Krill excretion and its effect on primary production
During the austral summer, zooplankton excretion along the western Antarctic Peninsula was studied in a contrasting hydrographic regime including coastal and oceanic waters. In coastal waters, ammonium supply by mesozooplankton indicated a low contribution to fuel primary production. In oceanic wate...
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Language: | English |
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Inter Research
2012
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Online Access: | http://hdl.handle.net/10261/88888 https://doi.org/10.3354/meps09746 |
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ftcsic:oai:digital.csic.es:10261/88888 2024-02-11T09:56:14+01:00 Krill excretion and its effect on primary production Lehette, Pascal Tovar-Sánchez, Antonio Duarte, Carlos M. Hernández León, Santiago 2012-07-12 http://hdl.handle.net/10261/88888 https://doi.org/10.3354/meps09746 en eng Inter Research http://dx.doi.org/10.3354/meps09746 doi:10.3354/meps09746 issn: 0171-8630 Marine Ecology - Progress Series 459: 29-38 (2012) http://hdl.handle.net/10261/88888 none Krill Ammonium Primary production Euphausia superba Southern Ocean Austral summer Western Antarctic Peninsula artículo http://purl.org/coar/resource_type/c_6501 2012 ftcsic https://doi.org/10.3354/meps09746 2024-01-16T09:55:08Z During the austral summer, zooplankton excretion along the western Antarctic Peninsula was studied in a contrasting hydrographic regime including coastal and oceanic waters. In coastal waters, ammonium supply by mesozooplankton indicated a low contribution to fuel primary production. In oceanic waters, however, Antarctic krill Euphausia superba contributed a significant percentage to the nitrogen requirements of primary producers. Thus, the ontogenetic migration of adult krill during austral summer should be a key factor regulating the regenerated ammonium for primary production. A significant coupling of ammonium concentration in the water column and in situ krill biomass supported the significant role of krill excretion in the epipelagic realm. Results from short-term experiments with E. superba indicated that ammonium excretion rates were much higher than previously found. Because the use of experimental metabolic rates that are close to field rates would be more appropriate, we suggest to re-assess the ammonium supplied by the epipelagic marine biota. Moreover, the outcomes of experimental krill excretion rates, in situ measurements of ammonium and a review of data on primary production suggest that Antarctic krill sustain a high proportion of the daily phytoplankton production. © Inter-Research 2012. Peer Reviewed Article in Journal/Newspaper Antarc* Antarctic Antarctic Krill Antarctic Peninsula Euphausia superba Southern Ocean Digital.CSIC (Spanish National Research Council) Antarctic Antarctic Peninsula Austral Southern Ocean Marine Ecology Progress Series 459 29 38 |
institution |
Open Polar |
collection |
Digital.CSIC (Spanish National Research Council) |
op_collection_id |
ftcsic |
language |
English |
topic |
Krill Ammonium Primary production Euphausia superba Southern Ocean Austral summer Western Antarctic Peninsula |
spellingShingle |
Krill Ammonium Primary production Euphausia superba Southern Ocean Austral summer Western Antarctic Peninsula Lehette, Pascal Tovar-Sánchez, Antonio Duarte, Carlos M. Hernández León, Santiago Krill excretion and its effect on primary production |
topic_facet |
Krill Ammonium Primary production Euphausia superba Southern Ocean Austral summer Western Antarctic Peninsula |
description |
During the austral summer, zooplankton excretion along the western Antarctic Peninsula was studied in a contrasting hydrographic regime including coastal and oceanic waters. In coastal waters, ammonium supply by mesozooplankton indicated a low contribution to fuel primary production. In oceanic waters, however, Antarctic krill Euphausia superba contributed a significant percentage to the nitrogen requirements of primary producers. Thus, the ontogenetic migration of adult krill during austral summer should be a key factor regulating the regenerated ammonium for primary production. A significant coupling of ammonium concentration in the water column and in situ krill biomass supported the significant role of krill excretion in the epipelagic realm. Results from short-term experiments with E. superba indicated that ammonium excretion rates were much higher than previously found. Because the use of experimental metabolic rates that are close to field rates would be more appropriate, we suggest to re-assess the ammonium supplied by the epipelagic marine biota. Moreover, the outcomes of experimental krill excretion rates, in situ measurements of ammonium and a review of data on primary production suggest that Antarctic krill sustain a high proportion of the daily phytoplankton production. © Inter-Research 2012. Peer Reviewed |
format |
Article in Journal/Newspaper |
author |
Lehette, Pascal Tovar-Sánchez, Antonio Duarte, Carlos M. Hernández León, Santiago |
author_facet |
Lehette, Pascal Tovar-Sánchez, Antonio Duarte, Carlos M. Hernández León, Santiago |
author_sort |
Lehette, Pascal |
title |
Krill excretion and its effect on primary production |
title_short |
Krill excretion and its effect on primary production |
title_full |
Krill excretion and its effect on primary production |
title_fullStr |
Krill excretion and its effect on primary production |
title_full_unstemmed |
Krill excretion and its effect on primary production |
title_sort |
krill excretion and its effect on primary production |
publisher |
Inter Research |
publishDate |
2012 |
url |
http://hdl.handle.net/10261/88888 https://doi.org/10.3354/meps09746 |
geographic |
Antarctic Antarctic Peninsula Austral Southern Ocean |
geographic_facet |
Antarctic Antarctic Peninsula Austral Southern Ocean |
genre |
Antarc* Antarctic Antarctic Krill Antarctic Peninsula Euphausia superba Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctic Krill Antarctic Peninsula Euphausia superba Southern Ocean |
op_relation |
http://dx.doi.org/10.3354/meps09746 doi:10.3354/meps09746 issn: 0171-8630 Marine Ecology - Progress Series 459: 29-38 (2012) http://hdl.handle.net/10261/88888 |
op_rights |
none |
op_doi |
https://doi.org/10.3354/meps09746 |
container_title |
Marine Ecology Progress Series |
container_volume |
459 |
container_start_page |
29 |
op_container_end_page |
38 |
_version_ |
1790601648262873088 |