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学科主题: Environmental Sciences & Ecology; Marine & Freshwater Biology; Microbiology
题名: Microbial food webs in marine sediments .1. Trophic interactions and grazing rates in two tidal flat communities
作者: Epstein, SS
刊名: MICROBIAL ECOLOGY
发表日期: 1997-01-01
卷: 34, 期:3, 页:188-198
英文摘要: The role of grazing by marine sediment flagellates, ciliates, and meiobenthic animals in controlling production of their bacterial and diatom prey was investigated. Several novel or modified techniques were used to enumerate prey (bacteria and diatoms), measure bacterial production, quantify proto- and micrometazoan predators, and evaluate rates of bacterivory and herbivory. The results indicated that, in a temperate, marine intertidal nat composed of fine sand, colorless nanoflagellates, ciliates, and nematodes were the most important bacterivores. Together, these organisms were responsible for removing up to 53% of bacterial production, by grazing. The observed rates of bacterivory were high enough to hypothesize that periods of grazing control of bacterial production might occur regularly in similar habitats. Colorless microflagellates, ciliates, and nematodes had high rates of diatom consumption. The combined small diatom consumption rate was equivalent to 132% of diatom standing stock per day. Trophic interactions between diatoms and micro-and meiobenthos might be a factor limiting growth of small (around 10 mu m) diatoms. In coarse sands of an open beach, all micrograzers except pigmented nanoflagellates were rare, whereas bacterial and diatom assemblages were rather abundant and active. In this type of sediment, the micrograzers were able to consume only a marginal percentage of bacterial production (< 1%) and diatom standing stock (3.8%), thus playing a minor role in controlling the dynamics of their prey.
语种: 英语
原文出处: 查看原文
内容类型: 期刊论文
URI标识: http://ir.scsio.ac.cn/handle/344004/9364
Appears in Collections:海洋微食物网高被引文献_期刊论文

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Epstein, SS.Microbial food webs in marine sediments .1. Trophic interactions and grazing rates in two tidal flat communities,MICROBIAL ECOLOGY,1997,34(3):188-198
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文件名: Microbial food webs in marine sediments .1. Trophic interactions and grazing rates in two tidal flat communities.pdf
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