Downscaling climate-driven changes in marine and limnic pelagic ecosystems in Western Europe : From patterns to mechanisms
International audience Identifying mediator factors linking climate changes and ecological processes in pelagic food-webs is a major challenge in ecology and resources management. Here, we have investigated how climate variability affects marine and limnic ecosystems. We used a downscaling and time-...
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ftccsdartic:oai:HAL:hal-02816400v1 2023-05-15T17:36:00+02:00 Downscaling climate-driven changes in marine and limnic pelagic ecosystems in Western Europe : From patterns to mechanisms Molinero, Juan Carlos Anneville, Orlane Souissi, Sami Gerdeaux, Daniel Centre Alpin de Recherche sur les Réseaux Trophiques et Ecosystèmes Limniques (CARRTEL) Institut National de la Recherche Agronomique (INRA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry ) Université des Sciences et Technologies (Lille 1) (USTL) Génétique et évolution des populations végétales (GEPV) Université de Lille, Sciences et Technologies-Centre National de la Recherche Scientifique (CNRS) Beijing, China 2006-11-07 https://hal.inrae.fr/hal-02816400 en eng HAL CCSD hal-02816400 https://hal.inrae.fr/hal-02816400 PRODINRA: 13979 2. International Young Scientits' Global Change Conference https://hal.inrae.fr/hal-02816400 2. International Young Scientits' Global Change Conference, Nov 2006, Beijing, China. pp.1 LAC LEMAN POISSON PLANCTON MODELISATION DE SERIES CHRONOLOGIQUES [SDV]Life Sciences [q-bio] info:eu-repo/semantics/conferenceObject Conference papers 2006 ftccsdartic 2021-07-03T23:15:08Z International audience Identifying mediator factors linking climate changes and ecological processes in pelagic food-webs is a major challenge in ecology and resources management. Here, we have investigated how climate variability affects marine and limnic ecosystems. We used a downscaling and time-series modelling approach in which we analyzed different spatial scales of climate for a period spanned from 1950 to 2005 in two location areas: the Ligurian Sea in the Northwestern Mediterranean and the Lake Geneva in the European Alps. Results provide substantial evidence of the Atlantic climate control on the long-term changes in pelagic trophic levels, from primary producers to fish, in the two ecosystems for the past three decades, although Lake Geneva was further affected by nutrient enrichment related to anthropogenic stress. Through direct effects on pelagic organisms, climate warming affects fecundity and developmental time, but also alters ecological interactions (i.e. predation and competition) that ultimately allowed to reorganisations in the investigated pelagic ecosystems. The results further show that climate forcing varies seasonally leading to different roots of large-scale climate forcing on the target sites: while the North Atlantic climate dominated the winter-spring period, the Subtropical Atlantic climate strongly affects the summer-autumn period. The cascade of interactions we identified, from large-scale climate to ecological processes, allow suggesting empirical models to explain how climate interacts with these pelagic ecosystems. These findings deserve attention to be considered in the assessment and modelling of pelagic food-webs and biogeochemical fluxes in climate change scenarios. They also draw attention to synchronous regime shifts in the investigated ecosystems that have occurred simultaneously with ecological regime changes documented in the Northern Hemisphere, and thus raise the question of plausible region-wide environmental shifts linked to climatic changes. Conference Object North Atlantic Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
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Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
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ftccsdartic |
language |
English |
topic |
LAC LEMAN POISSON PLANCTON MODELISATION DE SERIES CHRONOLOGIQUES [SDV]Life Sciences [q-bio] |
spellingShingle |
LAC LEMAN POISSON PLANCTON MODELISATION DE SERIES CHRONOLOGIQUES [SDV]Life Sciences [q-bio] Molinero, Juan Carlos Anneville, Orlane Souissi, Sami Gerdeaux, Daniel Downscaling climate-driven changes in marine and limnic pelagic ecosystems in Western Europe : From patterns to mechanisms |
topic_facet |
LAC LEMAN POISSON PLANCTON MODELISATION DE SERIES CHRONOLOGIQUES [SDV]Life Sciences [q-bio] |
description |
International audience Identifying mediator factors linking climate changes and ecological processes in pelagic food-webs is a major challenge in ecology and resources management. Here, we have investigated how climate variability affects marine and limnic ecosystems. We used a downscaling and time-series modelling approach in which we analyzed different spatial scales of climate for a period spanned from 1950 to 2005 in two location areas: the Ligurian Sea in the Northwestern Mediterranean and the Lake Geneva in the European Alps. Results provide substantial evidence of the Atlantic climate control on the long-term changes in pelagic trophic levels, from primary producers to fish, in the two ecosystems for the past three decades, although Lake Geneva was further affected by nutrient enrichment related to anthropogenic stress. Through direct effects on pelagic organisms, climate warming affects fecundity and developmental time, but also alters ecological interactions (i.e. predation and competition) that ultimately allowed to reorganisations in the investigated pelagic ecosystems. The results further show that climate forcing varies seasonally leading to different roots of large-scale climate forcing on the target sites: while the North Atlantic climate dominated the winter-spring period, the Subtropical Atlantic climate strongly affects the summer-autumn period. The cascade of interactions we identified, from large-scale climate to ecological processes, allow suggesting empirical models to explain how climate interacts with these pelagic ecosystems. These findings deserve attention to be considered in the assessment and modelling of pelagic food-webs and biogeochemical fluxes in climate change scenarios. They also draw attention to synchronous regime shifts in the investigated ecosystems that have occurred simultaneously with ecological regime changes documented in the Northern Hemisphere, and thus raise the question of plausible region-wide environmental shifts linked to climatic changes. |
author2 |
Centre Alpin de Recherche sur les Réseaux Trophiques et Ecosystèmes Limniques (CARRTEL) Institut National de la Recherche Agronomique (INRA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry ) Université des Sciences et Technologies (Lille 1) (USTL) Génétique et évolution des populations végétales (GEPV) Université de Lille, Sciences et Technologies-Centre National de la Recherche Scientifique (CNRS) |
format |
Conference Object |
author |
Molinero, Juan Carlos Anneville, Orlane Souissi, Sami Gerdeaux, Daniel |
author_facet |
Molinero, Juan Carlos Anneville, Orlane Souissi, Sami Gerdeaux, Daniel |
author_sort |
Molinero, Juan Carlos |
title |
Downscaling climate-driven changes in marine and limnic pelagic ecosystems in Western Europe : From patterns to mechanisms |
title_short |
Downscaling climate-driven changes in marine and limnic pelagic ecosystems in Western Europe : From patterns to mechanisms |
title_full |
Downscaling climate-driven changes in marine and limnic pelagic ecosystems in Western Europe : From patterns to mechanisms |
title_fullStr |
Downscaling climate-driven changes in marine and limnic pelagic ecosystems in Western Europe : From patterns to mechanisms |
title_full_unstemmed |
Downscaling climate-driven changes in marine and limnic pelagic ecosystems in Western Europe : From patterns to mechanisms |
title_sort |
downscaling climate-driven changes in marine and limnic pelagic ecosystems in western europe : from patterns to mechanisms |
publisher |
HAL CCSD |
publishDate |
2006 |
url |
https://hal.inrae.fr/hal-02816400 |
op_coverage |
Beijing, China |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
2. International Young Scientits' Global Change Conference https://hal.inrae.fr/hal-02816400 2. International Young Scientits' Global Change Conference, Nov 2006, Beijing, China. pp.1 |
op_relation |
hal-02816400 https://hal.inrae.fr/hal-02816400 PRODINRA: 13979 |
_version_ |
1766135334249168896 |