Résumé :
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In general, factors responsible for losses and degradation of wetlands areas in Sardinia (and also worldwide) include disconnecting floodplain wetlands from flood flows, eutrophication, pollution, overgrazing, harvesting plants and animals, global warming, invasions of exotics, and the practices of filling, dying and draining, and habitat fragmentation due to the construction of road and harbour facilities. Eutrophication is widespread, which, together with effects of invasive species, reduces biotic complexity. The effects of urbanization will be detailed below in this section. For their multiple ecosystem services, the need for wetland conservation is widely recognized (i.e. the Ramsar Convention, Ramsar 2013) but has long been challenged by national development policies and short-term economic/politics priorities. Thus, drainage and conversion to an extensive agriculture are presently turning wetlands into deep anthropogenic landscapes and doing habitats change at too accelerating pace to have the chance of resilience. Generalizations and trends gleaned from this project should be considered as a starting point for developing world-scale data sets.
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