|
|
|
| NDVI at a Vertical Gradient in the Ebinur Lake Basin, Xinjiang, China |
| Deng Yulin1,2, Tashpolat Tiyip2, Jiang Hongtao3, Zhang Fei1,2, Mamat Sawut1,2, Nurmamatjan Obulkasim1,2 |
1. College of Resources and Environment Sciences, Xinjiang University, Urumqi 830046, China;
2. Key Laboratory of Oasis Ecology under Ministry of Education, Xinjiang University, Urumqi 830046, China;
3. Xinjiang Key Laboratory of Smart City and Environmental Modelling, Xinjiang University, Urumqi 830046, China;
2. School of Resource and Environmental Sciences, Wuhan University, Wuhan 430079, China |
|
|
|
|
Abstract Vegetation is the most essential part of terrestrial ecosystem, its temporal/spatial changes in normalized difference vegetation index (NDVI) have been widely used in correlation studies. In this paper, MODIS-NDVI datasets in 2000-2011 are used for monitoring vegetation changes in the Ebinur Lake basin, MVC method is applied to make up the 12-year maximum NDVI, DEM data are divided into six intervals to revealing the relationship between NDVI and altitude; established 12-year NDVI trends by linear regression, analysis the trends of NDVI in different elevation intervals. The results showed that: (1) Overall, NDVI values comply well with elevation in six scales, with R2>0.88, elevation with 10 equal intervals and NDVI have the highest correlation, with R2=0.97; NDVI is increasing with the elevation under 2 500 m, is decreasing above 2 500 m; (2) The average of NDVI trend is 1.03 in the studied area, showing that the overall improvement of eco-environment; and it has a decreasing trend of vegetation above 1 500 m, while it shows a rising trend of vegetation blow 1 200 m in the past 12 years in the studied area; (3) In each scale, the average values of the NDVI trend are in the range of -42-54, indicating that large parts of study area are slightly improved and light degradation. The paper provide a new view to study the NDVI changes under different elevation intervals, it is of significance and value to local ecological environment construction.
|
|
Received: 04 July 2014
Published: 20 March 2015
|
|
|
| [1] 吴发启.水土保持学概论[M].北京:中国农业出版社,2003:93-95.[2] 顾娟,李新,黄春林.若干时序MODIS NDVI的黑河流域土地覆盖分类研究[J].地球科学进展,2010,25(3):317-326.[3] 陈燕丽,龙步菊,潘学标,等.基于MODIS NDVI和气候信息的草原植被变化监测[J].应用气象学报,2010,21(2):229-236.[4] 徐浩杰,杨太保,曾彪.黄河源区植被生长季NDVI时空特征及其对气候变化的响应[J].生态环境学报,2012,21(7):1205-1210.[5] Li Z,Huffman T,McConkey B,et al.Monitoring and modeling spatial and temporal patterns of grassland dynamics using time-series MODIS NDVI with climate and stocking data[J].Remote Sensing of Environment,2015,138:232-244.[6] 包刚,覃志豪,包玉海,等.1982-2006年蒙古高原植被覆盖时空变化分析[J].中国沙漠,2013,33(3):918-927.[7] Eckert S,Husler F,Liniger H.Trend analysis of MODIS NDVI time series for detecting land degradation and regeneration in Mongolia[J].Journal of Arid Environments,2015,113:16-28.[8] 张亚玲,苏惠敏,张小勇.1998-2012年黄河流域植被变化时空分析[J].中国沙漠,2014,34(2):597-602.[9] 崔丹丹,张耀南,陈广庭.2001-2010年甘肃省植被覆盖的时空变化[J].中国沙漠,2014,34(4):1161-1166.[10] Petus C,Lewis M,White M.Monitoring temporal dynamics of Great Artesian Basin wetland vegetation,Australia,using MODIS NDVI[J].Ecological Indicators,2013,34:41-52.[11] 李根,景元书,王琳,等.基于MODIS时序植被指数和线性光谱混合模型的水稻面积提取[J].大气科学学报,2014,37(1):119-126.[12] Moriondo M,Maselli F,Bindi M.A simple model of regional wheat yield based on NDVI data[J].European Journal of Agronomy,2007,26(3):266-274.[13] Son N T,Chen C F,Chen C R,et al.Monitoring agricultural drought in the lower Mekong Basin using MODIS NDVI and land surface temperature data[J].International Journal of Applied Earth Observation and Geoinformation,2012,18:417-427.[14] 于雪英,江南.基于RS、GIS技术的湖面变化信息提取与分析--以艾比湖为例[J].湖泊科学,2003,15(1):81-84.[15] 钱亦兵,吴兆宁,蒋进,等.近50 a来艾比湖流域生态环境演变及其影响因素分析[J].冰川冻土,2004,26(1):17-26.[16] 谢正宇,李文华,谢正君,等.艾比湖湿地自然保护区生态系统服务功能价值评估[J].干旱区地理,2011,34(3):532-540.[17] 杨军,傅德平,杨晓东,等.艾比湖湿地自然保护区典型群落物种多样性分析[J].干旱区资源与环境,2010,24(2):145-149.[18] 王宏,塔西甫拉提·特依拜,谢霞,等.新疆艾比湖地区不同土地利用类型的土壤盐渍化敏感性评价[J].地理科学进展,2011,30(5):593-599.[19] 谢霞,塔西甫拉提·特依拜.艾比湖流域绿洲化与荒漠化过程时空演变研究[J].中国沙漠,2013,33(1):38-45.[20] 杨志国,赵秀海,刘向民,等.黄羊滩沙地不同造林措施对植被恢复和土壤风蚀的影响[J].中国水土保持科学,2009,7(1):74-79.[21] 王正兴,刘闯,Huete A.植被指数研究进展:从AVHRR_NDVI到MODIS-NDVI[J].生态学报,2003,23(5):979-987.[22] 朱源,彭光雄,王志,等.基于MODIS-NDVI的西藏林芝地区植被时空变化研究[J].地理与地理信息科学,2010,26(5):58-62.[23] 李艳忠,罗格平,周德成,等.天山北坡高山林线分布的生态地理特征[J].中国沙漠,2012,32(1):122-131. |
| No Suggested Reading articles found! |
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
Cited |
|
|
|
|
| |
Shared |
|
|
|
|
| |
Discussed |
|
|
|
|
2015, Vol. 35 
