Who contribute to supply microbial available organic matter in marine "microbial loop"?

微生物有效有机质向海洋“微生物环”的供应机制尚未得到很好的描述。本研究在不同的情况下(观察和实验)研究了降解海水中生物有机分子的胞外酶的活性及其分布。结果表明，海水中检测到的有机物降解酶肯定但不是全部来源于异养菌。海水中的部分有机物水解酶可能来源于细菌以外的微生物，如原生动物。有机质在海洋“微生物环”中降解和利用的整个机理还需要进一步的研究。

Supplying mechanisms of microbial available organic matter to marine "microbial loop" is not well described. In this study, activities and its profiles of extracellular enzymes which degrade bioorganic molecules in seawater were investigated in various situations (observations and experiments). As results, it was revealed that organic matter degradation enzymes detected in seawater were surely but not all derived from heterotrophic bacteria. Part of organic matter hydrolytic enzymes in seawater might be derived from microbes other than bacteria such as protozoa. Further investigation is needed to understand whole mechanism of organic matter degradation and utilization in marine "microbial loop".