云南湿地资源及保护对策研究

由于云南独特的地理环境,造就了其丰富的湿地资源,这些湿地资源具有多样性、特殊性与显著性。随着人们对保护湿地重要性的认识逐渐加深,云南湿地资源已经得到了较好的管理与保护,与此同时也有一些问题突显出来。通过对云南湿地的类型及基本特征的分析,对云南湿地资源的研究,针对云南湿地环境所面临的威胁,提出了云南湿地资源的保护和可持续利用的对策。     

玉溪市城市湿地资源保护与修复规划研究

文章以玉溪城市湿地资源保护与修复规划为研究对象,在分析现状湿地资源的基础 上,探讨玉溪市湿地保护与修复的空间格局,分析玉溪湿地生态核、湿地生态节点、湿地生态廊 道等方面的规划策略和实施措施,促进城市生态的良性发展。     

仙居县湿地资源现状及保护对策

通过对仙居县湿地资源的调查,概述了该县湿地资源的现状,指出了湿地资源保护存在的问题,同时对湿地保护及修复提出建议.     

海口新增2个国家级和5个省级湿地公园

正国家林业局日前公布了全国64处湿地开展国家湿地公园试点名单,海南4个湿地公园试点上榜,其中包括海口五源河湿地公园、海口美舍河湿地公园。同时,海南新批准建立的5个省级湿地公园,全部集中在海口。根据《海口市湿地保护修复总体规划》,全市将全面加强湿地资源保护和实现湿地资源的可持续利用,改善人居环境质量,建设50余个湿地公园和小区,朝着"湿地城市"的目标迈进。     

云南省湿地资源保护进展及建议

湿地生态系统是陆地生态系统的重要组成部分,同时也是现代林草工作重要的保护研究对象.全面保护湿地资源,是当今社会发展的迫切要求,是全面提升自然生态系统稳定性和生态服务功能的重要措施,同时也是构建西南地区生态安全屏障的重要途径.系统总结了云南省在湿地资源保护方面开展的工作,分析了云南省湿地保护工作面临的问题,针对性地提出了湿地资源保护建议.     

湿地生态恢复技术研究现状与展望

湿地是自然界最富生物多样性的生态系统之一，与社会发展及人类福祉关系密切。近些年，由于我国经济发展带来的气候变化及人类活动的过度影响，湿地正面临着面积减少、功能减弱、多样性降低等问题。伴随着生态文明建设成为社会主义建设的重要支柱，湿地生态修复工作也得到了重要的制度保障。结合湿地属性及政策保障有针对性地对湿地进行保护与修复，对区域的湿地保护及生态环境建设具有重要意义。从湿地恢复理论及湿地恢复原则入手，阐述了湿地恢复的主动恢复模式和被动恢复模式；从生境恢复技术、生物恢复技术、土壤修复技术、水文修复技术、植被恢复研究、案例分析等方面介绍了湿地恢复的技术及案例，最后提出了出台政策、湿地恢复重塑、湿地旅游资源利用及湿地保护的创新机制试点等湿地保护的重点措施建议。     

西溪湿地公园生物多样性保护与生态景观形成

本文综述了西溪国家湿地公园的动植物资源现状,以及西溪湿地综合保护工程在建立生物多样性保护体系和构建生态景观中的积极工作,并在此基础上提出进一步保护和修复的措施。     

仙居县湿地资源现状及保护对策

通过对仙居县湿地资源的调查,概述了该县湿地资源的现状,指出了湿地资源保护存在的问题,同时对湿地保护及修复提出建议。     

浅谈湿地生态保护、修复及可持续发展对策

随着经济的发展,人类越来越重视对自然的保护。湿地生态是地球中很重要的一个生态系统,也是人类生存的重要环境资源。但是由于人类对湿地生态的保护措施不到位,导致生态系统遭到严重破坏,直接影响了自然环境,所以,相关人员必须要采取相应的修复措施来改善湿地生态,恢复自然环境。本文以此为背景探讨湿地生态保护、修护及可持续发展对策。以期能够保护自然环境,使人类和生物在良好的生态环境中生存。     

湿地公园景观设计研究

湿地是人类赖以生存和发展的重要资源之一,被誉为”地球之肾”.由于经济社会的快速发展,湿地生态环境遭到了极大的破坏,而湿地公园的建设成为保护湿地资源的一个重要的措施.湿地景观的空间格局是湿地公园建设的关键所在,运用景观生态学、生态规划学以及生态工程学等规划设计理论,对湿地公园的景观设计进行了全面的研究探索,为湿地保护的理论与实践的工程实践提供了理论依据.     

Segregation of form, color, movement, and depth: anatomy, physiology, and perception

Anatomical and physiological observations in monkeys indicate that the primate visual system consists of several separate and independent subdivisions that analyze different aspects of the same retinal image: cells in cortical visual areas 1 and 2 and higher visual areas are segregated into three interdigitating subdivisions that differ in their selectivity for color, stereopsis, movement, and orientation. The pathways selective for form and color seem to be derived mainly from the parvocellular geniculate subdivisions, the depth- and movement-selective components from the magnocellular. At lower levels, in the retina and in the geniculate, cells in these two subdivisions differ in their color selectivity, contrast sensitivity, temporal properties, and spatial resolution. These major differences in the properties of cells at lower levels in each of the subdivisions led to the prediction that different visual functions, such as color, depth, movement, and form perception, should exhibit corresponding differences. Human perceptual experiments are remarkably consistent with these predictions. Moreover, perceptual experiments can be designed to ask which subdivisions of the system are responsible for particular visual abilities, such as figure/ground discrimination or perception of depth from perspective or relative movement--functions that might be difficult to deduce from single-cell response properties.     

Mineralogy, petrology, and surface features of lunar samples 10062,35, 10067,9, 10069,30, and 10085,16

The primary rocks are a sequence of titanium-rich basic volcanics, composed of clinopyroxene, plagioclase, and ilmenite with minor olivine, troilite, and native iron. The soil and microbreccias are respectively loose and compacted mixtures of fragments and aggregates of similar rocks, minerals, and glassy fragments and spheres. Impact events are reflected by the presence of shock metamorphosed rock fragments, breccias, and glasses and their resulting compaction to form complex breccias, glass-spattered surfaces, and numerous glass-lined craters. Chemistry of the glasses formed by the impact events is highly variable, and the high iron and nickel content of a few moundlike features suggests that at least some of the projectiles are iron and nickel-rich meteorites.     

Research and development, productivity, and inflation

R & D, through its effects on the rate of productivity increase, can significantly restrain the rate of inflation in the medium and long run. High rates of inflation damage the workings of the price system and impair the efficiency of practically all economic activities, including R & D. Findings suggest that the percentage increase between 1969 and 1979, in total real R & D expenditures, has been exaggerated due to the inadequacy of the gross national product deflator as applied to R & D.     

Space, stars, c60, and soot

Although carbon has been subjected to far more study than all other elements put together, the buckminsterfullerene hollow-cage structure, recently proposed to account for the exceptional stability of the C(60) cluster, has shed a totally new and revealing light on several important aspects of carbon's chemical and physical properties that were quite unsuspected and others that were not previously well understood. Most significant is the discovery that C(60) appears to form spontaneously, and this has particularly important implications for particle formation in combustion and in space as well as for the chemistry of polyaromatic compounds. The intriguing revelation that 12 pentagonal "defects" convert a planar hexagonal array of any size into a quasi-icosahedral cage explains why some intrinsically planar materials form quasi-crystalline particles, as appears to occur in the case of soot. Although the novel structural proposal has still to be unequivocally confirmed, this article pays particular attention to the way in which it provides convincing explanations of puzzling observations in several fields, so lending credence to the structure proposed for C(60).     

Strategic command, control, communications, and intelligence

Command, control, communications, and intelligence (C(3)l) for nuclear forces are essential elements in the deterrence of nuclear war. The present C(3)l) system has vulnerabilities associated with its reliability, survivability, and endurance under attack, thereby weakening deterrence by increasing the ambiguity in our capabilities. Development of a reliable and enduring C(3)l) system would reduce this ambiguity. Its reliable, positive control of nuclear forces would give the national leadership more time to assess situations, ensure discriminate retaliation, and improve our ability to manage crises in general. These capabilities could help to stop a war rapidly should one start. A reliable and enduring C(3)1) system will be needed for a long time to come, even if a freeze on strategic nuclear forces is accomplished or other arms control successes achieved. Indeed, C(3)l) may be the best source today of confidence-building measures to reduce tensions and the threat of nuclear catastrophe.