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...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Boltovskoy, D., Alder, V.A.
Formato:	JOUR
Materias:	accumulation rates distribution palaeoecology radiolarian standing stocks Weddell Sea
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_NIS19260_v56_n_p377_Boltovskoy
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	todo:paper_NIS19260_v56_n_p377_Boltovskoy
record_format	dspace
spelling	todo:paper_NIS19260_v56_n_p377_Boltovskoy2023-10-03T16:46:16Z Paleoecological implications of radiolarian distribution and standing stocks versus accumulation rates in the Weddell Sea Boltovskoy, D. Alder, V.A. accumulation rates distribution palaeoecology radiolarian standing stocks 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 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 JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_NIS19260_v56_n_p377_Boltovskoy
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	accumulation rates distribution palaeoecology radiolarian standing stocks Weddell Sea
spellingShingle	accumulation rates distribution palaeoecology radiolarian standing stocks Weddell Sea Boltovskoy, D. Alder, V.A. 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
format	JOUR
author	Boltovskoy, D. Alder, V.A.
author_facet	Boltovskoy, D. Alder, V.A.
author_sort	Boltovskoy, D.
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
url	http://hdl.handle.net/20.500.12110/paper_NIS19260_v56_n_p377_Boltovskoy
work_keys_str_mv	AT boltovskoyd paleoecologicalimplicationsofradiolariandistributionandstandingstocksversusaccumulationratesintheweddellsea AT alderva paleoecologicalimplicationsofradiolariandistributionandstandingstocksversusaccumulationratesintheweddellsea
_version_	1807320155628240896

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

Ejemplares similares