辽宁省菱镁矿区生态修复研究

针对辽宁省菱镁矿区资源状况与环境问题,提出菱镁矿区土地生态修复技术对策,包括土壤污染等级分类对策、不同立地条件土地复垦适宜性评价与对策、板结土壤复垦技术与对策和排土场贫瘠土壤肥力改良修复对策,进行适宜性复垦植物筛选与复垦效果评价。     

NEW STRATEGIES FOR AGRICULTURAL DEVELOPMENT IN CHINA''''S MOUNTAIN AREAS

Ｂｙｔｈｅｅｎｄｏｆｔｈｅ 2 0ｔｈｃｅｎｔｕｒｙ ,ｔｈｅｍａｊｏｒｉｔｙｏｆｍｏｕｎｔａｉｎｒｅｇｉｏｎｓｉｎＣｈｉｎａ ,ｅｓｐｅｃｉａｌｌｙｔｈｏｓｅｐｏｖｅｒｔｙ ｓｔｒｉｃｋｅｎａｒｅａｓ,ｈａｄｓｏｌｖｅｄｔｈｅｐｒｏｂｌｅｍｓｏｆｆｏｏｄａｎｄｃｌｏｔｈｉｎｇ .Ｔｈｅｙａｒｅｎｏｗｍａｒｃｈｉｎｇｔｏｗａｒｄｔｈｅｇｏａｌｏｆｌｉｖｉｎｇａｗｅｌｌ ｏｆｆｌｉｆｅ .Ｎｅｗｃｈａｌｌｅｎｇｅｓｔｈａｔｔｈｅｍｏｕｎｔａｉｎｒｅｇｉｏｎｓａｒｅｆａｃｅｄｗｉｔｈｉｎｔｈｅ 2 1ｓｔｃｅｎｔｕｒ…     

基于低碳经济的天津产业结构调整战略

以低碳经济理论为指导,分析了近年来天津产业结构调整成效和存在的不足,认为天津产业结构的“高碳锁定效应”仍较明显。按照发展低碳经济的要求,提出了天津产业结构调整战略：一是加强增量控制,产业增量向第三产业倾斜,逐步“减工业化”;工业增量向高新技术产业、战略性新兴产业倾斜,逐步“降重工业化”;严格限制新增高耗能产业项目,从源...     

Indicators for sustainable energy development in Lithuania

This article summarizes some of the results from the application of the indicators for sustainable energy development (ISED) tool for analyzing Lithuania's energy sector, in terms of trends, setting energy policy goals and monitoring progress towards these goals. This experience illustrates the potential applicability of the ISED methodology for energy policy development in economies in transition, using Lithuania as an example. The article presents a summary of the results achieved and conclusions arrived at from the analysis of six priority areas in the context of the research project coordinated by the International Atomic Energy Agency, and provides recommendations for the development of sustainable energy policy using the ISED approach.     

泛珠三角区域物流的空间组织形式初探

在区域合作的大背景下，基于区域物流发展的背景与研究现状的基础上，对区域物流概念与研究地域的范围进行界定，进而对我国泛珠三角区域物流的空间组织形态做了较为详细的探讨。通过分析认为，目前在泛珠三角区域的物流经济要素处于以集聚为主的阶段，物流经济空间组织采取点、轴、网、面模式，合理的人为调控和组织可以有效促进空间结构的演化，最后提出了相应的调控措施。     

总结经验,进一步推进全国循环经济发展

作者全面阐述了当前我国发展循环经济的重要性、存在的问题,并提出了下一步工作的意见。     

Odour transfer in stingless bee marmelada (Frieseomelitta varia) demonstrates that entrance guards use an “undesirable–absent” recognition system

In group-level recognition, discriminators use sensory information to distinguish group members and non-members. For example, entrance guards in eusocial insect colonies discriminate nestmates from intruders by comparing their odour with a template of the colony odour. Despite being a species-rich group of eusocial bees closely related to the honey bees, stingless bee nestmate recognition is a relatively little-studied area. We studied Frieseomelitta varia, a common Brazilian species of stingless bee known as marmelada. By measuring the rejection rates of nestmate and non-nestmate worker bees by guards, we were able to show that guards became significantly less accepting (from 91 to 46%) of nestmates that had acquired odour cues from non-nestmate workers; however, guards did not become significantly more accepting (from 31 to 42%) of non-nestmates that had acquired equivalent amounts of odour cues from the guard’s nestmates. These data strongly suggest that guards use an “undesirable–absent” system in recognition, whereby incoming conspecific workers are only accepted if undesirable cues are absent, despite the presence of desirable cues. We suggest that an undesirable–absent system is adaptive because robbing by conspecifics may be an important selective factor in F. varia, which would lead to selection for a non-permissive acceptance strategy by guards.