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Abstract:

The relative importance of small forms of copepods has been historically underestimated by the traditional use of 200-300-μm mesh nets. This work quantified the distribution and abundance of copepods, considering two size fractions (<300 μm and >300 μm), in superficial waters (9 m deep) of the Drake Passage and contributed to the knowledge of their interannual fluctuations among three summers. Four types of nauplii and eleven species of copepods at copepodite and adult stages were identified, with abundance values of up to 13 ind L -1 and 28,300 μg C m -3. The <300-μm fraction, composed of Oithona similis, small cyclopoids and nauplii, dominated the copepod communities in the 3 years; it accounted for more than 77% of the total number and for between 40 and 63% of the total biomass. Changes in density and biomass values among the three cruises differed according to copepod size fraction and water mass; the >300-μm fraction showed no changes among the 3 years, both in Antarctic (density and biomass) and in Subantarctic waters (density), whereas the <300-μm fraction showed higher (density and biomass) values in 2001 both in Subantarctic and in Antarctic waters. Sea surface temperature and its anomaly accounted for the largest proportion of variability in copepod density and biomass, particularly for the <300-μm fraction. © 2011 Springer-Verlag and AWI.

Registro:

Documento: Artículo
Título:Interannual fluctuations in copepod abundance and contribution of small forms in the Drake Passage during austral summer
Autor:Thompson, G.A.; Dinofrio, E.O.; Alder, V.A.
Filiación:Departamento de Ecología, Genetica y Evolucion, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria Pab. II., Buenos Aires, Argentina
Consejo Nacional de Investigaciones Científicas y Técnicas, Rivadavia 1917, Buenos Aires, Argentina
Instituto Antártico Argentino, Cerrito 1248, Buenos Aires, Argentina
Palabras clave:Biomass; Copepods; Density; Drake Passage; Interannual fluctuations; abundance; annual variation; biomass; community composition; crustacean; dominance; sea surface temperature; summer; water mass; Drake Passage; Southern Ocean; Copepoda; Cyclopoida; Oithona similis
Año:2012
Volumen:66
Número:2
Página de inicio:127
Página de fin:138
DOI: http://dx.doi.org/10.1007/s10152-011-0253-4
Título revista:Helgoland Marine Research
Título revista abreviado:Helgol. Mar. Res.
ISSN:1438387X
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_1438387X_v66_n2_p127_Thompson

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Citas:

---------- APA ----------
Thompson, G.A., Dinofrio, E.O. & Alder, V.A. (2012) . Interannual fluctuations in copepod abundance and contribution of small forms in the Drake Passage during austral summer. Helgoland Marine Research, 66(2), 127-138.
http://dx.doi.org/10.1007/s10152-011-0253-4
---------- CHICAGO ----------
Thompson, G.A., Dinofrio, E.O., Alder, V.A. "Interannual fluctuations in copepod abundance and contribution of small forms in the Drake Passage during austral summer" . Helgoland Marine Research 66, no. 2 (2012) : 127-138.
http://dx.doi.org/10.1007/s10152-011-0253-4
---------- MLA ----------
Thompson, G.A., Dinofrio, E.O., Alder, V.A. "Interannual fluctuations in copepod abundance and contribution of small forms in the Drake Passage during austral summer" . Helgoland Marine Research, vol. 66, no. 2, 2012, pp. 127-138.
http://dx.doi.org/10.1007/s10152-011-0253-4
---------- VANCOUVER ----------
Thompson, G.A., Dinofrio, E.O., Alder, V.A. Interannual fluctuations in copepod abundance and contribution of small forms in the Drake Passage during austral summer. Helgol. Mar. Res. 2012;66(2):127-138.
http://dx.doi.org/10.1007/s10152-011-0253-4