| Liangucheng National Nature Reserve(Here in after referred to as the Liangucheng Reserves)is located in the county of Minqin,GanSu province.The county of Minqin is surround by the Liangucheng Reserves.It It acts as the natural barrier between the oasis and the desert,to protect its oasis is not the desert erosion.It is the Hexi Corridor northeast wind sand line on a major line of defense.As an important ecological component of the Hexi region,where is a special ecosystem and climate environment produced a significant portion of the suitable for the xerophytes and wetland bird resources.But less research on its bird diversity.Tang xiaoping conducted a scientific research about the reserve in 2000~2001.In order to know more about the diversity of birds in Liangucheng reserves,I made investigation and research in detail about birds resources and bird community structure in four different habitats and in four seasons from 2016 to 2017 during the wildlife diversity survey in the county of Minqin.The main results are as follows:1.84 species of birds are founded in the survey,belonging to 54 generas,32 families and17 orders.According to the residence type,the reserves has 38 species of resident birds,32 species of summer visitors species,11 species of winter visitors species,3 species of migrants species species.According to fauna,the Eurytopic species who occupies an leading position in the reserves,a total of 62 species.21 species of Palaearctic realm species,1 species of Oriental realm specie in the reserves.The whole area of bird distribution is mainly the northern type.2.In the Reserve,there are four species of birds,that belong to First Category of State key protected Wildlife List,eight kinds of birds,that belong to Second Category of State key protected Wildlife List.There are nine kinds of species is listed in IUCN.One species belong to Chinese endemic bird.Two kinds were enrolled in the list of CITES appendix I,nine species of birds in appendix?.3.According to the natural geographical environment,vegetation type and distribution of birds in Liangucheng National Nature Reserve,it is divided into 4 communities.The species diversity,evenness and dominance of four communities were analyzed by diversity index.The results showed that: Index of community diversity and evenness of Wetland bird communities is the highest,index of dominance of Sparse shrub bird communities is the highest.4.G-F index was used in analysis of family or class of birds.Index of G-F from high to low is: the Wetland community >the Desert steppe community > the Farmland-village community >the Forest and bush community.Smith similarity value is used to analysis the structure of the birds in four different habitats.At the same time,SPSS20.0 software was used to cluster analysis.The results show that similarity between Forest&bush bird communities and Desert steppe bird communities is the highest.There were significant differences in species diversity between the Wetland community and other three communities.5.Bird community characteristics were analyzed in Spring,Summer,Autumn,and Winter,we found that,index of community diversity and dominance of summer bird communities is the highest,and index of evenness of spring bird communities is the highest.6.The G-F index analysis of four seasons shows that,index of F,G and G-F of bird community,in summer were all the highest.The G-F index of the winter bird community is the lowest,which is different from that of the other three seasons.7.Based on this survey analysis,the problem that affects the survival of birds is grassland degradation,rampant rodents,land desertification intensified and wetland area decreases.The main problems Liangucheng Reserves refacing is population growth,overgrazing,serious shortage of water resources and weak awareness of the masses' s environmental protection and so on.Based on this,The protection of some targeted suggestions and countermeasures were put forward. |
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