陇东董志塬植被生态现状及评价  

The investigation and evaluation of the natural vegetation in Dongzhi Plateau,easten Guansu Province

作　　者：梁明易[1] 刘谞承[1] 曾嘉强[1] 汪涛[1] 

机构地区：[1]环境保护部华南环境科学研究所

出　　处：《生态科学》2010年第4期351-357,共7页Ecological Science

基　　金：中国石油庆阳石化分公司300万吨级搬迁改选集中加工项目

摘　　要：调查了甘肃省庆阳市董志塬的自然植被，结果表明：董志塬主要自然群落类型包括3个植被型，4个植被亚型，14个群。共记录植物33科65属165种，以菊科（Compositae）、禾本科（Gramineae）、豆科（Leguminosae）、蔷薇科（Rosaceae）居多。塬内各植物群落生物量处于“Ⅴa-Ⅱ”水平，其中森林群落“Ⅲ～Ⅱ”、灌丛、草原群落“Ⅴa-Ⅳ”；生长量处于“Ⅴb～Ⅱ”，其中森林“Ⅲ～Ⅱ”、灌丛群落“Ⅳ～Ⅲ”、草原“Ⅴb～Ⅲ”；物种量处于“Ⅴa-Ⅲ”水平，其中森林和灌丛群落“Ⅴa-Ⅳ”、草原“Ⅳ～Ⅲ”；群落郁闭度处于“Ⅳ～Ⅱ”水平，其中森林和灌丛为“Ⅳ～Ⅱ”、草原“Ⅳ-Ⅲ”；群落结构度处于“Ⅳ～Ⅰ”水平，其中森林植被“Ⅱ～I”、灌丛群落“Ⅳ～Ⅱ”、草丛群落“Ⅳ-Ⅲ”。综合各群落盖度、物种量、生物量、生长量、群落结构等5项指标进行评价，董志塬内各天然植被群落类型综合评价等级为“Ⅳ～Ⅱ”的水平，其中森林群落综合水平均为“Ⅲ-Ⅱ灌丛群落和草原群落处于“Ⅳ-Ⅲ”水平。The natural vegetation was investigated in October 2006 in Dongzhi Plateau, Qinyang city, Gansu province. Based on the analysis of 23 sample plots in Dongzhi Plateau, the natural vegetation can be divided into 3 vegetation types, 4 vegetation subtypes and 14 formations, 165 species were recorded belonging to 65 genera in 33 families. The comprehensive index for evaluating the natural vegetation were integrated with 5 indices including coverage, species scalar, biomass, growth and structure characters, which could be grouped into 5 grades from Ⅴto Ⅰ. The results showed that the comprehensive index of the vegetations were graded from Ⅳto Ⅱ, among which the forest communities graded from Ⅲ to Ⅱ, the shrubs community and the steppes from Ⅳ-Ⅲ.

关 键 词：董志塬 植被生态 生态评价 

分 类 号：Q178[生物学—水生生物学]