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Growth and Nutrient Uptake Characteristics of Heterosigma akashiwo (Raphidophyceae) under Nitrogen and Phosphorus Concentrations in the East China Sea

1
State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai 200241, China
2
Norwegian Institute for Water Research, 5006 Bergen, Norway
*
Author to whom correspondence should be addressed.
Academic Editor: Marco Cantonati
Water 2021, 13(22), 3166; https://doi.org/10.3390/w13223166
Received: 29 September 2021 / Revised: 20 October 2021 / Accepted: 30 October 2021 / Published: 10 November 2021
(This article belongs to the Section Biodiversity and Functionality of Aquatic Ecosystems)
Heterosigma akashiwo is classified as a harmful algal bloom (HAB) species that frequently occurs in eutrophic coastal waters and results in the contamination and mortality of fish and shellfish. The growth of H. akashiwo in four phosphate and nitrate concentration scenarios, representing the observed nutrient concentration ranges in the East China Sea (ECS), was evaluated to further understand the effect of nutrient concentrations on H. akashiwo blooms. The specific growth rate in the exponential growth phase (µ′) and the maximum cell density were lower (17–21% and 41%, respectively) under low phosphorus concentration scenarios, compared to the rates observed under high phosphorus concentration scenarios. The cellular nitrogen-to-phosphorus ratios of H. akashiwo were influenced by the initially supplied N:P ratio and the allocation strategy employed. Phosphorus concentration had a greater influence on the total growth of H. akashiwo than nitrate did, within the natural nutrient conditions of the ECS. These results could serve as a reference for coastal water management and marine ecological management and may be useful for further studies on the simulation and prediction of H. akashiwo blooms, particularly in the ECS. View Full-Text
Keywords: Heterosigma akashiwo; HABs; growth rate; phytoplankton; nutrients Heterosigma akashiwo; HABs; growth rate; phytoplankton; nutrients
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MDPI and ACS Style

Yang, A.; Bellerby, R.G.J.; Wang, Y.; Li, X. Growth and Nutrient Uptake Characteristics of Heterosigma akashiwo (Raphidophyceae) under Nitrogen and Phosphorus Concentrations in the East China Sea. Water 2021, 13, 3166. https://doi.org/10.3390/w13223166

AMA Style

Yang A, Bellerby RGJ, Wang Y, Li X. Growth and Nutrient Uptake Characteristics of Heterosigma akashiwo (Raphidophyceae) under Nitrogen and Phosphorus Concentrations in the East China Sea. Water. 2021; 13(22):3166. https://doi.org/10.3390/w13223166

Chicago/Turabian Style

Yang, Anqiang, Richard G.J. Bellerby, Yanna Wang, and Xiaoshuang Li. 2021. "Growth and Nutrient Uptake Characteristics of Heterosigma akashiwo (Raphidophyceae) under Nitrogen and Phosphorus Concentrations in the East China Sea" Water 13, no. 22: 3166. https://doi.org/10.3390/w13223166

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