共查询到11条相似文献,搜索用时 62 毫秒
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蘑菇在稻油鱼菇生态田中的合理布局及作用刘祖贵,赵先男为提高土地的利用率,增加农民的收入,我们从1991~1994年进行了“三高”农业种植模式之—──稻油鱼菇生态结构的研究。研究结果表明,蘑菇插入田间后对水稻、油菜均具有较大的增产作用。研究方法:研究工... 相似文献
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生态城市的内涵与理论基础 总被引:1,自引:0,他引:1
刘天齐 《中国环境管理干部学院学报》2000,(2)
当前我国的城市发展建设中,有相当多的城市制定环境保护规划、建设生态城市。本文对生态城市的内涵和理论基础进行论述,以期对生态城市建设有所助益。 相似文献
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Effects of Increasing Urbanization on the Ecological Integrity of Open Space Preserves 总被引:3,自引:0,他引:3
This article analyzes the effects of increasing urbanization on open space preserves within the metropolitan area of Phoenix,
Arizona, USA. Time series analysis is used in 10-year increments over 40 years to study urban landscape change. Three landscape
metrics—(1) matrix utility (measures intensity of adjacent land uses), (2) isolation (measures distances to other open space
patches), and (3) connectivity (measures physical links to other open space patches and corridors)—are used to assess changes
in landscape patterns and serve as indicators of urban ecological integrity of the open space preserves. Results show that
in the case of both open space preserves, general decline in indicators of urban ecological integrity was evident. The matrix
utility analysis demonstrated that increasing intensity of land uses adjacent to preserve is likely to increase edge effects,
reducing the habitat value of interior or core habitat areas. Isolation analysis showed that both preserves have experienced
increasing isolation from other open space elements over time. Also, connectivity analysis indicated that terrestrial connections
to other open space elements have also deteriorated. Conclusions of this research demonstrate that while preservation of natural
areas as open space is important in an urban context, intense development of surrounding areas reduces the urban ecological
integrity significantly. 相似文献
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在分析文化生态保护区理论来源的基础上,综述了文化生态保护区理论和实践研究现状.结果发现,国内外对文化生态保护区的理论研究主要是建立文化生态学的概念体系,实践研究主要是通过建立"生态博物馆"进行文化生态保护.我国在文化生态保护区的理论探讨和实际建设方面与国外有着较大差距,还处于起步阶段,需要从基础理论、现有经验总结、非物质文化遗产保护、资源开发利用等方面做进一步的研究. 相似文献
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田间试验表明,深沟窄畦结构扩大了稻田生物的生境容量,畦麦沟鱼、稻鱼共生结构提高了稻田生产力,稻麦年产量稳定达到10.84~11.83t/ha,鱼产量3.11~4.20t/ha,在稻田产出中鱼占有最大产值优势度,系统能流结构表现出新特点,生态效率高。 相似文献
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湿地是地球上具有多功能的独特生态系统,是自然界最富生物多样性的生态景观和人类最重要的生存环境之一。内陆干旱区的湿地则因其所处地理环境的特殊性更具有巨大保护价值。艾比湖湿地在我国内陆荒漠自然生态系统中具有一定典型性。其生态系统极不稳定,具有很强的敏感性和脆弱性。人类社会经济的迅猛发展,引起一系列以土地荒漠化为代表的生态逆向演替,严重的水土流失和锐减的生物多样性使其不可更新资源的能值投入远远超过其可更新资源,同时,肆虐的盐尘严重危害着天山北坡经济带甚至更远地区工、农、牧业生产和人们的生活环境。从能值角度评价环境的贡献,注重其生态效应,以期引起人们警醒,加强湿地资源的保护和管理,维护其可持续发展。 相似文献
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本文针对如何正确处理开发旅游资源与保护景观的关系,运用景观生态学原理,阐述了景观生态协调机制的基本内容和实现这一机制的途径. 相似文献
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