Dubinina Y. Ecological properties of the Caspian gull (Larus cachinnans Pallas, 1811) in North-West Priazovie landscapes.

Object - cenopopulations of Caspian gull (Larus cachinnans Pallas, 1811) in the North-West Priazovie. The aim is to explore the ecological features of Caspian gull in natural and anthropogenically transformed landscapes of North-West Priazovie. The methods are field observations; stationary monitoring studies; MDM-procedure (multinomial diversity model), Nonmetric multidimensional scaling. On the basis of long-term researches of a Caspian gull (Larus cachinnans Pallas, 1811) in landscapes of Northwest Priazovye features of time dynamics of populations Larus cachinnans have been found. The quasicyclic dynamics strategy of metapopulation systems have been shown. The degree of a coordination of terms of the beginning of reproduction with strategy of dynamics of a Caspian gull has been established. Laws of placing of colonies of a Caspian gull and design features of its nests, laws of formation of dimensional characteristics nests of the Caspian gull have been established. Reproductive features of populations Larus cachinnans have been revealed. Laws of survival rate of baby birds Larus cachinnans have been defined. The role of agricultural grounds and dumps of a household waste as trophic station Caspian gull have been estimated. The role of a Caspian gull in formation of indicators diversity of communities of birds have been defined. It is shown, that anthropogenous transformation of a hydrological mode of water basins leads to infringement habitats reproduction of many species of birds in region, including rare. The Caspian gull as more ecologically a plastic species serves as the reason of additional pressure upon more sensitive populations of rare species of birds. Therefore decrease in anthropogenous pressure upon water objects is the important tool of restoration of mechanisms of ecological equilibrium and the factor of decrease in negative influence of a Caspian gull in the conditions of anthropogenous pressure. A question of dumps of a household waste the Caspian gull in comparison with other species region is the factor of increase in competitive advantages Caspian gull. Taking into account sanitary risks, the decision of a problem of a household waste, especially within resort region which Northern Priazovye, is necessary for regulation of number of a Caspian gull. Application spheres are monitoring of bird island, the regulation of number of birds, training courses.