高校教学区中水回用方式初探

中水作为一种污水处理技术,可以减少淡水资源的使用。高校作为用水大户,优质污水量十分可观,故将中水回用系统引入高校十分必要。基于这种形势。提出一种适合于高校教学区使用的中水回用装置,该装置处理工艺简单,使用方便且维修简单。试验结果表明,处理后的水达到了国家相关标准,可以用于道路清洗或草坪灌溉,具有十分可观的经济、环境和社会效益。     

The paradox of the conservation of an endangered fish species in a Mediterranean region under agricultural intensification

We studied the relative value of natural habitats, river and coastal wetlands, and artificial habitats, irrigation canal and ponds, for the conservation of an endangered fish, Iberian toothcarp, in its southernmost area of distribution, characterised by agricultural intensification. Our results show that the bulk of the population of the Iberian toothcarp is concentrated in irrigation ponds. Natural habitats sustained null or impoverished subpopulations, and individuals showed signs of low metabolic activity. This coincided with the relatively high habitat quality observed in ponds, particularly those with submerged aquatic vegetation, in contrast with the chronic eutrophication of the coastal lagoons. In spite of a generalised aggressive management in the irrigation system, featured by periodic vegetation clearance, desiccation and biocide treatment, the subpopulation of the Iberian toothcarp thrives in it probably thanks to adequate water quality and to an active path dynamics maintained by connectivity through the canal. Agro-environmental measures are discussed for the improvement of this species conservation in natural and artificial habitats.     

关于渝北区宝圣湖长效管理机制及城市湖库保护措施的探讨

通过对渝北区宝圣湖整治措施、整治效果及存在的问题进行分析,结合城市湖库污染成因,探讨了宝圣湖水环境保护长效管理机制及城市湖库环境保护措施,为城市湖库及其他地表水的保护提供依据。     

食用菌工厂化生产模式探讨

食用菌工厂化生产是食用菌产业发展的重要趋势,是食用菌生产技术进步的结晶.国外少数国家实现了部分食用菌的工厂化和自动化生产,我国的食用菌产业仍处于农户栽培模式的初级阶段,工厂化规模生产亟待加强.详细介绍了食用菌工厂化生产的特点、国内外食用菌工厂化生产的现状、存在问题、解决措施及我国食用菌工厂化的发展前景.     

我国农村环境趋恶原因与制度策略

分析了农村环境日趋恶化的原因,从健全环境补偿机制、构建城乡一体化的环境影响评价制度、保障农民的环境参与权和利益请求权3方面,探讨了完善我国农村环境保护的制度策略。     

Testing a key assumption of wildlife buffer zones: is flight initiation distance a species-specific trait?

The distance at which animals flee an approaching predator is known as the ‘flight initiation distance’ (FID). Wildlife managers use FID to develop buffer zones to reduce human impacts on wildlife. Many variables have been demonstrated to influence FID leading one to question whether it can be viewed as a species-specific trait. We tested this critical assumption for developing buffer zones by experimentally approaching eight species of shorebirds found at six sites around Botany Bay, 15 km south of Sydney, Australia. Botany Bay encompasses a range of human impacted areas, from urban developments with high levels of human presence, through to National Parks and wildlife protection areas where human presence is significantly lower. We found that both species and site influenced the distance birds flew away from an approaching human. Importantly, however, there was no significant statistical interaction between site and species demonstrating that ‘flighty’ species were consistently flighty while more tolerant species were consistently tolerant. Taken together, these results suggest that FID can therefore be viewed as a species-specific trait for these shorebirds. The great variability in FID suggests that wildlife managers should be somewhat conservative in developing buffer zones, but they can use previously published FID data for a given species as guidelines for setting buffer zones.