Studies On Birds Community In Nanning

We did researched on birds in Nanning from December of 2009 to February of 2011. The followed five aspects were studies during this time:Bird constitue in Nanning city during summer and winter. Similarity analysis between Bird community structure and habitats. Research of bird foraging guilds of Nanning. Similarity analysis among different landscapes in suburban. Bird diversity at the North farmland in winter.1.189 species belongs to 47 families and 17 orders was detected in the study area. Among them,106 species were resident birds, about 56.1% of total birds.55 species were winter migrants,29.1% of total birds.25 species were summer migrants,13.2% of total birds,3 species were straggler bird,1.6% of total birds. Resident bird is the principal part of the city bird community.2. Water, bushwood, coniferous forest and broad-leaved forest are the major habitat types in Nanning city Greenland. The diversity of broad-leaved forest both in summer and winter is the highest, and the bushwood is follow it. By the reasons of water birds immigration with seasonal, so the water habitat has a dominance in the highest. The broad-leaved forest is the lowest. So the bird community of broad-leaved forest is the steadiest one. The water habitat is the instability one. Species turnover(βw) is minimum in bushwood., maximum in water for the reason is a lot of water bird immigration. Birds community in winter is more steady then in summer.3. Divided to several microhabitats, do a relativity analysis between microhabitats and bird community structure. Results show that the bird diversity, homogeneity and species are positive with Forest area percentage and diversity of habitat types, are negative correlation with distance between lines and habitats, human quantity and Grass area percentage. Species and diversity are negative correlation with water area percentage.4. Divided into 13 guilds from bird community of summer and winter by cluster analysis. The results show that the foraging guild has been change by season. Abundance of food resource is the main reason for change. The bird species distribute was influenced by food resource and foliage diversity. The bird focus at the upper canopy and the ground. There were few guilds has been divided by the foraging height. The bird can change the foraging behaviour in someway.5. The suburban around the city has 6 main types landscapes. The nature landscape is the most important one to urban birds community. Because the vegetation is so different between urban landscape and farm landscape, so the consistency of species between them can't get higher. They would be two types of ecosystems by opposite.