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外来种互花米草在广西海岸的入侵现状及防治对策 总被引:8,自引:0,他引:8
本文在分析外来种互花米草引入历史和入侵现状的基础上,结合国内外的研究进展,提出了防范对策,以保护好近海滩涂、原有红树植物及其他海洋生物资源,维持保护区生态系统的独特性和稳定性。同时也可为其它地区互花米草入侵防治提供借鉴。 相似文献
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分析了当前运城市水资源面临的严峻形势.由于地下水的严重开采,导致环境水文地质条件的变化;由于乡镇企业的突猛发展,使地面水体污染严重.针对上述一系列问题,提出了综合治理的措施. 相似文献
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对江西省气象部门人才队伍现状进行了统计,分析了存在的差距及原因,预测了未来气象事业对人才的需求趋势。并就加强我省气象部门人才队伍建设提出了相应的对策和措施。 相似文献
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我国坡地资源利用生态环境效应的研究现状综述 总被引:3,自引:0,他引:3
坡地资源是重要的土地资源,开发利用坡地资源是人类极为重要的物资来源。坡地资源利用存在正负两方面的生态环境效应,合理利用有利于养分和水分的循环,不适宜的开发利用将导致养分和水分循环的失调,坡地资源退化。因此,开展坡地资源利用及其生态环境效应研究,探讨各地开发、利用坡地资源模式及坡地资源退化防治措施,对农业生产实践具有十分重要的理论指导意义。文中从3个方面介绍我国坡地资源利用生态环境效应的研究现状:一是坡地资源利用研究的理论方法,包括实地观测试验与防治措施研究;二是从不同尺度包括区域尺度、小流域尺度和坡面尺度研究坡地资源利用的生态环境问题;三是研究坡地资源利用的生态环境效应。最后,综合分析我国坡地资源利用生态环境效应研究存在的问题,指出今后展开深入研究的方向。 相似文献
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Eco-environmental effects of the Qinghai-Tibet Plateau uplift during the Quaternary in China 总被引:4,自引:0,他引:4
The Qinghai–Tibet Plateau uplifted >3000 m in the Quaternary period. The average rate of uplift was 1–1.1 mm/year. The uplifting
has remolded the geomorphology of China. The landform in China was changed from west-low and east-high to west-high and east-low
in three steps. The Qinghai-Tibet Plateau uplift is an important factor that affected the climate and the environment of China
in the Quaternary period. It controls atmospheric circulation and climatic change in Asia and even the northern hemisphere,
by dividing the westerlies into two branches: south and north. The plateau gradually became a heat source in summer and a
cold source in winter. The uplift had a decisive effect on the formation of the East-Asia monsoon, which increased the climatic
differences between the glacial period and the interglacial period. The climate and environment of China are characterized
by the influences of the plateau uplift. The east of China became the south-east monsoon area, whereas the south-west became
the south-west monsoon area and the north-west turned into an arid inland region. The Gobi and large-scale deserts that formed
in the inland basins are ceaselessly extending. The climate of northern China became more arid as the Qinghai-Tibet Plateau
continued to uplift. The Plateau uplift affected glacial evolvement and loess formation, and propelled the migration of cold-
and warm-blooded animals, which differed from other regions of the world at the same latitude.
Received: 30 August 1999 · Accepted: 18 April 2000 相似文献
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本文从区域地质环境条件、水资源供给形势、地面沉降灾害影响情况、防治目标及防治工作5个方面分析了北京市地面沉降防治形势,提出了防治对策。 相似文献
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