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...
Published in: | Marine Ecology Progress Series |
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Online Access: | http://hdl.handle.net/10553/49868 https://doi.org/10.3354/meps09746 |
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ftunivlaspalmas:oai:accedacris.ulpgc.es:10553/49868 2023-05-15T13:45:50+02:00 Krill excretion and its effect on primary production Lehette, Pascal Tovar-Sánchez, Antonio Duarte, Carlos M. Hernández-León, Santiago 35107243800 6602867315 55636631300 6701465678 2012 http://hdl.handle.net/10553/49868 https://doi.org/10.3354/meps09746 eng eng 0171-8630 Marine Ecology - Progress Series 0171-8630 http://hdl.handle.net/10553/49868 doi:10.3354/meps09746 84863845571 38 29 459 Marine Ecology Progress Series [ISSN 0171-8630], v. 459, p. 29-38 Investigación Krill Ammonium Primary production Euphausia superba Southern Ocean Austral summer Western Antarctic Peninsula info:eu-repo/semantics/article Article 2012 ftunivlaspalmas https://doi.org/10.3354/meps09746 2020-03-04T00:11:36Z 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. Article in Journal/Newspaper Antarc* Antarctic Antarctic Krill Antarctic Peninsula Euphausia superba Southern Ocean Universidad de Las Palmas de Gran Canaria: Acceda Antarctic Antarctic Peninsula Austral Southern Ocean Marine Ecology Progress Series 459 29 38 |
institution |
Open Polar |
collection |
Universidad de Las Palmas de Gran Canaria: Acceda |
op_collection_id |
ftunivlaspalmas |
language |
English |
topic |
Investigación Krill Ammonium Primary production Euphausia superba Southern Ocean Austral summer Western Antarctic Peninsula |
spellingShingle |
Investigación 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 |
Investigación 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. |
author2 |
35107243800 6602867315 55636631300 6701465678 |
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 |
0171-8630 |
publishDate |
2012 |
url |
http://hdl.handle.net/10553/49868 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_source |
Marine Ecology Progress Series [ISSN 0171-8630], v. 459, p. 29-38 |
op_relation |
Marine Ecology - Progress Series 0171-8630 http://hdl.handle.net/10553/49868 doi:10.3354/meps09746 84863845571 38 29 459 |
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_ |
1766231536551591936 |