白水江自然保护区次级自然单元植物优先保护评价

Evaluation of Secondary Natural Units Priority to Protection of Plant in Baishuijiang Nature Reserve

以构建的次级自然单元植物优先保护评价指标体系及层次分析法(AHP)运算结果为依据,对白水江自然保护区次级自然单元(沟系)进行了划分和优先保护评价。结果表明:中东部的让水河流域汇聚了保护区亚热带和温带的多种植物种类,同时也是国家重点保护、珍稀濒危、特有、单(寡)型类型集中分布的区域,是保护区植物保护的最优先区;由于海拔和经纬度地带性所产生的水热条件的影响,保护区低海拔的东南部区域珍稀濒危、特有单(寡)型植物及物种的丰富度普遍比西北部地区高,植物物种多样性保护的重点应在包括让水河流域在内的中东部地区。

Based on building the system priority to plant protection of natural secondary unit and the results of AHP,the secondary nature unit of Baishuijiang Nature Reserve were divided and evalucated.The results showed that not only a variety of plant species in subtropical and temperate zone bring together at the region of Rangshui river,but also the state protection,rare and endangered,unique,single plant species gathering distributed there,so the region of Rangshui river is a plant conservation priority area of Baishuijiang Nature Reserve;the impact of hydrothermal condi-tions as the altitude latitude and longitude zonality,rare and endangered,endemic single（few） types of plants and species richness were generally higher than the north-west in the southeastern low elevation area of Nature Reserve,plant species diversity protecting should be focused on Middle Eastern region including the region of Rangshui river.