CAJ | 학술논문

采用室内水体直接暴露和微宇宙模拟暴露，研究了重金属镉（Cd2+）对中国圆田螺（Cipangopaludina Chinensis）的毒性效应及其在田螺软、硬组织中的蓄积规律。结果表明，中国圆田螺的5 d水体直接暴露半致死浓度（LC50）为6.15 mg·L-1；壳长增长率可以作为Cd2+慢性污染胁迫的有效生物标志，浓度为0.15 mg·kg-1的Cd2+刺激田螺壳增长，而浓度为1.5 mg·kg-1的Cd2+抑制田螺壳增长。中国圆田螺的壳与软组织均能够蓄积镉，并且随着暴露时间和暴露浓度的增大，重金属Cd2+的蓄积量也增大，相比之下田螺壳的蓄积更为稳定；天津中心城区主要景观水体中国圆田螺镉污染现状调查也得到了同样的结果。这表明，中国圆田螺的壳可以作为淡水环境镉污染的生物监测的有效补充。
채용실내수체직접폭로화미우주모의폭로，연구료중금속력（Cd2+）대중국원전라（Cipangopaludina Chinensis）적독성효응급기재전라연、경조직중적축적규률。결과표명，중국원전라적5 d수체직접폭로반치사농도（LC50）위6.15 mg·L-1；각장증장솔가이작위Cd2+만성오염협박적유효생물표지，농도위0.15 mg·kg-1적Cd2+자격전라각증장，이농도위1.5 mg·kg-1적Cd2+억제전라각증장。중국원전라적각여연조직균능구축적력，병차수착폭로시간화폭로농도적증대，중금속Cd2+적축적량야증대，상비지하전라각적축적경위은정；천진중심성구주요경관수체중국원전라력오염현상조사야득도료동양적결과。저표명，중국원전라적각가이작위담수배경력오염적생물감측적유효보충。
Sensitive organisms can be used as an indicator of environmental pollution. An indoor experiment was conducted to study the tox-ic effects of heavy metal cadmium(Cd2+)on river snail Cipangopaludina Chinensis and its accumulation in soft and hard tissues of the snails using direct exposure and microcosm exposure. The 5 d half lethal concentration(LC50)of cadmium to river snail was 6.15 mg·L-1 under direct exposure. The growth rate of snail shell length could be considered as an effective biomarker of chronic Cd stress. Cadmium stimulated snail shell growth at 0.15 mg·kg-1, but inhibited it at 1.5 mg·kg-1. Cadmium could be accumulated in snail shell as well as in the soft tissue. The accumulation of Cd in soft and hard tissues increased with increased exposure time and concentrations. Moreover, Cd accu-mulation was more stable in the shell than in the soft tissue. The similar results were found in an insitu investigation of heavy metal pollution in the major landscape rivers in Tianjin. In conclusion, Cipangopaludina Chinensis shell could be an effective supplementary in biological monitoring of Cd pollution in freshwater environment.