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学科主题: Environmental Sciences & Ecology; Marine & Freshwater Biology; Microbiology
题名: Coupling between bacterioplankton species composition, population dynamics, and organic matter degradation
作者: Pinhassi, J ; Azam, F ; Hemphala, J ; Long, RA ; Martinez, J ; Zweifel, UL ; Hagstrom, A
关键词: bacterioplankton ; species ; growth ; hybridization
刊名: AQUATIC MICROBIAL ECOLOGY
发表日期: 1999-01-01
卷: 17, 期:1, 页:13-26
部门归属: Kalmar Univ, S-39129 Kalmar, Sweden; Umea Univ, Dept Microbiol, S-90187 Umea, Sweden; Univ Calif San Diego, Scripps Inst Oceanog, Div Marine Biol Res, La Jolla, CA 92093 USA
英文摘要: To study the effect of substrate addition on short term bacterial population dynamics and species composition in seawater, mesocosms were maintained with water collected off Scripps Pier (La Jolla, California, USA). Protein enrichment (BSA) triggered a dynamic response from the microbial food web, whereas enrichment with starch had no effect. In the protein enriched mesocosm the number of both nucleoid-containing cells and metabolically active cells increased by 3.0 x 10(5) cells ml(-1) from Day 1 to Day 4. In the same time period the density of a set of 31 phylogenetically different bacteria (alpha- and gamma-Proteobacteria as well as Flexibacter-Cytophaga-Bacteroides) increased by 3.5 x 10(5) cells ml(-1). The abundance of these isolated bacteria accounted for up to 89 % of the nucleoid-containing cells, and up to 22 % of the total counts. Increased enzyme activities, most notably protease, were found concomitant with a change in bacterial species composition over 3 d. This short term succession was possible due to rapid net growth rates of single bacterial species in the mesocosm (0.48 to 1.6 d(-1)), which was up to 5 times higher than the community turnover calculated from bacterial production and total counts. These results should provide support for studies of actual bacterial population dynamics on the species level and its role in the degradation of organic matter in the aquatic environment.
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/344004/9310
Appears in Collections:海洋微食物网高被引文献_期刊论文

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Recommended Citation:
Pinhassi, J; Azam, F; Hemphala, J; Long, RA; Martinez, J; Zweifel, UL; Hagstrom, A.Coupling between bacterioplankton species composition, population dynamics, and organic matter degradation,AQUATIC MICROBIAL ECOLOGY,1999,17(1):13-26
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