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Alternative TitleThe EVI trends and driving factors in Red River Basin affected by thecorridorbarrier function during 20002014
何奕萱1; 易桂花2,3; 张廷斌1,4,5; 李景吉6,7; 别小娟1; 闾利1; 郑飞鸽1
Corresponding Author易桂花
Source Publication生态学报
Contribution Rank3
Abstract红河流域地表生态、水热分布格局等受到通道-阻隔作用的显著影响,以MODIS EVI数据作为植被定量研究指标,结合全国1 ∶ 100万植被类型图、红河流域内部以及周边气象数据和研究区的DEM数据,利用趋势分析和相关性分析法,探讨在通道-阻隔作用的影响下流域内20002014年植被EVI时空变化趋势及其驱动力,重点研究了植被EVI变化对气候因子的响应规律。结果表明:(1)20002014年间,红河流域生长季植被EVI整体上以-0.15%/a的年际变化率呈波动减少趋势,空间异质性明显。EVI呈减少趋势区域主要集中在绿春县中部和金平县西南部;EVI呈增加趋势区域集中分布在墨江县、文山县,麻栗坡中部、广南-富宁南部区域、红河-元江一带以及藤条江西南部地区。(2)通过对生长季EVI指数与四个不同时间序列的月平均气温和月累积降水量的相关分析可知,生长季EVI指数与同期气温相关性较好;与降水量呈现明显的滞后性,滞后时间约为1个月。(3)相关分析表明,整体上红河流域生长季植被EVI与气温呈负相关关系,与降水呈正相关关系。在0.05显著性检验水平下,红河流域生长季植被EVI变化受气候影响的区域占3.11%,气温以负向驱动型为主,面积约占1.26%,降水以正向驱动型为主,面积约占0.46%,气温降水联合驱动以弱驱动为主,面积约占1.39%;大部分地区表现为受非气候因子驱动。
Other AbstractSurface ecology and hydrothermal distribution are significantly affected by thecorridor-barrierfunction in the Red River Basin. This study investigated spatiotemporal trends in the enhanced vegetation index (EVI) and the driving force of its effect from 2000 to 2014 in the Red River Basin. Especially,the response of climatic factors based on the MODIS EVI,combined with the vegetation map,meteorological data,as well as topographic data,were investigated and a trend line and correlation analysis were used. The results showed that: (1) from 2000 to 2014,the Red River Basin EVI showed a declining fluctuating trend,with an annual change rate of - 0.15%,with clear spatial heterogeneity. The decreasing area mainly occurred in central Lvchun County and southwest Jinping County,while the increasing area was concentrated in Mojiang County,Wenshan County,the midlands of Malipo,southern Guangnan-Funing County,Yuanjiang- Honghe County,and the southwest of the Tengtiao River. (2) The analysis between the EVI in the growing season and four different time series of climatic factors (monthly mean air temperature and monthly precipitation) showed that the EVI was positively correlated with contemporaneous air temperature. An evident delayed response of EVI to precipitation was observed,accounting for approximately 1 month. (3) Correlation analysis indicated that,in general,EVI was positively correlated with precipitation and negatively correlated with air temperature during the growing season. At the 0.05 level of significance,analysis of the effect of driving factors on EVI showed that about 3.11% of the study area was impacted by climatic driving factors,whereby 1.26%,0.46% and 1.39% of the area was impacted by air temperature (negative driving effect),precipitation (mainly positive driving effect),and air temperature and precipitation combined, respectively. However,the EVI was affected by non-climatic driving factors in most areas.
Keyword增强型植被指数 气候变化 驱动力 红河流域
Indexed ByCSCD
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Cited Times:12[CSCD]   [CSCD Record]
Document Type期刊论文
Recommended Citation
GB/T 7714
何奕萱,易桂花,张廷斌,等. 红河流域通道-阻隔作用下20002014年植被EVI变化趋势与驱动力[J]. 生态学报,2018,38(6):2056-2064.
APA 何奕萱.,易桂花.,张廷斌.,李景吉.,别小娟.,...&郑飞鸽.(2018).红河流域通道-阻隔作用下20002014年植被EVI变化趋势与驱动力.生态学报,38(6),2056-2064.
MLA 何奕萱,et al."红河流域通道-阻隔作用下20002014年植被EVI变化趋势与驱动力".生态学报 38.6(2018):2056-2064.
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