河南省伊洛河流域生物多样性调查及评价

选取物种丰富度、生态系统类型多样性、物种特有性、受威胁物种丰富度、外来物种入侵度5个评价指标,以县域为评价单元,对河南省伊洛河流域13个县区展开生物多样性调查并进行综合评价,旨在系统掌握伊洛河流域生物多样性现状,为管理部门制定有效保护策略提供决策依据,并且进一步检验环保部已建立的生物多样性评价指标和方法.结果表明:流域内共有野生维管植物2882种;各类脊椎动物514种;自然分布的生态系统类型114种;中国特有物种1 107种;受威胁物种252种;外来入侵植物53种.上游卢氏、嵩县和栾川生物多样性评价结果为"高",中游的洛宁、宜阳、伊川为"中",而下游7个县区生物多样性均为"一般".流域内生物多样性地域性差异较大.

Biodiversity Investigation and Assessment of Yihe-Luohe River Basin in Henan Province

By taking county area as the basic assessment unit,five assessment indicators which are composed of species richness,diversity of ecosystem types,endemism,threatened species richness and extent of alien species invasion are employed to evaluate the 13 counties biodiversity of Yihe-Luohe River Basin in Henan Province.This study would help to give scientific decision-making about biodiversity conservation for management.The results show that: in this basin,there are 2882 vascular plant species;514 vertebrate species;114 types of nature ecosystem;1107 species that are unique to China;252 species in imminent danger and 53 exotic invasive plants species.Lushi,Songxian and Luanchuan counties of upper reaches have high biodiversity;middle reaches Luoning,Yiyang and Yichuan have moderate biodiversity;7 counties of lower reaches have medium low biodiversity.The biodiversity has large regional difference in this basin.