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| Biomass and composition of protistan grazers and heterotrophic bacteria in the Costa Rica Dome during summer 2010 | |
| Freibott, Alexandra1; Taylor, Andrew G.1; Selph, Karen E.2; Liu, Hongbin3; Zhang, Wuchang4; Landry, Michael R.1 | |
| 2016-03-01 | |
| 发表期刊 | JOURNAL OF PLANKTON RESEARCH
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| 卷号 | 38期号:2页码:230-243 |
| 文章类型 | Article |
| 摘要 | We investigated biomass and composition of heterotrophic microbes in the Costa Rica Dome during June-July 2010 as part of a broader study of plankton trophic dynamics. Because picophytoplankton (, 2 mm) are known to dominate in this unique upwelling region, we hypothesized tight biomass relationships between size-determined predator-prey pairs (i.e. picoplankton-nano-grazers, nanoplankton-micro-grazers) within the microbial community. Integrated biomass of heterotrophic bacteria ranged from 180 to 487 mg C m(-2) and was significantly correlated with total autotrophic carbon. Heterotrophic protist (H-protist) biomass ranged more narrowly from 488 to 545 mg C m(-2), and was comprised of 60% dinoflagellates, 30% other flagellates and 11% ciliates. Nano-sized (<20 mu m) protists accounted for the majority (57%) of grazer biomass and were positively correlated with picoplankton, partially supporting our hypothesis, but nanoplankton and micro-grazers (>20 mu m) were not significantly correlated. The relative constancy of H-protist biomass among locations despite clear changes in integrated autotrophic biomass, Chl a, and primary production suggests that mesozooplankton may exert a tight top-down control on micro-grazers. Biomass-specific consumption rates of phytoplankton by protistan grazers suggest an instantaneous growth rate of 0.52 day(-1) for H-protists, similar to the growth rate of phytoplankton and consistent with a trophically balanced ecosystem dominated by piconanoplankton interactions. |
| 关键词 | Heterotrophic Protists Microzooplankton Nanozooplankton Community Composition |
| DOI | 10.1093/plankt/fbv107 |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000372874300005 |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 版本 | 出版稿 |
| 条目标识符 | http://ir.qdio.ac.cn/handle/337002/126249 |
| 专题 | 海洋生态与环境科学重点实验室 |
| 作者单位 | 1.Univ Calif San Diego, Scripps Inst Oceanog, 9500 Gilman Dr, La Jolla, CA 92093 USA 2.Univ Hawaii Manoa, Dept Oceanog, Honolulu, HI 96822 USA 3.Hong Kong Univ Sci & Technol, Hong Kong, Hong Kong, Peoples R China 4.Chinese Acad Sci, Inst Oceanog, Qingdao, Peoples R China |
| 推荐引用方式 GB/T 7714 | Freibott, Alexandra,Taylor, Andrew G.,Selph, Karen E.,et al. Biomass and composition of protistan grazers and heterotrophic bacteria in the Costa Rica Dome during summer 2010[J]. JOURNAL OF PLANKTON RESEARCH,2016,38(2):230-243. |
| APA | Freibott, Alexandra,Taylor, Andrew G.,Selph, Karen E.,Liu, Hongbin,Zhang, Wuchang,&Landry, Michael R..(2016).Biomass and composition of protistan grazers and heterotrophic bacteria in the Costa Rica Dome during summer 2010.JOURNAL OF PLANKTON RESEARCH,38(2),230-243. |
| MLA | Freibott, Alexandra,et al."Biomass and composition of protistan grazers and heterotrophic bacteria in the Costa Rica Dome during summer 2010".JOURNAL OF PLANKTON RESEARCH 38.2(2016):230-243. |
| 条目包含的文件 | ||||||
| 文件名称/大小 | 文献类型 | 版本类型 | 开放类型 | 使用许可 | ||
| Biomass and composit（549KB） | 期刊论文 | 出版稿 | 限制开放 | CC BY-NC-SA | 浏览 | |
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