白水江保护区植物物种多样性垂直带优先保护评价  

Evaluation priority in protection of vertical vegetation zones in Baishuijiang nature reserve

作　　者：黄华梨[1] 王建宏[1] 孙学刚[2] 卢镝[2] 任景成 

机构地区：[1]甘肃白水江国家级自然保护区管理局,甘肃文县746400 [2]甘肃农业大学林学院,兰州730070

出　　处：《兰州大学学报（自然科学版）》2011年第4期82-90,共9页Journal of Lanzhou University(Natural Sciences)

基　　金：甘肃省中青年科技基金项目(0711RJYK006)

摘　　要：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运算的结果为依据,对白水江自然保护区植被垂直分布带进行了优先保护评价,评价结果表明植物优先保护的顺序依次为常绿落叶阔叶混交林带、落叶阔叶林带、常绿阔叶林带、针阔混交林带、亚高山针叶林带、高山灌丛草甸带,评价指标的综合值依次为78.60,57.32,57.20,38.18,14.08,3.27.常绿落叶阔叶混交林带拥有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植被带.评价指标的综合值随海拔梯度由常绿阔叶林带的57.20增至常绿落叶阔叶混交林带的78.60后持续减小,体现了物种多样性随海拔升高的单峰分布格局.这种分布格局主要是由不同海拔梯度所产生的水热状况的差异形成的,同时也与低海拔地区强烈的人为干扰和高海拔山地的面积较小等因素有关.The natural unit for building a secondary priority in the protection of plant indicators and AHP was based on the results of operations and on the vertical distribution of vegetation in Baishuijiang nature reserve.The work was carried out with a conservation priority assessment,which showed that the priorities for plant conservation is in such an order：the evergreen and deciduous broad-leaved forest zone,deciduous broadleaf forest,evergreen broad-leaved forest,coniferous forest zone in Asia,high mountain coniferous forest and alpine shrub meadow.The comprehensive evaluation index values are 78.60,57.32,57.20,38.18,14.08,3.27 respectively.Deciduous broad-leaved evergreen mixed forest contains a variety of subtropical and temperate plant species,but the state protection,rare and endangered,unique,single（widowed） types are concentrated in the most protected areas and plant conservation priority vegetation zones.The comprehensive evaluation index values along an elevation gradient from the evergreen broad-leaved evergreen to deciduous forest are from 57.20 to 78.60,following the broad-leaved forest zone which has had a continuous decrease and reflecting the diversity of species with a single peak distribution pattern of elevation.This distribution pattern is mainly generated at different altitudes where the thermal regime of water is formed,but it also has a strong low-altitude and high altitude anthropogenic interference with the smaller mountains and other factors.

关 键 词：植被垂直带 层次分析法 评价指标 综合评价值 

分 类 号：Q948.3[生物学—植物学]