Home – Home – Jornals – Contemporary Problems of Ecology 2024 number 1

Ecologo-geographical differentiation and dynamics of spring migration of water and semiaquatic birds of the Putorana Plateau are analyzed. In 1988-2007 on an area of 250000 kmІ, 8 points were surveyed in the northern, southern, western and eastern parts of the region. The method of route accounting was used. The water and semiaquatic avifauna of the Putorana Plateau in the spring migration period includes 68 species. The most significant in its formation are tundra species (53 %) from among the Anseriformes and Charadriiformes, totaling 94 %. Birds fly in north, east and west directions. They make stops at the early areas of river deltas that are freed from snow and ice. There are species that are distributed in stopping places everywhere (38 %), locally (22 %), pointwise (40 %). Bird population density at stops 15-227, on average ( n = 8) 94 ind./1 km of coastline. The population of birds on lakes is always much poorer than on adjacent river sections. The vast majority of individuals of almost all migratory species are united in monospecific, rarely polyspecific flocks. The entire spring migration of water and semiaquatic birds on the Putorana Plateau takes place from May 19 to June 27 and lasts an average ( n = 10) 23 days. The main passage runs from May 25 to June 17 and lasts an average of ( n = 8) 7 days. Spring migration is most intense in the west of the Putorana, where at least 20000-30000 individuals of woter and semiaquatic birds fly through the surveyed points. The span is much weaker in the center and, especially, in the east of the region. There are 19 species among the dominants of water and semiaquatic habitats, incl. Eurasian Wigeon, Common Teal, Grey-taild Tattler, Northern Pintail, Little Stint.