图门江流域*人口变化对森林生态资源的影响

本文以近百年来图门江流域我国一侧的人口变化过程为主导因子,历史地分析了森林植被破坏以后,一系列生态资源所受到的影响,并以珍贵毛皮兽紫貂为例,定量地分析了珍贵生物资源在该流域濒临绝迹的原因及历程。

THE IMPACT OF POPULATION CHANGE ON FOREST ECOLOGY AND RESOURCES IN THE WATERSHED OF THE TUMEN RIVER

This paper deals with the impact of human activities on forest and ecology resources in the watershed of the Tumen River. It shows that the key factor that makes forest deteriorate and ecological conditions worsen is population growth. In the last century the population increased by more than a hundrand times. As a result, 83% of the forest vegetation was des'-royed.The statistic data give us a regression equation of population (P) with respect to time(T)P = aX*exp bXP -c/P)] where a = 0.9378,b= 0.035694And at the same time, the area of virgin forest (S) with respect to population (P) could be expressed by the equationS (P)=2Xexp -(bXP-c/P)]where S is the area of virgin forest, P is the population number, a = 1.8023, b= 0.023, and c = 0.0289Of course, what we has lost is not only a forest itself but also its by-products. The paper tries to analyze the ill effects of vegetation deterioration on natural resources historically. For example, the fur of marten, which is a precious fur and is one of the so-called three-treasures of the Northeast, has been analyzed quantitatively.