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Abundance and distribution of planktonic Archaea and Bacteria in the waters west of the Antarctic Peninsula
Church, MJ; DeLong, EF; Ducklow, HW; Karner, MB; Preston, CM; Karl, DM
2003
发表期刊LIMNOLOGY AND OCEANOGRAPHY
ISSN0024-3590
卷号48期号:5页码:1893-1902
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.
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
学科领域Marine & Freshwater Biology ; Oceanography
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语种英语
文献类型期刊论文
条目标识符http://ir.scsio.ac.cn/handle/344004/9350
专题海洋微食物网高被引文献
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Church, MJ,DeLong, EF,Ducklow, HW,et al. Abundance and distribution of planktonic Archaea and Bacteria in the waters west of the Antarctic Peninsula[J]. LIMNOLOGY AND OCEANOGRAPHY,2003,48(5):1893-1902.
APA Church, MJ,DeLong, EF,Ducklow, HW,Karner, MB,Preston, CM,&Karl, DM.(2003).Abundance and distribution of planktonic Archaea and Bacteria in the waters west of the Antarctic Peninsula.LIMNOLOGY AND OCEANOGRAPHY,48(5),1893-1902.
MLA Church, MJ,et al."Abundance and distribution of planktonic Archaea and Bacteria in the waters west of the Antarctic Peninsula".LIMNOLOGY AND OCEANOGRAPHY 48.5(2003):1893-1902.
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