Biological characteristics of a hydrothermal edifice mosaic community

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dc.contributor.authorSarrazin, J.
dc.contributor.authorJuniper, S. Kim
dc.date.accessioned2021-07-18T16:16:34Z
dc.date.available2021-07-18T16:16:34Z
dc.date.copyright1999en_US
dc.date.issued1999
dc.description.abstractstudy defines the composition and biomass charactenstics of 5 of 6 previously described faunal assemblages that form a mosaic community on hydrothermal sulfide edifices of the Juan de Fuca Ridge (northeast Pacific). Quantitative samples of each assemblage were acquired during 'ROPOS' Remote Operated Vehicle (ROV) dive programs in 1994 and 1996. Total abundance, and species nchness, as well as wet and dry weights, were calculated for each assemblage, and sampled surface area was measured directly or from scaled images of sample scars. These data were used to compare species composition, nchness and biomass of the distinct assemblages and to estimate total biomass of a sulfide edifice. In addition to major compositional differences. we observed an increase in density, biomass and species richness along a proposed successional sequence from the Paralvinella suifincola (annelid polychaete) assemblage (Assemblage I) to the low-flow Ridgeia piscesae (vestimentifera) community (Assemblage V-LF). Biomass (dry weight without vestimentiferan tubes) of the different sampled assemblages ranged from 0.011 kg m-2 for Assemblage I to 4.68 kg m-2 for Assemblage V-LF and 2.33 kg m-2 for the rarer high-flow Ridgeia pjscesae community (V-HF). Resulting quantitative information was used to refine a previous model of community succession. Comparisons with other manne ecosystems showed that the biomass of these and other hydrothermal assemblages dominated by symbiont-bearing organisms (vestimentifera, bivalvia) is sirnilar to those found in the most productive photosynthetically based assemblages. Tubeworm growth and sulfide accretion greatly increase total surface area available to vent organisms, and may attenuate competition for space. The 3-dimensional habitat formed by Ridgeia piscesae tubes may influence species distribution and enhance species nchness. The tube worm assemblages comprise the major and probably the most stable component of total edifice biomass. At one site, over a 4 yr period, there was substantial environmental change and major shifts in coverage by other assemblages but relatively little change in total coverage by R. piscesae. As a result total edifice biomass (219 to 251 kg dry weight) varied by only 16 % over 1 to 3 yr intervals. Considerable quantitative ecological information can be derived from analyses of submersible-collected imagery, with sampling serving pnmanly as a ground truthing tool. Limitations of sampling and surface area determinations are considered.en_US
dc.description.reviewstatusRevieweden_US
dc.description.scholarlevelFacultyen_US
dc.description.sponsorshipThis work would not have been possible without the field support of the pilots of ROPOS and the crews of the CSS 'John P. Tully' and the 'Thomas G. Thompson'. This research was sponsored by NSERC Canada, Fisheries and Oceans Canada and the National Science Foundation. J.S. was supported by post-graduate followships from NSERC (Canada), FCAR (Quebec) and GEOTOP (UQAM). We are particularly grateful to C.White, M. Toure, K. Rohrbach, B. Claiborne, J. Oubraham, C. Levasque, D. Grelon and D. Puchault, who kindly helped in sorting and measuring organisms. Thanks also to J.-C. Marechal for his help with geometric calculations. We thank 4 anonymous reviewers for their constructive comments, and Dr. Verena Tunnicliffe for many productive conversations during the preparation of this manuscript.en_US
dc.identifier.citationSarrazin, J. & Juniper, S.K. (1999). Biological characteristics of a hydrothermal edifice mosaic community, Marine Ecology Progress Series, 185. http://doi.org/10.3354/meps185001en_US
dc.identifier.urihttp://doi.org/10.3354/meps185001
dc.identifier.urihttp://hdl.handle.net/1828/13122
dc.language.isoenen_US
dc.publisherMarine Ecology Progress Seriesen_US
dc.subjectVent ecologyen_US
dc.subjectBiomassen_US
dc.subjectFaunal successionen_US
dc.subjectSulfide edificeen_US
dc.subjectAssemblage characteristicsen_US
dc.subjectImage analysisen_US
dc.subjectJuan de Fuca Ridgeen_US
dc.subjectEcological modelen_US
dc.subjectMarine ecosystem biomassen_US
dc.titleBiological characteristics of a hydrothermal edifice mosaic communityen_US
dc.typeArticleen_US

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