Spatial Distribution of Grassland Degradation and Trend in Northern Tibet
Received date: 2006-12-10
Revised date: 2007-03-09
Online published: 2007-04-10
Based on the remote sensing data derived from NOAA/AVHRR with a spatial resolution of 8 km of 1981-2000, SPOT/VGT with a spatial resolution of 1 km of 2001, and MODIS with a spatial resolution of 0.25 km of 2002-2004, as well as other related data of northern Tibet, spatial distribution of grassland degradation in northern Tibet was analyzed with the help of Geographical Information System. This study established a new method to calculate grassland degradation trend coefficient in the northern Tibet and analyzed the grassland degradation trend of this area.
The result indicated that grassland degradation mainly occurred on flat (slope gradients <1 ) in the Northern Tibet and the grassland degradation index (GDI) was higher on the sunny slope than that on the shady slope; the trend of grassland degradation on flat was more significant than that on the slope. Grassland degradation mainly occurred on the elevations ranging from 4500m to 5250m where the largest grassland area is. In this area, grassland degradation is obvious and the trend of grassland degradation is considerable.
YANG Kai, GAO Qing-zhu, LIYu-e, LIN Er-da ,SHENG Wen-ping, et al . Spatial Distribution of Grassland Degradation and Trend in Northern Tibet[J]. Advances in Earth Science, 2007 , 22(4) : 410 -416 . DOI: 10.11867/j.issn.1001-8166.2007.04.0410
[1]Gansu Grassland Ecological Research Institute, Animal Husbandry Bureau of Naqu Prefecture of Tibet. Grassland Resources and Animal Production in the Naqu Region of Tibet [M]. Lanzhou: Gansu Science and Technology Press, 1991.[甘肃草原生态研究所草地资源室,西藏自治区那曲地区畜牧局. 西藏那曲地区草地畜牧业资源[M]. 兰州：甘肃科学技术出版社, 1991.]
[2]Gao Qingzhu, Lin Erda, Li Yu′e, et al. Temporal and spatial distribution of grassland degradation in northern Tibet [J]. Acta Geographica Sinica,2005, 60(6): 965-973.[高清竹, 林而达, 李玉娥,等. 藏北地区草地退化的时空分布特征[J]. 地理学报, 2005, 60(6): 965-973.]
[3]Naqu Statistical Bateau. The Corpus of Statistical data of Naqu Prefecture in Tibet Autonomous Region (1958-2000)[M]. Lasha: Tibet Statistical Press, 2001.[那曲地区统计局. 西藏那曲地区统计资料汇编（1958—2000）[M]. 拉萨：西藏统计出版社, 2001.]
[4]Yu Lianping, Gao Zhanqi, Yang Hu. Sustainable development strategy for grassland animal husbandry in Naqu region, Tibet[J]. Pratacultural Science,2004, 21(11): 44-47.[俞联平, 高占琪, 杨虎. 那曲地区草地畜牧业可持续发展对策[J]. 草业科学, 2004, 21(11): 44-47.]
[5]Zhang Jianguo, Liu Shuzhen, Li Huixia, et al. Analysis on the retrogression of the pasture in Naqu prefecture, Tibetan Autonomous Region[J].Resources Survey and Environment,2004, 25(2): 116-122.[张建国, 刘淑珍, 李辉霞,等. 西藏那曲地区草地退化驱动力分析[J]. 资源调查与环境, 2004, 25(2):116-122.]
[6]Zhou Lin. Process and reasons of rangeland degeneration in Naqu prefecture of Tibet autonomous region[J].Mountain Research,1998, 16(3):239-243.[周麟. 那曲地区草地退化过程及原因剖析[J]. 山地研究, 1998, 16(3): 239-243.]
[7]Wang Yajun, Wei Xinghu, Yang Ping. Effects of over-grazing on vegetation degradation of Kobresia pygmaea meadow in Naqu, Tibet[J].Journal of Lanzhou University (Natural Science),2005, 41(1): 32-38. [王亚军, 魏兴琥, 杨萍. 超载放牧对那曲地区高山嵩草草甸植被退化的影响[J].兰州大学学报:自然科学版, 2005, 41(1):32-38.]
[8]Liu Xuesong, Ma Yucai, Laba, et al. Climatic Regionalization of the Animal Husbandry of Naqu Region [M]. Beijing: China Meteorological Press, 2003.[刘雪松, 马玉才, 拉巴,等. 那曲地区牧业气候区划[M]. 北京：气象出版社，2003.]
[9]Ren Guoyu, Wu Hong, Chen Zhenghong. Spatial patterns of change trend in rainfall of China [J].Quarterly Journal of Applied Meteorology,2000, 11(3): 322-330.[任国玉, 吴虹, 陈正洪. 我国降水变化趋势的空间特征[J]. 应用气象学报, 2000, 11(3): 322-330.]
[10]Zhang Yili, Liu Linshan, Bai Wanqi, et al. Grassland degradation in the source region of the Yellow River[J].Acta Geographica Sinica,2006, 61(1): 3-14.[张镱锂, 刘林山, 摆万奇,等. 黄河源地区草地退化空间特征[J]. 地理学报, 2006, 61(1): 3-14.]
[11]Gao Qingzhu, Jiangcun Wangzha, Li Yu′e, et al. Remote Sensing Monitoring of Grassland Degradation and Eco-Functional Regionalization in Northern Tibet[M]. Beijing: China Meteorological Press, 2006.[高清竹, 江村旺扎, 李玉娥,等. 藏北地区草地退化遥感监测与生态功能区划[M]. 北京：气象出版社, 2006.]
/
| 〈 |
|
〉 |
甘公网安备62010202000687
