NDLI: Effects of an Artificial Breakwater on the Distributions of Planktonic Microbial Communities

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Effects of an Artificial Breakwater on the Distributions of Planktonic Microbial Communities

Content Provider	Springer Nature Link
Author	Kim, Young Ok Yang, Eun Jin Kang, Jung Hoon Shin, Kyoungsoon Chang, Man Myung, Cheol Soo
Copyright Year	2007
Abstract	The summer distributions of planktonic microbial communities (heterotrophic and phtosynthetic bacteria, phtosynthetic and heterotrophic nanoflagellates, ciliate plankton, and microphytoplankton) were compared between inner and outer areas of Lake Sihwa, divided by an artificial breakwater, located on the western coast of Korea, in September 2003. The semienclosed, inner area was characterized by hyposaline surface water (<17 psu), and by low concentrations of dissolved oxygen (avg. 0.4 mg L$^{1}$) and high concentrations of inorganic nutrients (nitrogenous nutrients >36 μM, phosphate <4 μM) in the bottom layer. Higher densities of heterotrophic bacteria and nanoflagellates also occurred in the inner area than did in the outer area, while microphytoplankton (mainly diatoms) occurred abundantly in the outer area. A tiny tintinnid ciliate, Tintinnopsis nana, bloomed into more than 10$^{6}$ cells L$^{1}$ at the surface layer of the inner area, while its abundance was much lower (10$^{3}$-10$^{4}$ cells L$^{1}$) in the outer area of the breakwater. Ciliate abundance was highly correlated with heterotrophic bacteria (r = 0.886, p < 0.001) and heterotrophic flagellates (r = 0.962, p < 0.001), indicating that rich food availability may have led to theT. nana bloom. These results suggest that the breakwater causes the eutrophic environment in artificial lakes with limited flushing of enriched water and develops into abundant bacteria, nanoflagellates, and ciliates.
Starting Page	9
Ending Page	17
Page Count	9
File Format	PDF
ISSN	17385261
Journal	Ocean Science Journal
Volume Number	42
Issue Number	1
Language	English
Publisher	Korea Ocean Research and Development Institute and The Korean Society of Oceanography
Publisher Date	2007-01-01
Publisher Place	Seoul
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	bloom breakwater ciliates heterotrophic bacteria nanoflagellates microphytoplankton Oceanography Marine & Freshwater Sciences Waste Water Technology Water Pollution Control Water Management Aquatic Pollution
Content Type	Text
Resource Type	Article
Subject	Oceanography

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