| |
| |
|
|
|
|
| |
 |
Harmful algal blooms: mechanisms, monitoring, and prevention in a rapidly changing world
|
| |
|
|
Are changes in N:P ratios in coastal waters the key to harmful algal species occurence?
P-B1-16-S
Anqiang Yang* , State Key Laboratory of Estuarine and Coastal Research, East China Normal University
Richard bellerby, 1.State Key Laboratory of Estuarine and Coastal Research, East China Normal University
2. Norwegian Institute for Water Research, Bergen N-5006, Norway
Quanxing Liu, State Key Laboratory of Estuarine and Coastal Research, East China Normal University
Xiaoshuang Li, State Key Laboratory of Estuarine and Coastal Research, East China Normal University
Jing Li, State Key Laboratory of Estuarine and Coastal Research, East China Normal University
Presenter Email: 51173904027@stu.ecnu.edu.cn |
| There is a growing amount of evidence for an increase in nutrient concentrations in coastal waters from anthropogenic sources. Meanwhile, the frequency, diversity and intensity of harmful algal blooms (HABs) are increasing. Although there are many factors that control the growth and persistence of HABs, recent studies suggested the nutrient ratios (such as N:P and Si:P) are important regulators. However, it is still not possible to conclude the extent to which the N:P ratios in coastal waters can be attributed to the change in HABs species. In May 2017, we surveyed the East China Sea and identified that the dinoflagellate (Proprocentrum donghaiense) was blooming (3-21 *105cells L-1) in higher N:P ratios waters, while diatom (Skeletonema costatum) was dominant (1-6 *106 cells L-1) in lower N:P ratios waters. This result supports, to some extent, that change HABs species coincide with high N:P ratios. We discuss this finding and how other environment factors, such as light, temperatures or CO2 may also play an important role. This field study is guiding new perturbation studies on the competition between diatoms and dinoflagellates under changing multiple ecosystem drivers. |
|
|
|
|
|
|
|
|