Investigation and Evaluation of Biodiversity Status in Typical Regions of Northwest Hunan Province
[Objective]Fully grasp the resource background of terrestrial vertebrates and vascular plants in Anxiang county,update animal and plant resource information,and establish and improve the biodiversity database in Anxiang county.[Method]Based on the investigation of the current status of biodiversity in Hunan province,a comprehensive evaluation method of biodiversity was adopted using the weighted sum of six evaluation indicators:wild animal richness,wild vascular plant richness,ecosystem type diversity,species endemism,threatened species richness,and invasive alien species.Taking Anxiang county as an example,a survey and evaluation of the current status of biodiversity in a typical area of northwest Hunan was conducted.[Result]There were 267 species of terrestrial vertebrates in Anxiang county,belonging to 26 orders,84 families,and 167 genera.Among them,there were 8 species of amphibians in 1 order,6 families,and 7 genera,25 species of reptiles in 2 orders,10 families,and 18 genera.There were 214 species of birds in 17 orders,55 families,and 124 genera,and 20 species of mammals in 6 orders,10 families,and 14 genera.948 species of vascular plants,belonging to 149 families and 523 genera,including 21 species in 13 genera of 10 families of ferns(wild group),21 species in 13 genera of 6 families of gymnosperms(including 7 species in 5 genera of 4 families of wild gymnosperms),906 species in 497 genera of 133 families of angiosperms(among them,there were 756 species of wild angiosperms belonging to 429 genera in 125 families).There were a total of 28 invasive species of vascular plants.The comprehensive evaluation of biodiversity was 22.302 6 in Anxiang county,which belongs to the general level.The diversity index(H)of important species in vascular plants was 1.198 5,the evenness index(J)was 0.545 5,and the dominance index(D')was 0.542 0.The diversity index(H)of important animal species was 0.852 1,the evenness index(J)was 0.342 9,and the dominance index(D')was 0.332 2.[Conclusion]Compared with Shimen county in Hunan province,Anxiang county has fewer species,fewer endemic genera and species,and relatively rich biodiversity in some areas,but the overall level of biodiversity was average.The evaluation results obtained by using this evaluation index system can objectively reflect the biodiversity status of the county and have good application prospects.
biodiversitynorthwest Hunancurrent situation investigationevaluation indicator system
万方数据
维普
