Biogeography of Radiolaria Polycystina (Protista) in the World Ocean

Analysis of 307 species of Radiolaria Polycystina in a worldwide dataset of 4774 plankton, sediment trap, and surface sediment samples allows recognizing six major biogeographic Domains. Five of them are circumglobal (Polar North, Polar South, Bi-Subpolar, Transitional and Tropical-Subtropical), and...

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Autores principales:	Boltovskoy, D., Correa, N.
Formato:	JOUR
Materias:	Oceanography Protozoa Sediments Dissolution rates Eastern equatorial Pacific Environmental variables Physical mechanism Planktonic foraminifera Sedimentary records Species distributions Surface sediments Population distribution biogeography community structure open ocean pelagic environment planktonic foraminifera population distribution protozoan radiolaria sediment trap surficial sediment warm water water column Pacific Ocean Pacific Ocean (East) Pacific Ocean (Equatorial) Foraminifera Polycystinea Protista Radiolaria (protozoans)
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_00796611_v149_n_p82_Boltovskoy
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	todo:paper_00796611_v149_n_p82_Boltovskoy
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spelling	todo:paper_00796611_v149_n_p82_Boltovskoy2023-10-03T14:54:28Z Biogeography of Radiolaria Polycystina (Protista) in the World Ocean Boltovskoy, D. Correa, N. Oceanography Protozoa Sediments Dissolution rates Eastern equatorial Pacific Environmental variables Physical mechanism Planktonic foraminifera Sedimentary records Species distributions Surface sediments Population distribution biogeography community structure open ocean pelagic environment planktonic foraminifera population distribution protozoan radiolaria sediment trap surficial sediment warm water water column Pacific Ocean Pacific Ocean (East) Pacific Ocean (Equatorial) Foraminifera Polycystinea Protista Radiolaria (protozoans) Analysis of 307 species of Radiolaria Polycystina in a worldwide dataset of 4774 plankton, sediment trap, and surface sediment samples allows recognizing six major biogeographic Domains. Five of them are circumglobal (Polar North, Polar South, Bi-Subpolar, Transitional and Tropical-Subtropical), and one is restricted to the Eastern Equatorial Pacific. Each Domain is characterized by a particular suite of species, all of which, however, occur widely, albeit sparsely, in one or more other Domains. Of the eight environmental variables evaluated, temperature correlates best with the partitions established. Species distributions in the water column and in the sediments are generally in agreement, but in the sediments cold water forms extend farther towards the equator than do warm water radiolarians towards the poles. In the Recent sedimentary record of planktonic Foraminifera the same phenomenon is magnified by the higher dissolution rates of warm water species, as compared with the cold water ones. Of the three major oceans, the Pacific was the most speciose, but estimates based on data corrected for sample-size show much smaller inter-oceanic differences, with ∼10 radiolarians probably being absent from either basin. The radiolarian biogeographic pattern is generally similar to those based on other planktonic and nektonic open-ocean organisms, but the degree of uniqueness of the Domains, as well as the position of the intervening boundaries, are variable, which reflects methodological differences, as well as taxon-specific traits. Partitions of the World Ocean defined on the basis of species ranges resemble the major divisions (presumably functionally homogeneous units) established on the basis of physical traits and chlorophyll fields, but secondary divisions nested within the latter are not reflected by any of the biogeographic schemes based on species distribution ranges. This conflict raises questions about the importance of several physical mechanisms for structuring pelagic communities, and/or on the coupling of structure and function in the pelagic realm. © 2016 Elsevier Ltd Fil:Boltovskoy, D. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Correa, N. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00796611_v149_n_p82_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	Oceanography Protozoa Sediments Dissolution rates Eastern equatorial Pacific Environmental variables Physical mechanism Planktonic foraminifera Sedimentary records Species distributions Surface sediments Population distribution biogeography community structure open ocean pelagic environment planktonic foraminifera population distribution protozoan radiolaria sediment trap surficial sediment warm water water column Pacific Ocean Pacific Ocean (East) Pacific Ocean (Equatorial) Foraminifera Polycystinea Protista Radiolaria (protozoans)
spellingShingle	Oceanography Protozoa Sediments Dissolution rates Eastern equatorial Pacific Environmental variables Physical mechanism Planktonic foraminifera Sedimentary records Species distributions Surface sediments Population distribution biogeography community structure open ocean pelagic environment planktonic foraminifera population distribution protozoan radiolaria sediment trap surficial sediment warm water water column Pacific Ocean Pacific Ocean (East) Pacific Ocean (Equatorial) Foraminifera Polycystinea Protista Radiolaria (protozoans) Boltovskoy, D. Correa, N. Biogeography of Radiolaria Polycystina (Protista) in the World Ocean
topic_facet	Oceanography Protozoa Sediments Dissolution rates Eastern equatorial Pacific Environmental variables Physical mechanism Planktonic foraminifera Sedimentary records Species distributions Surface sediments Population distribution biogeography community structure open ocean pelagic environment planktonic foraminifera population distribution protozoan radiolaria sediment trap surficial sediment warm water water column Pacific Ocean Pacific Ocean (East) Pacific Ocean (Equatorial) Foraminifera Polycystinea Protista Radiolaria (protozoans)
description	Analysis of 307 species of Radiolaria Polycystina in a worldwide dataset of 4774 plankton, sediment trap, and surface sediment samples allows recognizing six major biogeographic Domains. Five of them are circumglobal (Polar North, Polar South, Bi-Subpolar, Transitional and Tropical-Subtropical), and one is restricted to the Eastern Equatorial Pacific. Each Domain is characterized by a particular suite of species, all of which, however, occur widely, albeit sparsely, in one or more other Domains. Of the eight environmental variables evaluated, temperature correlates best with the partitions established. Species distributions in the water column and in the sediments are generally in agreement, but in the sediments cold water forms extend farther towards the equator than do warm water radiolarians towards the poles. In the Recent sedimentary record of planktonic Foraminifera the same phenomenon is magnified by the higher dissolution rates of warm water species, as compared with the cold water ones. Of the three major oceans, the Pacific was the most speciose, but estimates based on data corrected for sample-size show much smaller inter-oceanic differences, with ∼10 radiolarians probably being absent from either basin. The radiolarian biogeographic pattern is generally similar to those based on other planktonic and nektonic open-ocean organisms, but the degree of uniqueness of the Domains, as well as the position of the intervening boundaries, are variable, which reflects methodological differences, as well as taxon-specific traits. Partitions of the World Ocean defined on the basis of species ranges resemble the major divisions (presumably functionally homogeneous units) established on the basis of physical traits and chlorophyll fields, but secondary divisions nested within the latter are not reflected by any of the biogeographic schemes based on species distribution ranges. This conflict raises questions about the importance of several physical mechanisms for structuring pelagic communities, and/or on the coupling of structure and function in the pelagic realm. © 2016 Elsevier Ltd
format	JOUR
author	Boltovskoy, D. Correa, N.
author_facet	Boltovskoy, D. Correa, N.
author_sort	Boltovskoy, D.
title	Biogeography of Radiolaria Polycystina (Protista) in the World Ocean
title_short	Biogeography of Radiolaria Polycystina (Protista) in the World Ocean
title_full	Biogeography of Radiolaria Polycystina (Protista) in the World Ocean
title_fullStr	Biogeography of Radiolaria Polycystina (Protista) in the World Ocean
title_full_unstemmed	Biogeography of Radiolaria Polycystina (Protista) in the World Ocean
title_sort	biogeography of radiolaria polycystina (protista) in the world ocean
url	http://hdl.handle.net/20.500.12110/paper_00796611_v149_n_p82_Boltovskoy
work_keys_str_mv	AT boltovskoyd biogeographyofradiolariapolycystinaprotistaintheworldocean AT correan biogeographyofradiolariapolycystinaprotistaintheworldocean
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Biogeography of Radiolaria Polycystina (Protista) in the World Ocean

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