Abstract
We develop a “case model” approach to investigate how conservation measures may affect the ecology of a community module, defined as a small number of tightly interacting species. The community module consists of a parasitic butterfly and its two hosts, a plant and an ant. The butterfly Maculinea alcon and its host plant Gentiana pneumonanthe have long been used as indicators of high-quality Palearctic heath and moist grassland ecosystems, and both species have been targeted for ecological research and specific conservation management. We constructed a mechanistic model of this community module, including dynamics for the three species, and conducted simulation studies of different conservation strategies (burning, sod cutting, mowing, and grazing). We identified several key parameters for the conservation of Maculinea alcon and its host plant as well as the most efficient conservation strategies for their dual long-term persistence. Our results show that the conditions that optimize the size of the butte...
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