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Complex depth-related patterns in taxonomic and functional diversity of polychaetes in the Gulf of Mexico
Carvalho, R.; Wei, C.-L.; Rowe, G.; Schulze, A. (2013). Complex depth-related patterns in taxonomic and functional diversity of polychaetes in the Gulf of Mexico. Deep-Sea Res., Part 1, Oceanogr. Res. Pap. 80: 66-77. dx.doi.org/10.1016/j.dsr.2013.07.002
In: Deep-Sea Research, Part I. Oceanographic Research Papers. Elsevier: Oxford. ISSN 0967-0637, more
Peer reviewed article  

Available in Authors 

Keywords
    Polychaeta [WoRMS]; Marine
Author keywords
    Gulf of Mexico; Deep-sea; Community structure; Functional diversity;Polychaete; Feeding guilds; Benthic communities

Authors  Top 
  • Carvalho, R.
  • Wei, C.-L.
  • Rowe, G.
  • Schulze, A.

Abstract
    Patterns of taxonomic and functional diversity in polychaete assemblages were examined in the deep northern Gulf of Mexico, including the first analysis of polychaete feeding guild distribution. An analysis of samples from a total of 51 stations located along 7 transects plus additional nearby sites, indicated that density decreased exponentially with depth, with the central locations having higher densities than the eastern and western regions. Alpha diversity was also highest at the central stations associated with the Mississippi trough. The samples can be grouped into three significant clusters based on thirty percent similarity of species composition. BIO-ENV indicated depth, sediment particle size, and export POC were most important variables explaining distributions. The diversity of polychaete feeding guilds was high in the Mississippi trough, upper and mid-slope regions but declined to a few guilds on the Sigsbee abyssal plain. Combining feeding guild analysis with traditional analysis of species diversity contributes to a clearer understanding of trophic diversity in deep-sea benthic assemblages.

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