摘要
基于模糊综合评判理论,以冀北辽河源分布的华北落叶松林、油松林和山杨+白桦林3种典型群落为对象,选取优势树种更新潜力、物种多样性、Godron指数、林下生产力和群落立地质量5个指标作为构建评价模型的参数,通过计算各群落5项指标隶属度的平均值来评价群落的稳定性。结果表明:3种典型群落多样性表现为:山杨+白桦林>油松林>华北落叶松林,群落稳定性大小为油松>华北落叶松>山杨+白桦林,多样性不能完全代表群落稳定性,稳定性是由群落各种因子共同作用的结果,评价群落稳定性要在考虑多样性这个必要条件外结合优势群落种群的年龄结构及其他外界干扰。
The forest community stability was evaluated by calculating the mean of subordinate function value of a model which was eatablished based on fuzzy synthetic evaluation by five indices of regeneration of dominant spe- cies, total species diversity, Godron index, site quality and woodland productivity in Larix principis - rupprechtii, Pinus tabulaeformis and Populus davidiana ＋ Betula nities in Liaohe river sourse region in Northern Hebei platyphylla communities which were the main forest commu- Province. The results showed that forest community diversi- ties of the three forest communities ranked in the decreasing order of Populus davidiarta ＋ Betula platyphylla 〉 Pinus tabulaeformis 〉 Larix principis - rupprechtii, and communities stability had a trend of Pinus tabulaeformis 〉 Larix principis - rupprechtii 〉 Populus davidiana ＋ Betula platyphylla. Stability was the result of various fac- tors acting on together and the diversity could not fully represent the stability. In addition to the necessary condi- tion for diversity, age structure of dominant species and other interference should be considered when evaluating community stability.
出处
《干旱区资源与环境》
CSSCI
CSCD
北大核心
2015年第5期93-98,共6页
Journal of Arid Land Resources and Environment
基金
林业公益性行业科研专项(项目编号:201204101)资助
关键词
群落稳定性
模糊综合评判
冀北辽河源
物种多样性
community stability
fuzzy synthetic evaluation
Liaohe River in North Hebei species diversity
