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BILAN DU SUIVI SCIENTIFIQUE 2015 DU SITE NATURA 2000 - FR1102005 « Rivières Du Loing Et Du Lunain »

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BILAN DU SUIVI SCIENTIFIQUE 2015 DU SITE NATURA 2000 - FR1102005 « Rivières Du Loing Et Du Lunain » BILAN DU SUIVI SCIENTIFIQUE 2015 DU SITE NATURA 2000 - FR1102005 « Rivières du Loing et du Lunain » FEDERATION DE SEINE-ET-MARNE POUR LA PECHE ET LA PROTECTION DU MILIEU AQUATIQUE - FEVRIER 2016 REMERCIEMENTS Nous tenons à remercier tous les acteurs du site et organismes impliqués dans la préservation de l’environnement qui, par leur participation, ont permis l’actualisation des données du diagnostic écologique du site Natura 2000 : - La Communauté de communes Moret Seine-et-Loing, - Les élus des communes du site Natura 2000, - Les propriétaires et exploitants nous ayant permis d’accéder à leurs parcelles, - Jerome Hânol et Fréderic Asara de l’association Naturaliste de la Vallée du Loing et du Massif de Fontainebleau (ANVL), - Maxime Zucca et le conseil d’administration de Natureparif (Agence régionale pour la nature et la biodiversité en Île-de-France), Photo de couverture : Renoncules sp. sur un radier à Moret-sur-Loing © FDAAPPMA77. Bilan des suivis scientifiques 2015 du site Natura 2000 FR1102005 « Rivières du Loing et du Lunain » SOMMAIRE 1. PRESENTATION DU SITE NATURA 2000 .............................................................................................................................. 1 2. SUIVI ECOLOGIQUE DE L’HABITAT D’INTERET COMMUNAUTAIRE « FORETS ALLUVIALES A ALNUS GLUTINOSA ET FRAXINUS EXCELSIOR (ALNO-PADION, ALNION INCANAE, SALICION ALBAE) » SUR LES ILES DU LOING ...................................... 3 2.1. DESCRIPTIF DE L’HABITAT « FORETS ALLUVIALES » (DOCOB, 2012) ................................................................................................ 3 2.1.1. Description générale et écologie............................................................................................................................... 3 2.2. MATERIEL ET METHODE ........................................................................................................................................................... 3 Le matériel suivant a été utilisé : ................................................................................................................................................................ 4 2.3. RESULTATS ............................................................................................................................................................................ 6 2.3.1. L’île du Chêne rond, à Moret-sur-Loing..................................................................................................................... 6 2.3.1. L’île du Moulin de la Fosse, à Grez-sur-Loing ............................................................................................................ 6 2.3.2. L’Ile de Souppes-sur-Loing ........................................................................................................................................ 7 2.3.3. L’île de la Madeleine ................................................................................................................................................. 7 3. SUIVIS ECOLOGIQUES DE L’AGRION DE MERCURE (COENAGRION MERCURIALE) SUR LE SITE NATURA 2000 « RIVIERES DU LOING ET DU LUNAIN » .............................................................................................................................................................. 9 3.1. L’AGRION DE MERCURE (COENAGRION MERCURIALE).................................................................................................................... 9 3.2. SUIVI TEMPOREL DES LIBELLULES (STELI) .................................................................................................................................... 9 3.2.1. Matériel et méthode ................................................................................................................................................. 9 3.2.2. Etat général du peuplement d’odonates ................................................................................................................ 10 3.2.3. Etat de la population d’Agrion de Mercure ............................................................................................................ 11 3.3. LE SUIVI 2015 DES STATIONS D’AGRIONS DE MERCURE (COENAGRION MERCURIALE) IDENTIFIEES SUR LE SITE NATURA 2000 « RIVIERES DU LOING ET DU LUNAIN ». ...................................................................................................................................................................... 12 3.3.1. Matériel et méthode ............................................................................................................................................... 12 Méthode ................................................................................................................................................................................... 12 3.3.2. Résultats ................................................................................................................................................................. 14 3.3.3. Conclusions ............................................................................................................................................................. 18 4. SUIVI ECOLOGIQUE DES ESPECES PISCICOLES D’INTERET COMMUNAUTAIRE ................................................................... 19 4.1. EXIGENCES ECOLOGIQUES DES ESPECES DE LA DIRECTIVE « HABITATS, FAUNE, FLORE » ..................................................................... 19 4.1.1. Le Chabot (Cottus gobio) ........................................................................................................................................ 19 4.1.2. La Lamproie de Planer (Lampetra planeri) ............................................................................................................. 19 4.1.3. La Loche de rivière (Cobitis taenia) ......................................................................................................................... 20 4.1.4. La Bouvière (Rhodeus amarus) .............................................................................................................................. 20 4.2. INVENTAIRE PISCICOLE PAR PECHE ELECTRIQUE ........................................................................................................................... 21 4.2.1. Matériel et méthode ............................................................................................................................................... 21 4.2.2. Réseau des stations de pêches suivies sur le site .................................................................................................... 22 4.2.3. Interprétation des résultats .................................................................................................................................... 22 4.3. RESULTATS GLOBAUX SUR LE LOING .......................................................................................................................................... 25 4.4. RESULTATS PAR STATION SUR LE LOING ..................................................................................................................................... 27 4.4.1. Station Grez-sur-Loing : .......................................................................................................................................... 27 Espèces d’intérêt communautaire ............................................................................................................................................................ 29 4.4.2. Station 5 « La Baignade de Montigny » à La Genevraye : ...................................................................................... 30 Espèces d’intérêt communautaire ............................................................................................................................................................ 33 4.5. RESULTATS GLOBAUX SUR LE LUNAIN ........................................................................................................................................ 34 4.6. RESULTATS PAR STATION SUR LE LUNAIN ................................................................................................................................... 36 4.6.1. Station 3 « Le captage de Villeron à la Genevraye » .............................................................................................. 36 Espèces d’intérêt communautaire ............................................................................................................................................................ 38 4.6.2. Station 11 « Petit Moulin à Paley » : ....................................................................................................................... 39 Espèces d’intérêt communautaire ............................................................................................................................................................ 41 4.7. RESULTATS GENERAUX DES INVENTAIRES PISCICOLES .................................................................................................................... 42 5. OBSERVATIONS DE LA MULETTE EPAISSE (UNIO CRASSUS) SUR LE SITE ........................................................................... 42 5.1. EXIGENCES ECOLOGIQUES DE LA MULETTE EPAISSE ...................................................................................................................... 42 5.2. ETAT DES CONNAISSANCES SUR LE SITE NATURA 2000 ................................................................................................................
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