological Applications : a Publication of the Ecological Society of America·Andrew RassweilerKevin D Lafferty
Aug 3, 2021·Ecology Letters·Max C N CastoraniDaniel C Reed

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Software Mentioned

Regional Ocean Modeling System ( ROMS )
R Core Team
ncf
vegan
R
dbMEM
CDIP

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