密云水库上游地区物种分布格局的环境因子分析——以潮关西沟林场为例

Analysis of Environment Factors for Distribution Pattern of Woody Species in Upstream Area of Miyun Reservoir——A Case Study in the Chaoguanxigou Forest Farm

生物多样性与生态环境的关系一直是生态学研究的重点。为了揭示环境因子对木本物种分布的重要作用,结合野外调查及室内地形因子分析,运用数量生态学分析方法分析了物种分布与环境因子间的关系。结果表明,研究区内乔木种共分为4类:耐旱阳生树种、林下耐阴树种、次生演替树种以及建群树种,其中耐旱阳生树种为研究内的多数种;坡向和海拔是影响研究区物种分布的重要因子,太阳辐射及土壤湿润状况影响较弱,坡度的影响最小;中低海拔的干旱阳坡上生物分布相对较多。

The relationship between biodiversity and ecological environment has been a key research point of ecology. In order to show the significant effect of environmental factors on distribution of woody species, the relationship between species distribution and environmental factors was analyzed by quantitative ecology method based on field investigation and indoor terrain factor analysis. The results showed that in the research area, the arbor species can be divided into four categories, including drought-tolerant and intolerant tree species, shadow-tolerant and understory tree species, secondary succession tree species, and dominant tree species, and the majority was drought-tolerant and intolerant tree species; elevation and aspect were the most important factors influencing distribution of woody species, solar radiation and soil moisture followed, and slope influenced the least; drought and sunny slope at mid-elevation had more species.