岷山地区大熊猫(Ailuropoda melanoleuca)生境影响因子连通性及主导因子

岷山地区是大熊猫保护的关键地区.运用图论分析法研究了岷山地区大熊猫生境影响因子,及其相互作用关系.结果表明:在岷山地区,12个影响因子66对组合中,47.0%的影响因子间存在直接的联系,其中89.2%的影响具有增大效应,这说明人类活动对大熊猫生境的影响具有协同增大效应,并占主导地位.研究发现,在影响因子关系集中,存在强连通性的子集K={(TD);(RB);(MI);(HPL);(AP);(AD);(SR);(TH);(FC)},这表明近期进行的旅游景点开发,公路建设,采矿,高压电线走廊建设,以及传统的农业开发,畜牧业,薪柴采集等影响因子之间存在着强烈相互作用关系,这些人类活动还会将其他人类活动对大熊猫生境的影响放大,加剧其对大熊猫生境的不利影响,是影响岷山地区大熊猫生境的主导因素.研究还表明如果不能对主导因子进行有效的控制,很难有效地保护岷山地区大熊猫生境.研究表明图论分析法是研究大熊猫生境影响因子的一个有效工具,有助于明确影响熊猫生境的主导和关键因子,为制定有效的大熊猫保护策略提供科学依据.

An assessment of giant panda(Ailuropoda melanoleuca)habitat stressors in Minshan region

The mountainous Minshan region has been the key region for giant panda conservation activities in China.In this paper,we applied the method of graph-theoreticto analyze and assess giant panda habitats stressors and their interactions.The results suggested that there existed 66 combinations between 12 stressors,among which 47.0% of the combinations directly interacted with each other,and 89.2% of interactions of stressors had aggravating effects.There was a strong linkage component K={(TD);(RB);(MI);(HPL);(AP);(AD);(SR);(TH);(FC)}.It meant that these stressors,including tourism activities and site construction,hydropower engineering,transportation,road construction,agricultural development,stock raising and fuel wood collection would create additional impacts on giant panda habitat through the interactions with other stressors.We were able to conclude that these were the predominate stressors for giant panda habitat in Minshan region.The study also demonstrated that graph-theoretic analysis was a useful tool to simplify the reticular interactions within the various giant panda habitat stressors and as a means to identify the main stressors.