| MA Zengling,LIN Hongping,GU Xiaolian,XU Zhaoli. 2011. Effects of residual chlorine on the mortality, grazing and respiration of Labidocera euchaeta (Copepoda). Acta Oceanologica Sinica, (2):96－102 |
| Effects of residual chlorine on the mortality, grazing and respiration of Labidocera euchaeta (Copepoda) |
| Effects of residual chlorine on the mortality, grazing and respiration of Labidocera euchaeta (Copepoda) |
| Received:May 04, 2010 Revised:November 02, 2010 |
| DOI：10.1007/s13131-011-0109-4 |
| Key words:copepod grazing Labidocera euchaeta residual chlorine respiration zooplankton |
| 中文关键词: copepod grazing Labidocera euchaeta residual chlorine respiration zooplankton |
| 基金项目:The National Maritime Bureau's special fund for scientific research on public causes under contract No. 200905010-12; special research fund for the national non-profit institutes under contract No. 2008M15. |
| Author Name | Affiliation | E-mail | | MA Zengling | Key and Open Laboratory of Marine and Estuary Fisheries(Ministry of Agriculture), East China Sea Fisheries Research Institute, Chinese Academy of Fisheries Science, Shanghai 200090, China | mazengling@163.com | | LIN Hongping | Institute of Life Science and Technology, Zhanjiang Normal University, Zhanjiang 524048, China | | | GU Xiaolian | Key and Open Laboratory of Marine and Estuary Fisheries(Ministry of Agriculture), East China Sea Fisheries Research Institute, Chinese Academy of Fisheries Science, Shanghai 200090, China | | | XU Zhaoli | Key and Open Laboratory of Marine and Estuary Fisheries(Ministry of Agriculture), East China Sea Fisheries Research Institute, Chinese Academy of Fisheries Science, Shanghai 200090, China | |
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| Abstract: |
| In this study, the authors investigated the effects of residual chlorine on mortality, grazing and respiration of Labidocera euchaeta in laboratory. The grazing rate was evaluated by subtraction method of food concentration and respiration rate was measured using oxygen electrode. It was found that the lethal effect of residual chlorine on L. euchaeta increased with enhanced concentration and prolonged duration. The medium lethal concentration (LC50) of chlorine for L. euchaeta in 24 h was about 0.58 mg/L and the safe concentration was about 0.21 mg/L. However, the grazing and respiration of L. euchaeta decreased by 32.6% and 18.9% when exposed to 0.2 mg/L residual chlorine for 4 h. It indicated that the physiological activities of zooplankton could be suppressed by the residual chlorine less than the safety concentration. Therefore, both survival and physiological activities of the organisms living in the thermal (nuclear) power plant discharging waters should be considered when carrying out the ecological risks assessment. |
| 中文摘要: |
| In this study, the authors investigated the effects of residual chlorine on mortality, grazing and respiration of Labidocera euchaeta in laboratory. The grazing rate was evaluated by subtraction method of food concentration and respiration rate was measured using oxygen electrode. It was found that the lethal effect of residual chlorine on L. euchaeta increased with enhanced concentration and prolonged duration. The medium lethal concentration (LC50) of chlorine for L. euchaeta in 24 h was about 0.58 mg/L and the safe concentration was about 0.21 mg/L. However, the grazing and respiration of L. euchaeta decreased by 32.6% and 18.9% when exposed to 0.2 mg/L residual chlorine for 4 h. It indicated that the physiological activities of zooplankton could be suppressed by the residual chlorine less than the safety concentration. Therefore, both survival and physiological activities of the organisms living in the thermal (nuclear) power plant discharging waters should be considered when carrying out the ecological risks assessment. |
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