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学科主题: Microbiology
题名: Significance of predation by protists in aquatic microbial food webs
作者: Sherr, EB ; Sherr, BF
关键词: bacterivory ; herbivory ; microbial food webs ; pelagic ecosystems ; phagotrophy ; protists
刊名: ANTONIE VAN LEEUWENHOEK INTERNATIONAL JOURNAL OF GENERAL AND MOLECULAR MICROBIOLOGY
发表日期: 2002-01-01
卷: 81, 期:1-4, 页:293-308
部门归属: Oregon State Univ, Coll Ocean & Atmospher Sci, Corvallis, OR 97331 USA
英文摘要: Predation in aquatic microbial food webs is dominated by phagotrophic protists, yet these microorganisms are still understudied compared to bacteria and phytoplankton. In pelagic ecosystems, predaceous protists are ubiquitous, range in size from 2 mum flagellates to >100 mum ciliates and dinoflagellates, and exhibit a wide array of feeding strategies. Their trophic states run the gamut from strictly phagotrophic, to mixotrophic: partly autotrophic and partly phagotrophic, to primarily autotrophic but capable of phagotrophy. Protists are a major source of mortality for both heterotrophic and autotrophic bacteria. They compete with herbivorous meso- and macro-zooplankton for all size classes of phytoplankton. Protist grazing may affect the rate of organic sinking flux from the euphotic zone. Protist excretions are an important source of remineralized nutrients, and of colloidal and dissolved trace metals such as iron, in aquatic systems. Work on predation by protists is being facilitated by methodological advances, e. g., molecular genetic analysis of protistan diversity and application of flow cytometry to study population growth and feeding rates. Examples of new research areas are studies of impact of protistan predation on the community structure of prey assemblages and of chemical communication between predator and prey in microbial food webs.
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/344004/9288
Appears in Collections:海洋微食物网高被引文献_期刊论文

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Recommended Citation:
Sherr, EB; Sherr, BF.Significance of predation by protists in aquatic microbial food webs,ANTONIE VAN LEEUWENHOEK INTERNATIONAL JOURNAL OF GENERAL AND MOLECULAR MICROBIOLOGY,2002,81(1-4):293-308
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