Study On Habitat Selection And Habitat Fragmentation Of White-Necklaced Partridge(Arborophila Gingica)

White-necklaced Partridge is an endemism species in China and there are a few studies on its habitat.From March 2017 to January 2018,we investigated habitat selection in Dayaoshan Nature Reserve and Jiuwanshan Nature Reserve and analyzed the habitat fragmentation of White-necklaced Partridge in Guangxi,the results are divided into the following two parts:1.In study of the habitat selection of White-necklaced Partridge.we selected 19 factors to analyzed the variables between different periods and different regions.The results were as follows:(1)During the breeding period,White-necklaced Partridge randomly use broadleaved forest and broadleaved-bai bamboo(Indosasa shibataeoides)forest,while they rarely occurred in China fir(Cunninghamia lanceolata)forest and Bajiao(Illicium verum)forest.White-necklaced Partridge's feeding place in breeding period has main features:the place close to the forest road,far from the forest edge;has high herbage coverage,large thickness of fallen leaves,middle-up slope position.The main factors directly affecting the differences of using and control sites of White-necklaced Partridge in breeding period are slope positions(Wilks' ? =-0.320),distance to road(Wilks' ? =-0.328),cover of grasses(Wilks' ?=0.400)and thickness of shatter(Wilks' ?=0.906).(2)During the Non-breeding period,White-necklaced Partridge randomly use broadleaved forest,broadleaved-bai bamboo(Indosasa shibataeoides)forest and bai bamboo dorest,while they rarely occurred in China fir(Cunninghamia lanceolata)forest and Bajiao(Illicium verum)forest.White-necklaced Partridge's feeding place in Non-breeding period has main features:the place close to the forest road,far from the forest edge;has arbor with low coverage and small density,bai bamboo and shrub with high coverage,herbage with low coverage,thick fallen leaves with large coverage.The main factors directly affecting the differences of using and control sites of White-necklaced Partridge in Non-breeding period are distance to road(Wilks' ?=-0.764)and thickness of shatter(Wilks' ?=1.133).(3)In different period,White-necklaced Partridge's habitat selection has significant differences in some parameter.The altitude of White-necklaced Partridge in breeding period is much higher than Non-breeding period,reflecting the phenomenon of vertical migration.In breeding period,the birds biased toward the selection of herbage with high coverage and large density habitat which could provide more food resources for chicks.During the Non-breeding period,the birds preference selected habitats with thick fallen leaves,which was related to the change in the diet.In different periods,White-necklaced Partridge tend to choose habitats that are farther from the forest edge and close to the forest road.These habitat variables are the choice of White-necklaced Partridge in measured food factors,risk of predation and human interference.(4)In different regions,White-necklaced Partridge's habitat selection between Dayaoshan and Jiuwans showed that there were significant differences in tree's density and average height,bai bamboo and shrub's density,average height and coverage,which represent the vegetation conditions.The habitat of White-necklaced Partridge in the two regions is similar.2.In the study on the habitat fragmentation of White-necklaced Partridge in Guangxi region,we used Arcgis technology and GARP model to create its habitat distribution layer.We analyzed the three patches of Dayaoshan,Jiuwanshan and Damingshan which has White-necklaced Partridge distribution in Guangxi,and measuring the area of study region,the area of habitat,the area of human disturbance and diatance between each patch,calculated the fragmentation index of three patch.The main results are as following:(1)The total habitat area of three study regions is 517.69 km2,752.45 km2 and 135.25 km2 respectively.(2)The human disturbance index(HDI)of three study regions is 0.6146,0.1671 and 0.4255 respectively.(3)The fragmentation index(F)of three study regions is 0.9779,0.9641 and 0.7636 respectively.The results show that human activities are the main factors for the habitat fragmentation of White-necklaced Partridge in Guangxi.Among that,the habitat fragmentation of Dayaoshan is more serious,and the human disturbance and the degree of habitat fragamentation of Damingshan and Jiuwanshan is smaller.This paper analyzed the existing threats of White-necklaced Partridge,and proposed some protective suggestion.