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Rocky Land Desertification and its Driving Forces in the Karst Areas of Rural Guangxi, Southwest China

ISSN号：0375-5444
期刊名称：《地理学报》
时间：0
分类：S15[农业科学—土壤学;农业科学—农业基础科学]
作者机构：[1]Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Science, Beijing 100101, China, [2]Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Science, Beijing loolo~, ChinaGraduate University of Chinese Academy of Sciences, Beijing 100039, China
相关基金：Acknowledgements This research was supported by the Project of the National Natural Science Foundation of China （Grant number 40635029; 40871257）, and the Knowledge Innovation Program of Chinese Academy of Sciences （grant number KSCX-YW-09）. The Leading Group Office of Poverty Alleviation of Guangxi Zhuang Autonomous Region offered assistance during field work of this study. Prof. 3ay Gao at the University of Auckland made valuable checking on the manuscript of this paper.

作者： LIU Yansui[1], WANG Jieyong[2], DENG Xiangzheng[1]

关键词：中国, 广西, 岩石, 荒漠化, Rocky land desertification, karstmountain area, rural poverty, driving force, Guangxi, Southwest China

中文摘要：

与亚热带气候，庄光喜自治区域有一处典型石灰岩地区常见的地形风景。岩石沙漠化由于它自然背景和人的活动，因为，它的 ecoenvironment 在最近的年里被败坏了的联合效果引起的高危险成为了一个严肃的环境问题，并且农田同时严厉地一直在消失。接着，这在这个区域的农村区域加重了贫穷水平。在这研究，我们用 1985， 1995， 2000 和 2005 的 Landsat TM/ETM 图象监视了岩石陆地沙漠化和它的时间的进化的空间分发。我们也分析了沙漠化和它的扩大的驱动力。通过由使用所有相关变量并且象固定效果一样考虑落后效果构造回归模型，我们确定了与一些新调查结果在学习区域引起岩石陆地沙漠化的不同因素的准确角色。在这研究的新调查结果是极大地对保存，恢复并且重建有用在 Guangxi 的降级的山环境和在西南中国的另外的石灰岩地区常见的地形区域，并且另外为以后在农村区域减轻贫穷。

英文摘要：

With a subtropical climate, Guangxi Zhuang Autonomous Region has a typical karst landscape. Rocky desertification has become a serious environmental issue due to its high vulnerability caused by the joint effect of natural settings and human activities, because of which its eco- environment has been deteriorated in recent years, and farmland has been disappearing sharply at the same time. This, in turn, has exacerbated the poverty level in the rural areas of the region. In this study, we monitored the spatial distribution of rocky land desertification and its temporal evolution using Landsat TM/ETM images of 1985, 1995, 2000 and 2005. We also analyzed the driving forces of the desertification and its expansion. Through constructing regression models by using all the relevant variables and considering the lagged effects as well as fixed effects, we quantified the exact role of different factors causing rocky land desertification in the study area with some new findings. The new findings in this study are greatly helpful for preserving, restoring and reconstructing the degraded mountain environment in Guangxi and other karst areas in Southwest China, and also for alleviating poverty in the rural areas in the future.

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