Abstract
The factors regulating the distribution of dabbling and diving waterbirds were studied, taking into account habitat selection by the species in a wetland complex of 26 ponds in south-eastern Spain. Such information can be used to management and conservation of wetland threatened bird species. Direct counts and feeding-microhabitat surveys of waterbirds were conducted. The feeding-niche width and the feeding-microhabitat use, as a function of the horizontal spatial gradient in the ponds, were related to the mean size of ponds used for each species. While the more generalist birds, which usually feed close to the shore, probably had available resources in small ponds, specialists that also frequently selected central zones of the pond had proportionally more limited feeding space and, therefore, less resource availability in small ponds. The differences in habitat selection of the different species appeared to encourage their hierarchical disappearance from the wetland complex at the same rate as the ponds diminished in size (‘nested’ pattern). The results support the conservation, restoration or creation of, at least, ponds of greater size in order to preserve extensive open-water zones in the wetlands and maintain the greatest number of specialist, threatened, and area-dependent species, such as the globally endangered White-headed Duck (Oxyura leucocephala).
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Paracuellos, M. How can Habitat Selection Affect the use of a Wetland Complex by Waterbirds?. Biodivers Conserv 15, 4569–4582 (2006). https://doi.org/10.1007/s10531-005-5820-z
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DOI: https://doi.org/10.1007/s10531-005-5820-z