Abundance trends and ecology of planktonic ciliates of the south-western Atlantic (35-63°S): A comparison between neritic and oceanic environments

Mostrar todas las versiones(3)

Ciliates from sub-surface waters of the Argentine shelf and the Drake Passage under austral summer and autumn conditions were examined and compared for the first time. In both environments, the taxonomic structure of ciliates was related to temperature and salinity, and aloricate oligotrichs dominat...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autores principales: Santoferrara, L., Alder, V.
Formato: JOUR
Materias:
abundance
biomass
chlorophyll a
ciliate
community structure
comparative study
ecology
growth rate
salinity
sea surface temperature
seasonal variation
subtidal environment
taxonomy
temperature effect
Argentine Shelf
Atlantic Ocean
Drake Passage
Ciliophora
Myrionecta rubra
oligotrichs
Prostomatida
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_01427873_v31_n8_p837_Santoferrara
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_01427873_v31_n8_p837_Santoferrara
record_format dspace
spelling todo:paper_01427873_v31_n8_p837_Santoferrara2023-10-03T14:59:00Z Abundance trends and ecology of planktonic ciliates of the south-western Atlantic (35-63°S): A comparison between neritic and oceanic environments Santoferrara, L. Alder, V. abundance biomass chlorophyll a ciliate community structure comparative study ecology growth rate salinity sea surface temperature seasonal variation subtidal environment taxonomy temperature effect Argentine Shelf Atlantic Ocean Drake Passage Ciliophora Myrionecta rubra oligotrichs Prostomatida Ciliates from sub-surface waters of the Argentine shelf and the Drake Passage under austral summer and autumn conditions were examined and compared for the first time. In both environments, the taxonomic structure of ciliates was related to temperature and salinity, and aloricate oligotrichs dominated in density (80%) over loricate oligotrichs, litostomatids and prostomatids, while the microplanktonic fraction prevailed in terms of biomass (90%) over the nanociliates. Myrionecta rubra was found all along the Argentine shelf only in autumn, but showed isolated peaks of abundance (103 ind. L -1) during summer. Mean values of density and biomass of total ciliates decreased ca. 2-fold from the shelf-slope to oceanic waters, while potential maximum production of aloricate oligotrichs decreased 9-fold, in relation with the drop in chlorophyll a concentration and the latitudinal decline of temperature, also reflected in maximum growth rates. Fifty percent of total ciliate abundance was represented by local increases (maximum: 20 000 ind. L-1 and 25 μg C L-1), which were spatially superimposed with ranges of seawater temperature and chlorophyll a concentrations of 10-15°C and 0.6-6 μg L-1, respectively, and were found in the nearby of fronts located on the shelf and the slope. Fil:Santoferrara, L. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Alder, V. 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_01427873_v31_n8_p837_Santoferrara
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic abundance
biomass
chlorophyll a
ciliate
community structure
comparative study
ecology
growth rate
salinity
sea surface temperature
seasonal variation
subtidal environment
taxonomy
temperature effect
Argentine Shelf
Atlantic Ocean
Drake Passage
Ciliophora
Myrionecta rubra
oligotrichs
Prostomatida
spellingShingle abundance
biomass
chlorophyll a
ciliate
community structure
comparative study
ecology
growth rate
salinity
sea surface temperature
seasonal variation
subtidal environment
taxonomy
temperature effect
Argentine Shelf
Atlantic Ocean
Drake Passage
Ciliophora
Myrionecta rubra
oligotrichs
Prostomatida
Santoferrara, L.
Alder, V.
Abundance trends and ecology of planktonic ciliates of the south-western Atlantic (35-63°S): A comparison between neritic and oceanic environments
topic_facet abundance
biomass
chlorophyll a
ciliate
community structure
comparative study
ecology
growth rate
salinity
sea surface temperature
seasonal variation
subtidal environment
taxonomy
temperature effect
Argentine Shelf
Atlantic Ocean
Drake Passage
Ciliophora
Myrionecta rubra
oligotrichs
Prostomatida
description Ciliates from sub-surface waters of the Argentine shelf and the Drake Passage under austral summer and autumn conditions were examined and compared for the first time. In both environments, the taxonomic structure of ciliates was related to temperature and salinity, and aloricate oligotrichs dominated in density (80%) over loricate oligotrichs, litostomatids and prostomatids, while the microplanktonic fraction prevailed in terms of biomass (90%) over the nanociliates. Myrionecta rubra was found all along the Argentine shelf only in autumn, but showed isolated peaks of abundance (103 ind. L -1) during summer. Mean values of density and biomass of total ciliates decreased ca. 2-fold from the shelf-slope to oceanic waters, while potential maximum production of aloricate oligotrichs decreased 9-fold, in relation with the drop in chlorophyll a concentration and the latitudinal decline of temperature, also reflected in maximum growth rates. Fifty percent of total ciliate abundance was represented by local increases (maximum: 20 000 ind. L-1 and 25 μg C L-1), which were spatially superimposed with ranges of seawater temperature and chlorophyll a concentrations of 10-15°C and 0.6-6 μg L-1, respectively, and were found in the nearby of fronts located on the shelf and the slope.
format JOUR
author Santoferrara, L.
Alder, V.
author_facet Santoferrara, L.
Alder, V.
author_sort Santoferrara, L.
title Abundance trends and ecology of planktonic ciliates of the south-western Atlantic (35-63°S): A comparison between neritic and oceanic environments
title_short Abundance trends and ecology of planktonic ciliates of the south-western Atlantic (35-63°S): A comparison between neritic and oceanic environments
title_full Abundance trends and ecology of planktonic ciliates of the south-western Atlantic (35-63°S): A comparison between neritic and oceanic environments
title_fullStr Abundance trends and ecology of planktonic ciliates of the south-western Atlantic (35-63°S): A comparison between neritic and oceanic environments
title_full_unstemmed Abundance trends and ecology of planktonic ciliates of the south-western Atlantic (35-63°S): A comparison between neritic and oceanic environments
title_sort abundance trends and ecology of planktonic ciliates of the south-western atlantic (35-63°s): a comparison between neritic and oceanic environments
url http://hdl.handle.net/20.500.12110/paper_01427873_v31_n8_p837_Santoferrara
work_keys_str_mv AT santoferraral abundancetrendsandecologyofplanktonicciliatesofthesouthwesternatlantic3563sacomparisonbetweenneriticandoceanicenvironments
AT alderv abundancetrendsandecologyofplanktonicciliatesofthesouthwesternatlantic3563sacomparisonbetweenneriticandoceanicenvironments
_version_ 1782025686632890368

Ejemplares similares