Seasonal changes of nutrient concentrations and phytoplankton biomass in a shallow agricultural pond
Pond is an ideal study target which can be regarded as an enclosed ecosystem with little external disturbance such as pollution discharge. The aim of the study is to obtain further understandings of freshwater eutrophication mechanism through a one-years intensive observation and monitoring program for a shallow pond in Chongming Island, China. The result showed that NO3-N, PO4-P and DTP kept in low levels in the pond all through the year with no distinct seasonal variation trends; TN and TP increased with the growth of phytoplankton and the main components of TP was particulate phosphorus. Algae blooms occurred from June to late November and Chl-a concentration peaked from late August to early September. The study also reveals that low TN:TP ratio in the shallow pond is the result of sudden growth and blooming of phytoplankton, not the cause.
pond nutrients phytoplankton biomass TN TP ratio
LI Feipeng ZHU Yiping ZHANG Haiping CHEN Ling
State Key Laboratory of Pollution Control and Resource Reuse College of Environmental Science and Engineering,Tongji University Shanghai,200092,P.R.China
国际会议
北京
英文
1-4
2009-06-11（万方平台首次上网日期，不代表论文的发表时间）