Metabolic state along a summer north-south transect near the Antarctic Peninsula: A size spectra approach
To establish a metabolic state along a north–south transect in Antarctic waters, we approached community respiration (CR) from a combined perspective based on the metabolic theory of ecology (MTE) and the size-scaling of the whole planktonic community. A detailed analysis of a summer integrated mult...
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Online Access: | http://hdl.handle.net/10553/49860 https://doi.org/10.1093/plankt/fbu042 |
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ftunivlaspalmas:oai:accedacris.ulpgc.es:10553/49860 2023-05-15T13:45:50+02:00 Metabolic state along a summer north-south transect near the Antarctic Peninsula: A size spectra approach García-Muñoz, Cristina García, Carlos M. Lubián, Luis M. López-Urrutia, Ángel Hernández-León, Santiago Ameneiro, Julia 55674751000 55675097100 6603675433 6602569062 6701465678 16645098300 2014 http://hdl.handle.net/10553/49860 https://doi.org/10.1093/plankt/fbu042 eng eng 0142-7873 Journal of Plankton Research 0142-7873 http://hdl.handle.net/10553/49860 doi:10.1093/plankt/fbu042 84904357287 1091 1074 36 Journal of Plankton Research [ISSN 0142-7873], v. 36, p. 1074-1091 251001 Oceanografía biológica Metabolic state Normalized biomass size spectra South Shetland Islands info:eu-repo/semantics/article Article 2014 ftunivlaspalmas https://doi.org/10.1093/plankt/fbu042 2020-03-04T00:11:36Z To establish a metabolic state along a north–south transect in Antarctic waters, we approached community respiration (CR) from a combined perspective based on the metabolic theory of ecology (MTE) and the size-scaling of the whole planktonic community. A detailed analysis of a summer integrated multi-trophic normalized biomass size spectra (NBSS), from heterotrophic bacteria to zooplankton, was carried out. To acquire individual size data, different techniques were combined: flow cytometry for smaller fractions (<20 µm of equivalent spherical diameter), FlowCAM for larger nano- and microplankton and scanning and image analysis for the zooplankton fractions. The distribution of the NBSS was linear at all stations (R2 values: 0.87–0.93) but dome-shape features appeared related to phytoplankton cell distribution which are responsible for a large fraction of microbial respiration. Generally, the region showed an autotrophic budget south of the archipelago due to gross primary production (GPP) values up to 2804 mg C m−2 day−1, where salps could significantly contribute to the carbon export flux. Contrastingly, higher CR rates (>1000 mg C m−2 day−1) were found at the northern stations due to a higher phytoplankton respiration activity associated with increasing sea water temperatures and a higher presence of heterotrophic organisms (microheterotrophs, chaetognaths and copepods) resulting in a net heterotrophic metabolic state (GPP/CR < 1). Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula South Shetland Islands Copepods Universidad de Las Palmas de Gran Canaria: Acceda Antarctic Antarctic Peninsula South Shetland Islands The Antarctic Journal of Plankton Research 36 4 1074 1091 |
institution |
Open Polar |
collection |
Universidad de Las Palmas de Gran Canaria: Acceda |
op_collection_id |
ftunivlaspalmas |
language |
English |
topic |
251001 Oceanografía biológica Metabolic state Normalized biomass size spectra South Shetland Islands |
spellingShingle |
251001 Oceanografía biológica Metabolic state Normalized biomass size spectra South Shetland Islands García-Muñoz, Cristina García, Carlos M. Lubián, Luis M. López-Urrutia, Ángel Hernández-León, Santiago Ameneiro, Julia Metabolic state along a summer north-south transect near the Antarctic Peninsula: A size spectra approach |
topic_facet |
251001 Oceanografía biológica Metabolic state Normalized biomass size spectra South Shetland Islands |
description |
To establish a metabolic state along a north–south transect in Antarctic waters, we approached community respiration (CR) from a combined perspective based on the metabolic theory of ecology (MTE) and the size-scaling of the whole planktonic community. A detailed analysis of a summer integrated multi-trophic normalized biomass size spectra (NBSS), from heterotrophic bacteria to zooplankton, was carried out. To acquire individual size data, different techniques were combined: flow cytometry for smaller fractions (<20 µm of equivalent spherical diameter), FlowCAM for larger nano- and microplankton and scanning and image analysis for the zooplankton fractions. The distribution of the NBSS was linear at all stations (R2 values: 0.87–0.93) but dome-shape features appeared related to phytoplankton cell distribution which are responsible for a large fraction of microbial respiration. Generally, the region showed an autotrophic budget south of the archipelago due to gross primary production (GPP) values up to 2804 mg C m−2 day−1, where salps could significantly contribute to the carbon export flux. Contrastingly, higher CR rates (>1000 mg C m−2 day−1) were found at the northern stations due to a higher phytoplankton respiration activity associated with increasing sea water temperatures and a higher presence of heterotrophic organisms (microheterotrophs, chaetognaths and copepods) resulting in a net heterotrophic metabolic state (GPP/CR < 1). |
author2 |
55674751000 55675097100 6603675433 6602569062 6701465678 16645098300 |
format |
Article in Journal/Newspaper |
author |
García-Muñoz, Cristina García, Carlos M. Lubián, Luis M. López-Urrutia, Ángel Hernández-León, Santiago Ameneiro, Julia |
author_facet |
García-Muñoz, Cristina García, Carlos M. Lubián, Luis M. López-Urrutia, Ángel Hernández-León, Santiago Ameneiro, Julia |
author_sort |
García-Muñoz, Cristina |
title |
Metabolic state along a summer north-south transect near the Antarctic Peninsula: A size spectra approach |
title_short |
Metabolic state along a summer north-south transect near the Antarctic Peninsula: A size spectra approach |
title_full |
Metabolic state along a summer north-south transect near the Antarctic Peninsula: A size spectra approach |
title_fullStr |
Metabolic state along a summer north-south transect near the Antarctic Peninsula: A size spectra approach |
title_full_unstemmed |
Metabolic state along a summer north-south transect near the Antarctic Peninsula: A size spectra approach |
title_sort |
metabolic state along a summer north-south transect near the antarctic peninsula: a size spectra approach |
publisher |
0142-7873 |
publishDate |
2014 |
url |
http://hdl.handle.net/10553/49860 https://doi.org/10.1093/plankt/fbu042 |
geographic |
Antarctic Antarctic Peninsula South Shetland Islands The Antarctic |
geographic_facet |
Antarctic Antarctic Peninsula South Shetland Islands The Antarctic |
genre |
Antarc* Antarctic Antarctic Peninsula South Shetland Islands Copepods |
genre_facet |
Antarc* Antarctic Antarctic Peninsula South Shetland Islands Copepods |
op_source |
Journal of Plankton Research [ISSN 0142-7873], v. 36, p. 1074-1091 |
op_relation |
Journal of Plankton Research 0142-7873 http://hdl.handle.net/10553/49860 doi:10.1093/plankt/fbu042 84904357287 1091 1074 36 |
op_doi |
https://doi.org/10.1093/plankt/fbu042 |
container_title |
Journal of Plankton Research |
container_volume |
36 |
container_issue |
4 |
container_start_page |
1074 |
op_container_end_page |
1091 |
_version_ |
1766231534247870464 |