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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Distribution of planktonic cnidarians in response to South Atlantic Central Water intrusion in the South Brazilian Bight

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Author(s):
Nogueira Junior, Miodeli [1] ; Brandini, Frederico P. [2] ; Codina, Juan C. U. [1]
Total Authors: 3
Affiliation:
[1] Univ Fed Parana, Dept Zool, Programa Posgrad Zool, BR-81531980 Curitiba, Parana - Brazil
[2] Univ Sao Paulo, Inst Oceanog, BR-05508120 Sao Paulo - Brazil
Total Affiliations: 2
Document type: Journal article
Source: CONTINENTAL SHELF RESEARCH; v. 89, n. SI, p. 93-102, OCT 15 2014.
Web of Science Citations: 12
Abstract

Five oceanographic cruises were made between November 2005 and June 2006, sampling a cross-shelf transect off the South Brazilian Bight (SBB; 26 degrees 46'S) to follow the seasonal development of the South Atlantic Central Water (SACW) intrusion over the shelf and its influence on the assemblage of planktonic cnidarians. An onshore wind-driven bottom intrusion of the SACW was clearly perceptible, reaching the coast in January. From March onward, the SACW influence was gradually displaced seaward due to wind and tidal mixing. By late June the SACW influence was offshore and the inshore was dominated by low-salinity waters (<34.5). The abundance, distribution, and general taxonomic composition of both medusae and siphonophores were strongly influenced by the onshore intrusion of the SACW. An inshore-offshore gradient was clear. The Canonical Correspondence Analysis suggested that coastal species - dominated by Liriope tetraphylla, actinula larvae and Muggiaea kochi - were mostly related to food availability and a vertically mixed environment inshore, and their abundance and extent were reduced during intrusion periods. In contrast, species with offshore affinities tended to increase their abundance and distribution during intrusion periods, and were mostly related to the presence of thermal stratification and a deep chlorophyll maximum layer. Most of these offshore species, such as Aglaura hemistoma, Rhopalonema velatum and many calycophorans, are associated with the warm upper layer. However, high concentrations of large (> 20 mm in diameter) Solmaris corona were observed exclusively in cold waters, suggesting this medusa is a SACW indicator. (C) 2014 Elsevier Ltd. All rights reserved. (AU)

FAPESP's process: 11/09880-8 - Long-term flutuations (1963-2003) on the structure and abundance of gelatinous zooplankton (Cnidaria and Thaliacea) on South Brazilian Bight
Grantee:Miodeli Nogueira Junior
Support type: Scholarships in Brazil - Post-Doctorate