摘要
Thirty-four sampling sites for surface water and twenty-seven sampling sites for ground water in areas of different land use were selected in the Wujiang River Basin, upstream section in Guizhou Province, China. Carbonic anhydrase （CA） activity in surface and ground water was analyzed and compared. The results show that CA activity was detected in all surface and ground water samples. In general, average CA activity in surface and ground water was highest from samples in arbor lands, followed by shrub lands, shrub and grass lands, agricultural lands, and residential areas. The average CA activity in ground water from arbor lands, shrub lands, and shrub and grass lands was higher than that in surface water. Water CA activity was positively correlated with HCO3- concentration in surface water and ground water. These results imply that the contribution of CA in water to the karst carbon sink potential of river basins warrants further extensive and in-depth research.
在乌江流域上游段选取来自不同土地利用类型的34个地表水采样点和27个地下水采样点,比较研究不同土地利用类型对地表水及地下水水体碳酸酐酶(CA)活性的影响。结果表明,在乌江流域上游段来自不同土地利用类型的所有采样点的地表水及地下水中均能检测出CA活性。比较来自不同土地利用类型的地下水及地表水平均CA活性,总体而言,平均CA活性从高到低均依次为:乔木林地、灌木林地、灌草丛地、农业用地和居民区,而且,来自乔木林地、灌木林地和灌草丛地的地下水平均水体CA活性显著高于地表水。相关性分析结果表明,地表水和地下水中水体CA活性与HCO3-浓度均呈正相关。本研究结果表明水体CA对流域岩溶碳汇潜力的贡献值得进行广泛而深入的研究。
基金
Sub-project of Geological Survey Work Item of China Geological Survey Bureau(Grant No.12120113005200)
the Fundamental Research Funds for the Central Universities(Grant No.2015QN102)
