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ID: 288870.0, MPI für Evolutionsbiologie / Ecophysiology
Alternate unstable states: Convergent paths of succession in hydrocarbon-seep tubeworm-associated communities
Authors:Cordes, Erik E.; Bergquist, Derk C.; Predmore, Benjamin L.; Jones, Chris; Deines, Peter; Telesnicki, Guy; Fisher, Charles R.
Date of Publication (YYYY-MM-DD):2006-12-12
Title of Journal:Journal of Experimental Marine Biology and Ecology
Issue / Number:2
Start Page:159
End Page:176
Review Status:not specified
Audience:Not Specified
Abstract / Description:Previous studies have shown clear, predictable successional trends in habitat characteristics and community structure in tubeworm aggregations at 3 similar hydrocarbon-seep sites on the central upper Louisiana slope of the Gulf of Mexico. In this study, we examine these trends in quantitative community collections from 7 additional hydrocarbon-seep sites widely distributed in the northern Gulf of Mexico. The relative proportions and sizes of Lamellibrachia luymesi and Seepiophila jonesi in tubeworm aggregations were similar at new and central sites, though S. jonesi dominated some collections from new sites, a situation not previously observed at central sites. In general, sulfide declined with increasing aggregation age (average size of tubeworms), but there was more variability in this trend at the new sites. Tubeworm-associated community composition was similar at new and central sites, with only a few rare species collected at the new sites for the first time. The most significant differences in the communities at new sites were the lower relative abundance of various gastropod species, and the absence of gastropods from collections made at the Viosca Knoll site. This community type was largely restricted to young aggregations at new sites that were more isolated from other tubeworm aggregations and consisted of higher proportions of S. jonesi. As succession proceeds from young to old aggregations, many of the previously described processes were apparent at the new sites including a reduction in biomass and a shift in trophic structure from endemic primary consumers to non-endemic higher order predators. Regardless of community composition in young aggregations, succession converges on similar late-stage community types.
Free Keywords:cold seep; deep sea; ecosystem engineering; Gulf of Mexico; hydrogen sulfide; vestimentiferan
External Publication Status:published
Document Type:Article
Affiliations:MPI für Limnologie/Abt. Ökophysiologie
External Affiliations:Biology Department, Pennsylvania State University, 208 Mueller Lab, University Park PA 16802, USA; Department of Organismic and Evolutionary Biology, Harvard University, 16 Divinity Ave., Cambridge, MA 02138, USA; Department of Zoology, University of Florida, 223 Bartram Hall, Gainesville FL 32611, USA
Identifiers:ISSN:0022-0981 [ID-No:1]
DOI:10.1016/j.jembe.2006.07.017 [ID-No:2]
LOCALID:2479/S 38509 [Listen-Nummer/S-Nummer]
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