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 TERMINÉ 
Background Alder forests (Alnus glutinosa) commonly grow on the banks of rivers with permanent water flows. This habitat is at its optimum in the middle of river courses. Past human activity has led to a reduction of many alder forests and much of this habitat is now limited to thin rows of trees located in single lines directly at the riparian edge. ...
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 TERMINÉ 
Background Calcareous habitats are characteristically alkaline. Calcareous literally means being mostly or partly composed of calcium carbonate, or in other words, containing lime or being chalky. Calcareous conditions are of vital importance for the conservation of several taxa and their habitats. The SCI of Serra de Aires e Candeeiros includes one of P ...
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