Effects of increase glacier discharge on phytoplankton bloom dynamics and pelagic geochemistry in a high Arctic fjord
International audience Arctic fjords experience extremely pronounced seasonal variability and spatial heterogeneity associated with changes in ice cover, glacial retreat and the intrusion of continental shelf’s adjacent water masses. Global warming intensifies natural environmental variability on th...
Published in: | Progress in Oceanography |
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Main Authors: | , , , , , , , |
Other Authors: | , , , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2017
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Subjects: | |
Online Access: | https://doi.org/10.1016/j.pocean.2017.07.005 https://hal-univ-perp.archives-ouvertes.fr/hal-01686759/file/Calleja_etal_PiO_2017.pdf https://hal-univ-perp.archives-ouvertes.fr/hal-01686759 |
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fttriple:oai:gotriple.eu:10670/1.oh70a9 |
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record_format |
openpolar |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
fttriple |
language |
English |
topic |
Diatom bloom Carbon and nitrogen stable isotopes Organic matter Glaciers Arctic Fjords ACL envir geo |
spellingShingle |
Diatom bloom Carbon and nitrogen stable isotopes Organic matter Glaciers Arctic Fjords ACL envir geo Calleja, Maria Ll. Kerhervé, P. Bourgeois, S. Kędra, M. Leynaert, Aude Devred, E. Babin, M. Morata, N. Effects of increase glacier discharge on phytoplankton bloom dynamics and pelagic geochemistry in a high Arctic fjord |
topic_facet |
Diatom bloom Carbon and nitrogen stable isotopes Organic matter Glaciers Arctic Fjords ACL envir geo |
description |
International audience Arctic fjords experience extremely pronounced seasonal variability and spatial heterogeneity associated with changes in ice cover, glacial retreat and the intrusion of continental shelf’s adjacent water masses. Global warming intensifies natural environmental variability on these important systems, yet the regional and global effects of these processes are still poorly understood. In the present study, we examine seasonal and spatial variability in Kongsfjorden, on the western coast of Spitsbergen, Svalbard. We report hydrological, biological, and biogeochemical data collected during spring, summer, and fall 2012. Our results show a strong phytoplankton bloom with the highest chlorophyll a (Chla) levels ever reported in this area, peaking 15.5 μg/L during late May and completely dominated by large diatoms at the inner fjord, that may sustain both pelagic and benthic production under weakly stratified conditions at the glacier front. A progressively stronger stratification of the water column during summer and fall was shaped by the intrusion of warm Atlantic water (T >3 °C and Sal >34.65) into the fjord at around 100 m depth, and by turbid freshwater plumes (T <1 °C and Sal< 34.65) at the surface due to glacier meltwater input. Biopolymeric carbon fractions and isotopic signatures of the particulate organic material (POM) revealed very fresh and labile material produced during the spring bloom (13C enriched, with values up to −22.7‰ at the highest Chl a peak, and high in carbohydrates and proteins content – up to 167 and 148 μg/L, respectively-), and a clear and strong continental signature of the POM present during late summer and fall(13C depleted, with values averaging −26.5‰, and high in lipid content – up to 92 μg/L-) when freshwater melting is accentuated. Our data evidence the importance of combining both physical (i.e. water mass dominance) and geochemical (i.e. characteristics of material released by glacier runoff) data in order to understand the timing, intensity and ... |
author2 |
Instituto Andaluz de Ciencias de la Tierra (IACT) Universidad de Granada (UGR)-Consejo Superior de Investigaciones Científicas Madrid (CSIC) Red Sea Research Centre (RSRC) King Abdullah University of Science and Technology (KAUST) Centre de Formation et de Recherche sur les Environnements Méditérranéens (CEFREM) Université de Perpignan Via Domitia (UPVD)-Centre National de la Recherche Scientifique (CNRS) Laboratoire des Sciences de l'Environnement Marin (LEMAR) (LEMAR) Institut Universitaire Européen de la Mer (IUEM) Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Centre National de la Recherche Scientifique (CNRS)-Université de Brest (UBO) University of Aberdeen Polish Academy of Sciences (PAN) Fisheries and Oceans Canada (DFO) Takuvik Joint International Laboratory ULAVAL-CNRS Centre National de la Recherche Scientifique (CNRS)-Université Laval Québec (ULaval) ANR-11-PDOC-0018,ECOTAB,Effet des changements climatiques sur le benthos en Arctique(2011) |
format |
Article in Journal/Newspaper |
author |
Calleja, Maria Ll. Kerhervé, P. Bourgeois, S. Kędra, M. Leynaert, Aude Devred, E. Babin, M. Morata, N. |
author_facet |
Calleja, Maria Ll. Kerhervé, P. Bourgeois, S. Kędra, M. Leynaert, Aude Devred, E. Babin, M. Morata, N. |
author_sort |
Calleja, Maria Ll. |
title |
Effects of increase glacier discharge on phytoplankton bloom dynamics and pelagic geochemistry in a high Arctic fjord |
title_short |
Effects of increase glacier discharge on phytoplankton bloom dynamics and pelagic geochemistry in a high Arctic fjord |
title_full |
Effects of increase glacier discharge on phytoplankton bloom dynamics and pelagic geochemistry in a high Arctic fjord |
title_fullStr |
Effects of increase glacier discharge on phytoplankton bloom dynamics and pelagic geochemistry in a high Arctic fjord |
title_full_unstemmed |
Effects of increase glacier discharge on phytoplankton bloom dynamics and pelagic geochemistry in a high Arctic fjord |
title_sort |
effects of increase glacier discharge on phytoplankton bloom dynamics and pelagic geochemistry in a high arctic fjord |
publisher |
HAL CCSD |
publishDate |
2017 |
url |
https://doi.org/10.1016/j.pocean.2017.07.005 https://hal-univ-perp.archives-ouvertes.fr/hal-01686759/file/Calleja_etal_PiO_2017.pdf https://hal-univ-perp.archives-ouvertes.fr/hal-01686759 |
geographic |
Arctic Svalbard |
geographic_facet |
Arctic Svalbard |
genre |
Arctic glacier Global warming Kongsfjord* Kongsfjorden Phytoplankton Svalbard Spitsbergen |
genre_facet |
Arctic glacier Global warming Kongsfjord* Kongsfjorden Phytoplankton Svalbard Spitsbergen |
op_source |
Hyper Article en Ligne - Sciences de l'Homme et de la Société ISSN: 0079-6611 Progress in Oceanography Progress in Oceanography, Elsevier, 2017, 159, pp.195 - 210. ⟨10.1016/j.pocean.2017.07.005⟩ |
op_relation |
hal-01686759 doi:10.1016/j.pocean.2017.07.005 10670/1.oh70a9 https://hal-univ-perp.archives-ouvertes.fr/hal-01686759/file/Calleja_etal_PiO_2017.pdf https://hal-univ-perp.archives-ouvertes.fr/hal-01686759 |
op_rights |
other |
op_doi |
https://doi.org/10.1016/j.pocean.2017.07.005 |
container_title |
Progress in Oceanography |
container_volume |
159 |
container_start_page |
195 |
op_container_end_page |
210 |
_version_ |
1766328922702610432 |
spelling |
fttriple:oai:gotriple.eu:10670/1.oh70a9 2023-05-15T14:56:52+02:00 Effects of increase glacier discharge on phytoplankton bloom dynamics and pelagic geochemistry in a high Arctic fjord Calleja, Maria Ll. Kerhervé, P. Bourgeois, S. Kędra, M. Leynaert, Aude Devred, E. Babin, M. Morata, N. Instituto Andaluz de Ciencias de la Tierra (IACT) Universidad de Granada (UGR)-Consejo Superior de Investigaciones Científicas Madrid (CSIC) Red Sea Research Centre (RSRC) King Abdullah University of Science and Technology (KAUST) Centre de Formation et de Recherche sur les Environnements Méditérranéens (CEFREM) Université de Perpignan Via Domitia (UPVD)-Centre National de la Recherche Scientifique (CNRS) Laboratoire des Sciences de l'Environnement Marin (LEMAR) (LEMAR) Institut Universitaire Européen de la Mer (IUEM) Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Centre National de la Recherche Scientifique (CNRS)-Université de Brest (UBO) University of Aberdeen Polish Academy of Sciences (PAN) Fisheries and Oceans Canada (DFO) Takuvik Joint International Laboratory ULAVAL-CNRS Centre National de la Recherche Scientifique (CNRS)-Université Laval Québec (ULaval) ANR-11-PDOC-0018,ECOTAB,Effet des changements climatiques sur le benthos en Arctique(2011) 2017-12-01 https://doi.org/10.1016/j.pocean.2017.07.005 https://hal-univ-perp.archives-ouvertes.fr/hal-01686759/file/Calleja_etal_PiO_2017.pdf https://hal-univ-perp.archives-ouvertes.fr/hal-01686759 en eng HAL CCSD Elsevier hal-01686759 doi:10.1016/j.pocean.2017.07.005 10670/1.oh70a9 https://hal-univ-perp.archives-ouvertes.fr/hal-01686759/file/Calleja_etal_PiO_2017.pdf https://hal-univ-perp.archives-ouvertes.fr/hal-01686759 other Hyper Article en Ligne - Sciences de l'Homme et de la Société ISSN: 0079-6611 Progress in Oceanography Progress in Oceanography, Elsevier, 2017, 159, pp.195 - 210. ⟨10.1016/j.pocean.2017.07.005⟩ Diatom bloom Carbon and nitrogen stable isotopes Organic matter Glaciers Arctic Fjords ACL envir geo Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2017 fttriple https://doi.org/10.1016/j.pocean.2017.07.005 2023-01-22T16:47:11Z International audience Arctic fjords experience extremely pronounced seasonal variability and spatial heterogeneity associated with changes in ice cover, glacial retreat and the intrusion of continental shelf’s adjacent water masses. Global warming intensifies natural environmental variability on these important systems, yet the regional and global effects of these processes are still poorly understood. In the present study, we examine seasonal and spatial variability in Kongsfjorden, on the western coast of Spitsbergen, Svalbard. We report hydrological, biological, and biogeochemical data collected during spring, summer, and fall 2012. Our results show a strong phytoplankton bloom with the highest chlorophyll a (Chla) levels ever reported in this area, peaking 15.5 μg/L during late May and completely dominated by large diatoms at the inner fjord, that may sustain both pelagic and benthic production under weakly stratified conditions at the glacier front. A progressively stronger stratification of the water column during summer and fall was shaped by the intrusion of warm Atlantic water (T >3 °C and Sal >34.65) into the fjord at around 100 m depth, and by turbid freshwater plumes (T <1 °C and Sal< 34.65) at the surface due to glacier meltwater input. Biopolymeric carbon fractions and isotopic signatures of the particulate organic material (POM) revealed very fresh and labile material produced during the spring bloom (13C enriched, with values up to −22.7‰ at the highest Chl a peak, and high in carbohydrates and proteins content – up to 167 and 148 μg/L, respectively-), and a clear and strong continental signature of the POM present during late summer and fall(13C depleted, with values averaging −26.5‰, and high in lipid content – up to 92 μg/L-) when freshwater melting is accentuated. Our data evidence the importance of combining both physical (i.e. water mass dominance) and geochemical (i.e. characteristics of material released by glacier runoff) data in order to understand the timing, intensity and ... Article in Journal/Newspaper Arctic glacier Global warming Kongsfjord* Kongsfjorden Phytoplankton Svalbard Spitsbergen Unknown Arctic Svalbard Progress in Oceanography 159 195 210 |