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dc.contributor.author
Diodato, Soledad Lorena
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dc.contributor.author
Hoffmeyer, Monica Susana
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dc.date.available
2017-11-07T17:41:30Z
dc.date.issued
2008-10
dc.identifier.citation
Diodato, Soledad Lorena; Hoffmeyer, Monica Susana; Contribution of planktonic and detritic fractions to the natural diet of mesozooplankton in Bahía Blanca estuary; Springer; Hydrobiologia; 614; 1; 10-2008; 83-90
dc.identifier.issn
0018-8158
dc.identifier.uri
http://hdl.handle.net/11336/27749
dc.description.abstract
The relative importance of phytoplankton and microzooplankton in the natural diet of mesozooplankton was assessed in Bahía Blanca Estuary, Argentina, in December 2005. Grazing experiments were performed using 200-to-2,000 µm grazers and natural food <100 µm. Individual and community filtration and ingestion rates were estimated for each food fraction after 24 h incubation. Abundance and carbon data of prey and grazers were qualitatively and quantitatively analyzed. Phytoplankton was mainly composed of diatoms and microzooplankton mainly of tintinnids. Both fractions were less abundant than detritus. Most of the grazers belonged to the copepod Acartia tonsa. Mean filtration and ingestion rates on phytoplankton + microzooplankton were 6.44 ml grazer-1 day-1 and 0.03 µg C grazer-1 day-1, respectively. This figure increased to 6.95 ml grazer-1 day-1 and 1.65 µg C grazer-1 day-1 when detritus was included. Mean carbon-specific ingestion rates on phytoplankton and microzooplankton were 0.006 and 0.005 µg C µg C-1 day-1, respectively, whereas after the addition of detritus, the overall rate increased to 0.588 µg C µg C-1 day-1. Highly significant differences were found between grazing rates on detritus and planktonic fractions. Consumers showed higher filtration rates on microzooplankton than on phytoplankton although 78% of the cells ingested (54.7% µg C) came from the latter. The results point to a higher contribution of detritus to the natural diet of mesozooplankton in late spring. The omnivory of A. tonsa and the high turbidity of Bahía Blanca estuary may explain the differences observed among food fractions in terms of carbon intake.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Springer
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dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Grazing
dc.subject
Mesozooplankton
dc.subject
Phytoplankton
dc.subject
Microzooplankton
dc.subject
Detritus
dc.subject.classification
Meteorología y Ciencias Atmosféricas
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dc.subject.classification
Ciencias de la Tierra y relacionadas con el Medio Ambiente
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dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
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dc.title
Contribution of planktonic and detritic fractions to the natural diet of mesozooplankton in Bahía Blanca estuary
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2017-10-30T18:40:21Z
dc.journal.volume
614
dc.journal.number
1
dc.journal.pagination
83-90
dc.journal.pais
Alemania
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dc.journal.ciudad
Berlin
dc.description.fil
Fil: Diodato, Soledad Lorena. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina
dc.description.fil
Fil: Hoffmeyer, Monica Susana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto Argentino de Oceanografía. Universidad Nacional del Sur. Instituto Argentino de Oceanografía; Argentina. Universidad Tecnológica Nacional; Argentina
dc.journal.title
Hydrobiologia
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1007/s10750-008-9538-2
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://link.springer.com/article/10.1007%2Fs10750-008-9538-2
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