Climate change impacts on the distribution of the benthic macrofauna in the English Channel
In the North-East Atlantic, the English Channel constitutes a biogeographical transition zone between the Boreal and Lusitanian provinces. Thus, many species reach there their distribution range limits. The aim of this thesis is to assess the effects of recent climate change on the distribution of t...
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ftccsdartic:oai:HAL:tel-01661329v1 2024-02-27T08:43:39+00:00 Climate change impacts on the distribution of the benthic macrofauna in the English Channel Effets du changement climatique sur la distribution de la macrofaune benthique en Manche Gaudin, François Adaptation et diversité en milieu marin (AD2M) Station biologique de Roscoff Roscoff (SBR) Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) Université Pierre et Marie Curie - Paris VI Nicolas Desroy Éric Thiébaut 2017-02-28 https://theses.hal.science/tel-01661329 https://theses.hal.science/tel-01661329/document https://theses.hal.science/tel-01661329/file/2017PA066182.pdf fr fre HAL CCSD NNT: 2017PA066182 tel-01661329 https://theses.hal.science/tel-01661329 https://theses.hal.science/tel-01661329/document https://theses.hal.science/tel-01661329/file/2017PA066182.pdf info:eu-repo/semantics/OpenAccess https://theses.hal.science/tel-01661329 Océanographie. Université Pierre et Marie Curie - Paris VI, 2017. Français. ⟨NNT : 2017PA066182⟩ Benthic macrofauna Climate change Seabed temperature Macrofaune benthique Changement climatique Température de fond Changements de distribution Modèles de distribution d'espèces Manche [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography info:eu-repo/semantics/doctoralThesis Theses 2017 ftccsdartic 2024-01-28T03:34:26Z In the North-East Atlantic, the English Channel constitutes a biogeographical transition zone between the Boreal and Lusitanian provinces. Thus, many species reach there their distribution range limits. The aim of this thesis is to assess the effects of recent climate change on the distribution of the subtidal benthic macrofauna, poorly studied to date, basing on the comparison of data collected during a cool period (i.e. 1960s-70s) and during a warm period (i.e. 2012 and 2014) in the circalittoral coarse sediments. Two large communities were highlighted in the study of the structure of the assemblages found in this habitat: the gravelly coarse sand community and the pebbles and gravels community. The analysis of the evolution of seabed temperature for the last 30 years showed the spatial heterogeneity of the warming, varying from 0.1 to 0.5°C per decade from West to East. This warming did not translate into large species distribution shifts but into a sharp decrease in the number of occurrences of cold-water species and a sharp increase in the number of occurrences of warm-water species. Development of species distribution models allowed to identify the relative importance of climatic and edaphic factors in the distribution of benthic invertebrates in the Channel and to assess the species’ ability to adjust their distribution to the rise in temperature. The whole results suggest that ongoing climate change could lead to a decrease in benthic biodiversity at range limits, especially where connection routes are lacking for new migrants. A l’échelle de l’Atlantique Nord-Est, la Manche se situe à un carrefour biogéographique entre les provinces boréale et lusitanienne. Ainsi, de nombreuses espèces y sont en limite d’aire de distribution. L’objectif de cette thèse est d’évaluer les effets du changement climatique récent sur la distribution de la macrofaune benthique subtidale, peu étudiée à ce jour, en se basant sur la comparaison de données collectées à l’échelle de la Manche lors une période froide (i.e. années ... Doctoral or Postdoctoral Thesis North East Atlantic Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Carrefour ENVELOPE(139.304,139.304,-66.828,-66.828) |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
French |
topic |
Benthic macrofauna Climate change Seabed temperature Macrofaune benthique Changement climatique Température de fond Changements de distribution Modèles de distribution d'espèces Manche [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
spellingShingle |
Benthic macrofauna Climate change Seabed temperature Macrofaune benthique Changement climatique Température de fond Changements de distribution Modèles de distribution d'espèces Manche [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography Gaudin, François Climate change impacts on the distribution of the benthic macrofauna in the English Channel |
topic_facet |
Benthic macrofauna Climate change Seabed temperature Macrofaune benthique Changement climatique Température de fond Changements de distribution Modèles de distribution d'espèces Manche [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
description |
In the North-East Atlantic, the English Channel constitutes a biogeographical transition zone between the Boreal and Lusitanian provinces. Thus, many species reach there their distribution range limits. The aim of this thesis is to assess the effects of recent climate change on the distribution of the subtidal benthic macrofauna, poorly studied to date, basing on the comparison of data collected during a cool period (i.e. 1960s-70s) and during a warm period (i.e. 2012 and 2014) in the circalittoral coarse sediments. Two large communities were highlighted in the study of the structure of the assemblages found in this habitat: the gravelly coarse sand community and the pebbles and gravels community. The analysis of the evolution of seabed temperature for the last 30 years showed the spatial heterogeneity of the warming, varying from 0.1 to 0.5°C per decade from West to East. This warming did not translate into large species distribution shifts but into a sharp decrease in the number of occurrences of cold-water species and a sharp increase in the number of occurrences of warm-water species. Development of species distribution models allowed to identify the relative importance of climatic and edaphic factors in the distribution of benthic invertebrates in the Channel and to assess the species’ ability to adjust their distribution to the rise in temperature. The whole results suggest that ongoing climate change could lead to a decrease in benthic biodiversity at range limits, especially where connection routes are lacking for new migrants. A l’échelle de l’Atlantique Nord-Est, la Manche se situe à un carrefour biogéographique entre les provinces boréale et lusitanienne. Ainsi, de nombreuses espèces y sont en limite d’aire de distribution. L’objectif de cette thèse est d’évaluer les effets du changement climatique récent sur la distribution de la macrofaune benthique subtidale, peu étudiée à ce jour, en se basant sur la comparaison de données collectées à l’échelle de la Manche lors une période froide (i.e. années ... |
author2 |
Adaptation et diversité en milieu marin (AD2M) Station biologique de Roscoff Roscoff (SBR) Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) Université Pierre et Marie Curie - Paris VI Nicolas Desroy Éric Thiébaut |
format |
Doctoral or Postdoctoral Thesis |
author |
Gaudin, François |
author_facet |
Gaudin, François |
author_sort |
Gaudin, François |
title |
Climate change impacts on the distribution of the benthic macrofauna in the English Channel |
title_short |
Climate change impacts on the distribution of the benthic macrofauna in the English Channel |
title_full |
Climate change impacts on the distribution of the benthic macrofauna in the English Channel |
title_fullStr |
Climate change impacts on the distribution of the benthic macrofauna in the English Channel |
title_full_unstemmed |
Climate change impacts on the distribution of the benthic macrofauna in the English Channel |
title_sort |
climate change impacts on the distribution of the benthic macrofauna in the english channel |
publisher |
HAL CCSD |
publishDate |
2017 |
url |
https://theses.hal.science/tel-01661329 https://theses.hal.science/tel-01661329/document https://theses.hal.science/tel-01661329/file/2017PA066182.pdf |
long_lat |
ENVELOPE(139.304,139.304,-66.828,-66.828) |
geographic |
Carrefour |
geographic_facet |
Carrefour |
genre |
North East Atlantic |
genre_facet |
North East Atlantic |
op_source |
https://theses.hal.science/tel-01661329 Océanographie. Université Pierre et Marie Curie - Paris VI, 2017. Français. ⟨NNT : 2017PA066182⟩ |
op_relation |
NNT: 2017PA066182 tel-01661329 https://theses.hal.science/tel-01661329 https://theses.hal.science/tel-01661329/document https://theses.hal.science/tel-01661329/file/2017PA066182.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1792051673486589952 |