石漠化演化过程的非线性探讨——以贵州铜仁地区为例

A Case Study on Non-linear Relationship of Rocky Desertification Evoluted in Tongren Prefecture, Guizhou Province

石漠化是喀斯特地貌地区最大的生态问题,是在岩溶等自然因素和人类活动等因素的影响下不断进行着演化,人为因素是喀斯特山区石漠化演化的主要因素。人为因素是受政府的调控行为制约的,政府行为的影响是喀斯特山区石漠化演化过程中的关键因素,政府调控包括经济投入、科技投入及调控力度等。正面调控会维持喀斯特山区生态系统的稳定,政府行为的负面调控会加速石漠化的演化。初步探索了政府调控作用在喀斯特山区生态系统石漠化演化过程所具有的非线性关系,并且政府的经济投入、科技投入及调控力度所赋予的权重值在(0,0.5)时,政府的调控不够,使喀斯特山区生态系统向石漠化演化,只有在政府的经济投入、科技投入及调控力度所赋予的权重值在(0.5,1),才会使石漠化向稳定的喀斯特山区生态系统演化,这对石漠化治理、抑制石漠化扩展有一定的实际意义。

Rocky desertification is the biggest ecological problems in the Karst area,which is evolving under natural factors and human activities.Artificial factor influenced by the government’s regulatory action is the major factors in the evolution of Karst mountainous rocky desertification, including economic, scientific and technological investment and control strength. Positive regulations will maintain the stability of Karst mountainous ecosystems, while negative regulations will speed up the evolution of rocky desertification.The preliminary study shows that these factors have non-linear relationship with evolution of rocky desertification, and the government’s economic investment, technology and regulatory efforts were given the value (0, 0.5), manifesting the government’s regulation is not enough, which further evolve from the Karst mountainous ecosystems to rocky desertification, only by the government’s economic investment,technology and regulatory efforts were given the value (0.5,1) which will put the rocky desertification to stablize Karst mountainous ecosystem.The study have some practical significance in controlling and inhibiting the expansion of rocky desertification.