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Title: | Development of Phaeocystis globosa blooms in the upwelling waters of the South Central coast of Viet Nam |
Authors: | Doan, Nhu Hai Nguyen, Ngoc Lam Dippner, Joachim W. |
Keywords: | Viet Nam Coastal upwelling Lagrangian HAB model Phaeocystis globosa Bloom |
Issue Date: | 2010 |
Series/Report no.: | Journal of Marine Systems, Volume 83, Issues 3–4, November 2010, Pages 253–261;[http://www.sciencedirect.com/science/article/pii/S092479631000093X] [http://dx.doi.org/10.1016/j.jmarsys.2010.04.015] |
Abstract: | Blooms of haptophyte algae in the south central coastal waters of Viet Nam often occur in association with upwelling phenomenon during the southwest (SW) monsoon. Depending on the magnitude of the blooms, damage to aquaculture farms may occur. Based on two years of data on biology, oceanography, and marine chemistry, the present study suggests a conceptual model of the growth of the haptophyte Phaeocystis globosa. At the beginning of the bloom, low temperature and abundant nutrient supply, especially nitrate from rain and upwelling, favour bloom development. Diatoms utilize available nitrate and phosphate; subsequently, higher ammonium concentration allows P. globosa to grow faster than the diatoms. At the end of the Phaeocystis bloom, free cells may become available as food for a heterotrophic dinoflagellate species, Noctiluca scintillans. During and after the phytoplankton bloom, remineralization by bacteria reduces dissolved oxygen to a very low concentration at depth, and favors growth of nitrate-reducing bacteria.A Lagrangian Harmful Algal Bloom (HAB) model, driven by a circulation model of the area, realistically simulates the transport of microalgae in surface waters during strong and weak SW monsoon periods, suggesting that it may be a good tool for early warning of HABs in Vietnamese coastal waters. |
URI: | http://113.160.249.209:8080/xmlui/handle/123456789/19610 |
Appears in Collections: | Công bố khoa học ở tạp chí quốc tế - International research papers (Bibliographic record and/or full-text)
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