Abstract：Surface sediment and overlying water from Lake Chaohu were sampled before (in April) and after (in July) algal bloom. Total and speciation of nitrogen and phosphorus in the sediments were analyzed, and their relationship with algal bloom was discussed. Algal bloom could increase the concentrations of nitrogen and decrease the concentrations of phosphorus from surface sediments, and therefore weaken the heterogenicity of sediment phosphorus concentrations. The algal bloom did not cause the obvious fluctuation of concentrations and proportion of nitrogen speciation (NH4+-N, NO3--N, Org-N), but decrease the concentrations and proportion of reactive phosphorus (LP and Fe/Al-P) rather than the proportion and content of Ca-bound P (Ca-P) in surface sediments. Meanwhile, algal boom decrease the concentrations of surface sediment bioavailable phosphorus (AAP) in whole lake. Correlation analysis indicated that the concentration of Chlorophyll-a correlated significantly with Fe/Al-bound P (Fe/Al-P) and organic phosphorus (OP) (P<0.05) but with the nitrogen forms (NH4+-N, NO3--N, Org-N) in surface sediments. These results indicated that phosphorus mainly Fe/Al-P and AAP in surface sediment played an important role in promoting algae bloom in Lake Chaohu and indicated that nitrogen and its fractions in surface sediment contributed less to the algal bloom in Lake Chaohu.
孔明, 张路, 尹洪斌, 蔡永久, 高俊峰. 蓝藻暴发对巢湖表层沉积物氮磷及形态分布的影响[J]. 中国环境科学, 2014, 34(5): 1285-1292.
KONG Ming, ZHANG Lu, YIN Hong-Bin, CAI Yong-Jiu, GAO Jun-Feng. Influence of algae bloom on distribution of total and speciation of nitrogen and phosphorus in the surface sediments from Lake Chaohu. CHINA ENVIRONMENTAL SCIENCECE, 2014, 34(5): 1285-1292.
