Relationship between chlorophyll a concentration, light attenuation and diving depth of the Southern elephant seal Mirounga leonina.
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...
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| Format: | Article |
| Language: | English |
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Public Library of Science (PLoS)
2012-01-01
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| Series: | PLoS ONE |
| Online Access: | http://europepmc.org/articles/PMC3474817?pdf=render |
| _version_ | 1818096182129328128 |
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| author | Thomas Jaud Anne-Cécile Dragon Jade Vacquie Garcia Christophe Guinet |
| author_facet | Thomas Jaud Anne-Cécile Dragon Jade Vacquie Garcia Christophe Guinet |
| author_sort | Thomas Jaud |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-12-10T23:00:33Z |
| format | Article |
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| institution | Directory Open Access Journal |
| issn | 1932-6203 |
| language | English |
| last_indexed | 2024-12-10T23:00:33Z |
| publishDate | 2012-01-01 |
| publisher | Public Library of Science (PLoS) |
| record_format | Article |
| series | PLoS ONE |
| spelling | doaj.art-446b757c382343a2893b52c6d84566562022-12-22T01:30:09ZengPublic Library of Science (PLoS)PLoS ONE1932-62032012-01-01710e4744410.1371/journal.pone.0047444Relationship between chlorophyll a concentration, light attenuation and diving depth of the Southern elephant seal Mirounga leonina.Thomas JaudAnne-Cécile DragonJade Vacquie GarciaChristophe GuinetRecently, 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.http://europepmc.org/articles/PMC3474817?pdf=render |
| spellingShingle | Thomas Jaud Anne-Cécile Dragon Jade Vacquie Garcia Christophe Guinet Relationship between chlorophyll a concentration, light attenuation and diving depth of the Southern elephant seal Mirounga leonina. PLoS ONE |
| title | 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_short | 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 |
| url | http://europepmc.org/articles/PMC3474817?pdf=render |
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