Community composition, distribution, and contribution of microbenthos in offshore sediments from the Yellow Sea
文献类型：期刊论文
| 作者 | Meng, Zhaocui1,2; Xu, Kuidong1 ; Lei, Yanli1
|
| 刊名 | CONTINENTAL SHELF RESEARCH
 |
| 出版日期 | 2011-09-15 |
| 卷号 | 31期号:14页码:1437-1446 |
| 关键词 | Microbenthos Distribution Abundance Biomass Sediment Yellow Sea |
| ISSN号 | 0278-4343 |
| 通讯作者 | Xu, KD (reprint author), Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China |
| 中文摘要 | We investigated the spatial distribution and composition of microbenthos in the seafloor sediments from 48 stations in the Yellow Sea using epifluorescence microscopy and quantitative protargol staining techniques. The bacterial abundance ranged from 2.4 x 10(8) to 1.9 x 10(9) cells cm(-3) in the wet sediment, about three orders of magnitude higher than that of phototrophic (PNFs, from 6.4 x 10(5) to 8.8 x 10(6) cells cm(-3)) and heterotrophic nanoflagellates (HNFs, from 5.8 x 10(4) to 5.9 x 10(6) cells cm(-3)) and four orders of magnitude higher than that of cyanobacteria (from 2.3 x 10(4) to 2.3 x 10(6) cells cm(-3)) in the upper 5 cm of sediments. The abundance of diatoms varied greatly, from 3-1.1 x 10(5) cells cm(-3) in the upper 8 cm of sediments, whereas those of heterotrophic microflagellates (HMFs, 1-182 cells cm(-3)) and ciliates (1-221 cells cm(-3)) were less varied and lower. The biomass partitioning indicates the primary importance of benthic bacteria (503 mu g C cm(-3) on average), followed by PNFs (40.7 mu g C cm(-3)), HNFs (19.3 mu g C cm(-3)), and finally by cyanobacteria (8.8 mu g C cm(-3)). Benthic diatoms (0.8 mu g C cm(-3)), ciliates (0.15 mu g C cm(-3)), and HMFs (0.03 mu g C cm(-3)) contribute relatively small fractions to the total biomass of the microbenthos. About 95% of diatoms, 77% of ciliates, and 56% of HMFs were distributed in the upper 2 cm of sediments, whereas no distinct vertical distributions were observed for bacteria, cyanobacteria, PNFs, and HNFs. The microbenthos are quantitatively important in the shallow seafloor, wherein their main components have an average abundance three orders of magnitude higher than the corresponding planktonic organisms in the same sea area. Our estimates indicate that pico-sized phytobenthos might contribute a large proportion to the primary production. Benthic ciliates and heterotrophic flagellates contribute about 90% to the estimated combined metabolic rate of micro- and meiobenthic consumers in the whole sea area, with nanoheterotrophs accounting for the majority. The data suggest the potential for the rapid primary and secondary production of microbenthos and detrital utilization in the shallow seafloor sediments of the Yellow Sea. (C) 2011 Elsevier Ltd. All rights reserved. |
| 英文摘要 | We investigated the spatial distribution and composition of microbenthos in the seafloor sediments from 48 stations in the Yellow Sea using epifluorescence microscopy and quantitative protargol staining techniques. The bacterial abundance ranged from 2.4 x 10(8) to 1.9 x 10(9) cells cm(-3) in the wet sediment, about three orders of magnitude higher than that of phototrophic (PNFs, from 6.4 x 10(5) to 8.8 x 10(6) cells cm(-3)) and heterotrophic nanoflagellates (HNFs, from 5.8 x 10(4) to 5.9 x 10(6) cells cm(-3)) and four orders of magnitude higher than that of cyanobacteria (from 2.3 x 10(4) to 2.3 x 10(6) cells cm(-3)) in the upper 5 cm of sediments. The abundance of diatoms varied greatly, from 3-1.1 x 10(5) cells cm(-3) in the upper 8 cm of sediments, whereas those of heterotrophic microflagellates (HMFs, 1-182 cells cm(-3)) and ciliates (1-221 cells cm(-3)) were less varied and lower. The biomass partitioning indicates the primary importance of benthic bacteria (503 mu g C cm(-3) on average), followed by PNFs (40.7 mu g C cm(-3)), HNFs (19.3 mu g C cm(-3)), and finally by cyanobacteria (8.8 mu g C cm(-3)). Benthic diatoms (0.8 mu g C cm(-3)), ciliates (0.15 mu g C cm(-3)), and HMFs (0.03 mu g C cm(-3)) contribute relatively small fractions to the total biomass of the microbenthos. About 95% of diatoms, 77% of ciliates, and 56% of HMFs were distributed in the upper 2 cm of sediments, whereas no distinct vertical distributions were observed for bacteria, cyanobacteria, PNFs, and HNFs. The microbenthos are quantitatively important in the shallow seafloor, wherein their main components have an average abundance three orders of magnitude higher than the corresponding planktonic organisms in the same sea area. Our estimates indicate that pico-sized phytobenthos might contribute a large proportion to the primary production. Benthic ciliates and heterotrophic flagellates contribute about 90% to the estimated combined metabolic rate of micro- and meiobenthic consumers in the whole sea area, with nanoheterotrophs accounting for the majority. The data suggest the potential for the rapid primary and secondary production of microbenthos and detrital utilization in the shallow seafloor sediments of the Yellow Sea. (C) 2011 Elsevier Ltd. All rights reserved. |
| 学科主题 | Oceanography |
| 收录类别 | SCI |
| 原文出处 | 10.1016/j.csr.2011.06.008 |
| 语种 | 英语 |
| WOS记录号 | WOS:000295438900005 |
| 公开日期 | 2012-07-03 |
| 版本 | 出版稿 |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/11388]  |
| 专题 | 海洋研究所_海洋生物分类与系统演化实验室 |
| 作者单位 | 1.Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Meng, Zhaocui,Xu, Kuidong,Lei, Yanli. Community composition, distribution, and contribution of microbenthos in offshore sediments from the Yellow Sea[J]. CONTINENTAL SHELF RESEARCH,2011,31(14):1437-1446. |
| APA | Meng, Zhaocui,Xu, Kuidong,&Lei, Yanli.(2011).Community composition, distribution, and contribution of microbenthos in offshore sediments from the Yellow Sea.CONTINENTAL SHELF RESEARCH,31(14),1437-1446. |
| MLA | Meng, Zhaocui,et al."Community composition, distribution, and contribution of microbenthos in offshore sediments from the Yellow Sea".CONTINENTAL SHELF RESEARCH 31.14(2011):1437-1446. |
入库方式： OAI收割
来源：海洋研究所
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