土地健康与土地资源可持续利用

土地健康是伴随可持续发展战略的实施而兴起的一个土地资源研究方向，对土地资源可持续利用的实现有着很大的实践指导意义。本文在分析土地健康内涵的基础上，论述了土地健康与土地资源可持续利用的关系，并进而针对我国土地资源的特点，提出加强土地健康研究，促进土地资源可持续利用的主要对策措施。     

没有湿地就没有水

每年的2月2日是世界湿地日,今年世界湿地日的主题为“没有湿地就没有水”。对不少人来说,尤其是非专业人士,湿地还是一个较为陌生的概念。“湿地”一词源自英文“wetland”。《湿地公约》对湿地的定义是国际公认的,即:不问其为天然或人工、长久或暂时性的沼泽地、泥炭地或水域地带、静止或流动、淡水、半咸水、咸水体,包括低潮时水深不超过6米的水域。这个广义的湿地包括海岸地带地区的珊瑚滩和海草床、滩涂、红树林、河口、河流、淡水沼泽、沼泽森林、湖泊、盐沼及盐湖。狭义的定义通常把湿地视为生态交错带,是陆地和水域之间的     

The Conservation Status and Conservation Strategy of Picea neoveitchii

Picea neoveitchii is an endemic species in China. It had been listed as an endangered species in red data books. It scatters in several locations of south slope of the Qinling Mountain of China. Upon reviewing the related literature, discussing with leading scholars on gymnosperm, ecology and plant conservation, the field survey was carried out in four locations. There are eleven mature individuals and two seedlings surviving in its natural habitats. With the survey of quadrat method in four locations, related community index were calculated such as relative important value （RIV）, species richness, similarity index, diversity index and evenness index etc. The community could be sorted and characterized as three groups based on the community parameters. The analysis of vegetation table elucidates that Picea neoveitchii is a dominant species with low grouping rate in most surveyed sites. The RAPD analysis shows target species has intraspecific genetic variability. The estimation of Shannon＇s phenotypic diversity index （Ho） also explains the difference of genetic variations of different locations. Due to the lack of enough knowledge and professional guide of conservation biological perspective, Picea neoveitchii had been clear-cut for timber production. The extent of occurrence and area of occupancy declined rapidly from 1950s to 1990s. According to the Conservation Category guideline proposed by the World Conservation Union, the conservation status of Picea neoveitchii was reevaluated as Critically Endangered （CR） B2b C2a D. Upon research in areas of ecology, molecular biology, cluster analysis of environmental parameters, a practical conservation strategy is recommended in this research.     

介入重大责任事故调查检察机关不应等邀请

监察部、最高人民检察院和国家安全生产监督管理总局近日联合印发通知,发布<关于加强行政机关与检察机关在重大责任事故调查处理中的联系和配合的暂行规定>.<暂行规定>要求,国务院或国务院授权有关部门组成的事故调查组,应当邀请最高人民检察院参加;地方各级人民政府或政府授权有关部门组成的事故调查组,应当邀请同级检察机关参加.     

车间空气中邻苯二甲酸二丁酯浓度对作业工人健康状况调查分析

长期接触加DBP作业工人，在自觉症状，临床体征及实验室检查等方面与对照组有显著性差异。提醒人们在生产作业中要引起足够重视，为国家制订车间空气中DBP容许标准提供参考依据。