Preferential habitat of aquatic birds in restored wetland

Comín, F. A. and Romero, J. A. and Hernández, O. and García, C. (1997) Preferential habitat of aquatic birds in restored wetland. MAGYAR VÍZIVAD KÖZLEMÉNYEK, 3. pp. 337-350. ISSN 1416-1389 (nyomtatott); 1419-6107 (elektronikus)

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Abstract

Aquatic birds were counted in different experimental wetlands located in the Ebro Delta (NE Spain) every two hours for one aav, every month from May to September in order to identify preferential habitats of waterfowl in wetlands restored from ricefields. Emergent, floating and submerged vegetation and macroinveriebrates were monitored together nutrient content in the sediments as characteristics defining the habitat status for bird utilization The number of individuals of the different species observed (Anas platyrhynchos, Gallinula chloropus, Fulica atra, Ixobrychus minutus, Himanlopus himantopus, Bubulcus ibis, Ardea purpurea) was, m general, higher during the early and late hours of the day than at midday. A higher number of birds of the various species was observed in the wetlands on which Typha plants were the dominant vegetation compared to those where Phragmites were dominant. The number of birds was lower in the wetlands with short emergent vegetation (including ricefields) than in the wetlands with tail emergent vegetation Protection by tali emergent vegetation, open areas in the vegetation and relatively deep water are the major factors favouring the presence of waterbirds in the experimental wetlands.

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