湖南省鼎城区生物多样性评价

Evaluation of Biodiversity in Dingcheng District of Hunan Province

【目的】本文对鼎城区生物多样性状况的量化评价,为县域生物多样性保护提供重要的基础数据和参考依据。【方法】本文采用生物多样性综合评价法,用生态系统类型丰富度、中国特有物种丰富度及国家重点保护物种丰富度代替生态系统类型多样性、物种特有性以及受威胁物种的丰富度,最终选取野生动物丰富度、野生维管束植物丰富度、生态系统类型丰富度、中国特有物种丰富度、外来物种入侵度、国家重点保护物种丰富度6项评价指标体系,建立鼎城区生物多样性评价指标体系。【结果】鼎城区境内现有野生脊椎动物323种,野生维管束植物1174种,生态系统类型40种,中国特有植物84种,中国特有动物25种,国家重点保护植物24种,国家重点保护动物40种,外来入侵植物17种,外来入侵动物12种。鼎城区生物多样性指数(BI)为39.954。【结论】鼎城区生物多样性状况为一般,即区域内物种较少,特有属、种不多,局部地区生物多样性较丰富。根据指标得分情况来看,国家重点保护物种丰富度和外来物种入侵度得分值较高,中国特有种丰富度得分值最低,即区域内国家重点保护物种较多、外来入侵物种和中国特有物种分布均较少。

【Objective】The biodiversity status of Dingcheng District was quantitatively evaluated so as to provide important basic data and reference for county biodiversity protection.【Method】In this paper,the comprehensive evaluation method of biodiversity was used to replace the richness of ecosystem types,species specificity and threatened species with the richness of ecosystem types,Chinese endemic species and national key protected species.Finally,the six evaluation indexes of wildlife richness,wild vascular plant richness,ecosystem type richness,Chinese endemic species richness,alien species in vasion and national key protected species richness were selected to establish the biodiversity evaluation index system of Dingcheng District.【Result】In Dingcheng District there were 323 species of wild vertebrates,1174 species of vascular plants,40 species of ecosystem types,84 species of endemic plants and 25 species of endemic animals in China,24 species of national key protected plants,40 species of national key protected animals,17 species of alien invasive plants and 12 species of alien invasive animals.The biodiversity index(BI)was 39.954.【Conclusion】The status of biodiversity in Dingcheng District was general.In the region there was few species,few endemic genera and species,and local biodiversity was rich.According to the index score,the richness of national key protected species and the invasion of alien species were higher,and the richness of endemic species in China was the lowest,namely,there were more national key protected species in the region,and the distribution of alien invasive species and Chinese endemic species were less.