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北海道大学水産科学研究彙報 = Bulletin of Fisheries Sciences, Hokkaido University >
第64巻 第2号 >

北海道東部厚岸湖および厚岸湾における微生物食物網を構成する 微生物群の春季から初夏の変動

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Title: 北海道東部厚岸湖および厚岸湾における微生物食物網を構成する 微生物群の春季から初夏の変動
Other Titles: Temporal fluctuations of constituent microorganisms of the microbial food webs from spring to early summer at Akkeshi-ko Estuary and Akkeshi Bay, Eastern Hokkaido, Japan
Authors: 大西, 由花1 Browse this author
山口, 篤2 Browse this author →KAKEN DB
今井, 一郎3 Browse this author →KAKEN DB
Authors(alt): ONISHI, Yuka1
IMAI, Ichiro3
Keywords: Microbial loop
Seagrass bed
Zostera marina
Heterotrophic nanoflagellates
Autotrophic nanoflagellates
Issue Date: 31-Jul-2014
Publisher: 北海道大学大学院水産科学研究院
Journal Title: 北海道大学水産科学研究彙報
Volume: 64
Issue: 2
Start Page: 45
End Page: 54
Abstract: Temporal fluctuations of bacteria, heterotrophic nanoflagellates (HNF), autotrophic nanoflagellates (ANF) and ciliates were investigated from spring to early summer at the stations in Akkeshi-ko Estuary with large scale seagrass bed of Zostera marina and Akkeshi Bay, Eastern Hokkaodo, Japan. The ranges of bacterial density were 5.4×105-3.0×106 cells mL-1 in Akkeshi-ko Estuary (Stn. 1) and 2.3×105-1.9×106 cells mL-1 in Akkeshi Bay (Stns. 2, 3). The ranges of HNF were 3.1×102-3.3×103 cells mL-1 in the estuary and 2.2×101-1.1×103 cells mL-1 in the bay. The densities of ANF were 1.8×102-5.0×104 cells mL-1 (Stn. 1) and 2.2×101-3.6×104 cells mL-1 (Stns. 2, 3). The densities of microorganisms were higher in the coastal area than offshore.  In contrast, ciliate densities were <80-9.8×103 inds. L-1 in the estuary and <80-1.1×104 inds. L-1 in the bay. Significant correlations were found between HNF and ANF, temperature and them, suggesting that major parts of ANF were mixotrophs of bacterial grazers like HNF.
Type: bulletin (article)
Appears in Collections:北海道大学水産科学研究彙報 = Bulletin of Fisheries Sciences, Hokkaido University > 第64巻 第2号

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