The Assessment of Potential Eutrophication in Guangzhou Sea Area
HUANG Yun-feng1,2, BAI Jie1, FENG Jia-he2, JIANG Sheng2,3, LI Lan1,2, WEI Peng2,4
1. Ocean University of China, Qingdao, 266003; 2. Guangzhou Monitoring Center of Marine Resources and Environment, Guangzhou, 510235; 3. Jinan University, Guangzhou, 510630; 4. South China Sea Institute of Oceanology, Guangzhou, 510301 China
In this paper, based the monitoring data from May to December of 2003 in Guangzhou sea area, eutrophication in this area was assessed with a model refering to nutrient-limited characters,.Results showed that there was of a high nutrients concentration in Guangzhou sea area.The concentrations of DIN were higher than Sea water quality standard VI(GB 3097-1997).The concentrations of phosphate were between the Sea water quality standard of III and VI (GB 3097-1997) in spring and summer, while were higher than Sea water quality standard VI during rest of the year.Most of this area was at the stage of phosphorus-limited potential eutrophication or slightly-phosphorus-limited potential eutrophication.The concentrations of phosphate and DIN were increased annually in recent 20 years in Guangzhou sea area.
[22] Justic D.1991.A simple oxygen index for trophic state description[J].Mar Pollut Bull,2(2):41-55
[23] Ignatiades L,Karydis M,Vounatsou P.1992.A Possible method for evaluating oligotrophy and eutrophication baded on nutrient concentration scales[J].Mar Po llut Bull,24(5):238-243
