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Conservation de la biodiversité et changement climatique, un nécessaire changement de paradigme Le cas des poissons migrateurs amphihalins

Authors: Rochard, Eric; Lassalle, Géraldine;

Conservation de la biodiversité et changement climatique, un nécessaire changement de paradigme Le cas des poissons migrateurs amphihalins

Abstract

La conservation de la biodiversité est un concept récent qui s'appuie pourtant pour l'essentiel sur des directives européennes ou des conventions internationales qui ne considèrent pas la dynamique des systèmes écologiques. Jusqu'à lors, il s'agissait donc de retrouver une situation antérieure jugée plus satisfaisante pour une espèce, un habitat ou un écosystème. Le changement climatique en cours impose de changer de stratégie, car dans certains cas, il ne sera pas possible de retrouver cette situation antérieure (température, précipitations). Cela nécessite de réviser la localisation géographique des mesures de conservation envisagées et d'amplifier les mesures visant à faciliter le repositionnement des espèces (amélioration de la connectivité). Au-delà des interrogations sur les scénarios climatiques considérés comme valeur d'entrée, ces résultats chamboulent les logiques installées et questionnent sur l'opportunité de certaines mesures spécifiques quand les modèles prévisionnels ne garantissent pas les conditions d'existence d'une espèce. / The conservation of biodiversity is a recent concept which is mainly based on European directives and international conventions which do not consider the dynamic nature of ecological systems. Up to now, the aim was to restore a historical situation judged more satisfactory for a species, a habitat or an ecosystem. The ongoing climate change imposes a change of strategy because in some cases it will not be possible to restore the previous situation (temperature, precipitations). It is necessary to revise the geographical location of planned conservation measures and to amplify the measures facilitating the repositioning of species (improvement of connectivity). Beyond the questions on the climate scenarios used as input, these results overturn current rationales and raise serious questions concerning certain specific measures when projection models do not guarantee survival conditions for a particular species.

Country
France
Keywords

[SDE] Environmental Sciences, BIODIVERSITE, espèce migratrice, Environmental technology. Sanitary engineering, biodiversité, Environmental sciences, changement climatqiue, poisson, CHANGEMENT CLIMATIQUE, [SDE]Environmental Sciences, GE1-350, ESPECE MIGRATRICE, TEMPERATURE, REPARTITION GEOGRAPHIQUE, TD1-1066, POISSON

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    popularity
    This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
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    influence
    This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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    This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
1
Average
Average
Average
Green
gold