1Is it karst carbon sink or karst carbon flux?ZHANG Ying, LI Qiang539-5422Identifying methods of karst aquifer system structure in South ChinaLUO Ming-ming, YIN De-chao, ZHANG Liang, CHEN Zhi-hua, ZHOU Hong, HAN Zhao-feng, SHI Ting-ting543-5503An improved fuzzy comprehensive evaluation of water quality in karst aquifer based on level characteristic valuesYANG Zhen-hua, SU Wei-ci, WU Ke-hua, ZHANG Feng-tai, WANG Wei551-5594The assessment of water security in karst region by SPA model :A case study of Guizhou ProvinceSU Yin, GUAN Dong-jie, SU Wei-ci560-5695The origin of Na+ , Cl-and thermal source of karst groundwater in the stagnant area of Liulin spring basinJIA Zhen-xing, ZANG Hong-fei, ZHENG Xiu-qing570-5766Effects of heterogeneity of karst media on the hydrochemical parameters from vertical borehole logsLIU Shao-hua, TANG Qing-jia, YANG Li-chao, ZHANG Cheng, MIAO Ying577-5857Application of FEFLOW to the description of karst conduit flow modelLIU Jian-guo, XU Guang-zhao, MA Xue-li586-5908Spatial evolution simulation of karst rocky desertification based on Logistic-CA-Markov modelsMA Shi-bin, ZHANG Yong-rong, AN Yu-lun591-5989Biodiversity of bryophytes and their characteristics of ecological distribution in the second Lindai karst bauxite areaJI-ye, ZHANG Zhao-hui599-60610Impact of agricultural tourism activities on microbial community structure of soil in karst area:A case research of Tongliang district of Chongqing Huangjuemen Qicaimengyuan607-61511Humus on karst rock outcrops and their adsorption of ammonia nitrogen:A case from three ecosystems of Shilin, YunnanZHU Xi-ai, SHEN You-xin, HE Bei-bei, HUANG Jin616-62312Preliminary study on the diversity and antimicrobial activity of actinomycetes from Shuanghe Cave:A case study of Yinhedong and Shanlindong624-63013Risk assessment of managed fracture-karst aquifer recharge with roof rainwaterXU Qiao-yi, ZHOU Ya-qun, WANG Wei-ping, HUANG Qiang631-64114The influence of different pretreatment methods on the δ13C value of dissolved inorganic carbon in waterYANG Hui, WANG Hua, WU Xia, TANG Wei, TU Lin-ling, YING Qi-he642-64715@@648 