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Issue:ISSN 1000-7083
          CN 51-1193/Q
Director:Sichuan Association for Science and Technology
Sponsored by:Sichuan Society of Zoologists; Chengdu Giant Panda Breeding Research Foundation; Sichuan Association of Wildlife Conservation; Sichuan University
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Survey Method on the Impact Distance of Town to Alpine Grassland Birds
Author of the article:Zhao Zhouzhou、Dai Qiang、Deng Huaiqing、Zhou Jiang
Author's Workplace:1.College of Life Science, Guizhou Normal University 2.Chengdu Institute of Biology,Chinese Academy of Sciences
Key Words:Alpine grassland;Urbanization;Birds;Survey method
Abstract:Abstract: A large area of land has been occupied during the process of urbanization, which has a tremendous impact on bird. The method to estimate the distance of urban and town impacting on birds, whereas, still lack. This paper investigated the method to estimate the distance, with the birds in a Zoige alpine grassland, a simple and monotonous habitat. We set 6 transections in grassland beside Tangke town, Zioge. The species richness, counts and biomass of birds at different distances from towns were analyzed. Correlation analysis showed that the counts of Milvus migrans, Hirundo rustica and Passer montanus were negatively correlated with the distance from the town. It implied that those species show preferences to habitat near town. The distributions of Pseudopodoces humilis, Eremophila alpestris and Montifringilla taczanowskii significantly positive correlated with the distance from the town. Those species showed preferences to grassland habitat away from town. Whereas, other species show no significant preference between habitats near and far away from town. Piecewise regression analysis revealed the patterns of the counts, biomass and richness of birds changing along the distance from town, which characterized by decreasing first and then rising slowly. The results showed that, the counts and biomass of bird bottomed between 339-630 m away from town, while the richness bottomed between 339-630 m. The environmental factors changed from town to grassland habitat along those transections. Possibly, the distribution patterns of birds formed due to that the habitat in the bottom regions is too far from town for those birds prefer town while is too close for those grassland birds.
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