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Les pelouses calcicoles de Lorraine : étude phytosociologique et écologique impact de la gestion sur les populations végétales

Abstract : This study is made of thee parts. The first part deals with a phytosociological description of the Mesobromion syntaxon in Lorraine, which was established Eom 340 new fioristic list. Five main groups are to be distinguished , which correspond to the five known sub-alliances, i.e.. the Sesterio-Mesobromenion (represented by the Genisto-Seslerietum and its eight suballiances), the Teucrio-Mesobromenion (represented by the Festuco lemanii-Brometum and its three sub-alliances), the Eu-Mesobromenion (represented by the Onobiychido-Brometum and its four sub-alliances), the Tetragonolobo-Mesobromenion (represented by the Chloro- Brometum and its three sub-alliances) and the Chamaespartio-Agrostidenion (represented by the SiegIingio- Brachypodetium and its two sub-alliances). The second part of the study is an analysis of the vegetation successional dynamic, linked with the evolution of the Raunkier biological types, the specific diversity, the evolution of the morphologic attributes (stalks, leaves, flowers) of Teucrium chamaediys. The conclusions of this part are used for the analysis of the resdts described in the following two parts. The third and fourth parts respectively deal with the impact of the cutting and grazing which are calculated in the three most cornmon vegetation groups in the Moselie valley (Festuco lemanii-Brometum) and two sub-alliances of the Onobiychido-Brometum. The impact of these two types of management on the vegetation is very dxerent in each of these vegetation groups. The types of conservation management are proposed in order to manage in a rational way these biotops which are threatened to disappear in Lorraine
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https://hal.univ-lorraine.fr/tel-01775766
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Submitted on : Tuesday, April 24, 2018 - 3:42:19 PM
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  • HAL Id : tel-01775766, version 1

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Frédéric Pautz. Les pelouses calcicoles de Lorraine : étude phytosociologique et écologique impact de la gestion sur les populations végétales. Biologie végétale. Université Paul Verlaine - Metz, 1999. Français. ⟨NNT : 1999METZ061S⟩. ⟨tel-01775766⟩

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