Zmiany liczebności wybranych lęgowych gatunków ptaków w tarasie zalewowym doliny dolnego Bugu w okresie 1984-2014
Journal Title: KULON - Year 2014, Vol 19, Issue
Abstract
In 2012-2014, the third inventory of selected bird species was conducted during the breeding season. Changes in the number of breeding pairs of 41 species were determined in the period 1984-2014. After three decades, significant changes in numbers of the majority of breeding species were noted. The progressive group comprised only 11 species: the Mute swan Cygnus olor, Whooper Swan Cygnus cygnus, Greylag Goose Anser anser, Goldeneye Bucephala clangula, White Stork Ciconia ciconia, Bittern Botaurus stellaris, Crane Grus grus, Marsh Harrier Circus aeruginosus, White-tailed Eagle Haliaeetus albicilla, White-winged Black Tern Chlidonias leucopterusand, and Stonechat Saxicola rubicola. Five species fluctuated: Goosander Mergus merganser, Common Sandpiper Actitis hypoleucos, and Curlew Numenius arquata – after an initial large increase, their numbers markedly declined in the last period, while the Black-headed Gull Chroicocephalus ridibundus and the Whiskered Tern Chlidonias hybrida occurred in unusually large numbers only in 2013. Much more species (23) considerably declined, and only two species did not show such tendency: the Gadwall Anas strepera and Black Tern Chlidonias nigra. Numbers of the White-winged Black Tern were highest during the 2010 and 2013 extensive river floods. Marked differences in numbers of waterbirds existed in hydrologically different seasons: 2013 (prolonged inundation of the valley) and 2014 (absence of spring flooding of the valley). Extensive flooding of the valley in the breeding season of 2013 enhanced 16 species. The breeding season of 2014, with lower flooding, enhanced 9 species occupying different habitat types, and 9 riverine species that in May-June 2013, occupied in low numbers the river channel and willow thickets on the river sides totally flooded at that time.
Authors and Affiliations
Andrzej Dombrowski, Artur Goławski, Zbigniew Kasprzykowski, Adam Dmoch, Marek Twardowski, Ewa Szczepankiewicz, Paweł Cieśluk, Robert Miciałkiewicz, Jarosław Zawadzki, Tomasz Smoleński, Emilia Mróz, Magdalena Sikora, Łukasz Trębicki, Maciej Omelaniuk, Mieczysław Kurowski, Krzysztof Mortka, Marcin Sidelnik
Keywords
Related Articles
- EP ID EP166405
- DOI -
- Views 113
- Downloads 0
STWIERDZENIE CORBICULA FLUMINEA (O. F. MÜLLER, 1774) (VENEROIDA: CORBICULIDAE) W WIŚLE W WARSZAWIE
Two empty shells of the Asian clam Corbicula fluminea were recorded on left bank of Vistula river in Warsaw (52°17’07”N, 20°59’42”E) on 29 June, 2016 (photo 4). Altogether, 19 paired and 76 single empty valves were colle...
OBSERWACJE MEWY BLADEJ LARUS HYPERBOREUS W PÓŁNOCNO-WSCHODNIEJ POLSCE
On 13 March 1994 near Mrągowo, and on 22-28 March in Białystok, we noted Glaucous Gulls Larus hyperboreus in their second calendar year, and on 6 January 2015 in Ełk, an adult bird of the same species. These records corr...
Nowe pozazimowe stwierdzenie nocka łydkowłosego Myotis dasycneme w Sudetach
A new non-winter record of the pond bat Myotis dasycneme in the Sudety Mountains was reported from „Obóz Bukówka” ornithological camp located near Bukówka dam reservoir (Brama Lubawska region). One individual was capture...
DUŻA LICZBA MARTWYCH ZASKROŃCÓW ZWYCZAJNYCH NATRIX NATRIX NA LOKALNEJ DRODZE
On 3 October 2015, on the local, asphalt road Borek – Pagowiec (51°35’40’’N, 21°0’47’’E, Central Poland), 74 dead grass snakes Natrix natrix (0.8 ind./10 m) were found, and two alive on the road side. The inventory was c...
PIERWSZY PRZYPADEK LĘGU WÓJCIKA PHYLLOSCOPUS TROCHILOIDES NA NIZINIE MAZOWIECKIEJ
On 2 July 2014, I observed 2 individuals of the Greenish Warbler Phylloscopus trochiloides in the backyard garden located in Raszyn (52,156659 N, 20,925384 E). The adult was feeding one individual begging for food. This...