School of Life Science, East China Normal University, Shanghai 200062, China.
J Environ Sci (China). 2009;21(11):1575-80. doi: 10.1016/s1001-0742(08)62458-4.
This study evaluated the median lethal concentration (LC50) and safe concentration of water-borne ammonia, phosphate and pH value on Physocypria kraepelini, a freshwater Ostracoda with a static renewal test system. The results indicated that the LC50 values of ammonia for P kraepelini were 1026.71, 859.98, 771.79 and 583.82 mg/L at 24, 48, 72 and 96 h exposure, respectively, and the safe concentration range of ammonia for the long-term survival of P. kraepelini was less than 58.38 mg/L. The safe range of pH value for the survival of P. kraepelini was from 6.59 to 7.61. P. kraepelini has a high tolerance to ammonia, phosphate and pH value which are the main environmental factors in the serious eutrophication water.
本研究采用静态换水式试验系统，评估了水生氨氮、磷和 pH 值对淡水介形虫 Physocypria kraepelini 的半致死浓度（LC50）和安全浓度。结果表明，P. kraepelini 在 24、48、72 和 96 h 暴露时，氨氮的 LC50 值分别为 1026.71、859.98、771.79 和 583.82 mg/L，氨氮对 P. kraepelini 长期生存的安全浓度范围小于 58.38 mg/L。P. kraepelini 生存的 pH 值安全范围为 6.59 至 7.61。P. kraepelini 对严重富营养化水中的主要环境因子氨氮、磷和 pH 值具有较高的耐受性。
