Variation of photosynthetic activity during the process of green tides induced by nutrient additions in the coastal sea of Qingdao, China

4th International Conference on Water Resource and Environment

地球科学;生态环境科学

Wang, Z.Y.^1 ; Lv, H.M.^1 ; Wang, W.^2 ; Zhang, Y.Y.^1 ; Feng, X.D.^1 ; Zhang, Y.M.^1 ; Cao, L.^1 ; Gao, Y.^1 ; Liu, Y.^1

Institute of Oceanographic Instrumentation, Qilu University of Technology, Shandong Provincial Key Laboratory of Ocean Environmental Monitoring Technology, Qingdao

266061, China^1

North China Sea Environment Monitoring Center, State Oceanic Administration, Qingdao

266033, China^2

关键词: Coastal waters;    Green tides;    Nutrient addition;    Photosynthetic activity;    Qingdao;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/191/1/012124/pdf
DOI  :  10.1088/1755-1315/191/1/012124

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Three nutrient addition experiments were conducted to induce green tides of Ulva prolifera from April to August in 2016 in the coastal waters of Qingdao, China. Photosynthetic activity (Fv/Fm), biomass, nutrients and temperature were measured.We found that Fv/Fm of U. prolifera increased to the maximum about 0.7 ∼ 0.75 under favorable environment, and declined significantly when the growth of U. prolifera was limited by nutrient and temperature. In Addition, the results showed that Fv/Fm increased to the maximum prior to occurrence of green tide and fell significantly before green tide dissipated. Fv/Fm can be used to predict the outbreak and dissipation of green tides.