The effects of spring-neap tide on the phytoplankton community development in the Jiaozhou Bay, China |
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| Authors: | LIU Dongyan SUN Jun LIU Zhe CHEN Hongtao WEI Hao ZHANG Jing |
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| Affiliation: | Marine Ecosystem Dynamic Laboratory, Ocean University of China, Qingdao 266003, China;Key Laboratory of Marine Ecology & Environmental Science, Institute of Oceanology, Chinese Academy ofSciences, Qingdao 266071, China;Institute of Physical Oceanography, Ocean University of China, Qingdao 266003, China;College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266003, China;Institute of Physical Oceanography, Ocean University of China, Qingdao 266003, China;College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266003, China;State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai 200062, China |
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| Abstract: | ![]()
The development of the phytoplankton community was studied in the Jiaozhou Bay during the spring to neap tide in August2001, through three cruises and a 15 d continuous observation. This investigation indicates that diatom cell abundance increasedsharply following the end of a spring tide, from 9 cells/cm3 to a peak of 94 cells/cm3. The dominant species composition andabundance show a quick species sequence from spring to neap tide, and the dominant species at the start phase is Skeletomenacostatum, then changes to Chaetoceros curvisetus, finally it changes to Eucampia zodiacus. Silicate concentration increasesduring spring tide, as a result of nutrient replenishment from the watersediment interface, its initial average concentration inneap tide is 1.39 mmol/dm3 and reached the peak average concentration of 8.40 mmol/dm3 in spring tide. But the nitrogenconcentration dropped due to dilution by the low nitrogen seawater from the Huanghai Sea, its initial average concentration inneap tide is 67 mmol/dm3 and decreased to the average concentration of 54 mmol/dm3 in spring tide. The degree of siliconlimitation was decreased and phytoplankton, especially diatoms, responds immediately after nutrient replenishment in thewater column. Skeletonmea costatum, as one of the dominant species in the Jiaozhou Bay, shows a quicker response tonutrient availability than Eucampia zodiacus and Chaetoceros curvisetus. It is proposed that dominant species compositionand water column stability synchronously determine the development of phytoplankton summer blooms in the Jiaozhou bay. |
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| Keywords: | phytoplankton hydrodynamics nutrients spring to neap tide Jiaozhou Bay coastal waters |
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