众所周知,在自然界,微生物的活动使有机物和无机物之间的转化得以不断进行,这对于维持生物圈的完整性是必不可少的,而生物圈是其他高等生物赖以生存的基础。在自然界水体,水生态系统与微生物活动关系是十分密切的,当进入水体的污染物过高以致超过微生物自净能力的限度,就会引起 It is a well-known fact that the activity of microorganisms in nature allows the transformation between organic matter and inorganic matter to continue. This is essential for maintaining the integrity of the biosphere, which is the basis for the survival of other higher organisms. In natural water bodies, the relationship between aquatic ecosystems and microbial activities is very close, when the pollutants into the water body is too high to exceed the limits of microbial self-purification capacity, it will cause