Kazulìn, Alâksandr Vasìl'evìč ; Vergeičik, Lûbov' Aleksandrovna ; Stepanovič, Ìosìf Mìhajlavìč (1955– ) ; Polska Akademia Nauk. Muzeum i Instytut Zoologii
Acta Ornithologica, vol. 39, no. 1 ; Czynniki wpływające na zmiany liczebności wodniczki ; Fluctuations of aquatic warbler population
Museum and Institute of Zoology, Polish Academy of Sciences
Bibliogr. s. 43 ; S. [35]-44 : il. ; 27 cm ; Streszcz. pol. Nazwy taksonów także w jęz. łac.
Data on the density of Aquatic Warbler and plant associations in the marshes of the Sporovskiy reserve (Byelarus) were collected between 1996 and 2003. The species density changed yearly from 135 to 0 males per km2. The density and numbers of these birds are governed mainly by changes in the groundwater table caused by floods, droughts or fires. Aquatic Warblers breed successfully when the groundwater table coincides with the topsoil level; the optimal water table lies in the range from 12 cm above the soil to 5 cm below it. Between 1981 and 2002 successful first-clutch breeding occurred 11 times (47.8%); in only 4 years was second-clutch breeding successful (17.3%). First and second clutches both failed in 9 years (39%). The pattern of changes in the population size and data on the recovery of the population size following such unfavourable years indicates that the key factors governing the overall population size are not migration or wintering conditions, but rather the state of the breeding biotopes. Active management of fenland still in its natural state is therefore of paramount importance.
oai:rcin.org.pl:54207 ; kliknij tutaj, żeby przejść
MiIZ PAN, sygn. patrz sygn. czas. P.257-39-1 ; MiIZ PAN, sygn. patrz sygn. czas. P.4568-39-1 ; kliknij tutaj, żeby przejść
Prawa zastrzeżone - dostęp nieograniczony
Muzeum i Instytut Zoologii Polskiej Akademii Nauk
Biblioteka Muzeum i Instytutu Zoologii PAN
2 paź 2020
10 cze 2015
64
https://rcin.org.pl/miiz/publication/74042
Kazulìn, Alâksandr Vasìl'evìč
Kazulìn, Alâksandr Vasìl'evìč
Kazulìn, Alâksandr Vasìl'evìč Pavluschick, Tatiana
Iwan, Dariusz Polska Akademia Nauk. Muzeum i Instytut Zoologii
Warchałowski Andrzej Polska Akademia Nauk. Muzeum i Instytut Zoologii
Burakowski, Bolesław Polska Akademia Nauk. Muzeum i Instytut Zoologii
Tomaszewska, K. Wioletta Polska Akademia Nauk. Muzeum i Instytut Zoologii
Hetmański, Tomasz Polska Akademia Nauk. Muzeum i Instytut Zoologii