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Abstract:

Ciliates from sub-surface waters of the Argentine shelf and the Drake Passage under austral summer and autumn conditions were examined and compared for the first time. In both environments, the taxonomic structure of ciliates was related to temperature and salinity, and aloricate oligotrichs dominated in density (80%) over loricate oligotrichs, litostomatids and prostomatids, while the microplanktonic fraction prevailed in terms of biomass (90%) over the nanociliates. Myrionecta rubra was found all along the Argentine shelf only in autumn, but showed isolated peaks of abundance (103 ind. L -1) during summer. Mean values of density and biomass of total ciliates decreased ca. 2-fold from the shelf-slope to oceanic waters, while potential maximum production of aloricate oligotrichs decreased 9-fold, in relation with the drop in chlorophyll a concentration and the latitudinal decline of temperature, also reflected in maximum growth rates. Fifty percent of total ciliate abundance was represented by local increases (maximum: 20 000 ind. L-1 and 25 μg C L-1), which were spatially superimposed with ranges of seawater temperature and chlorophyll a concentrations of 10-15°C and 0.6-6 μg L-1, respectively, and were found in the nearby of fronts located on the shelf and the slope.

Registro:

Documento: Artículo
Título:Abundance trends and ecology of planktonic ciliates of the south-western Atlantic (35-63°S): A comparison between neritic and oceanic environments
Autor:Santoferrara, L.; Alder, V.
Filiación:Consejo Nacional de Investigaciones, Científicas y Técnicas, Av. Rivadavia 1917, C1033AAJ, Buenos Aires, Argentina
Departamento de Ecología, Genética y Evolución, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, C1428EHA Buenos Aires, Argentina
Instituto Antártico Argentino, Cerrito 1248, C1010AAZ Buenos Aires, Argentina
Palabras clave:abundance; biomass; chlorophyll a; ciliate; community structure; comparative study; ecology; growth rate; salinity; sea surface temperature; seasonal variation; subtidal environment; taxonomy; temperature effect; Argentine Shelf; Atlantic Ocean; Drake Passage; Ciliophora; Myrionecta rubra; oligotrichs; Prostomatida
Año:2009
Volumen:31
Número:8
Página de inicio:837
Página de fin:851
DOI: http://dx.doi.org/10.1093/plankt/fbp033
Título revista:Journal of Plankton Research
Título revista abreviado:J. Plankton Res.
ISSN:01427873
CODEN:JPLRD
PDF:https://bibliotecadigital.exactas.uba.ar/download/paper/paper_01427873_v31_n8_p837_Santoferrara.pdf
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01427873_v31_n8_p837_Santoferrara

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Citas:

---------- APA ----------
Santoferrara, L. & Alder, V. (2009) . Abundance trends and ecology of planktonic ciliates of the south-western Atlantic (35-63°S): A comparison between neritic and oceanic environments. Journal of Plankton Research, 31(8), 837-851.
http://dx.doi.org/10.1093/plankt/fbp033
---------- CHICAGO ----------
Santoferrara, L., Alder, V. "Abundance trends and ecology of planktonic ciliates of the south-western Atlantic (35-63°S): A comparison between neritic and oceanic environments" . Journal of Plankton Research 31, no. 8 (2009) : 837-851.
http://dx.doi.org/10.1093/plankt/fbp033
---------- MLA ----------
Santoferrara, L., Alder, V. "Abundance trends and ecology of planktonic ciliates of the south-western Atlantic (35-63°S): A comparison between neritic and oceanic environments" . Journal of Plankton Research, vol. 31, no. 8, 2009, pp. 837-851.
http://dx.doi.org/10.1093/plankt/fbp033
---------- VANCOUVER ----------
Santoferrara, L., Alder, V. Abundance trends and ecology of planktonic ciliates of the south-western Atlantic (35-63°S): A comparison between neritic and oceanic environments. J. Plankton Res. 2009;31(8):837-851.
http://dx.doi.org/10.1093/plankt/fbp033