METABOLIC-ACTIVITY AND BIOLUMINESCENCE OF OCEANIC FECAL PELLETS AND SEDIMENT TRAP PARTICLES
METABOLIC-ACTIVITY AND BIOLUMINESCENCE OF OCEANIC FECAL PELLETS AND SEDIMENT TRAP PARTICLES
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DOI：
10.1038/307539a0
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发表时间：
1984-01-01
期刊：
影响因子：
64.8
通讯作者：
FOWLER, SW
中科院分区：
文献类型：
--
作者：
ANDREWS, CC;KARL, DM;FOWLER, SW
浮游动物粪便颗粒是重要的垂直运输和交换的元素在海洋生态系统1，2。虽然微生物，特别是细菌，过程涉及水生粪便颗粒的分解3 -7，但有关微生物代谢活动和生长特征的定量数据很少。作为顶点（垂直运输和交换）计划的一部分，我们使用现场收集的已知来源和年龄的粪便颗粒研究了这些方面。我们的研究结果，在这里报道，表明，微生物的生物量和代谢活性是最高的排泄时，并与随后的孵育下降。从这些实验中的一个独立的观察是在新鲜排泄的粪便颗粒和从沉积物收集的材料中检测生物发光。这些现场数据支持现有的模型，细菌光发射的生态作用，在海洋中层区。
Zooplankton faecal pellets are important in the vertical transport and exchange of elements in the oceanic ecosystem1,2. Although microbial, and in particular bacterial, processes have been implicated in the decomposition of aquatic faecal pellets3–7, few quantitative data exist on the metabolic activities and growth characteristics of the associated microorganisms. As part of the Vertex (Vertical Transport and Exchange) programme, we studied these aspects using field-collected faecal pellets of known source and age. Our results, reported here, show that microbial biomass and metabolic activity are highest at the time of egestion, and decline with subsequent incubation. An independent observation from these experiments was the detection of bioluminescence in freshly excreted faecal pellets and in materials collected from sediment traps. These field data support an existing model for the ecological role of bacterial light emission in the mesopelagic zone of the ocean.