Орнитокомплексы Тростниковых Зарослей: Структура, Динамика, Проблемы Охраны

• Main Author: Кошелев, В.А.
• Format: Text
• Language: Ukrainian
• Published: Zenodo 2017
• Subjects: ornithocomplex; structure of ornithocomplex; consortia; consortive connections; reeds; Circus cyaneus; Falco peregrinus
• Online Access: https://dx.doi.org/10.5281/zenodo.1107831; https://zenodo.org/record/1107831

The studies were conducted in 1996-2016 yy. in various types of water reservoirs in the southern, regions of Ukraine. The features of the formation, structure and dynamics of bird communities of, reeds, birds consorted connections with reeds Phragmites australis (Cav.) Trin. ex Steud. Are studied. Reeds are dominant among the hard surface vegetation on all the freshwater ponds in the region. The reeds consortium is formed quickly. The center of edificatory species is cane, which is formed around 4-5 concenters levels allocated, depending on the extent of other species, from the central nucleus of the form and its associated range of environmental constraints: trophic, topical, fabric, phoretic, exogenous and endogenous. Consorted connections of cane with birds are of the highest intensity in the summer. In autumn, winter and early spring reeds without leaves are sparse and less attractive to birds. The most noticeable and significant are topical connections (in the breeding season – 42 species of birds, during the spring migration – 18, during the autumn migration – 28, in winter – 22 species). Trophic, fabric and foretic connections are less pronounced. The obligate consorts (level 1) include12 species of birds, the optional ones (2nd level) – 30 species. The third concenter involves specialized species of birds of prey ( Circus aeruginosus Linnaeus, 1758; Circus pygargus , Linnaeus, 1758; Circus cyaneus Linnaeus, 1766; Falco peregrinus Tunstall, 1771; Buteo lagopus Pontoppidan, 1763; Accipiter nisus Linnaeus, 1758; Falco subbuteo Linnaeus, 1758; Asio flammeus Pontoppidan, 1763) that prey on large and small birds, rodents, large insects. Dense reeds are readily used for shelter from predators and to form mass night-stays for many birds (50 species). In summer, the flooded reedbeds were registered to have 82 species of birds, whereas the dry ones had only 4 species. In winter, reeds were noted to house 22 species of birds (topical and fabric connections, to a lesser extent - trophic). Fully formed ornithocomplexes were characterized by stability of topical and trophic relations, participation in new types of relationships among bio-geo-cenoses attracting birds and animals of the neighboring ecotones and ecosystems, but their participation is negligible. Seasonal dynamics of the species structure, the ratio of forward and backward linkages were pronounced. Birds are also actively involved in mero-consortiums of cane, extracting invertebrates from the generative organs and stems. Consortia of birds and constant updating of the annual natural cane, optimal hydro-regime of the reservoir provided the resistance; the biocenoses are constantly threatened by continuous mowing, burning in springtime, over-grazing in coastal areas, as well as by water drainage, and water pollution with heavy metals, toxic chemicals and pesticides.