| 邓鑫,周祥,刘志红,李晓军,台培东.Cd2+对伸展摇蚊及黄色羽摇蚊幼虫的毒性效应研究[J].农业环境科学学报,2015,34(9):1640-1645. |
| Cd2+对伸展摇蚊及黄色羽摇蚊幼虫的毒性效应研究 |
| Toxic Effects of Cadmium on Larvae of Chironomus riparius and Chironomus flaviplumus |
| 投稿时间：2015-03-24 |
| DOI：10.11654/jaes.2015.09.002 |
| 中文关键词: 伸展摇蚊 黄色羽摇蚊 Cd2+ 毒性试验 LC50 |
| 英文关键词: Chironomus riparius Chironomus flaviplumus Cd2+ toxicity test LC50 |
| 基金项目:国家科技重大专项(2012ZX07505-001);国家自然科学基金项目(41201310) |
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| 中文摘要: |
| 依据《化学品 沉积物-水系统中摇蚊毒性试验加标于沉积物法》(GB/T 27859—2011),以死亡率、羽化率、羽化时间和口器畸形率为观测指标,分别研究了加标水体和沉积物中Cd2+(CdCl2·2.5H2O)对伸展摇蚊(Chironomus riparius)和黄色羽摇蚊(Chironomus flaviplumus)的急性(96 h)和慢性(20 d)毒性。结果表明,摇蚊幼虫存活率与水和沉积物中Cd2+浓度呈显著负相关(P<0.01),水中Cd2+对三龄伸展摇蚊幼虫和黄色羽摇蚊幼虫的96 h半致死浓度(LC50)分别为22.39 mg·L-1和33.41 mg·L-1,沉积物中Cd2+对伸展摇蚊幼虫及黄色羽摇蚊幼虫的20 d LC50分别为226.26 mg·kg-1和351.84 mg·kg-1。摇蚊幼虫口器畸形率与Cd2+浓度显著正相关(P<0.01);伸展摇蚊羽化时间与Cd2+浓度无显著相关关系,黄色羽摇蚊羽化时间与Cd2+浓度显著正相关(P<0.05)。死亡率和口器畸形率表明,伸展摇蚊对镉污染的敏感性要高于黄色羽摇蚊。 |
| 英文摘要: |
| Chironomidae are important organisms indicating the quality of water environment. Here acute(96 h) and chronic(20 d) toxicity experiments were carried out to determine the toxicity of Cd2+ on the larvae of Chironomus riparius and Chironomus flaviplumus, following the standard methods in the guideline GB/T 27859—2011(Chemicals-Sediment-water chironomid toxicity test:Spiked sediment method). The mortality, emergence rate, emergence time, and mentum deformity rate were observed. The 96 h LC50 values of cadmium to three instar C. riparius and C. flaviplumus larvae were 22.39 mg·L-1 and 33.41 mg·L-1, respectively. The 20 d LC50 values of Cd to C. riparius and C. flaviplumus were correspondingly 226.26 mg·kg-1 and 351.84 mg·kg-1. Their survival rate and mentum deformity rate were significantly positive correlated to Cd2+ concentration(P<0.01). Emergence time of C. riparius was not significantly affected by Cd2+ in the sediment, whereas that of C. flaviplumus was significantly positively correlated to Cd2+ concentration(P<0.05). However, the mortality and mentum deformity rates indicated that C. riparius was more sensitive to cadmium than C. flaviplumus. |
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