近35a若尔盖高原泥炭沼泽变化趋势与驱动力分析  

Change Trend and Driving Force of Peatlands in the Zoige Plateau in Recent 35 Years

作　　者：王云川[1] 易桂花[2,3] 张廷斌[1,4,5] 别小娟[1] 王继斌[1] 孙姣姣[1] WANG Yun-chuan YI Gui-hua ZHANG Ting-bin BIE Xiao-juan WANG Ji-bin SUN Jiao-jiao(College of Earth Sciences, Chengdu University of Technology, Chengdu 610059, Sichuan, China College of Management Science, Chengdu University of Technology, Chengdu 610059, Sichuan , China Institute of Mountain Hazards and Environment Research, Chinese Academy of Sciences, Chengdu 610041, Sichnan, China Key Laboratory of Geoscience Spatial Information Technology, Ministry of Land and Resources, Chengdu 610059, Sichuan, China College of Engineering ＆ Technology, Chengdu University of Technology, Leshan 614000, Sichuan , China)

机构地区：[1]成都理工大学地球科学学院,四川成都610059 [2]成都理工大学管理科学学院,四川成都610059 [3]中国科学院水利部成都山地灾害与环境研究所,四川成都610041 [4]地学空间信息技术国土资源部重点实验室,四川成都610059 [5]成都理工大学工程技术学院,四川乐山614000

出　　处：《干旱区研究》2017年第2期403-410,共8页Arid Zone Research

基　　金：国家科技支撑项目"重点领域气候变化影响与风险评估技术研发与应用"(2012BAC19B05)

摘　　要：选取Landsat系列陆地卫星遥感数据作为数据源,采用主成分变换技术提取了1977年、1994年、2007年和2013年4期若尔盖高原泥炭沼泽的分布状况,分析了近35 a若尔盖高原泥炭沼泽的分布与变化趋势。结果显示:近35 a泥炭沼泽分布面积整体呈减少趋势,从1977年的1 997.08 km^2减少到2013年的1 358.66 km^2,减少幅度达到31.97%。该区泥炭沼泽的退化经历了由慢到快,然后逐渐向好的过程,其中1994—2007年是退化高峰期,退化速率为29.1 km^2·a^(-1)。同时,区内泥炭沼泽的退化方式也表现出一定的地域差异,西北部以沙化为主,而东南部退化则主要表现为草甸化。The four distribution maps of peatlands were extracted by principal component analysis based on remote sensing of Landsat series in 1977,1994,2007 and 2013 in the Zoige Plateau,and the distribution and change trend of peatlands in recent 35 years were analyzed. The results revealed that the distribution area of peatlands was holistically in a reduction trend,the area was reduced from 1 997. 08 km^2 in 1977 to 1 358. 66 km^2in2013,and the reduction was 31. 97%. The degradation of peatlands was slow at first,then sped up,and the peatlands were gradually restored. The degradation peak of peatlands occurred during the period from 1994 to 2007,and the degradation rate was 29. 1 km^2·a^-1. There was a regional difference of degradation mode of peatlands,sandification was dominant in the northwest,and meadow was the main mode in the southeast.

关 键 词：泥炭沼泽 时空变化 变化趋势 驱动力 若尔盖高原 

分 类 号：Q15[生物学—普通生物学]