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Yanping Zhong, Peixuan Wang, Jinxin Chen, Xin Liu, Edward A. Laws, Bangqin Huang. Dynamic of phytoplankton community during varying intensities of the northeast monsoon in the Taiwan Strait[J]. Acta Oceanologica Sinica. doi: 10.1007/s13131-024-2381-0
Citation: Yanping Zhong, Peixuan Wang, Jinxin Chen, Xin Liu, Edward A. Laws, Bangqin Huang. Dynamic of phytoplankton community during varying intensities of the northeast monsoon in the Taiwan Strait[J]. Acta Oceanologica Sinica. doi: 10.1007/s13131-024-2381-0

Dynamic of phytoplankton community during varying intensities of the northeast monsoon in the Taiwan Strait

doi: 10.1007/s13131-024-2381-0
Funds:  This work is supported by the National Natural Science Foundation of China under contract Nos 42122044, 42206100, and 42141002; Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai) under contract No. SML2021SP308.
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  • Corresponding author: liuxin1983@xmu.edu.cn
  • Received Date: 2024-03-15
  • Accepted Date: 2024-05-07
  • Available Online: 2024-08-23
  • The characteristics of the terrain of a strait can lead to a “fine tube” effect that enhances a monsoon and thereby affects the physical, chemical, and biological processes of marine ecosystems. This effect is a highly dynamic and complex phenomenon involving interactions among atmospheric, oceanic, and terrestrial systems, as well as biogeochemical cycles and biological responses driven by it. However, current understanding has been focused mainly on the differences between monsoons, and there have been few studies concerned with the weakening or strengthening of monsoons. To explore the biogeochemical and phytoplankton responses during varying intensities of the northeast (NE) monsoon in the Taiwan Strait (TWS), high-resolution, across-front observations combined with FerryBox online data and satellite observations were conducted in this study during a strong, moderate, and weak NE monsoon. The spatiotemporal changes of nutrient concentrations and phytoplankton communities were regulated by the dynamics of ocean currents forced by NE winds. The weakening of the NE monsoon caused shrinkage of the coastal currents that led to a reduction of nutrient concentrations and an alteration of the distribution patterns of phytoplankton communities along cross-front sections. Specifically, there was a notable decrease in the proportions of dinoflagellates and cryptophytes in inshore regions and of prasinophytes in offshore areas. This study showed for the first time the dynamics of phytoplankton with changes of ocean currents during varying intensities of the NE monsoon in a strait system. The findings helped to elucidate the general spatial patterns of the phytoplankton community based on satellite-derived surface temperature and wind patterns and further enhanced the understanding of biogeochemical cycles in marine systems.
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