Dataset 602

Bulgaria Wintering Waterbirds, Lake Complexes

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Realm: Freshwater
Climate: Temperate
Biome: Small Lake Ecosystems
Central latitude: 42.416687
Central longitude: 27.636080
Duration: 41 years, from 1976 to 2017

1532 records

76 distinct species

Across the time series Fulica atra is the most frequently occurring species

Methods

Wintering water birds are counted each year in the middle of January along defined transects. The counting is done along the wetland shores by foot and with cars, using fieldscopes and binoculars with an observation distance of 1000-2000 meters from transect. Several points with easy access to the water body are chosen. The same points are visited each year and for each site a separate protocol is filled in. All protocols are then combined into a single dataset for the water body. Geese are counted early in the morning when the birds fly towards their feeding grounds. The other water birds are counted during the day. Study area: 1) Alepu L.C.: a lagoon with an area of 1.13 sq. km; the site includes also 4 km of the adjacent sea coast; 2) Arkutino L.C.: a lagoon with an area of 0.26 sq. km; the site includes also 5 km of the adjacent sea coast; 3) Atanasovsko L.C.: the lake complex has an area of 14.76 sq. km., in the study are included the south and north part of the lake, as well as 7 km of the adjacent sea coast north of Bourgas City.

Citation(s)

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