试述《野生动物保护法》的修改

《野生动物保护法》施行三十余年,对于促进野生动物保护起着至关重要的作用.然而,在新冠肺炎疫情的冲击下,其中的部分内容显露出不足,全国人大常委会出台的《决定》可以应一时之急,但最根本的办法是对《野生动物保护法》进行修改.通过对现行法律的考察,检视《野生动物保护法》在立法理念、监管职能以及法律责任等方面存在的问题,并提出相...     

Laboratory culture of the freshwater benthic gastropod Bellamya aeruginosa （Reeve） and its utility as a test species for sediment toxicity

This study aimed to develop original laboratory culture and sediment toxicity testing protocols for the freshwater gastropod Bellamya aeruginosa(Reeve),a new potential species for sediment toxicity testing.B.aeruginosa was successfully cultured with an effective culture system under proposed laboratory conditions.Optimal ad libitum feeding levels for larvae,juveniles,and adults were 2.0,6.0,and 16.0 mg fish food/(snail·day),respectively.Mean survival rates of juveniles were higher than 90%.The snails could be sexed at 9 weeks of age,and their generation time is approximately 4 months.Reproduction continued all year around;the mean fecundity was 0.55 newborn/(female·day).The utility of this species for bioassays was evaluated in both 10-day and 28-day case studies with artificial sediments.The 10-day LC50 of Cu for larvae was 480 μg/g dry weight(dw),and the lowest observed effects concentration of Cu for survival and growth of larvae was 195 μg/g dw.Survival and growth are reliable indicators of acute toxicity.Larvae accumulated more Cu than adults.B.aeruginosa exhibited a higher sensitivity to Cu exposure than standard test species(Hyalella azteca and Chironomus tentans).The 28-day test of sediment toxicity with adults showed that fecundity was a robust endpoint indicator of reproductive toxicity,and the biochemical endpoints of superoxide dismutase,catalase,and glutathione could be used as sensitive biomarkers for Cu-induced oxidative damage.B.aeruginosa can be therefore recommended as a candidate for the standardization of the freshwater sediment toxicity test protocol.     

《长江保护法》:用法律武器保护长江母亲河

千百年来,长江水滚滚东流,滋养了一代又一代的中华儿女。长江作为我们的母亲河,是中华民族永续发展的重要支撑。但随着经济社会的不断发展,长江流域生态环境问题也日益突出。习近平总书记两次视察长江经济带时指出,“‘长江病了’,而且病得还不轻”,要求“把修复长江生态环境摆在压倒性位置,共抓大保护、不搞大开发”。2020年12月26日,十三届全国人大常委会第二十四次会议表决通过了《长江保护法》,并于2021年3月1日起施行。《长江保护法》的制定开启了对重要流域进行单独立法的先河,长江保护进入了有法可依的新阶段。