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学科主题: Environmental Sciences & Ecology; Marine & Freshwater Biology; Microbiology
题名: ZOOPLANKTON-MEDIATED CHANGES OF BACTERIAL COMMUNITY STRUCTURE
作者: JURGENS, K ; ARNDT, H ; ROTHHAUPT, KO
刊名: MICROBIAL ECOLOGY
发表日期: 1994-01-01
卷: 27, 期:1, 页:27-42
部门归属: INST LIMNOL,A-5310 MONDSEE,AUSTRIA
英文摘要: Enclosure experiments in the mesotrophic Schohsee in northern Germany were designed to study the impact of metazooplankton on components of the microbial food web (bacteria, flagellates, ciliates). Zooplankton was manipulated in 500-liter epilimnetic mesocosms so that either Daphnia or copepods were dominating, or metazooplankton was virtually absent. The bacterial community responded immediately to changes in zooplankton composition. Biomass, productivity, and especially the morphology of the bacteria changed drastically in the different treatments. Cascading predation effects on the bacterioplankton were transmitted mainly by phagotrophic protozoans which had changed in species composition and biomass. When Daphnia dominated, protozoans were largely suppressed and the original morphological structure of the bacteria (mainly small rods and cocci) remained throughout the experiment. Dominance of copepods or the absence of metazoan predators resulted in a mass appearance of bacterivorous protists (flagellates and ciliates). They promoted a fast decline of bacterial abundance and a shift to the predominance of morphologically inedible forms, mainly long filaments. After 3 days they formed 80-90% of the bacterial biomass. The results indicate that metazooplankton predation on phagotrophic protozoans is a key mechanism for the regulation of bacterioplankton density and community structure.
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/344004/9332
Appears in Collections:海洋微食物网高被引文献_期刊论文

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Recommended Citation:
JURGENS, K; ARNDT, H; ROTHHAUPT, KO.ZOOPLANKTON-MEDIATED CHANGES OF BACTERIAL COMMUNITY STRUCTURE,MICROBIAL ECOLOGY,1994,27(1):27-42
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文件名: ZOOPLANKTON-MEDIATED CHANGES OF BACTERIAL COMMUNITY STRUCTURE.pdf
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