Effects of submerged change on wintering waterfowl in the Comacchio area

Boldreghini, Paolo and Santolini, Riccardo (1997) Effects of submerged change on wintering waterfowl in the Comacchio area. MAGYAR VÍZIVAD KÖZLEMÉNYEK, 3. pp. 107-112. ISSN 1416-1389 (nyomtatott); 1419-6107 (elektronikus)

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Abstract

The Comacchio area is a major wetland complex for wintering waterbirds (as well as for breeding and migrating ones). Its importance for wintering waterfowl has been emphasized by various national reports for 1975-77 (Boldreghini el aL, 1978, Schenk, 1979), 1975-78 (Chelini, 1979) and 1982-85 (Focardi and Spina, 1986) Information on wintering waterfowl in the coastal wetlands of the Emilia-Romagna Region is given by Boldreghini and Montanan (1978) and recently by Boldreghini (1990). Populations of wintering ducks and Fulica atra in the coastal wetlands of the north-western Adriatic Sea over the period 1975-82 have been analysed by Boldreghini and Rallo (1988) and discussed in order to assess the international or national importance of these wetlands. Population trends of wintering waterfowl since 1974 are given by Boldreghini et al. (1992) A strong decrease of wintering waterfowl has been recorded during the early 1980s. The aim of this paper is to discuss the ecological factors likely causing this population change.

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