Supporting management decision-making in the dam-free Sélune River project (France): useful taxonomic and functional successional patterns

International audience The removal of the two hydroelectric Sélune River dams (Normandy, West of France) –36m and 16m high, is expected by 2019 and 2021 respectively. It is a unique European renaturation project freeing an entire coastal river. This study, part of a global scientific program, focuse...

Full description

Bibliographic Details
Main Authors: Ravot, Charlotte, Laslier, Marianne, Müller, Isabelle, Hubert-Moy, Laurence, Dufour, Simon, Rodríguez González, Patricia M., Bernez, Ivan
Other Authors: Biodiversité agroécologie et aménagement du paysage (UMR BAGAP), Institut National de la Recherche Agronomique (INRA)-AGROCAMPUS OUEST, Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Ecole supérieure d'Agricultures d'Angers (ESA), Écologie et santé des écosystèmes (ESE), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro), Littoral, Environnement, Télédétection, Géomatique UMR 6554 (LETG), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-Université d'Angers (UA)-École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Brest (UBO)-Université de Rennes 2 (UR2), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Géographie et d'Aménagement Régional de l'Université de Nantes (IGARUN), Université de Nantes (UN)-Université de Nantes (UN), Instituto Superior de Agronomia, Centro de Estudos Florestais, SERIPAGE
Format: Conference Object
Language:English
Published: HAL CCSD 2018
Subjects:
Online Access:https://hal.inrae.fr/hal-02735178
id ftccsdartic:oai:HAL:hal-02735178v1
record_format openpolar
institution Open Polar
collection Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
op_collection_id ftccsdartic
language English
topic Functional ecology
Passive ecological restoration
Riparian vegetation & communities
[SDE.BE]Environmental Sciences/Biodiversity and Ecology
spellingShingle Functional ecology
Passive ecological restoration
Riparian vegetation & communities
[SDE.BE]Environmental Sciences/Biodiversity and Ecology
Ravot, Charlotte
Laslier, Marianne
Müller, Isabelle
Hubert-Moy, Laurence
Dufour, Simon
Rodríguez González, Patricia M.
Bernez, Ivan
Supporting management decision-making in the dam-free Sélune River project (France): useful taxonomic and functional successional patterns
topic_facet Functional ecology
Passive ecological restoration
Riparian vegetation & communities
[SDE.BE]Environmental Sciences/Biodiversity and Ecology
description International audience The removal of the two hydroelectric Sélune River dams (Normandy, West of France) –36m and 16m high, is expected by 2019 and 2021 respectively. It is a unique European renaturation project freeing an entire coastal river. This study, part of a global scientific program, focuses on 19kms of river stretch (the first disappearing lake’s length). Since 2015, the usual 1m summer tidal range of the Vezins impoundment is not established anymore in order to make sediment management easier during the emptying. Between early 2017 and late summer 2018, the water table has been slowly reduced to conduct these 700 000 m3 sediment flow prevention engineering works. The floodplain progressively goes back to its normal course. Hectares of dewatered muds were rapidly colonized by spontaneous vegetation over the following months. The former lake is slowly being replaced by a river meandering through resurgent fields and wetlands. The 4-year emptying has made a close vegetation change monitoring possible, highlighting how to ecologically restore the valley. This 2015 to 2018 survey is based on spatial (lateral and longitudinal variations) and temporal (intra- and inter-annual shifts) observations of riparian vegetation communities. The aim is to predict the vegetation’s ability to passively and ecologically restore the riparian area of the new Sélune River. It focuses on three axis: i) the temporal dynamics of the colonizing species, ii) the influence of environmental variables in spatially structuring communities, and iii) the functional successional patterns of the process. Species traits related to colonization and sediment stabilization potentials within the habitat mosaic are treated. We discuss how management decisions related to the ecological restoration of the valley could be supported by the community ecology and trait data obtained. Finally, we suggest prioritizing passive restoration issues according to the functions assigned in this new valley.
author2 Biodiversité agroécologie et aménagement du paysage (UMR BAGAP)
Institut National de la Recherche Agronomique (INRA)-AGROCAMPUS OUEST
Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Ecole supérieure d'Agricultures d'Angers (ESA)
Écologie et santé des écosystèmes (ESE)
Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)
Littoral, Environnement, Télédétection, Géomatique UMR 6554 (LETG)
Université de Caen Normandie (UNICAEN)
Normandie Université (NU)-Normandie Université (NU)-Université d'Angers (UA)-École pratique des hautes études (EPHE)
Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Brest (UBO)-Université de Rennes 2 (UR2)
Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Géographie et d'Aménagement Régional de l'Université de Nantes (IGARUN)
Université de Nantes (UN)-Université de Nantes (UN)
Instituto Superior de Agronomia, Centro de Estudos Florestais
SERIPAGE
format Conference Object
author Ravot, Charlotte
Laslier, Marianne
Müller, Isabelle
Hubert-Moy, Laurence
Dufour, Simon
Rodríguez González, Patricia M.
Bernez, Ivan
author_facet Ravot, Charlotte
Laslier, Marianne
Müller, Isabelle
Hubert-Moy, Laurence
Dufour, Simon
Rodríguez González, Patricia M.
Bernez, Ivan
author_sort Ravot, Charlotte
title Supporting management decision-making in the dam-free Sélune River project (France): useful taxonomic and functional successional patterns
title_short Supporting management decision-making in the dam-free Sélune River project (France): useful taxonomic and functional successional patterns
title_full Supporting management decision-making in the dam-free Sélune River project (France): useful taxonomic and functional successional patterns
title_fullStr Supporting management decision-making in the dam-free Sélune River project (France): useful taxonomic and functional successional patterns
title_full_unstemmed Supporting management decision-making in the dam-free Sélune River project (France): useful taxonomic and functional successional patterns
title_sort supporting management decision-making in the dam-free sélune river project (france): useful taxonomic and functional successional patterns
publisher HAL CCSD
publishDate 2018
url https://hal.inrae.fr/hal-02735178
op_coverage Reykjavik, Iceland
genre Iceland
genre_facet Iceland
op_source SER Europe Conference 2018 Restoration in the Era of Climate Change
https://hal.inrae.fr/hal-02735178
SER Europe Conference 2018 Restoration in the Era of Climate Change, Sep 2018, Reykjavik, Iceland
https://archives-publications.inrae.fr/465229
op_relation hal-02735178
https://hal.inrae.fr/hal-02735178
PRODINRA: 465229
_version_ 1766042245898698752
spelling ftccsdartic:oai:HAL:hal-02735178v1 2023-05-15T16:52:07+02:00 Supporting management decision-making in the dam-free Sélune River project (France): useful taxonomic and functional successional patterns Ravot, Charlotte Laslier, Marianne Müller, Isabelle Hubert-Moy, Laurence Dufour, Simon Rodríguez González, Patricia M. Bernez, Ivan Biodiversité agroécologie et aménagement du paysage (UMR BAGAP) Institut National de la Recherche Agronomique (INRA)-AGROCAMPUS OUEST Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Ecole supérieure d'Agricultures d'Angers (ESA) Écologie et santé des écosystèmes (ESE) Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro) Littoral, Environnement, Télédétection, Géomatique UMR 6554 (LETG) Université de Caen Normandie (UNICAEN) Normandie Université (NU)-Normandie Université (NU)-Université d'Angers (UA)-École pratique des hautes études (EPHE) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Brest (UBO)-Université de Rennes 2 (UR2) Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Géographie et d'Aménagement Régional de l'Université de Nantes (IGARUN) Université de Nantes (UN)-Université de Nantes (UN) Instituto Superior de Agronomia, Centro de Estudos Florestais SERIPAGE Reykjavik, Iceland 2018-09-09 https://hal.inrae.fr/hal-02735178 en eng HAL CCSD hal-02735178 https://hal.inrae.fr/hal-02735178 PRODINRA: 465229 SER Europe Conference 2018 Restoration in the Era of Climate Change https://hal.inrae.fr/hal-02735178 SER Europe Conference 2018 Restoration in the Era of Climate Change, Sep 2018, Reykjavik, Iceland https://archives-publications.inrae.fr/465229 Functional ecology Passive ecological restoration Riparian vegetation & communities [SDE.BE]Environmental Sciences/Biodiversity and Ecology info:eu-repo/semantics/conferenceObject Conference papers 2018 ftccsdartic 2021-12-25T23:41:07Z International audience The removal of the two hydroelectric Sélune River dams (Normandy, West of France) –36m and 16m high, is expected by 2019 and 2021 respectively. It is a unique European renaturation project freeing an entire coastal river. This study, part of a global scientific program, focuses on 19kms of river stretch (the first disappearing lake’s length). Since 2015, the usual 1m summer tidal range of the Vezins impoundment is not established anymore in order to make sediment management easier during the emptying. Between early 2017 and late summer 2018, the water table has been slowly reduced to conduct these 700 000 m3 sediment flow prevention engineering works. The floodplain progressively goes back to its normal course. Hectares of dewatered muds were rapidly colonized by spontaneous vegetation over the following months. The former lake is slowly being replaced by a river meandering through resurgent fields and wetlands. The 4-year emptying has made a close vegetation change monitoring possible, highlighting how to ecologically restore the valley. This 2015 to 2018 survey is based on spatial (lateral and longitudinal variations) and temporal (intra- and inter-annual shifts) observations of riparian vegetation communities. The aim is to predict the vegetation’s ability to passively and ecologically restore the riparian area of the new Sélune River. It focuses on three axis: i) the temporal dynamics of the colonizing species, ii) the influence of environmental variables in spatially structuring communities, and iii) the functional successional patterns of the process. Species traits related to colonization and sediment stabilization potentials within the habitat mosaic are treated. We discuss how management decisions related to the ecological restoration of the valley could be supported by the community ecology and trait data obtained. Finally, we suggest prioritizing passive restoration issues according to the functions assigned in this new valley. Conference Object Iceland Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)