Biomass of nanoprotozooplankton in the Atlantic sector of the Southern Ocean
The dynamic of early spring nanoprotozoa was investigated in three characteristic water masses of the Southern Ocean: the Marginal Ice Zone, the intermediate waters of the Antarctic Circumpolar Current and the Polar Frontal Zone. Biomass and feeding activities of nanoprotozoa were measured, as well...
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1997
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.736976 2024-09-15T17:41:33+00:00 Biomass of nanoprotozooplankton in the Atlantic sector of the Southern Ocean Becquevort, Sylvie MEDIAN LATITUDE: -58.460417 * MEDIAN LONGITUDE: 62.502083 * SOUTH-BOUND LATITUDE: -66.683333 * WEST-BOUND LONGITUDE: 61.833333 * NORTH-BOUND LATITUDE: -49.000000 * EAST-BOUND LONGITUDE: 70.333333 * DATE/TIME START: 1994-02-10T00:00:00 * DATE/TIME END: 1994-03-08T00:00:00 1997 application/zip, 16 datasets https://doi.pangaea.de/10.1594/PANGAEA.736976 https://doi.org/10.1594/PANGAEA.736976 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.736976 https://doi.org/10.1594/PANGAEA.736976 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess Supplement to: Becquevort, Sylvie (1997): Nanoprotozooplankton in the Atlantic sector of the Southern Ocean during early spring: biomass and feeding activities. Deep Sea Research Part II: Topical Studies in Oceanography, 44(1-2), 355-373, https://doi.org/10.1016/S0967-0645(96)00076-8 ANTARES-II ANTARES-II_A01 ANTARES-II_A04 ANTARES-II_A05 ANTARES-II_A06 ANTARES-II_A07 ANTARES-II_A08 ANTARES-II_A09 ANTARES-II_A10 ANTARES-II_A11 ANTARES-II_A12 ANTARES-II_A13 ANTARES-II_A14 ANTARES-II_A15 ANTARES-II_A16 ANTARES-II_A17 ANTARES-II_A18 Biogeochemical Processes in the Oceans and Fluxes JGOFS Joint Global Ocean Flux Study Marion Dufresne (1972) MD78 OCE Oceanography PROOF dataset publication series 1997 ftpangaea https://doi.org/10.1594/PANGAEA.73697610.1016/S0967-0645(96)00076-8 2024-07-24T02:31:20Z The dynamic of early spring nanoprotozoa was investigated in three characteristic water masses of the Southern Ocean: the Marginal Ice Zone, the intermediate waters of the Antarctic Circumpolar Current and the Polar Frontal Zone. Biomass and feeding activities of nanoprotozoa were measured, as well as the biomass of their potential prey-bacteria and phototrophic flagellates-on the 6°W meridian in the Southern Ocean along three repetitive transects between 47 and 60° South from October to November 1992. On average, nanoprotozooplankton biomass accounted for 77% of the combined biomass of bacteria and phototrophic flagellates, and was dominated by dinoflagellates and flagellates smaller than 5 µm. As a general trend, low protozoan biomass of 2 mg C/m**3 was typical of the ice covered area, while significantly higher biomasses culminating at 15 mg C/m**3 were recorded at the Polar Front. Biomasses of bacteria and total phytoplankton were distributed accordingly, with larger values at the Polar Front. Phototrophic flagellates did not show any geographical trend. No seasonal trend could be identified in the Marginal Ice Zone and in the intermediate waters of the Antarctic Circumpolar Current. On the other hand, at the Polar Front region a three-fold increase was observed within a 2-month period for nanoprotozooplankton biomass. Such a biomass increase was also detected for bacterioplankton and total phytoplankton biomass. Half-saturation constants and maximum specific ingestion of nanoprotozoan taxons feeding on bacteria and phototrophic flagellates were determined using the technique of fluorescent labelled bacteria (FLB) and algae (FLA) over a large range of prey concentrations. Maximum ingestion rates ranged between 0.002 and 0.015/h for bactivorous nanoprotozoa and heterotrophic flagellates larger than 5 µm feeding on phototrophic flagellates. The markedly high maximum ingestion rates of 0.4/h characterising nanophytoplankton ingestion by dinoflagellates evidenced the strong ability of dinoflagellates for feeding ... Other/Unknown Material Antarc* Antarctic Southern Ocean PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(61.833333,70.333333,-49.000000,-66.683333) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
ANTARES-II ANTARES-II_A01 ANTARES-II_A04 ANTARES-II_A05 ANTARES-II_A06 ANTARES-II_A07 ANTARES-II_A08 ANTARES-II_A09 ANTARES-II_A10 ANTARES-II_A11 ANTARES-II_A12 ANTARES-II_A13 ANTARES-II_A14 ANTARES-II_A15 ANTARES-II_A16 ANTARES-II_A17 ANTARES-II_A18 Biogeochemical Processes in the Oceans and Fluxes JGOFS Joint Global Ocean Flux Study Marion Dufresne (1972) MD78 OCE Oceanography PROOF |
spellingShingle |
ANTARES-II ANTARES-II_A01 ANTARES-II_A04 ANTARES-II_A05 ANTARES-II_A06 ANTARES-II_A07 ANTARES-II_A08 ANTARES-II_A09 ANTARES-II_A10 ANTARES-II_A11 ANTARES-II_A12 ANTARES-II_A13 ANTARES-II_A14 ANTARES-II_A15 ANTARES-II_A16 ANTARES-II_A17 ANTARES-II_A18 Biogeochemical Processes in the Oceans and Fluxes JGOFS Joint Global Ocean Flux Study Marion Dufresne (1972) MD78 OCE Oceanography PROOF Becquevort, Sylvie Biomass of nanoprotozooplankton in the Atlantic sector of the Southern Ocean |
topic_facet |
ANTARES-II ANTARES-II_A01 ANTARES-II_A04 ANTARES-II_A05 ANTARES-II_A06 ANTARES-II_A07 ANTARES-II_A08 ANTARES-II_A09 ANTARES-II_A10 ANTARES-II_A11 ANTARES-II_A12 ANTARES-II_A13 ANTARES-II_A14 ANTARES-II_A15 ANTARES-II_A16 ANTARES-II_A17 ANTARES-II_A18 Biogeochemical Processes in the Oceans and Fluxes JGOFS Joint Global Ocean Flux Study Marion Dufresne (1972) MD78 OCE Oceanography PROOF |
description |
The dynamic of early spring nanoprotozoa was investigated in three characteristic water masses of the Southern Ocean: the Marginal Ice Zone, the intermediate waters of the Antarctic Circumpolar Current and the Polar Frontal Zone. Biomass and feeding activities of nanoprotozoa were measured, as well as the biomass of their potential prey-bacteria and phototrophic flagellates-on the 6°W meridian in the Southern Ocean along three repetitive transects between 47 and 60° South from October to November 1992. On average, nanoprotozooplankton biomass accounted for 77% of the combined biomass of bacteria and phototrophic flagellates, and was dominated by dinoflagellates and flagellates smaller than 5 µm. As a general trend, low protozoan biomass of 2 mg C/m**3 was typical of the ice covered area, while significantly higher biomasses culminating at 15 mg C/m**3 were recorded at the Polar Front. Biomasses of bacteria and total phytoplankton were distributed accordingly, with larger values at the Polar Front. Phototrophic flagellates did not show any geographical trend. No seasonal trend could be identified in the Marginal Ice Zone and in the intermediate waters of the Antarctic Circumpolar Current. On the other hand, at the Polar Front region a three-fold increase was observed within a 2-month period for nanoprotozooplankton biomass. Such a biomass increase was also detected for bacterioplankton and total phytoplankton biomass. Half-saturation constants and maximum specific ingestion of nanoprotozoan taxons feeding on bacteria and phototrophic flagellates were determined using the technique of fluorescent labelled bacteria (FLB) and algae (FLA) over a large range of prey concentrations. Maximum ingestion rates ranged between 0.002 and 0.015/h for bactivorous nanoprotozoa and heterotrophic flagellates larger than 5 µm feeding on phototrophic flagellates. The markedly high maximum ingestion rates of 0.4/h characterising nanophytoplankton ingestion by dinoflagellates evidenced the strong ability of dinoflagellates for feeding ... |
format |
Other/Unknown Material |
author |
Becquevort, Sylvie |
author_facet |
Becquevort, Sylvie |
author_sort |
Becquevort, Sylvie |
title |
Biomass of nanoprotozooplankton in the Atlantic sector of the Southern Ocean |
title_short |
Biomass of nanoprotozooplankton in the Atlantic sector of the Southern Ocean |
title_full |
Biomass of nanoprotozooplankton in the Atlantic sector of the Southern Ocean |
title_fullStr |
Biomass of nanoprotozooplankton in the Atlantic sector of the Southern Ocean |
title_full_unstemmed |
Biomass of nanoprotozooplankton in the Atlantic sector of the Southern Ocean |
title_sort |
biomass of nanoprotozooplankton in the atlantic sector of the southern ocean |
publisher |
PANGAEA |
publishDate |
1997 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.736976 https://doi.org/10.1594/PANGAEA.736976 |
op_coverage |
MEDIAN LATITUDE: -58.460417 * MEDIAN LONGITUDE: 62.502083 * SOUTH-BOUND LATITUDE: -66.683333 * WEST-BOUND LONGITUDE: 61.833333 * NORTH-BOUND LATITUDE: -49.000000 * EAST-BOUND LONGITUDE: 70.333333 * DATE/TIME START: 1994-02-10T00:00:00 * DATE/TIME END: 1994-03-08T00:00:00 |
long_lat |
ENVELOPE(61.833333,70.333333,-49.000000,-66.683333) |
genre |
Antarc* Antarctic Southern Ocean |
genre_facet |
Antarc* Antarctic Southern Ocean |
op_source |
Supplement to: Becquevort, Sylvie (1997): Nanoprotozooplankton in the Atlantic sector of the Southern Ocean during early spring: biomass and feeding activities. Deep Sea Research Part II: Topical Studies in Oceanography, 44(1-2), 355-373, https://doi.org/10.1016/S0967-0645(96)00076-8 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.736976 https://doi.org/10.1594/PANGAEA.736976 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1594/PANGAEA.73697610.1016/S0967-0645(96)00076-8 |
_version_ |
1810487767618027520 |