Daytime depth and thermal habitat of two sympatric krill species in response to surface salinity variability in the Gulf of St Lawrence, eastern Canada
Abstract Plourde, S., McQuinn, I. H., Maps, F., St-Pierre, J-F., Lavoie, D., and Joly, P. 2014. Daytime depth and thermal habitat of two sympatric krill species in response to surface salinity variability in the Gulf of St Lawrence, eastern Canada. – ICES Journal of Marine Science, 71: 272–281. We d...
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croxfordunivpr:10.1093/icesjms/fst023 2023-11-12T04:20:52+01:00 Daytime depth and thermal habitat of two sympatric krill species in response to surface salinity variability in the Gulf of St Lawrence, eastern Canada Plourde, Stéphane McQuinn, Ian H. Maps, Frédéric St-Pierre, Jean-François Lavoie, Diane Joly, Pierre 2013 http://dx.doi.org/10.1093/icesjms/fst023 http://academic.oup.com/icesjms/article-pdf/71/2/272/29147166/fst023.pdf en eng Oxford University Press (OUP) ICES Journal of Marine Science volume 71, issue 2, page 272-281 ISSN 1095-9289 1054-3139 Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography journal-article 2013 croxfordunivpr https://doi.org/10.1093/icesjms/fst023 2023-10-13T10:49:54Z Abstract Plourde, S., McQuinn, I. H., Maps, F., St-Pierre, J-F., Lavoie, D., and Joly, P. 2014. Daytime depth and thermal habitat of two sympatric krill species in response to surface salinity variability in the Gulf of St Lawrence, eastern Canada. – ICES Journal of Marine Science, 71: 272–281. We describe the response of acoustically determined weighted mean depth (WMD) of two sympatric species of krill, Thysanoessa raschii and Meganyctiphanes norvegica, to variations in surface salinity during summer in the Gulf of St Lawrence. In this coastal system, non-living particulates and CDOM carried by the freshwater run-off of the St Lawrence River and several large rivers have a strong impact on turbidity and light attenuance in the surface layer. The WMD of T. raschii and M. norvegica were significantly and positively related to surface salinity. However, M. norvegica was found deeper and in warmer water than T. raschii, and the latter had a steeper response to surface salinity. The species-specific relationships between daytime WMD and surface salinity enabled us to estimate both species regional and interannual variations in summertime temperature habitat during a 21-year period (1991–2011). The variability in daytime WMD resulted in significant inter- and intraspecific differences in the temperature experienced by adult krill that may impact development, growth, and reproduction. Our study illustrated the importance of considering species-specific responses to environmental forcing in coupled biophysical models that aim to explore the impacts of environmental variations on krill dynamics. Article in Journal/Newspaper Meganyctiphanes norvegica Thysanoessa raschii Oxford University Press (via Crossref) Canada Lawrence River ENVELOPE(-115.002,-115.002,58.384,58.384) ICES Journal of Marine Science 71 2 272 281 |
institution |
Open Polar |
collection |
Oxford University Press (via Crossref) |
op_collection_id |
croxfordunivpr |
language |
English |
topic |
Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography |
spellingShingle |
Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography Plourde, Stéphane McQuinn, Ian H. Maps, Frédéric St-Pierre, Jean-François Lavoie, Diane Joly, Pierre Daytime depth and thermal habitat of two sympatric krill species in response to surface salinity variability in the Gulf of St Lawrence, eastern Canada |
topic_facet |
Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography |
description |
Abstract Plourde, S., McQuinn, I. H., Maps, F., St-Pierre, J-F., Lavoie, D., and Joly, P. 2014. Daytime depth and thermal habitat of two sympatric krill species in response to surface salinity variability in the Gulf of St Lawrence, eastern Canada. – ICES Journal of Marine Science, 71: 272–281. We describe the response of acoustically determined weighted mean depth (WMD) of two sympatric species of krill, Thysanoessa raschii and Meganyctiphanes norvegica, to variations in surface salinity during summer in the Gulf of St Lawrence. In this coastal system, non-living particulates and CDOM carried by the freshwater run-off of the St Lawrence River and several large rivers have a strong impact on turbidity and light attenuance in the surface layer. The WMD of T. raschii and M. norvegica were significantly and positively related to surface salinity. However, M. norvegica was found deeper and in warmer water than T. raschii, and the latter had a steeper response to surface salinity. The species-specific relationships between daytime WMD and surface salinity enabled us to estimate both species regional and interannual variations in summertime temperature habitat during a 21-year period (1991–2011). The variability in daytime WMD resulted in significant inter- and intraspecific differences in the temperature experienced by adult krill that may impact development, growth, and reproduction. Our study illustrated the importance of considering species-specific responses to environmental forcing in coupled biophysical models that aim to explore the impacts of environmental variations on krill dynamics. |
format |
Article in Journal/Newspaper |
author |
Plourde, Stéphane McQuinn, Ian H. Maps, Frédéric St-Pierre, Jean-François Lavoie, Diane Joly, Pierre |
author_facet |
Plourde, Stéphane McQuinn, Ian H. Maps, Frédéric St-Pierre, Jean-François Lavoie, Diane Joly, Pierre |
author_sort |
Plourde, Stéphane |
title |
Daytime depth and thermal habitat of two sympatric krill species in response to surface salinity variability in the Gulf of St Lawrence, eastern Canada |
title_short |
Daytime depth and thermal habitat of two sympatric krill species in response to surface salinity variability in the Gulf of St Lawrence, eastern Canada |
title_full |
Daytime depth and thermal habitat of two sympatric krill species in response to surface salinity variability in the Gulf of St Lawrence, eastern Canada |
title_fullStr |
Daytime depth and thermal habitat of two sympatric krill species in response to surface salinity variability in the Gulf of St Lawrence, eastern Canada |
title_full_unstemmed |
Daytime depth and thermal habitat of two sympatric krill species in response to surface salinity variability in the Gulf of St Lawrence, eastern Canada |
title_sort |
daytime depth and thermal habitat of two sympatric krill species in response to surface salinity variability in the gulf of st lawrence, eastern canada |
publisher |
Oxford University Press (OUP) |
publishDate |
2013 |
url |
http://dx.doi.org/10.1093/icesjms/fst023 http://academic.oup.com/icesjms/article-pdf/71/2/272/29147166/fst023.pdf |
long_lat |
ENVELOPE(-115.002,-115.002,58.384,58.384) |
geographic |
Canada Lawrence River |
geographic_facet |
Canada Lawrence River |
genre |
Meganyctiphanes norvegica Thysanoessa raschii |
genre_facet |
Meganyctiphanes norvegica Thysanoessa raschii |
op_source |
ICES Journal of Marine Science volume 71, issue 2, page 272-281 ISSN 1095-9289 1054-3139 |
op_doi |
https://doi.org/10.1093/icesjms/fst023 |
container_title |
ICES Journal of Marine Science |
container_volume |
71 |
container_issue |
2 |
container_start_page |
272 |
op_container_end_page |
281 |
_version_ |
1782336594991120384 |