吉林省长白县森林生态承载力评价

Forest ecological carrying capacity evaluation on Changbai County in Jilin Province

自然生态状况、发展过程中受到的压力以及区位条件均会对森林生态系统造成影响。基于当今生态问题和环境追究责任制的需要,将承载力与生态安全相结合,沿用PSR模型,以熵权法确定指标权重,分析吉林省长白县森林生态承载力变化情况。结果表明长白县森林生态承载力指数变化呈递增趋势,2013年达到峰值(0.68),明显高于全国水平(0.55),生态状况安全。同时其结果受状态指数和压力指数的共同影响,但压力指数影响较小,且一直保持较低水平,这与当地工业欠发达有关。森林生态承载力指数和状态指数曲线变化趋同,表明在三大指标群中,森林自身健康起着关键性作用,其对提升森林生态承载力和保障森林生态安全有着重要意义。

The forest ecosystem is affected by natural ecological conditional, economic development stress and geographical conditions. In this paper, we used PSR model and entropy weight method to evaluate the forest ecological carrying capacity in Changbai County in Jilin Province. The result showed that the forest ecological carrying capacity in Changbai County was increasing and reached its peak at 2013（0.68）, which was significantly higher than the national average of 0.55. Meanwhile, the forest ecological carrying capacity was affected by the state and pressure index jointly, but the effect induced by pressure index was little and it remained low. The result also showed that forest ecological carrying capacity and status index curve had a similar trend, which indicated that forest health was of important significance in promoting forest ecological carrying capacity and protecting the safety of forest ecology.