冬季池塘投放鱼种重技巧

实践证明，入冬后至立春前是池塘养鱼投放鱼种的最好时机，其优点如下：①冬季水温低，不利于病菌的繁殖和寄生，可减少鱼种感染病菌的机会，有利于鱼种适应新环境。②冬季气温、水温低，鱼类活动强度小，运输成活率高。③可及早恢复和补充鱼种在越冬及运输过程中的体能消耗，提高产量。     

工程项目生态系统概念与原理研究

依据生态学和应用生态学的基本概念和原理，结合工程项目系统的特征，提出了工程项目生态系统的概念。采用对比分析法对工程项目生态系统的层次结构、原则、组成进行了具体的分析。工程项目生态系统的演化、平衡和生命系统一样，是个非线性的耗散结构,其演化和平衡满足逻辑斯谛模型     

Discussion on Landscape Ecosystem Planning of Small Basins in the Qinghai.Tibet Plateau——Taking Nieruzangbu Basin as an Example

In this paper, taking Nieruzangbu as an example, it is discussed that how to plan landscapes of small basin in the Qinghai-Tibet Plateau. With analyzed the status and character of landscape structure through the use of landscape diversity indexes and landscape dominant indexes, some major problems in the landscape ecosystem are pointed out. On the basis of regional restrictive principle and compliance principle of resources, environment and economy, Nieruzangbu Basin is divided into three landscape function areas. According to the demands of each function area, landscape structure planning is carried out to improve ecological environment through optimization and adjustment of landscape structure in Nieruzangbu Basin.     

Prospects for Future Application of Fugacity Model to Fate Studying of POPs in China

POPs can stay long enough to diffuse and transfer sufficiently in the environment. Researches indicate that it‘s inadequate to study POPs‘ fate and environmental behavior, in order to get comprehensive knowledge of the POPs‘‘ fate and transfer processes in an area, experiment should be combined with model simulation. Recently multimedia models have become the primary choice in simulating organic pollutant‘‘s fate and assessing exposure risk to ecosystem for they can nearly represent the real environment. Among all models,with simple structure, less required parameters, fngacity model has been an efficient tool used widely on simulating the fate and transport of POPs and put into practice in many countries and areas successfully. On the basis of achievements in scientific research, this paper will emphatically take up the following three questions one by one that consist of fngacity model‘‘s principle, pivotal questions and application prospects in China,     

基于GIS的贵州省生态重建决策支持系统设计研究

中国西部大开发的一个重要任务就是生态重建.中国政府制定了在水土流失严重地区实行退耕还林还草的政策.贵州是一个山地占90%的西部省份.由于地理与气象条件的不同,各地的生态重建工作是很不同的.这就需要研制基于GIS的决策支持系统,把不同数据来源的数据和工具以及模型集成到系统中,这些数据可能格式不同,有各种误差,还不互相兼容.本文讨论了开发基于GIS的决策支持系统的目的、策略、结构和技术关键.     

地球的热量能降下来吗？

地球温暖化的负面效应已愈来愈引起人们的不安——地球的热量能降下来吗?     

"再造山川秀美"重建生态整体

“再造山川秀美”是一项宏伟的环境生态建设工程，它面对的是如何从千疮百孔充满分裂的现实，走向保护、恢复与重建生态系统的整体。它必须建立在正确思维方式的基础上，从生态系统的整体性、多样性和谐性，从人类对自然适应的程度，摆正人类在和自然协调发展过程中的位置，正确发挥人的主观能动作用。     

沈阳地区池塘浮游绿藻调查

本文报道了沈阳地区池塘浮游绿藻共二纲五目十三科二十七属四十一种。