Seasonal Variation of Inorganic Nutrient Uptake by Heterotrophic Bacterioplankton in Jiaozhou Bay,North China |
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| Authors: | J Bai K R Li D Y Liu J Zhang H F Zhang G S Liu J L Li Z Y Li D M Gao |
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| Institution: | (1) Laboratory of Marine Environmental Science and Ecology, Ocean University of China, 238 Songling Road, Qingdao, 266100, People’s Republic of China;(2) College of Marine Life Science, Ocean University of China, 5 Yushan Road, Qingdao, 266003, People’s Republic of China;(3) College of Chemistry and Chemical Engineering, Ocean University of China, 5 Yushan Road, Qingdao, 266003, People’s Republic of China;(4) State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Zhongshan Road North, Shanghai, 200062, People’s Republic of China;(5) East China Sea Environmental Monitoring Center of State Oceanic Administration, Shanghai, 200137, People’s Republic of China;(6) College of Oceanography and Environmental Science, Xiamen University, Xiamen, 361005, People’s Republic of China;(7) School of Earth and Environmental Sciences, University of Wollongong, Wollongong, NSW2522, Australia |
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| Abstract: | The distribution patterns and factors affecting uptake rates and turnover times of dissolved inorganic nutrients by heterotrophic
bacterioplankton (HB) in Jiaozhou Bay were studied based on in situ surveys and laboratory culturing. The uptake rates of
dissolved inorganic phosphorus (DIP) and dissolved inorganic nitrogen (DIN) by HB are limited by the temperature of the water
and the concentration of dissolved organic carbon. The turnover times of DIP and DIN by HB are regulated by the concentrations
of the nutrients and the numbers of HB, which show significant spatiotemporal variability in Jiaozhou Bay. HB may aggravate
the P-limitation of phytoplankton by competing for phosphorus in summer in Jiaozhou Bay. HB play an important role in the
biogeochemical cycling of nutrients and may increase the N:P ratio and the accumulation of DIN, thereby accelerating the imbalance
of the N:P ratio in Jiaozhou Bay. |
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| Keywords: | Heterotrophic bacterioplankton Dissolved inorganic phosphorus Uptake rate Jiaozhou Bay |
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