Relationship between Chlorophyll a Concentration, Light Attenuation and Diving Depth of the Southern Elephant Seal Mirounga leonina.
International audience Recently, a number of Antarctic marine environmental studies have used oceanographic parameters collected from instrumented top predators for ecological and physical information. Phytoplankton concentration is generally quantified through active measurement of chlorophyll fluo...
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ftunivnantes:oai:HAL:hal-00747506v1 2023-05-15T13:34:08+02:00 Relationship between Chlorophyll a Concentration, Light Attenuation and Diving Depth of the Southern Elephant Seal Mirounga leonina. Jaud, Thomas Dragon, Anne-Cécile Garcia, Jade Vacquie Guinet, Christophe Centre d'Études Biologiques de Chizé (CEBC) Institut National de la Recherche Agronomique (INRA)-Centre National de la Recherche Scientifique (CNRS) 2012 https://hal.science/hal-00747506 https://doi.org/10.1371/journal.pone.0047444 en eng HAL CCSD Public Library of Science info:eu-repo/semantics/altIdentifier/doi/10.1371/journal.pone.0047444 info:eu-repo/semantics/altIdentifier/pmid/23082166 hal-00747506 https://hal.science/hal-00747506 doi:10.1371/journal.pone.0047444 PUBMED: 23082166 PUBMEDCENTRAL: PMC3474817 ISSN: 1932-6203 EISSN: 1932-6203 PLoS ONE https://hal.science/hal-00747506 PLoS ONE, 2012, 7 (10), pp.e47444. ⟨10.1371/journal.pone.0047444⟩ [SDE]Environmental Sciences info:eu-repo/semantics/article Journal articles 2012 ftunivnantes https://doi.org/10.1371/journal.pone.0047444 2023-02-08T00:21:18Z International audience Recently, a number of Antarctic marine environmental studies have used oceanographic parameters collected from instrumented top predators for ecological and physical information. Phytoplankton concentration is generally quantified through active measurement of chlorophyll fluorescence. In this study, light absorption coefficient (K(0.75)) was used as an indicator of phytoplankton concentration. This measurement, easy to obtain and requiring low electric power, allows for assessing of the fine scale horizontal structuring of phytoplankton. As part of this study, Southern elephant seals (SES) were simultaneously equipped with a fluorometer and a light logger. Along the SES tracks, variations in K(0.75) were strongly correlated with chlorophyll, a concentration measured by the fluorometer within the euphotic layer. With regards to SES foraging behaviour, bottom depth of the seal's dive was highly dependent on light intensity at 150 m, indicating that the vertical distribution of SES's prey such as myctophids is tightly related to light level. Therefore, change in phytoplankton concentration may not only have a direct effect on SES's prey abundance but may also determine their vertical accessibility with likely consequences on SES foraging efficiency. Article in Journal/Newspaper Antarc* Antarctic Elephant Seal Elephant Seals Mirounga leonina Southern Elephant Seal Southern Elephant Seals Université de Nantes: HAL-UNIV-NANTES Antarctic PLoS ONE 7 10 e47444 |
institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
[SDE]Environmental Sciences |
spellingShingle |
[SDE]Environmental Sciences Jaud, Thomas Dragon, Anne-Cécile Garcia, Jade Vacquie Guinet, Christophe Relationship between Chlorophyll a Concentration, Light Attenuation and Diving Depth of the Southern Elephant Seal Mirounga leonina. |
topic_facet |
[SDE]Environmental Sciences |
description |
International audience Recently, a number of Antarctic marine environmental studies have used oceanographic parameters collected from instrumented top predators for ecological and physical information. Phytoplankton concentration is generally quantified through active measurement of chlorophyll fluorescence. In this study, light absorption coefficient (K(0.75)) was used as an indicator of phytoplankton concentration. This measurement, easy to obtain and requiring low electric power, allows for assessing of the fine scale horizontal structuring of phytoplankton. As part of this study, Southern elephant seals (SES) were simultaneously equipped with a fluorometer and a light logger. Along the SES tracks, variations in K(0.75) were strongly correlated with chlorophyll, a concentration measured by the fluorometer within the euphotic layer. With regards to SES foraging behaviour, bottom depth of the seal's dive was highly dependent on light intensity at 150 m, indicating that the vertical distribution of SES's prey such as myctophids is tightly related to light level. Therefore, change in phytoplankton concentration may not only have a direct effect on SES's prey abundance but may also determine their vertical accessibility with likely consequences on SES foraging efficiency. |
author2 |
Centre d'Études Biologiques de Chizé (CEBC) Institut National de la Recherche Agronomique (INRA)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Jaud, Thomas Dragon, Anne-Cécile Garcia, Jade Vacquie Guinet, Christophe |
author_facet |
Jaud, Thomas Dragon, Anne-Cécile Garcia, Jade Vacquie Guinet, Christophe |
author_sort |
Jaud, Thomas |
title |
Relationship between Chlorophyll a Concentration, Light Attenuation and Diving Depth of the Southern Elephant Seal Mirounga leonina. |
title_short |
Relationship between Chlorophyll a Concentration, Light Attenuation and Diving Depth of the Southern Elephant Seal Mirounga leonina. |
title_full |
Relationship between Chlorophyll a Concentration, Light Attenuation and Diving Depth of the Southern Elephant Seal Mirounga leonina. |
title_fullStr |
Relationship between Chlorophyll a Concentration, Light Attenuation and Diving Depth of the Southern Elephant Seal Mirounga leonina. |
title_full_unstemmed |
Relationship between Chlorophyll a Concentration, Light Attenuation and Diving Depth of the Southern Elephant Seal Mirounga leonina. |
title_sort |
relationship between chlorophyll a concentration, light attenuation and diving depth of the southern elephant seal mirounga leonina. |
publisher |
HAL CCSD |
publishDate |
2012 |
url |
https://hal.science/hal-00747506 https://doi.org/10.1371/journal.pone.0047444 |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic Elephant Seal Elephant Seals Mirounga leonina Southern Elephant Seal Southern Elephant Seals |
genre_facet |
Antarc* Antarctic Elephant Seal Elephant Seals Mirounga leonina Southern Elephant Seal Southern Elephant Seals |
op_source |
ISSN: 1932-6203 EISSN: 1932-6203 PLoS ONE https://hal.science/hal-00747506 PLoS ONE, 2012, 7 (10), pp.e47444. ⟨10.1371/journal.pone.0047444⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1371/journal.pone.0047444 info:eu-repo/semantics/altIdentifier/pmid/23082166 hal-00747506 https://hal.science/hal-00747506 doi:10.1371/journal.pone.0047444 PUBMED: 23082166 PUBMEDCENTRAL: PMC3474817 |
op_doi |
https://doi.org/10.1371/journal.pone.0047444 |
container_title |
PLoS ONE |
container_volume |
7 |
container_issue |
10 |
container_start_page |
e47444 |
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1766049156922605568 |