祁连山自然保护区生态承载力分析与评价

Ecological Resilience of Qilian Mountain Nature Reserve.

以层次分析法和模糊模式识别为基础,建立生态承载力综合评价模型,重点分析祁连山自然保护区森林、草地和农田3种受人类活动干扰最强烈的生态系统的生态承载力和生态荷载,在此基础上进一步分析整个保护区的总体生态承载力和生态荷载。结果显示,祁连山区域生态系统已经受到人类活动的强烈干扰,生态荷载总体处于严重超载状态。但区域生态系统内部各子系统之间以及生态荷载的空间分布存在差异。其中,森林子系统和草地子系统属于严重超载,农田子系统属于中度超载;在总体生态荷载的空间分布上,西北部地区比东南部地区超载更为严重;就各子系统的生态荷载状况而言,森林子系统和草地子系统的超载程度均表现为东南部地区略低于西北部地区,但农田子系统东南部地区超载程度高于西北部地区。

With the aid of the technology of analytic hierarchy process and fuzzy pattern recognition, a comprehensive evaluation model is established and used to analyze ecological resilience and ecological load of forest, grassland and farmland ecosystems exposed to the strongest human interference in the Qilian Mountain Nature Reserve, and then of the reserve as a whole. Results show that the Qilian Mountain ecosystem has suffered strong human interference and has been exposed to ecological overload. But within the ecosystem, discrepancies do exist between subsystems in spatial distribution of ecological load. The subsystems of forest and grassland are seriously overloaded while that of farmland is medium overloaded. In terms of spatial distribution of ecological load, the northwest region is more heavier than the southeast;whereas in terms of overloading of subsystems,the subsystems of forest and grassland are less in the southeast than in the northwest,but the subsystem of farmland is more in the southeast than in the northwest.