East China Sea increasingly gains limiting nutrient P from South China Sea

Ting Hsuan Huang, Chen Tung Arthur Chen, Jay Lee, Chau Ron Wu, You Lin Wang, Yan Bai, Xianqiang He, Shu Lun Wang, Selvaraj Kandasamy, Jiann Yuh Lou, Ben Jei Tsuang, Hsien Wen Chen, Ruo Shan Tseng, Yiing Jang Yang

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Abstract

The Taiwan Strait (TS) directly connects two of the richest fishing grounds in the world - the East China Sea (ECS) and the South China Sea (SCS). Carbon and nutrient supplies are essential for primary production and the Yangtze River is an important source for the ECS. However the ECS is severely P-limited. The TS transports an order of magnitude more carbon and a factor of two more phosphate (P) to the ECS than the Yangtze River does. To evaluate the temporal variability of these supplies, the total alkalinity (TA), dissolved inorganic carbon (DIC), nitrate plus nitrite (N), P, and silicate (Si) fluxes through the TS were estimated using empirical equations for these parameters and the current velocity, which was estimated using the Hybrid Coordinate Ocean Model (HYCOM). These empirical equations were derived from in situ salinity and temperature and measured chemical concentrations that were collected during 57 cruises (1995–2014) with a total of 2096 bottle samples. The 24-month moving averages of water, carbon, and nutrient fluxes significantly increase with time, so does the satellite chlorophyll a concentration. More importantly, the increased supply of the badly needed P from the TS is more than that from the Yangtze River.

Original languageEnglish
Article number5648
JournalScientific Reports
Volume9
Issue number1
DOIs
Publication statusPublished - 2019 Dec 1

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Huang, T. H., Chen, C. T. A., Lee, J., Wu, C. R., Wang, Y. L., Bai, Y., He, X., Wang, S. L., Kandasamy, S., Lou, J. Y., Tsuang, B. J., Chen, H. W., Tseng, R. S., & Yang, Y. J. (2019). East China Sea increasingly gains limiting nutrient P from South China Sea. Scientific Reports, 9(1), [5648]. https://doi.org/10.1038/s41598-019-42020-4