Програма на научната конференция - Министерство на ...

Нашите резултати показват, че трябва да се насърчава поддържането наструктурната сложност на местообитанията чрез екстензивното им ползване,както и осигуряването на храстова растителност и зониране на земеделскитепрактики. В заключение, за ефективното опазването на ортинофауната вНатура 2000 мрежата е необходима по-голяма гъвкавост на ОбщатаСелскостопанска Политика.EFFECTS OF HABITAT STRUCTURE AND MANAGEMENT ON BIRDCOMMUNITIES IN HIGH NATURE VALUE GRASSLANDS OFBULGARIAS.C. Nikolov 1,2 , D.A. Demerdzhiev 2 , G.S. Popgeorgiev 2 , D.G. Plachiyski 21Central Laboratory of General Ecology, Bulgarian Academy of Sciences;2 Gagarin Street, 1113 Sofia, Bulgaria, E-mail: ecolab@ecolab.bas.bg; 2Bulgarian Society for the Protection of Birds – BirdLife Bulgaria,27A P. Todorov Street, 4000 Plovdiv, Bulgaria, E-mail: plovdiv@bspb.orgOver the past half century, grassland birds in Europe have declined dramaticallyand for the aim to maintain and restore their populations it is critical to understandhow habitat structures and quality within semi-natural grasslands affect birds. Sofar there is no data about these effects in Bulgaria. We investigated how habitatstructure and land management influence on bird communities in upland andlowland high-nature value grasslands in two Natura 2000 sites (Ponor andBessaparski Hills) in Bulgaria. Birds were sampled using the point-count method.A total of 223 circular plots were monitored during the breeding seasons of 2008and 2009 and more then 3000 observations of birds from about 60 species wererecorded. The results show that habitat complexity, management and landscapeposition do influence bird community structure and species occurrence within thestudied grasslands. Extensive management and habitat heterogeneity support highbird-species richness and diversity and therefore these factors are beneficial foravian conservation. Our results suggest that extensive land management should bepromoted, ensuring availability of shrubby vegetation and zoning of agriculturalpractices wherever it is possible. We conclude that effective avian conservationwithin Natura 2000 network should be supported by a higher flexibility of theCommon Agricultural Policy.34