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Influence of sediment characteristics on the composition of soft-sediment intertidal communities in the northern Gulf of Mexico

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  • Benthic infaunal communities are important components of coastal ecosystems. Understanding the relationships between the structure of these communities and characteristics of the habitat in which they live is becoming progressively more important as coastal systems face increasing stress from anthropogenic impacts and changes in climate. To examine how sediment characteristics and infaunal community composition were related along the northern Gulf of Mexico coast, we sampled intertidal infaunal communities at seven sites covering common habitat types at a regional scale. Across 69 samples, the communities clustered into four distinct groups on the basis of faunal composition. Nearly 70% of the variation in the composition of the communities was explained by salinity, median grain size, and total organic content. Our results suggest that at a regional level coarse habitat characteristics are able to explain a large amount of the variation among sites in infaunal community structure. By examining the relationships between infaunal communities and their sedimentary habitats, we take a necessary first step that will allow the exploration of how changes in habitat and community composition influence higher trophic levels and ecosystem scale processes.
  • This is the publisher’s final pdf. The published article is copyrighted by the author(s) and published by PeerJ. The published article can be found at: https://peerj.com/.
  • Keywords: Estuary, Habitat, Animal-sediment relationships, Community composition, Coastal ecology
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  • Coblentz, K. E., Henkel, J. R., Sigel, B. J., & Taylor, C. M. (2015). Influence of sediment characteristics on the composition of soft-sediment intertidal communities in the northern Gulf of Mexico. PeerJ, 3, e1014. doi:10.7717/peerj.1014
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  • Funding for this study was provided by the National Science Foundation (Award DEB-1060350, PIs Taylor and Sherry), an NSF REU Supplement (DEB 1112670), a Louisiana Sea Grant Undergraduate Research Opportunities Program award (PI Coblentz), and a Tulane Center for Engaged Learning and Teaching award (PIs Coblentz and Taylor).
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