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Description:
Author(s):
Schejter, L., Lopez Gappa, J., Silva Bremec, C.
Title:
Epibiotic relationships on Zygochlamys patagonica (Mollusca, Bivalvia, Pectinidae) increase biodiversity in a submarine canyon in Argentina
Publication Date:
2014
Journal Title:
Deep Sea Research Part II: Topical Studies in Oceanography
Volume:
104
Page(s):
252-258
Abstract:
"The continental slope of the southern SW Atlantic Ocean has many distinguishable deep submarine canyons, varying in depth and extension. The benthic fauna within one of them, detected in April 2005 by means of a multibeam SIMRAD EM1002 sonar, and located at 4335'S to 5933'W, 325 m depth, was studied to discuss faunal affinities with the neighbouring Patagonian scallop fishing grounds located at upper slope depths. In order to add faunal information to the previous general study, we studied the epibiotic species settled on Patagonian scallops (the dominant species in the area) collected in the reference sampling site using a 2.5-m mouth-opening dredge, 10 mm mesh size. We sampled 103 scallops with shell heights between 22 and 69 mm; epibionts were recorded on both valves. We found 53 epibiotic taxa, which were most conspicuous on the upper valve. Bryozoa was the most diverse group (34 species) while Polychaeta was the most abundant group, recorded on 94% of the scallops. Stylasteridae (2 species) and Clavulariidae (Cnidaria) conform newly recorded epibionts on Z. patagonica and the sponge Tedania (Tedaniopsis) infundibuliformis also represents a new record for the SW Atlantic Ocean."
Keywords:
Submarine canyon; Epibiotic associations; Biodiversity; Zygochlamys patagonica; SW Atlantic Ocean; Species richness; Bryozoa; Polychaeta
Electronic DOI:
Notes:
Funding was provided by the INIDEP, CONICET, (PICT 2007 02200, PICT 2008-1119 and PIP 2010-2012 0291), a grant from the Inter American Institute for Global Change Research (IAI) (CRN 3070), and by the U.S. National Science Foundation (grant GEO-1128040)
Cross Reference:
Presented at the 1st International Symposium on Submarine Canyons (INCISE 1), held at IFREMER, Brest, France, Summer 2012
Funding Organizations:
INIDEP
CONICET
Inter American Institute for Global Change Research
U.S. National Science Foundation
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