DIVERSITY OF BIRD POPULATIONS IN ECOSYSTEMS OF AGRICULTURAL CROPS IN THE SUBURBAN AREA OF TIMISOARA CITY, IN HIEMAL SEASON PUBLISHEDCornelia (GRECU) VĂDUVA, Andreea FÂC, Florian BORLEA
Agroecosystems of periurban areas in Timisoara city are represented by agricultural crops (in the north is USAMVB Timisoara resort, adjacent thoroughfares to Calea Aradului si Calea Torontalului and in the south Calea Sagului area), pastures (Freidorf area in the western side and in the south eastern the areaof Calea Buziasului – Calea Mosnitei , aiming at a mixed grassland ecosystem, agricultural crops and residential areas). This paper aims to show a picture of the avifauna from ecosystems of agricultural crops, heavily modified by humans, share the adaptability of species of birds in such habitats. These lists may contribute to the composition of similar databases as the Common Bird Monitoring Program of the Romanian Ornithological Society, very important data for nature conservation throughout the country and at international level; through this kind of research is attempted the composition of data bases on the conservation status of bird populations and to find strategies to limit negative effects on society due to their development.The investigation method applied is based on the path method (Ferry and Frochot, 1958), improved through a statistical method processed by specialists from the Zoology Department of the Faculty of Chemistry, Biology and Geography of the Western University from Timisoara. The method emphasizes both aspects of abundance and species coverage of energy and the importance of species in ecosystem. From observations, that are present between 12 and 24 species of birds, with few exceptions, the typical season, this type of ecosystems and their peculiarities. The degree of dominance varies from one ecosystem to another, depending on the vegetation, especially woody vegetation, the vicinity of transport routes, with wooded areas or residential areas. Most adapted proved to be the antropofile and ubicviste species.The rapace are described in various specialized works as generally useful agricultural species through biological control that is unintentionally practiced by the act of feeding, such as owl (Athene noctua) (Catuneanu, 1952), which in a month consumes 300 mice , Asio flammeus and Buteo buteo or Corvus frugilegus , which contributes more to combat beetle by feeding with its larvae that are unearthed during plowing.
agroecosystem, birds, dominance, Timisoara