Modern State of Barnacle Goose Population Expansion in the Central Part of Kolguev Island

Переведенное название: Современный статус экспансии популяции белощекой казарки в центральной части острова Колгуев

Александр Кондратьев, Петр Глазов, Юлия Лошагина, Эльмира Мидхатовна Зайнагутдинова

Результат исследований: Материалы конференцийтезисы

Аннотация

The population growth of Barnacle goose on Kolguev island has started since the very beginning after this species has occupied the island, where it was never recorded breeding until late 1980-ies. On the very first stage the colonies were established in the coastal area on sand dunes and in coastal marshes. Until the middle of 2000-ies only the colony size growth was observed and in 2006 the biggest colony in the Peschanka river delta counted more than 45000 breeding pairs, being the largest known Barnacle Goose colony in the world at that moment. The next steps of Barnacle Goose population expansion included two major events – intensive movements of broods and moulting groups from Peschanka river delta into the central part of Kolguev, and establishment of many new small colonies under protection of Peregrine falcons. These steps correspondingly included shift of the great part of the population from the usual coastal salt marshes as brood-rearing habitats to the banks of freshwater lakes, rivers and creeks, where the growing groups of Barnacle geese started to overlap in spatial distribution and habitat preferences with White-fronted and Bean Geese.
Another step was noticed since the early 2010-ies, when first colonies appeared in boggy habitats at the bottom of dried-out lakes in the Upper Peschanka river area in the very centre of Kolguev.
Here we present the modern state of the Barnacle Goose expansion, which includes the appearance and continuous rapid increase in the number of single nests and small colonies all over the watershed plain landscapes along with the continuous growth of big colonies along bluffs of Peschanka and other major rivers of the central part of Kolguev. Brood-rearing and moulting groups of this species now predominate in all kinds of habitats, being presented by both single-species flocks and multi-species aggregations.
Язык оригиналаанглийский
СостояниеОпубликовано - фев 2020

Предметные области Scopus

  • Науки об окружающей среде (все)
  • Земледелие и биологические науки (все)

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