Glacier inputs influence organic matter composition and prokaryotic distribution in a high Arctic fjord (Kongsfjorden, Svalbard)
International audience With climate change, the strong seasonality and tight pelagic-benthic coupling in the Arctic is expected to change in the next few decades. It is currently unclear how the benthos will be affected by changes of environmental conditions such as supplies of organic matter (OM) f...
Published in: | Journal of Marine Systems |
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Main Authors: | , , , , |
Other Authors: | , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2016
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Online Access: | https://hal-univ-perp.archives-ouvertes.fr/hal-01374404 https://doi.org/10.1016/j.jmarsys.2016.08.009 |
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openpolar |
institution |
Open Polar |
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Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
Polar zones Pigments Biopolymeric carbon Biomarkers Bacteria Climate change ACL [SDV.EE.BIO]Life Sciences [q-bio]/Ecology environment/Bioclimatology [SDV.MP.BAC]Life Sciences [q-bio]/Microbiology and Parasitology/Bacteriology [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
spellingShingle |
Polar zones Pigments Biopolymeric carbon Biomarkers Bacteria Climate change ACL [SDV.EE.BIO]Life Sciences [q-bio]/Ecology environment/Bioclimatology [SDV.MP.BAC]Life Sciences [q-bio]/Microbiology and Parasitology/Bacteriology [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere Bourgeois, Solveig Kerhervéc, Philippe Callejae, Maria Ll. Manyc, Gaël Morataa, Nathalie Glacier inputs influence organic matter composition and prokaryotic distribution in a high Arctic fjord (Kongsfjorden, Svalbard) |
topic_facet |
Polar zones Pigments Biopolymeric carbon Biomarkers Bacteria Climate change ACL [SDV.EE.BIO]Life Sciences [q-bio]/Ecology environment/Bioclimatology [SDV.MP.BAC]Life Sciences [q-bio]/Microbiology and Parasitology/Bacteriology [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
description |
International audience With climate change, the strong seasonality and tight pelagic-benthic coupling in the Arctic is expected to change in the next few decades. It is currently unclear how the benthos will be affected by changes of environmental conditions such as supplies of organic matter (OM) from the water column. In the last decade, Kongsfjorden (79°N), a high Arctic fjord in Svalbard influenced by several glaciers and Atlantic water inflow, has been a site of great interest owing to its high sensitivity to climate change, evidenced by a reduction in ice cover and an increase in melting freshwater. To investigate how spatial and seasonal changes in vertical fluxes can impact the benthic compartment of Kongsfjorden, we studied the organic matter characteristics (in terms of quantity and quality) and prokaryotic distribution in sediments from 3 stations along a transect extending from the glacier into the outer fjord in 4 different seasons (spring, summer, autumn and winter) in 2012–2013. The biochemical parameters used to describe the sedimentary organic matter were organic carbon (OC), total nitrogen, bulk stable isotope ratios, pigments (chorophyll-a and phaeopigments) and biopolymeric carbon (BPC), which is the sum of the main macromolecules, i.e. lipids, proteins and carbohydrates. Prokaryotic abundance and distribution were estimated by 4′,6-diamidino-2-phenylindole (DAPI) staining. This study identifies a well-marked quantitative gradient of biogenic compounds throughout all seasons and also highlights a discrepancy between the quantity and quality of sedimentary organic matter within the fjord. The sediments near the glacier were organic-poor (< 0.3%OC), however the high primary productivity in the water column displayed during spring was reflected in summer sediments, and exhibited higher freshness of material at the inner station compared to the outer basin (means C-chlorophyll-a/OC ~ 5 and 1.5%, respectively). However, sediments at the glacier front were depleted in BPC (~ 0.2–0.3 mg C g− 1 ... |
author2 |
Laboratoire des Sciences de l'Environnement Marin (LEMAR) (LEMAR) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-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)-Centre National de la Recherche Scientifique (CNRS) School of Biological Sciences Aberdeen University of Aberdeen Centre de Formation et de Recherche sur les Environnements Méditérranéens (CEFREM) Université de Perpignan Via Domitia (UPVD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) King Abdullah University of Science and Technology (KAUST) Consejo Superior de Investigaciones Científicas Madrid (CSIC) Akvaplan-Niva Tromsø Norwegian Institute for Water Research (NIVA) ANR-11-PDOC-0018,ECOTAB,Effet des changements climatiques sur le benthos en Arctique(2011) |
format |
Article in Journal/Newspaper |
author |
Bourgeois, Solveig Kerhervéc, Philippe Callejae, Maria Ll. Manyc, Gaël Morataa, Nathalie |
author_facet |
Bourgeois, Solveig Kerhervéc, Philippe Callejae, Maria Ll. Manyc, Gaël Morataa, Nathalie |
author_sort |
Bourgeois, Solveig |
title |
Glacier inputs influence organic matter composition and prokaryotic distribution in a high Arctic fjord (Kongsfjorden, Svalbard) |
title_short |
Glacier inputs influence organic matter composition and prokaryotic distribution in a high Arctic fjord (Kongsfjorden, Svalbard) |
title_full |
Glacier inputs influence organic matter composition and prokaryotic distribution in a high Arctic fjord (Kongsfjorden, Svalbard) |
title_fullStr |
Glacier inputs influence organic matter composition and prokaryotic distribution in a high Arctic fjord (Kongsfjorden, Svalbard) |
title_full_unstemmed |
Glacier inputs influence organic matter composition and prokaryotic distribution in a high Arctic fjord (Kongsfjorden, Svalbard) |
title_sort |
glacier inputs influence organic matter composition and prokaryotic distribution in a high arctic fjord (kongsfjorden, svalbard) |
publisher |
HAL CCSD |
publishDate |
2016 |
url |
https://hal-univ-perp.archives-ouvertes.fr/hal-01374404 https://doi.org/10.1016/j.jmarsys.2016.08.009 |
geographic |
Arctic Svalbard |
geographic_facet |
Arctic Svalbard |
genre |
Arctic Climate change glacier Kongsfjord* Kongsfjorden Svalbard |
genre_facet |
Arctic Climate change glacier Kongsfjord* Kongsfjorden Svalbard |
op_source |
ISSN: 0924-7963 Journal of Marine Systems https://hal-univ-perp.archives-ouvertes.fr/hal-01374404 Journal of Marine Systems, Elsevier, 2016, 164, pp.112-127. ⟨10.1016/j.jmarsys.2016.08.009⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jmarsys.2016.08.009 hal-01374404 https://hal-univ-perp.archives-ouvertes.fr/hal-01374404 doi:10.1016/j.jmarsys.2016.08.009 |
op_doi |
https://doi.org/10.1016/j.jmarsys.2016.08.009 |
container_title |
Journal of Marine Systems |
container_volume |
164 |
container_start_page |
112 |
op_container_end_page |
127 |
_version_ |
1766330104083906560 |
spelling |
ftunivnantes:oai:HAL:hal-01374404v1 2023-05-15T14:58:01+02:00 Glacier inputs influence organic matter composition and prokaryotic distribution in a high Arctic fjord (Kongsfjorden, Svalbard) Bourgeois, Solveig Kerhervéc, Philippe Callejae, Maria Ll. Manyc, Gaël Morataa, Nathalie Laboratoire des Sciences de l'Environnement Marin (LEMAR) (LEMAR) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-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)-Centre National de la Recherche Scientifique (CNRS) School of Biological Sciences Aberdeen University of Aberdeen Centre de Formation et de Recherche sur les Environnements Méditérranéens (CEFREM) Université de Perpignan Via Domitia (UPVD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) King Abdullah University of Science and Technology (KAUST) Consejo Superior de Investigaciones Científicas Madrid (CSIC) Akvaplan-Niva Tromsø Norwegian Institute for Water Research (NIVA) ANR-11-PDOC-0018,ECOTAB,Effet des changements climatiques sur le benthos en Arctique(2011) 2016-12 https://hal-univ-perp.archives-ouvertes.fr/hal-01374404 https://doi.org/10.1016/j.jmarsys.2016.08.009 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jmarsys.2016.08.009 hal-01374404 https://hal-univ-perp.archives-ouvertes.fr/hal-01374404 doi:10.1016/j.jmarsys.2016.08.009 ISSN: 0924-7963 Journal of Marine Systems https://hal-univ-perp.archives-ouvertes.fr/hal-01374404 Journal of Marine Systems, Elsevier, 2016, 164, pp.112-127. ⟨10.1016/j.jmarsys.2016.08.009⟩ Polar zones Pigments Biopolymeric carbon Biomarkers Bacteria Climate change ACL [SDV.EE.BIO]Life Sciences [q-bio]/Ecology environment/Bioclimatology [SDV.MP.BAC]Life Sciences [q-bio]/Microbiology and Parasitology/Bacteriology [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere info:eu-repo/semantics/article Journal articles 2016 ftunivnantes https://doi.org/10.1016/j.jmarsys.2016.08.009 2022-06-12T07:12:08Z International audience With climate change, the strong seasonality and tight pelagic-benthic coupling in the Arctic is expected to change in the next few decades. It is currently unclear how the benthos will be affected by changes of environmental conditions such as supplies of organic matter (OM) from the water column. In the last decade, Kongsfjorden (79°N), a high Arctic fjord in Svalbard influenced by several glaciers and Atlantic water inflow, has been a site of great interest owing to its high sensitivity to climate change, evidenced by a reduction in ice cover and an increase in melting freshwater. To investigate how spatial and seasonal changes in vertical fluxes can impact the benthic compartment of Kongsfjorden, we studied the organic matter characteristics (in terms of quantity and quality) and prokaryotic distribution in sediments from 3 stations along a transect extending from the glacier into the outer fjord in 4 different seasons (spring, summer, autumn and winter) in 2012–2013. The biochemical parameters used to describe the sedimentary organic matter were organic carbon (OC), total nitrogen, bulk stable isotope ratios, pigments (chorophyll-a and phaeopigments) and biopolymeric carbon (BPC), which is the sum of the main macromolecules, i.e. lipids, proteins and carbohydrates. Prokaryotic abundance and distribution were estimated by 4′,6-diamidino-2-phenylindole (DAPI) staining. This study identifies a well-marked quantitative gradient of biogenic compounds throughout all seasons and also highlights a discrepancy between the quantity and quality of sedimentary organic matter within the fjord. The sediments near the glacier were organic-poor (< 0.3%OC), however the high primary productivity in the water column displayed during spring was reflected in summer sediments, and exhibited higher freshness of material at the inner station compared to the outer basin (means C-chlorophyll-a/OC ~ 5 and 1.5%, respectively). However, sediments at the glacier front were depleted in BPC (~ 0.2–0.3 mg C g− 1 ... Article in Journal/Newspaper Arctic Climate change glacier Kongsfjord* Kongsfjorden Svalbard Université de Nantes: HAL-UNIV-NANTES Arctic Svalbard Journal of Marine Systems 164 112 127 |