Zargar S, Ghosh T K
Environmental Biotechnology Division, National Environmental Engineering Institute, Nehru Marg, Nagpur, 440 020, MS, India.
Arch Environ Contam Toxicol. 2007 Aug;53(2):191-7. doi: 10.1007/s00244-006-0108-1. Epub 2007 Jun 2.
Impact of select levels of temperature, individually and in combination, with different initial chlorine concentrations on the growth and reproduction of phytoplankter Chlorella vulgaris and zooplankton C. reticulata, C. viridis, and Diaptomus forbesi was evaluated. During the experiment, optimum growth temperature for the alga was estimated as 26 degrees C, even though alga showed considerable growth up to 36 degrees C. However, initial chlorine at concentrations >or=0.25 mg l(-1) adversely affected growth (P < 0.05 to 0.001) at all select temperature levels (26 degrees C, 31 degrees C, 33 degrees C, 36 degrees C, 39 degrees C, 42 degrees C, and 45 degrees C). Investigations toward effects of different temperatures (26 degrees C, 31 degrees C, 33 degrees C, and 36 degrees C) on zooplankton indicated that survivability of these organisms was affected at temperatures >or=33 degrees C. However, the percent growth rates of zooplankters at 26 degrees C were significantly higher (P < 0.05) than those at 31 degrees C, 33 degrees C, and 36 degrees C. Initial chlorine levels of 0.5 and 0.25 mg l(-1) were lethal to zooplankton; however, zooplankton survival was not affected at 0.06 mg l(-1) chlorinated water at all selected temperatures.
评估了不同初始氯浓度下，单个温度水平以及不同温度组合对浮游植物小球藻和浮游动物网纹溞、绿色裸腹溞及福布斯镖水蚤生长和繁殖的影响。实验期间，藻类的最佳生长温度估计为26摄氏度，尽管藻类在高达36摄氏度时仍有可观的生长。然而，在所有选定温度水平（26摄氏度、31摄氏度、33摄氏度、36摄氏度、39摄氏度、42摄氏度和45摄氏度）下，初始氯浓度≥0.25 mg l(-1) 均对生长产生不利影响（P < 0.05至0.001）。对不同温度（26摄氏度、31摄氏度、33摄氏度和36摄氏度）对浮游动物影响的研究表明，这些生物在温度≥33摄氏度时生存能力受到影响。然而，26摄氏度时浮游动物的生长率百分比显著高于31摄氏度、33摄氏度和36摄氏度时（P < 0.05）。初始氯浓度为0.5和0.25 mg l(-1) 对浮游动物具有致死性；然而，在所有选定温度下，0.06 mg l(-1) 的氯化水中浮游动物的生存未受影响。
