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学科主题: Marine & Freshwater Biology; Oceanography
题名: Abundance and distribution of planktonic Archaea and Bacteria in the waters west of the Antarctic Peninsula
作者: Church, MJ ; DeLong, EF ; Ducklow, HW ; Karner, MB ; Preston, CM ; Karl, DM
刊名: LIMNOLOGY AND OCEANOGRAPHY
发表日期: 2003-01-01
卷: 48, 期:5, 页:1893-1902
部门归属: Coll William & Mary, Sch Marine Sci, Gloucester Point, VA 23062 USA; Monterey Bay Aquarium Res Inst, Moss Landing, CA 95039 USA; Univ Hawaii, Dept Oceanog, Honolulu, HI 96822 USA
英文摘要: Polyribonucleotide probes targeting planktonic archaeal (Group I and II) and bacterial rRNA revealed that Archaea comprised a significant fraction of total prokaryote cell abundance in the marine waters west of the Antarctic Peninsula. Determinations of Archaea and Bacteria cell abundances were made during two research cruises to the Palmer Long-Term Ecological Research region during the austral winter and summer of 1999. During the austral summer, surface water abundances of Group I (GI) Archaea were generally low, averaging 4.7 x 10(3) cells ml(-1) and accounting for 1% of the total picoplankton assemblage. The abundance of GI Archaea increased significantly with depth, averaging 2.1 x 10(4) cells ml(-1) and comprising 9-39% of the total picoplankton abundance in the meso(150-1,000 m) and bathypelagic (1,000-3,500 m) circumpolar deep water (CDW). Relative to summertime distributions, GI cells were more evenly distributed throughout the water column during the winter, averaging 10% of the picoplankton in the surface waters and 13% in the CDW Surface water GI abundance increased 44% between the summer and winter, coincident with a fivefold decrease in GI abundance in the deeper waters. The abundance of Group II (GII) Archaea was persistently <2% of the total picoplankton throughout the water column in both summer and winter. Bacterial abundance was greatest in the upper water column (0-100 m) during the summer, averaging 3.9 x 10(5) cells ml(-1) and comprised 89% of the total picoplankton assemblage. Generally, GI Archaea varied seasonally in the deeper waters, whereas bacterial abundance varied more in the upper waters. The observed variability in bacterial and archaeal abundance suggests that these two groups of marine picoplankton are dynamic components of Southern Ocean 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/344004/9350
Appears in Collections:海洋微食物网高被引文献_期刊论文

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Church, MJ; DeLong, EF; Ducklow, HW; Karner, MB; Preston, CM; Karl, DM.Abundance and distribution of planktonic Archaea and Bacteria in the waters west of the Antarctic Peninsula,LIMNOLOGY AND OCEANOGRAPHY,2003,48(5):1893-1902
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