Succession of causative species during spring blooms in the East China Sea: coupled biophysical numerical modeling

SUN Ke; QIU Zhongfeng; HE Yijun; FAN Wei; WEI Zexun

doi:10.1007/s13131-016-0964-0

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Article Navigation > Acta Oceanologica Sinica > 2016 > 35(12): 1-11

SUN Ke, QIU Zhongfeng, HE Yijun, FAN Wei, WEI Zexun. Succession of causative species during spring blooms in the East China Sea: coupled biophysical numerical modeling[J]. Acta Oceanologica Sinica, 2016, 35(12): 1-11. doi: 10.1007/s13131-016-0964-0

Citation:

SUN Ke, QIU Zhongfeng, HE Yijun, FAN Wei, WEI Zexun. Succession of causative species during spring blooms in the East China Sea: coupled biophysical numerical modeling[J]. Acta Oceanologica Sinica, 2016, 35(12): 1-11. doi: 10.1007/s13131-016-0964-0

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Succession of causative species during spring blooms in the East China Sea: coupled biophysical numerical modeling

doi: 10.1007/s13131-016-0964-0

1.
The First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China;Laboratory for Regional Oceanography and Numerical Modeling, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266071, China
2.
School of Marine Sciences, Nanjing University of Information Science and Technology, Nanjing 210044, China
3.
Ocean College, Zhejiang University, Hangzhou 310058, China

Received Date: 2015-12-23
Rev Recd Date: 2016-02-17

Abstract

Abstract

In the East China Sea (ECS), the succession of causative species responsible for blooms is a recurrent phenomenon during the spring, which changes from diatoms to dinoflagellates. Observations from space and in situ cruises captured this pattern of succession during spring of 2005. In this study, we coupled two biological models, which were developed previously for Skeletonema costatum and Prorocentrum donghaiense, into a circulation model tailored for the ECS. The coupled biophysical model was used to hindcast the blooms and to test the hypothesis proposed in earlier studies that phosphate (PO₄^3-) is the first-order decider of the succession. The coupled model successfully reproduced the hydrodynamics (as described in a companion paper by Sun et al.^①, the spatiotemporal distribution of the chlorophyll a (Chl a) concentration, and the species succession reasonably well. By analyzing the effects of different factors on the surface Chl a distribution, we confirmed that the offshore boundaries of the blooms were confined by PO₄^3-. In addition, we suggest that surface wind fields may modulate the horizontal distribution of blooms. Thus, during the dispersal of blooms, surface winds coupled with PO₄^3- may control the succession of blooms in the ECS. The proposed coupled model provides a benchmark to facilitate future improvements by including more size classes for organisms, multiple nutrient schemes, and additional processes.
- Skeletonema costatum,
- Prorocentrum donghaiense,
- species succession,
- biophysical model,
- East China Sea

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