Growth and Nutrient Uptake Characteristics of <i>Heterosigma akashiwo</i> (Raphidophyceae) under Nitrogen and Phosphorus Concentrations in the East China Sea
<i>Heterosigma akashiwo</i> 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 <i>H. akashiwo</i> in four phosphate and nitrate concentrati...
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| Autores principales: | , , , |
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| Formato: | article |
| Lenguaje: | EN |
| Publicado: |
MDPI AG
2021
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| Materias: | |
| Acceso en línea: | https://doaj.org/article/e9f73f8955f04e10b50e570567741696 |
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| Sumario: | <i>Heterosigma akashiwo</i> 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 <i>H. akashiwo</i> 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 <i>H. akashiwo</i> 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 <i>H. akashiwo</i> 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 <i>H. akashiwo</i> 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 <i>H. akashiwo</i> blooms, particularly in the ECS. |
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