Dynamique de la Tulipe sauvage (Tulipa sylvestris L. subsp. sylvestris) en fonction des pratiques agricoles, sur la commune de Die (Drôme)

Abstract : The wild Tulip (Tulipa sylvestris L. ssp. sylvestris) is a messicole species, protected at the national level. In the department of Drôme (26), on the municipality of Die, about 900 000 individuals were inventoried by the CBNA in 2009. In front of a number of increasing dispensation request for destruction of this protected species, a management plan arranged by the various actors of the territory was set up with the aim of protecting it. The annual followup of the populations is made to understand the link between the dynamics of the wild Tulip and the local agricultural practices. Three working hypotheses were formulated and predict : a favorable effect of the organic farming, a long-term negative impact of a spring plowing, and a significant importance of the crop on the expression of the wild Tulip. The follow-up was realized in period of blooming, according to the national protocol established by the CBNA. As the outcome of the analysis of the results, several elements were able to be put forward : no detectable difference between the organic farming and the conventional farming, no shortterm negative impact of a spring plowing, and the type of crop is actually an explanatory important factor of the expression of the species. However, to protect the wild Tulipe, the follow-up of populations and the agricultural practices has to continue at least the time of a complete cultural rotation to acquire the step backwards necessary for the understanding of this symbolic patrimonial species of Diois.
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Master thesis
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http://docnum.univ-lorraine.fr/public/BUS_M_2014_LEBIHAN_CAMILLE.pdf
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Camille Le Bihan. Dynamique de la Tulipe sauvage (Tulipa sylvestris L. subsp. sylvestris) en fonction des pratiques agricoles, sur la commune de Die (Drôme). Sciences de l'environnement. 2014. ⟨hal-01836194⟩

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