Liczebność ptaków wodnych na Zatoce Gdańskiej w okresie wrzesień 2018–kwiecień 2019

• Autorzy: Meissner W. , Stepniewska K. , Kaszak S. , Kosmicki A. , Janczyszyn A. , Kozakiewicz M.

Warianty tytułu

EN

Numbers of waterbirds on the Bay of Gdańsk between September 2018 and April 2019. I

• Języki publikacji: PL

Abstrakty

EN

In autumn bird numbers were low. In winter the most abundant species was the Common Goldeneye Bucephala clangula, whose numbers peaked in January at 15.922 individuals. The numbers of Mallards Anas platyrhynchos and Eurasian Coots Fulica atra have been the highest in the 35-year period of waterbird counts in the Bay of Gdańsk. In contrast, the number of wintering Common Mergansers Mergus merganser has been declining during last three years, and values found during last winter are among the lowest values recorded during last 20 years. An important decline of this species may result from climate-driven shifts in wintering ranges in a northerly direction (N and NE). A very mild winter of 2018/2019 was responsible for relatively high numbers of several other species: more than 100 Eurasian Wigeons Mareca penelope and Grey Herons Ardea cinerea, three Pintails A. acuta and three Gadwalls M. strepera and exceptionally large flock of geese Anser sp. were observed. During severe winters these species do not occur at the Bay of Gdańsk or their numbers are very low. Numbers of gulls, including the dominating the European Herring Gull Larus argentatus, were higher than in the previous winter season, but much lower than at the beginning of this century. One of the main reasons responsible for this decline is probable the shrinkage of the storage area of unsorted waste, widely used by gulls as a foraging site.

Słowa kluczowe

PL

ornitologia; ptaki wodne; ptaki; gatunki zwierzat; liczebnosc; obserwacje; Zatoka Gdanska

• Wydawca: -
• Czasopismo: Ornis Polonica
• Rocznik: 2019
• Tom: 60
• Numer: 3
• Opis fizyczny: s.227-233,tab.,wykr.,bibliogr.

Twórcy

autor

Meissner W.

• Pracownia Ekofizjologii Ptaków, Katedra Ekologii i Zoologii Kręgowców, Uniwersytet Gdański, Wita Stwosza 59, 80-308 Gdańsk

autor

Stepniewska K.

• Pracownia Ekofizjologii Ptaków, Katedra Ekologii i Zoologii Kręgowców, Uniwersytet Gdański, Wita Stwosza 59, 80-308 Gdańsk

autor

Kaszak S.

• Miejski Ogród Zoologiczny Wybrzeża Karwieńska 3; 80-328 Gdańsk

autor

Kosmicki A.

• Grupa Badawcza Ptaków Wodnych KULING Kruczkowskiego 15 C/9, 80-288 Gdańsk

autor

Janczyszyn A.

• Grupa Badawcza Ptaków Wodnych KULING Żołnierzy 1A/C, 82-120 Krynica Morska

autor

Kozakiewicz M.

• Grupa Badawcza Ptaków Wodnych KULING 3 Maja 57b/12, 81-850 Sopot