Paleoecological implications of radiolarian distribution and standing stocks versus accumulation rates in the Weddell Sea

In the Scotia and Weddell seas, polycystine radiolarians dwell chiefly at depths between 200 and 300 m, their vertical patterns being strongly associated with the higher temperatures characteristic of the Warm Deep Water. At scales of approximately 400 to 2000 km and ~30 days, radiolarian horizontal...

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Language:unknown
Published: 1992
Subjects:
Online Access:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_NIS19260_v56_n_p377_Boltovskoy
https://hdl.handle.net/20.500.12110/paper_NIS19260_v56_n_p377_Boltovskoy
id ftunibueairesbd:paper:paper_NIS19260_v56_n_p377_Boltovskoy
record_format openpolar
spelling ftunibueairesbd:paper:paper_NIS19260_v56_n_p377_Boltovskoy 2023-05-15T13:50:11+02:00 Paleoecological implications of radiolarian distribution and standing stocks versus accumulation rates in the Weddell Sea 1992 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_NIS19260_v56_n_p377_Boltovskoy https://hdl.handle.net/20.500.12110/paper_NIS19260_v56_n_p377_Boltovskoy unknown https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_NIS19260_v56_n_p377_Boltovskoy http://hdl.handle.net/20.500.12110/paper_NIS19260_v56_n_p377_Boltovskoy accumulation rates distribution palaeoecology radiolarian standing stocks Weddell Sea 1992 ftunibueairesbd https://doi.org/20.500.12110/paper_NIS19260_v56_n_p377_Boltovskoy 2023-02-16T02:23:33Z In the Scotia and Weddell seas, polycystine radiolarians dwell chiefly at depths between 200 and 300 m, their vertical patterns being strongly associated with the higher temperatures characteristic of the Warm Deep Water. At scales of approximately 400 to 2000 km and ~30 days, radiolarian horizontal quantitative distribution trends are not visibly affected by ice cover or primary production. On the other hand, comparison of polycystine standing stocks at 0 to 400 m versus their accumulation rates at 400 to 900 m indicates that >90% of the shells are lost to sedimentation. It is suggested that mechanical fragmentation by grazing (rather than dissolution) is primarily responsible for this loss. Deep habitat and high destruction rates in the water column are important factors which hinder the use of Antarctic polycystine thanatocoenoses for paleoecological reconstructions. -Authors Other/Unknown Material Antarc* Antarctic Weddell Sea Biblioteca Digital FCEN-UBA (Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires) Antarctic Weddell Weddell Sea
institution Open Polar
collection Biblioteca Digital FCEN-UBA (Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires)
op_collection_id ftunibueairesbd
language unknown
topic accumulation rates
distribution
palaeoecology
radiolarian
standing stocks
Weddell Sea
spellingShingle accumulation rates
distribution
palaeoecology
radiolarian
standing stocks
Weddell Sea
Paleoecological implications of radiolarian distribution and standing stocks versus accumulation rates in the Weddell Sea
topic_facet accumulation rates
distribution
palaeoecology
radiolarian
standing stocks
Weddell Sea
description In the Scotia and Weddell seas, polycystine radiolarians dwell chiefly at depths between 200 and 300 m, their vertical patterns being strongly associated with the higher temperatures characteristic of the Warm Deep Water. At scales of approximately 400 to 2000 km and ~30 days, radiolarian horizontal quantitative distribution trends are not visibly affected by ice cover or primary production. On the other hand, comparison of polycystine standing stocks at 0 to 400 m versus their accumulation rates at 400 to 900 m indicates that >90% of the shells are lost to sedimentation. It is suggested that mechanical fragmentation by grazing (rather than dissolution) is primarily responsible for this loss. Deep habitat and high destruction rates in the water column are important factors which hinder the use of Antarctic polycystine thanatocoenoses for paleoecological reconstructions. -Authors
title Paleoecological implications of radiolarian distribution and standing stocks versus accumulation rates in the Weddell Sea
title_short Paleoecological implications of radiolarian distribution and standing stocks versus accumulation rates in the Weddell Sea
title_full Paleoecological implications of radiolarian distribution and standing stocks versus accumulation rates in the Weddell Sea
title_fullStr Paleoecological implications of radiolarian distribution and standing stocks versus accumulation rates in the Weddell Sea
title_full_unstemmed Paleoecological implications of radiolarian distribution and standing stocks versus accumulation rates in the Weddell Sea
title_sort paleoecological implications of radiolarian distribution and standing stocks versus accumulation rates in the weddell sea
publishDate 1992
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_NIS19260_v56_n_p377_Boltovskoy
https://hdl.handle.net/20.500.12110/paper_NIS19260_v56_n_p377_Boltovskoy
geographic Antarctic
Weddell
Weddell Sea
geographic_facet Antarctic
Weddell
Weddell Sea
genre Antarc*
Antarctic
Weddell Sea
genre_facet Antarc*
Antarctic
Weddell Sea
op_relation https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_NIS19260_v56_n_p377_Boltovskoy
http://hdl.handle.net/20.500.12110/paper_NIS19260_v56_n_p377_Boltovskoy
op_doi https://doi.org/20.500.12110/paper_NIS19260_v56_n_p377_Boltovskoy
_version_ 1766253179108851712