要闻回顾

河南2019年耕地质量等别年度更新评价数据成果通过核查近日,河南158个县(市、区)2019年耕地质量等别年度更新评价数据成果率先通过国家质检核查。根据自然资源部相关要求,河南省自然资源系统积极谋划、主动作为,汇集市县相关部门力量,对全省耕地质量变化更新情况进行年度调查评价。全省数据成果在省、市级质检核查合格基础上,以100%的准确率通过自然资源部委派的中国农业大学相关专家的核查。据悉,该成果将为国土空间规划、耕地占补平衡、国土空间生态修复、自然资源管理等工作提供有力的基础数据支撑。     

Manila clam Venerupis philippinarum as a biomonitor to metal pollution

The Manila clam Venerupis philippinarum is a good biomonitor/bioindicator to marine metal pollution and is frequently used in aquatic toxicology. Two dominant pedigrees (white and zebra) of clam are distributed in the Bohai Sea; however, little attention has been paid to potential biological differences between these two pedigrees. In this study, we tested the sensitivity of both pedigrees to marine metal (cadmium and zinc) pollution biomonitoring and marine environmental toxicology. Results demonstrate significant biological differences in gills of white and zebra clams based on metabolic profiles and antioxidant enzyme activities. In addition, we found that hypotaurine, malonate and homarine were relatively high in white clam gills, while alanine, arginine, glutamate, succinate, 4-aminobutyrate, taurine and betaine were high in zebra clam gills. Zebra clam gills were also more sensitive to a mixture of Cd and Zn, as shown by antioxidant enzyme activities and metabolic profiles, but white clam gills could accumulate more Zn. Therefore, we suggest that the white pedigree can be used as a biomonitor to marine Zn pollution, whereas the zebra pedigree can be used for toxicology studies on Cd and Zn mixed pollution.