The Research On Bird Community In Farmland And Hilly Terrain In Guangxi

There are many species of birds with a wide range of distribution,which are especially sensitive to the changes of the environment.Farmland and hilly region is the most active area of human activities,but also the habitat of birds.The main habitat in farmland and hilly region is the secondary thicket,the grassy slope and the cultivated land interlaced and intermingled.Animals have frequent round-trip and seasonal migration between habitats.The ecology is affected by human economic activities with obvious seasonal changes.The study of birds in farmland and hilly region is conducive to understanding the habitat quality and the intensity of human economic activity in this area.From 2015 to 2018,a survey of the bird resources in farmland and hilly region of Guangxi had been conducted by a method that combined sample line and sample point to analyze the changes of bird communities in different habitats,diversity differences and stress factors,and propose corresponding solutions for stress factors.The main results are as follows:1.199 species of birds were recorded in farmland and hilly region in Guangxi,which belonged to 15 orders,49 families,127 genera,totaling 44898 birds.Among of them,the largest number of species was resident birds(114 species),there were 27 species of summer migratory birds,44 species of winter migratory birds and 14 species of traveling birds.Passerine birds were the most abundant,with 129 species of 27 families.Non-passerine birds had 22 families and 70 species.There were 112 species of birds distributed in central China,51 species in three areas of Central China,south China and southwest China,20 species in two areas of Central China and South China,6 species in two areas of South China and southwest China,9 species in one area of South China and 1species in one area of Central China.The floristic characteristics of animal species were consistent with the geographical location of Guangxi farmland hilly region.The species distribution types were mainly Oriental(101 species),South China(22 species)and Paleo-North(22 species),which were not easily classified into 18 species.There were 18 species recorded to focus on the protection of national ? level.2.Species richness of each order was significantly correlated with the total species richness in the farmland and hilly region of Guangxi,and there was also significant correlation among groups of each order,but covariation trend was also different among groups.In the correlation analysis,passerines showed a high correlation with the total species richness,indicating that passerines had a significant influence on the pattern of bird species richness in the farmland and hilly region.3.The bird communities in farmland and hilly region in Guangxi were different in different habitats.According to the kruskal-wallis test of the independent samples in the non-parametric test method,the number of birds in different habitats in farmland and hilly region in Guangxi was significantly different(H=12.167,P<0.05),and the diversity index,evenness index and dominance index were significantly different(H=22.419,P<0.01)?(H=22.149,P<0.01)?(H=22.149,P<0.01).Among them,the differences in community indexes between the two habitats were the most obvious.4.There were 56 species of migratory birds,which belonged to 39 genera,23 families,10 orders respectively,and passerines were the most,37 species in total,accounting for 66.1% of the total order.Passerines had a great advantage in migratory birds in North Guangxi.It was of great significance to study the migratory birds in the farmland and hilly region of North Guangxi for global climate monitoring.5.Environmental pollution,illegal hunting and habitat loss are some of the factors affecting bird population decline.According to the factors affecting the decrease of bird population,the corresponding solutions are as follows: protecting the environment,green development;Strengthen protection and publicize relevant documents;Afforestation.6.Protecting the habitat of farmland hilly region is of great importance for the protection of birds in the area.