Density dependent interactions among Hydrilla Verticillata and different concentrations of phytoplankton
Density dependent interactions among submerged macrophyte (Hydrilla Verticillata) and different concentrations of phytoplankton were studied in an enclosure experiment. The result shows that when the initial phytoplankton density was low, the submerged macrophyte (Hydrilla Verticillata) would control the cell density of the system, and keep the system with a high biodiversity value, by the meantime the nutrition level would be decreased, while when the initial phytoplankton density was high, the submerged macrophyte (Hydrilla Verticillata) could not control the cell density effectively, and the microalgae would take place of other species of algae to become the dominative species of the system. The experiment result also shows that when the initial phytoplankton density was low, the macrophyte (Hydrilla Verticillata) would develop very well, and the macrophyte biomass would increase about 25%, and when the initial phytoplankton density was high, the macrophyte biomass would decrease nearly 40%. So the density of the phytoplankton was the key factor to decide the alternative state.
JIANG Hao ZHAO Hui GUAN Baohua ZHOU Changfang AN Shuqing
School of Life Science, Nanjing University, 22 Hankou Road, Nanjing 210093, P.R.China Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, East Beijing Road 73, Nan
国际会议
武汉
英文
74
2011-04-05（万方平台首次上网日期，不代表论文的发表时间）