Due to the influence of environmental pollution, phytoplanktonblooms often arise in many lakes and reservoirs in China (during) spring through autumn.
在春至秋季，由于环境污染的影响，我国许多湖泊和水库中经常发生水华现象。
2
Phytoplankton require nutrients to reproduce, and phytoplanktonblooms are often tied to events that bring nutrients to the ocean surface, such as dust plumes.
浮游植物需要养分进行繁殖，而藻华的出现往往与给洋面带来营养物质的事件相联系，譬如灰尘羽流。
3
Dr Pollard and his colleagues found, as geo-engineers would hope, that phytoplanktonblooms in the waters north of the islands were bigger and longer-lived than those to the south.