The Study Of Bird Community Structure And Species Diversity In Yongdeng County

Yongdeng County in Mongolian-Xinjiang Plateau,the Loess Plateau and the Qinghai Tibet plateau junction,is located in the niddle part of Gansu Province,which is the Qilian mountain glaciers and water conservation ecological function zones and the important ecological barrier for Hexi oasis hasing pivotal position.Special ecosystems and climate bred a variety of biological resources.The study on the biological aspects of Yongdeng County is rare.According to the information,before the founding,it has not a systematic investigation of species resources in Yongdeng county.Study on bird diversity in Yongdeng county is blank,except a scientific investigation the Liancheng National Nature reserve.Over the past decade,no further reports of bird community and diversity.In order to understand the situation of bird diversity and community structure in Yongdeng County further more,I conduct detail investigation and analysis Lanzhou New Area wetland of Yongdeng County waterfowl status separately in Protection Priority A rea biodiversity surveys of the Ministry of Environmental during May to December in 2015.The main results are as follows:1.122 kinds of birds are founded in Yongdeng County survey,belonging to 70 generas,34 families and is orders.According to the residence type,the Yongdeng County has 68 kinds of resident birds,45 kinds of summer visitors species,5 kinds of winter visitors species and 5 kinds of migrants species species.According to the regional fauna,it has 61 kinds of Palaearctic realm species,56 kinds of Eurytopic species,5 kinds of Oriental realm species,therefore,Palaearctic realm species is dominant in Yongdeng County.The mostly distribution pattern of birds is the northern type in the whole area.From the viewpoint of ecological types,the largest number of songbirds,other population distribution less and the number of little difference.2.In Yongdeng County,there are three kinds of birds,that belong to First Category of State key protected Wildlife List,6 species of birds,that belong to Second Category of State key protected Wildlife List.Seven species belong to Chinese endemic birds.There are eight kinds of species is listed in IUCN,one species were enrolled in the list of CITES appendix Ⅰ,five species of birds in appendix Ⅱ.3.According to the habitat type,the birds in Yongdeng county were divided into the Farmland-village community,the Bush and grassland community,the Forest community,the Wetland community.Using the Shannon-Weiner index,Pielou index and Simpson index,analysised bird diversity,evenness and dominance of four communities.The results showed that the index of diversity and dominance the Bush and grassland community was hight,the evenness index of forest community was highest.4.Index of G-F from high to low is:the Bush and grassland community>the Forest community>the Wetland community>the Farmland-village community.The highest similarity of bird communities between the Bush and grassland community and the Farmland-Village community.5.The Lanzhou New Area of Yongdeng County has waterfowl 17 species,belonging to 13 generas,8 families and 6 orders.The Palaearctic realm species and Eurytopic specios has seven species.Only one kinds of Oriental realm species.Twelve kinds of summer visitors species,three kinds of winter visitors species and two kinds of migrants species.And diversity,evenness and dominance are both bigger in summer than in winter.6.Based on this investigation,the major ecological problem of Yongdeng county is human disturbance,drought,poor natural conditions,low of the forest coverage rate in spite of big area.Accordingly put forward some protection management suggestions to Yongdeng County.