玛曲高寒草甸沙化研究进展──沙化发展及自然诱因

发布时间：2019-01-18 13:32

【摘要】：地处青藏高原东南缘的黄河首曲是黄河全境最主要的产流区、水源涵养区和水源补给区,也是世界重要的生物多样性保护热点地区之一。但自20世纪60、70年代以来,该区地表径流减少、地下水位下降、植被破坏、草场严重退化及水土流失等生态环境问题日趋严重,尤其是草地沙化问题已相当突出,引起了国内外的广泛关注。通过搜集国内外文献,在总结分析的基础上,明确了历史时期玛曲高寒草甸的沙化情况,以及近几十年以来该区域的动态变化过程,探讨了自然因素对玛曲高寒草甸沙化的影响,以期为进一步展开深入研究玛曲高寒草甸沙化提供依据。
[Abstract]:Located in the southeastern margin of the Qinghai-Xizang Plateau, the first bend of the Yellow River is the most important runoff producing area, the water conservation area and the water supply area. It is also one of the most important biodiversity conservation hot spots in the world. However, since the 1960s and 1970s, the ecological environmental problems in this area, such as the decrease of surface runoff, the decrease of groundwater level, the destruction of vegetation, the serious degradation of grassland and soil erosion, etc., have become more and more serious, especially the problem of grassland desertification. It has attracted wide attention at home and abroad. On the basis of summing up and analyzing the literature at home and abroad, the desertification of Maqu alpine meadow in the historical period and the dynamic change process in this area in recent decades are clarified. The influence of natural factors on desertification of Maqu alpine meadow was discussed in order to provide basis for further study on desertification of Maqu alpine meadow.
【作者单位】：甘肃民勤荒漠草地生态系统国家野外科学观测研究站;甘肃省荒漠化与风沙灾害防治重点实验室;甘肃省治沙研究所;
【基金】：国家自然科学基金项目“沙化对黄河首曲高寒草甸植物多样性与生态系统功能的影响”;“石羊河下游衰败人工固沙林中红砂定居过程及其驱动机理研究”(31160111,31360203) 甘肃省自然科学研究基金计划项目“戈壁土壤沃岛植物群落内种间关系对植物共存的作用及影响机制”(1308RJYA081)
【分类号】：S812

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