{"id":222,"date":"2021-01-16T06:01:00","date_gmt":"2021-01-16T06:01:00","guid":{"rendered":"https:\/\/odonates.net\/odofrance\/?p=222"},"modified":"2026-09-20T03:17:58","modified_gmt":"2026-09-20T03:17:58","slug":"remeandrage-et-explosion-de-la-faune-odonatologique-a-la-reserve-naturelle-du-pinail","status":"publish","type":"post","link":"https:\/\/odonates.net\/odofrance\/?p=222","title":{"rendered":"Rem\u00e9andrage et explosion de la faune odonatologique \u00e0 la R\u00e9serve Naturelle du Pinail"},"content":{"rendered":"\n
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Beaune D. & Sellier Y. 2021<\/strong> \u2013 Stream restorations with meanders increase dragonfly and damselfly diversity and abundance, including an endangered species. \u2013 J. for Nature Conservation,<\/em> 12 janvier 2021.<\/p>\n<\/blockquote>\n\n\n\n

R\u00e9sum\u00e9<\/strong> (traduction libre)<\/p>\n\n\n\n

Titre<\/span> – La restauration de cours d\u2019eau avec rem\u00e9andrage augmente la diversit\u00e9 et l\u2019abondance des libellules et demoiselles, incluant une esp\u00e8ce menac\u00e9e.<\/p>\n\n\n\n

Cette \u00e9tude pr\u00e9sente des exemples de projets de restauration r\u00e9ussis pour la conservation de la biodiversit\u00e9. Dans l\u2019Ouest de la France, la r\u00e9serve naturelle nationale du Pinail<\/strong> est une zone humide prot\u00e9g\u00e9e parsem\u00e9e de plus de 6000 mares. Cette zone humide est habit\u00e9e par 50 esp\u00e8ces d\u2019Odonates et constitue donc une zone de biodiversit\u00e9 cl\u00e9 pour la conservation des demoiselles et des libellules. Dans le pass\u00e9, lorsque le calcaire \u00e9tait exploit\u00e9, les cours d\u2019eau du plateau \u00e9taient artificiellement canalis\u00e9s de fa\u00e7on rectiligne, pour se jeter dans la Vienne. Finalement, les cours d\u2019eau ont \u00e9t\u00e9 bloqu\u00e9s par la biomasse et les s\u00e9diments, ce qui a eu pour effet de faire couler l\u2019eau principalement sous terre. En 2011, deux projets de restauration ont permis de creuser et de recr\u00e9er des habitats perdus tels que des cours d\u2019eau et des m\u00e9andres en reconnectant ouvertement des masses d\u2019eau stagnante (deux sites sont concern\u00e9s : ruisseaux Rivau (20 m) et Hutte (400 m)). La diversit\u00e9 et l\u2019abondance des esp\u00e8ces d\u2019Odonata sont surveill\u00e9es chaque ann\u00e9e \u00e0 la suite d\u2019inventaires par transect depuis 1995 et toujours en cours. La diversit\u00e9 et l\u2019abondance ont \u00e9t\u00e9 compar\u00e9es avant et apr\u00e8s la restauration. L\u2019abondance et la diversit\u00e9 des esp\u00e8ces ont augment\u00e9 sur les deux sites en raison de l\u2019ajout d\u2019habitats lotiques et donc de nouvelles esp\u00e8ces suppl\u00e9mentaires. Le nombre d\u2019esp\u00e8ces observ\u00e9es a presque doubl\u00e9 sur le Rivau (de 5,4 esp\u00e8ces observ\u00e9es \u00e0 9,9 spp). Par extrapolation, le nombre total d\u2019esp\u00e8ces sur le site est pass\u00e9 de 15-18 spp \u00e0 29-37 spp. L\u2019abondance a \u00e9galement fortement augment\u00e9 avec 770 % d\u2019individus suppl\u00e9mentaires sur le cour d\u2019eau. De m\u00eame, sur le ruisseau Hutte de 400 m, la diversit\u00e9 extrapol\u00e9e est pass\u00e9e de 31-38 spp \u00e0 35-43 spp ; ainsi que l\u2019abondance avec 475% d\u2019individus en plus. Ces projets de restauration ont cr\u00e9\u00e9 de nouveaux habitats, ce qui a permis d\u2019enrichir la biodiversit\u00e9 locale et d\u2019assurer la r\u00e9ussite de la conservation. Plus pr\u00e9cis\u00e9ment, Coenagrion mercuriale<\/strong><\/em> (Odonata : Zygoptera), une des demoiselles les plus menac\u00e9es d\u2019Europe et inscrite sur la liste de la directive europ\u00e9enne \u00ab Habitats \u00bb, a r\u00e9ussi \u00e0 recoloniser le ruisseau du Rivau et \u00e0 coloniser le ruisseau Hutte.<\/p>\n\n\n\n

\n\n\n\n

Abstract <\/strong><\/p>\n\n\n\n

This study presents examples of successful restoration projects for biodiversity conservation. In West France,\u00a0the Pinail National Nature Reserve<\/strong>\u00a0is a protected wetland interspersed with more than 6000 ponds. This wetland is inhabited by 50 species of Odonata and thus is a key biodiversity area for damselflies and dragonflies conservation. In the past, when the limestone was exploited, the streams of the plateau were artificially channeled rectilinearly, running to the Vienne River. Eventually streams were blocked by biomass and sediments resulting in water flowing mainly underground. In 2011, two restoration projects dug and recreated lost habitats such as running streams and meanders by openly reconnecting bodies of standing water (two sites: Rivau (20\u2009m) and Hutte (400\u2009m) streams). The Odonata species diversity and abundance are annually monitored following transect inventories since 1995 and still ongoing. Diversity and abundance were compared before and after the restoration. The abundance and species diversity increased at both sites due to the addition of lotic habitats and consequently additional new species. The number of observed species almost doubled on the Rivau (from 5.4 observed species to 9.9 spp). By extrapolation the total species number on site increased from 15-18 spp to 29-37 spp. The abundance also greatly increased with 770% more individuals on the Rivau. Similarly, on the 400\u2009m Hutte stream, the extrapolated diversity increased from 31-38 spp to 35-43 spp; as well as the abundance with 475% more individuals. These restoration projects created new habitats leading to local biodiversity enrichment and conservation success. More specifically,\u00a0Coenagrion mercuriale<\/strong><\/em>\u00a0(Odonata: Zygoptera), one of Europe\u2019s most threatened damselflies and listed in the European Habitats directive, successfully recolonized the Rivau stream and colonized the Hutte stream.<\/p>\n","protected":false},"excerpt":{"rendered":"

Beaune D. & Sellier Y. 2021 \u2013 Stream restorations with meanders increase dragonfly and damselfly diversity and abundance, including an endangered species. \u2013 J. for Nature Conservation, 12 … <\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[30,28,27],"tags":[],"class_list":["post-222","post","type-post","status-publish","format-standard","hentry","category-coenagrion-mercuriale","category-gestion-des-habitats","category-vienne"],"_links":{"self":[{"href":"https:\/\/odonates.net\/odofrance\/index.php?rest_route=\/wp\/v2\/posts\/222","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/odonates.net\/odofrance\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/odonates.net\/odofrance\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/odonates.net\/odofrance\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/odonates.net\/odofrance\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=222"}],"version-history":[{"count":2,"href":"https:\/\/odonates.net\/odofrance\/index.php?rest_route=\/wp\/v2\/posts\/222\/revisions"}],"predecessor-version":[{"id":224,"href":"https:\/\/odonates.net\/odofrance\/index.php?rest_route=\/wp\/v2\/posts\/222\/revisions\/224"}],"wp:attachment":[{"href":"https:\/\/odonates.net\/odofrance\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=222"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/odonates.net\/odofrance\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=222"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/odonates.net\/odofrance\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=222"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}