Resolving the complex relationship between harmful algal blooms and environmental factors in the coastal waters adjacent to the Changjiang River estuary
Abstract The sea area adjacent to the Changjiang River estuary is the most notable region for harmful algal blooms (HABs 1 ) in China as both diatom and dinoflagellate blooms have been recorded in this region. Affected by the Changjiang diluted water (CDW 2 ) and currents from the open ocean (i.e., Taiwan warm current, TWC 3 ), the environmental conditions in the coastal waters adjacent to the Changjiang River estuary are quite complex. To obtain a better understanding of the mechanisms of HABs in this region, analyses based on field investigation data collected by the National Basic Research Priority Program (CEOHAB I 4 ) were performed using principle component analysis (PCA 5 ), multiple regression analysis (MRA 6 ) and path analysis (PA 7 ). The results suggested that phosphate and silicate are the major factors that directly affect the diatom bloom, while dissolved inorganic nitrogen (DIN 8 ), temperature and turbidity are the factors that influence the dinoflagellate bloom. CDW and the TWC have different roles in affecting the two types of algal blooms. CDW, which has a high concentration of nitrate and silicate, is essential for the diatom bloom, while the intrusion of the TWC (mainly Kuroshio subsurface water that is rich in phosphate at the bottom) is critical for the maintenance of the dinoflagellate bloom. The results of this study offer a better understanding of the mechanisms of HABs in the East China Sea. Highlights East China Sea (ECS) is a notable region for harmful algal blooms (HABs) in China. Relationship between environmental factors and HABs in ECS were analyzed. Factors affecting blooms of diatoms and dinoflagellates were identified. It's found that Changjiang diluted water is important for the diatom bloom. Taiwan warm current is more critical for the maintenance of dinoflagellate bloom.
원문복사신청을 하시면, 일부 해외 인쇄학술지의 경우 외국학술지지원센터(FRIC)에서
무료 원문복사 서비스를 제공합니다.
NDSL에서는 해당 원문을 복사서비스하고 있습니다. 위의 원문복사신청 또는 장바구니 담기를 통하여 원문복사서비스 이용이 가능합니다.
- 이 논문과 함께 출판된 논문 + 더보기