La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	The diversity and utilisation of spatial resources along a tropical lakeshore by Ciconiiformes
Auteurs :	P. M. B. Kasoma, Auteur
Type de document :	Article
Dans :	Ostrich (No number JUL 2001)
Article en page(s) :	136-140
Langues:	Anglais
Résumé :	The spatial distribution of a foraging ciconiform bird community along the shores of Lake Edward and Kazinga Channel in Queen Elizabeth National Park, Western Uganda was studied between May 1985 and December 1987. There was marked preference for terrestrial or aquatic foraging by different species, some, such as Cattle Egret, preferring terrestrial habitat whereas others preferred semi or fully aquatic habitats. Eight microhabitats were identified along the shores, two of which were created only during the wet season. Of the eleven species for which there are adequate data eight used more than half of the microhabitats at some point. Most species showed low microhabitat niche breadth values (ranging from 0.018 to 0.641 in the wet season and 0.042 to 0.536 in the dry season) indicating that they had a degree of specialisation. However, niche overlap values revealed that spatial resources are shared by most species. This might be the result of the limiting nature of the lakeshore habitat in the study area, in terms of available foraging space.

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