人为因素导致的盐度变化对Kinneret湖水细菌种群的影响

THE INFLUENCE OF ARTIFICIALLY INDUCED SALINITY CHANGES ON THE BACTERIAL POPULATION IN LAKE KINNERET

由于Ｋｉｎｎｅｒｅｔ湖周围的诸多盐泉被人为地导入其下游的约旦河，使得Ｋｉｎｎｅｒｅｔ湖水的盐度逐渐下降，这对作为主要工农业用水和饮用水资源的Ｋｉｎｎｅｒｅｔ湖来说是非常有价值的。然而，对湖水中的细菌来说则可能产生不同的影响。作者通过实验研究发现，湖水盐度的变化导致细菌种群的改变，从而使我们观察到盐度与细菌之间的关系。这些结果表明：盐度变化对湖水水质保护对策和将来一段时间内湖水管理政策的制定都具有重要的意义。

Recent diversion of external salt spring has resulted in a steady decrease of the salinity in Lake Kinneret (Israel). Since Kinneret waters are primarily used for domestic purposes, the decrease in salinity is considered worthwhile but changes in salinity might be detrimental to endemic organisms in the lake. By means of experimental analysis, it was found that changes in salinity of the lake water caused a shift in the bacterial population structures. Moreover, a relationship between the salinity and the size of bacterial populations was observed. The results indicate that salinity changes are important in the preservation of water quality and for future lake managements.