First record of a brackish radiolarian (Polycystina): Lophophaena rioplatensis n. sp. in the Río de la Plata estuary

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Vertically stratified bottle plankton samples collected in the Río de La Plata estuary (Atlantic coast of South America at ∼35° S) and in coastal waters off Mar del Plata (∼38° S) in December 1999 and November 2001 yielded up to 394 live cells l-1 of a single new nassellarian species: Lophophaena ri...

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Autores principales: Boltovskoy, D., Kogan, M., Alder, V.A., Mianzan, H.
Formato: Artículo publishedVersion
Lenguaje:Inglés
Publicado: 2003
Materias:
estuary
geographical distribution
new record
new species
radiolaria
taxonomy
Rio de la Plata
South America
Nassellaria
Polycystinea
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_01427873_v25_n12_p1551_Boltovskoy
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paperaa:paper_01427873_v25_n12_p1551_Boltovskoy
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spelling paperaa:paper_01427873_v25_n12_p1551_Boltovskoy2023-06-12T16:46:38Z First record of a brackish radiolarian (Polycystina): Lophophaena rioplatensis n. sp. in the Río de la Plata estuary J. Plankton Res. 2003;25(12):1551-1559 Boltovskoy, D. Kogan, M. Alder, V.A. Mianzan, H. estuary geographical distribution new record new species radiolaria taxonomy Rio de la Plata South America Nassellaria Polycystinea Vertically stratified bottle plankton samples collected in the Río de La Plata estuary (Atlantic coast of South America at ∼35° S) and in coastal waters off Mar del Plata (∼38° S) in December 1999 and November 2001 yielded up to 394 live cells l-1 of a single new nassellarian species: Lophophaena rioplatensis n. sp. (family Plagoniidae). In estuarine waters, the species was recorded at salinities as low as 15.4 p.s.u.; densities in excess of 100 cells l-1 were found at salinities ranging from 16. 9 p.s.u. These extremely high concentrations (the highest ever reported in the literature), as well as the fact that >90% of the individuals recorded contain cytoplasm, indicate that these are self-sustaining populations which thrive in the estuary (and in nearshore coastal waters), probably due to plentiful dissolved silica and an abundant food supply. Lophophaena rioplatensis is the first polycystine brackish-water species described. This finding shows that radiolarian fossils are not unequivocally associated with open-ocean conditions, but may also be useful indicators of coastal and brackish estuarine paleoenvironments. Fil:Boltovskoy, D. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Kogan, M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Alder, V.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2003 info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion application/pdf eng info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_01427873_v25_n12_p1551_Boltovskoy
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
language Inglés
orig_language_str_mv eng
topic estuary
geographical distribution
new record
new species
radiolaria
taxonomy
Rio de la Plata
South America
Nassellaria
Polycystinea
spellingShingle estuary
geographical distribution
new record
new species
radiolaria
taxonomy
Rio de la Plata
South America
Nassellaria
Polycystinea
Boltovskoy, D.
Kogan, M.
Alder, V.A.
Mianzan, H.
First record of a brackish radiolarian (Polycystina): Lophophaena rioplatensis n. sp. in the Río de la Plata estuary
topic_facet estuary
geographical distribution
new record
new species
radiolaria
taxonomy
Rio de la Plata
South America
Nassellaria
Polycystinea
description Vertically stratified bottle plankton samples collected in the Río de La Plata estuary (Atlantic coast of South America at ∼35° S) and in coastal waters off Mar del Plata (∼38° S) in December 1999 and November 2001 yielded up to 394 live cells l-1 of a single new nassellarian species: Lophophaena rioplatensis n. sp. (family Plagoniidae). In estuarine waters, the species was recorded at salinities as low as 15.4 p.s.u.; densities in excess of 100 cells l-1 were found at salinities ranging from 16. 9 p.s.u. These extremely high concentrations (the highest ever reported in the literature), as well as the fact that >90% of the individuals recorded contain cytoplasm, indicate that these are self-sustaining populations which thrive in the estuary (and in nearshore coastal waters), probably due to plentiful dissolved silica and an abundant food supply. Lophophaena rioplatensis is the first polycystine brackish-water species described. This finding shows that radiolarian fossils are not unequivocally associated with open-ocean conditions, but may also be useful indicators of coastal and brackish estuarine paleoenvironments.
format Artículo
Artículo
publishedVersion
author Boltovskoy, D.
Kogan, M.
Alder, V.A.
Mianzan, H.
author_facet Boltovskoy, D.
Kogan, M.
Alder, V.A.
Mianzan, H.
author_sort Boltovskoy, D.
title First record of a brackish radiolarian (Polycystina): Lophophaena rioplatensis n. sp. in the Río de la Plata estuary
title_short First record of a brackish radiolarian (Polycystina): Lophophaena rioplatensis n. sp. in the Río de la Plata estuary
title_full First record of a brackish radiolarian (Polycystina): Lophophaena rioplatensis n. sp. in the Río de la Plata estuary
title_fullStr First record of a brackish radiolarian (Polycystina): Lophophaena rioplatensis n. sp. in the Río de la Plata estuary
title_full_unstemmed First record of a brackish radiolarian (Polycystina): Lophophaena rioplatensis n. sp. in the Río de la Plata estuary
title_sort first record of a brackish radiolarian (polycystina): lophophaena rioplatensis n. sp. in the río de la plata estuary
publishDate 2003
url http://hdl.handle.net/20.500.12110/paper_01427873_v25_n12_p1551_Boltovskoy
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AT alderva firstrecordofabrackishradiolarianpolycystinalophophaenarioplatensisnspintheriodelaplataestuary
AT mianzanh firstrecordofabrackishradiolarianpolycystinalophophaenarioplatensisnspintheriodelaplataestuary
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