Microbial Degradation of North Sea Macroalgae: Field and Laboratory Studies
Microbial Degradation of North Sea Macroalgae: Field and Laboratory Studies
复制标题
北海大型藻类的微生物降解：现场和实验室研究
DOI：
10.1515/botm.1989.32.3.241
复制
发表时间：
1989
期刊：
影响因子：
--
通讯作者：
M. Rieper
中科院分区：
文献类型：
--
作者：
M. Rieper
大量的细菌能够利用产品的大型藻类被发现在水中与藻类植物，比在水中没有藻类生长。纤维素，藻酸盐，明胶和甘露醇降解剂是最常见的在水中，在附近的沉积物和藻类碎片。在所有栖息地中，4月至10月之间发现的数量最多。用落射荧光显微镜的方法，在水中发生的细菌的季节性并不明显。用红、棕和绿色藻类在垃圾袋中进行的大型藻类分解实验表明，在夏季，60 - 90%的藻类干重损失发生在暴露的前两周，而在冬季，类似的材料损失需要4 - 6周。C：氮比普遍下降，在降解过程中，除了碳的损失，可能有一个丰富的氮由于细菌定植的藻类表面。在实验室微宇宙实验中，当食菌纤毛虫和线虫存在时，降解过程增强。降解速率可比的领域。
Larger numbers of bacteria capable of utilizing products of macroalgae were found in water associated with algal vegetation, than in water without algal growth. Cellulose-, alginate-, gelatine-, and mannitol degraders were most common in the water, in nearby sediment and on algal fragments. In all habitats the highest numbers were found between April and October. With the method of epifluorescence microscopy, the seasonality of bacteria occurring in the water was not as pronounced. Macroalgal decomposition experiments in litter bags in situ with red, brown and green algae showed that in summer 60 — 90% of the algal dry weight loss occurs during the first two weeks of exposure whereas in winter 4 to 6 weeks were required for a similar loss of material. The C: N ratio generally decreased during degradation; besides a loss of carbon, there may be an enrichment of nitrogen due to bacterial colonization of algal surfaces. In laboratory microcosm experiments, the degradation processes were enhanced when bacterivorous ciliates and nematodes were present. Degradation rates comparable to those in the field were obtained.