Abstract:The origin and distribution of carbonic anhydrase (CA) which could accelerate Karst processes were explored in this paper. The soil samples used in the experiment were collected from Jinfu Mountain of Chongqing,Misuga of Liu Panshui, Nongla of Guangxi and the Yaji Karst Experimental Site of Guilin, representing different Karst ecosystems of southwest China. The CA activities of the soil samples were determined according to the pH decline method. The results indicated that the CA activity could be detected ...