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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.)

Spatial and temporal variation of planktonic cnidarian density in subtropical waters of the Southern Brazilian Bight

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Nagata, Renato Mitsuo [1] ; Nogueira Junior, Miodeli [2] ; Brandini, Frederico Pereira [3] ; Haddad, Maria Angelica [4]
Total Authors: 4
[1] Univ Sao Paulo, Inst Biociencias, BR-05508090 Sao Paulo - Brazil
[2] Univ Fed Paraiba, Dept Sistemat & Ecol, BR-58051900 Joao Pessoa, Paraiba - Brazil
[3] Univ Sao Paulo, Inst Oceanog, Dept Oceanog Biol, BR-05508120 Sao Paulo - Brazil
[4] Univ Fed Parana, Dept Zool, Programa Posgrad Zool, Ctr Politecn, BR-81531990 Curitiba, Parana - Brazil
Total Affiliations: 4
Document type: Journal article
Source: Journal of the Marine Biological Association of the United Kingdom; v. 94, n. 7, p. 1387-1400, NOV 2014.
Web of Science Citations: 9

The spatial and temporal variations of planktonic cnidarians were studied across the inner continental shelf (<= 40 m) off the State of Parana in southern Brazil. Monthly zooplankton samples were taken between November 1997 and March 1999 at five stations. The holoplanktonic Liriope tetraphylla and Muggiaea kochi dominated during the entire period, comprising >80% of the specimens. The coast-ocean gradient became evident due to a near-coastal (<= 20 m) assemblage formed by L. tetraphylla, Solmaris corona and meroplanktonic medusae, and a distinct outer (25-40 m) assemblage formed by the medusae Corymorpha gracilis and Aglaura hemistoma and siphonophores. The estuarine runoff during warm rainy periods lowered the salinity (similar to 30) at the inner stations (1, 2 and 3), providing appropriate conditions for the estuarine/coastal species. Wind-driven onshore advection of outer-shelf species to the inner isobaths occurred from late autumn to winter, when the rainfall decreased and salinity increased (>35). Population peaks occurred in both summer and winter at the inner stations. For most species, the seasonal patterns were inconsistent with other studies conducted in the Southern Brazilian Bight, suggesting irregular and unpredictable seasonal distributions of abundance. Whereas in high-latitude ecosystems the dynamics of cnidarian populations follows the seasonal productivity cycle, here, complex hydrographic processes seem to be more important in determining the structure and seasonal dynamics of this community. (AU)

FAPESP's process: 11/00436-8 - Morphofunctional bases of feeding and the trophic role of Lychnorhiza lucerna (Scyphozoa, Rhizostomeae)
Grantee:Renato Mitsuo Nagata
Support type: Scholarships in Brazil - Doctorate
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