Identifying correlates of success and failure of native freshwater fish reintroductions

Reintroduction of imperiled native freshwater fish is becoming an increasingly important conservation tool amidst persistent anthropogenic pressures and new threats related to climate change. We summarized trends in native fish reintroductions in the current literature, identified predictors of reintroduction outcome, and devised recommendations for managers attempting future native fish reintroductions. We constructed random forest classifications using data from 260 published case studies of native fish reintroductions to estimate the effectiveness of variables in predicting reintroduction outcome. The outcome of each case was assigned as a success or failure on the basis of the author's perception of the outcome and on whether or not survival, spawning, or recruitment were documented during post‐reintroduction monitoring. Inadequately addressing the initial cause of decline was the best predictor of reintroduction failure. Variables associated with habitat (e.g., water quality, prey availability) were also good predictors of reintroduction outcomes, followed by variables associated with stocking (e.g., genetic diversity of stock source, duration of stocking event). Consideration of these variables by managers during the planning process may increase the likelihood for successful outcomes in future reintroduction attempts of native freshwater fish. Identificación de Correlaciones de Éxito y Fracaso de Reintroducciones de Peces de Nativos Agua Dulce     

长江中上游宜昌江段水环境保护规划研究

以宜昌市水环境保护规划研究专题为例，就长江宜昌段１９９３～２０１０年水环境保护规划进行了分析研究。首先对污染物排放量进行了预测，对长江宜昌段水环境容量进行了计算，然后划分出水环境保护功能分区和水质目标，提高综合治理水质污染符合实际的技术措施、工程措施和经济措施。     

战略环境影响评价及其在我国实施的必要性

本文简要介绍了战略环境影响评价（SEA）的产生，涵义，特点及研究现状，分析了当前我国环境影响评价存在的主要问题，重点论述了SEA在我国实施的必要性，阐明了SEA是实现可持续发展和改善我国环境评价质量的重要手段。     

The potential of remote sensing data for decision makers at the state, local and tribal level: experiences from NASA’s Synergy program

NASA’s Earth Observation System (EOS) satellite data are contributing to the development of policy relevant, remote sensing applications. To promote the use of EOS data for application development, NASA funded the Synergy program in 2000 in partnership with academia, end users, and industry. Three examples of remote sensing applications from the Synergy program are presented here and include agriculture, range management, and water resource management. These examples show that remote sensing products have the potential to be useful to a variety of decision makers and policy makers because of the opportunity to reduce chemicals in the environment, improve crop yields and better manage range lands and water resources. Transitioning from research and development to successful applications must overcome challenges such as the lack of awareness by end users of these technologies, inadequate feedback mechanism between application developers and end users, and unproven cost benefits of remote sensing data. Experience from the Synergy program indicates that these issues could be mitigated by educating and training end users, demonstrating the utility of remote sensing data in improving decision making, and establishing and maintaining a continuous dialogue between developers and end users. Sustainability of remote sensing applications ultimately depends on users continuing reliance on products and benefits from remote sensing data. The Synergy program also demonstrates that remote sensing data sets that are collected primarily for global change research contribute to the development of applications in a variety of disciplines at the regional and local level.     

ICP光谱分析环境样品光谱干扰

编制了专门用于按照国际法定计量组织文件规定作环境样品ICP光谱分析时校正光谱干扰的程序.校正程序共7套,分别用于各种光谱仪的带宽条件,按微机屏幕上中文人机对话,输入实验数据即可完成干扰校正.     

内蒙古自治区生态环境监测网络站建设方案

本文通过对自治区生态环境状况和现有工作能力的充分分析 ,阐述了建立自治区生态环境监测网络站的必要性、意义和可行性。提出了网络站建设目标和建设内容 ,较详尽地阐述了网络站的监测任务、监测指标、工作职责、内部机构设置、人员素质要求以及仪器设备配置和运行需求等内容。     

烟尘平行采样计算程序的编制及应用

结合ＳＹＣ－Ⅲ型皮托管采样测试仪的特点,编制了具有一定通用性的烟尘平行采样计算程序。该程序包括从烟道布点至除法器评价等５个功能相对独立的计算模块。程序采用菜单选择数据变数输入方式,操作较简便,等速采样流量计算时间〈２０ｓ,具有跟踪烟气基本参数变化,计算均值,快速选取最佳采样嘴等性能。经实际应用于焦炉自动装煤除尘系统及推焦除尘系统的烟尘测定,结果与静压平衡法吻合。     

黄土区大型露天煤矿土地复垦专家系统的程序设计

介绍了采用智能程序设计语言汉化ＴＵＲＢＯ ＰＲＯＬＧ２．０进行黄土区大型露天煤矿土地复垦专家系统中知识库、推理机、解释机制及知识获取与维护模块的具体程序设计及其实现问题。     

塞曼效应石墨管原子吸收法测定人尿痕量镉

以磷酸二氢铵（ＮＨ４、Ｈ２ＰＯ４）作基体改良剂，用塞曼效应扣除背景直接进行石墨管原子吸收法测定尿中痕量镉，该法最低检出限为０．０２４μｇ／Ｌ，相对标准在４．５％，回收率达９５－１１２％。．     

城区热电厂灰水系统简易改造设计方案

作为大气污染控制和节能的有效手段，城区热电厂的数量和规模都在增加，针对目前城区热电厂灰水系统普遍存在的问题和制约因素，对系统简易改造的方案设计方法进行了研究。