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《Journal of Agro-Environment Science》 2007-S2
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Water Quality in Guangzhou Nansha Wetland Park and Impacts by Simulated Acid Rain

LI Jing1,LIN Chu-xia1,2,WU Yong-gui1,LU Wen-zhou1 (1.College of Resources and Environment,South China Agricultural University,Guangzhou 510642,China;2.School of Environmental Science and Management,Southern Cross University,Lismore,NSW 2480,Australia)  
Field and laboratory investigations were carried out to evaluate existing water quality in the Guangzhou Nansha Wetland Park.Simulation experiment was also conducted to assess impacts of synthetic acid rain on quality of water samples collected from the study site.The results showed that currently major water quality parameters are in accordance with the permit limits laid out by National Standards.Additional eco-toxicological test results suggested that the water be little either acutely or chronically toxic to the tested organism,Daphnia carinata.However,water samples affected by synthetic acid rain showed strongly acute toxicity to Daphnia carinata when the mixing ratio of synthetic acid rain to wetland water reach a value of density.It suggests that long-term impacts of acid precipitation degrade the water quality in the study site and possibly impede the development of a healthy wetland ecosystem in the Nansha Wetland Park.
【Key Words】： wetland aquatic ecosystem ecotoxicity Daphnia carinata synthetic acid rain
【Fund】： 广东省科技厅自然基金项目《珠江三角洲万倾沙围垦区次生湿地生态系统的优化途径前期研究》(B50201016)
【CateGory Index】： X824
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