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Fieldwork results of wader research stations working in Poland in 2002-2003

100%

Sciborski M., Meissner W., Krupa R., Wlodarczyk R., Kaczmarek K., Bargiel R., Wojciechowski A., Raniczkowska A., Kozik R., Pietrasik J.

The Ring

2005

tom 27

nr 1

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Current distribution, abundance and trends of the Caspian Gull Larus cachinnans in Poland

81%

Przymencki M., Litwiniak K., Betleja J., Neubauer G., Ledwon M., Bednarz L., Szymczak J., Sidelnik M., Grochowski P., Pomorska-Grochowska J., Kołodziejczyk P., Pietrasik J., Stawarczyk J.

Ornis Polonica

2022

tom 63

nr 1

Caspian Gull Larus cachinnans started to nest in Poland in the early 1980s. Since 1989 this species has started to nest regularly, but no complete survey of breeding population has been done so far. To describe abundance trend, we collected data on numbers and distribution of breeding Caspian Gulls until 2020 from the whole country. The census in 2021 allowed to estimate complete or near-complete breeding population at 5,554 pairs nesting in 44 places in total. Nesting sites held from 1 to 1,924 breeding pairs. About 91% of pairs bred in 9 colonies with more than 100 pairs. There were 21 nesting sites with ≤10 pairs, including 10 single-pair sites. 66% of the sites were located in southern part of the country, but increasingly more pairs started to settle in new places, including central Poland. The average annual population growth rate in 1989–2021 was estimated at 14.8% (95% confidence intervals: 12.3–17.3%); the Caspian Gull is characterized by the strongest increase among all breeding bird species in Poland. We predict that the abundance of Caspian Gulls in Poland will further increase, as many potentially suitable breeding areas are not yet colonized, particularly in the northern and western part of the country. This spectacular increase is also probably linked to multiple factors, including availability of landfills as important foraging places, which may affect high productivity and survival. The case of the Caspian Gull population increase is a good example of large-scale changes in bird populations in the period of Anthropocene in Europe.

Ograniczanie wyników

1 Ornis Polonica

1 The Ring

2 Pietrasik J.

1 Bargiel R.

1 Bednarz L.

1 Betleja J.

1 Grochowski P.

1 Kaczmarek K.

1 Kozik R.

1 Kołodziejczyk P.

1 Krupa R.

1 Ledwon M.

1 Litwiniak K.

1 Meissner W.

1 Neubauer G.

1 Pomorska-Grochowska J.

1 Przymencki M.

1 Raniczkowska A.

1 Sciborski M.

1 Sidelnik M.

1 Stawarczyk J.

1 Szymczak J.

1 Wlodarczyk R.

1 Wojciechowski A.

1 2022

1 2005

Wyniki wyszukiwania

Fieldwork results of wader research stations working in Poland in 2002-2003

Current distribution, abundance and trends of the Caspian Gull Larus cachinnans in Poland