SHI Nana,QUAN Zhanjun,HAN Yu,et al.Spatio-temporal Changes of Vegetation NDVI and Its Relationship with Regional Climate in Wood-grass Ecotone of Northeast China During 2000-2010[J].Research of Soil and Water Conservation,2016,23(05):175-182.
东北林草交错区植被NDVI时空特征及其与气候因子关系分析
- Title:
- Spatio-temporal Changes of Vegetation NDVI and Its Relationship with Regional Climate in Wood-grass Ecotone of Northeast China During 2000-2010
- 分类号:
- TP79;X171.1
- 摘要:
- 利用2000—2010年MODIS NDVI数据集和同期气象数据集，分别从时间序列和空间格局上分析了东北林草交错区及其3个生态子区（典型草原区、森林区和森林草原区）植被NDVI变化特征及其对气温、降水的年际和年内响应关系。结果表明：（1）多年月均NDVI年内变化曲线表现为单峰型；多年季均NDVI夏季最高；逐年NDVI总体波动上升；（2）多年植被NDVI空间差异显著，总体呈现东高西低、由东向西递减的特征，其中，森林区平均NDVI最高，典型草原区平均增加速率最大；（3）在年际关系上，全区、典型草原区、森林区、森林草原区植被NDVI的主要气候影响因子分别为气温、降水、气温、降水；（4）在年内关系上，植被NDVI与降水呈显著线性关系，与气温呈显著指数关系；在生长季，典型草原区对气温和降水均有时滞响应，且对降水的响应更高，森林草原区对降水具有时滞响应。
- Abstract:
- Based on MODIS NDVI data and meteorological data during 2000—2010, spatial and temporal distribution of NDVI and its relationship with regional climate in wood-grass ecotone of Northeast China were analyzed. The ecotone was composed of typical grass zone, wood zone and wood-grass zone. The results showed that: (1) Monthly average variation of NDVI had a single peak, quaternary variation of NDVI had the highest value in summer; NDVI went up with fluctuation from 2000 to 2010; (2) There were significant spatial differences in vegetation NDVI, which generally decreased from east to west; the wood zone had the highest NDVI and the grass zone had the fastest increasing rate; (3) The inter-annual changes for the selected ecotone as a whole, the typical zone, the wood zone and the wood-grass zone were respectively correlated to precipitation, temperature, precipitation and temperature; (4) Within a year, NDVI had a significantly linear correlation with precipitation and exponential correlation with temperature; Both precipitation and temperature had time lag effects on NDVI during the growing season, with greater effects of precipitation than that of temperature; forest-grass zone had a lagging response to precipitation.
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备注/Memo
收稿日期:2016-01-27;改回日期:2016-02-22。
基金项目:中央级公益性科研院所基本业务专项“半干旱采煤塌陷区土壤养分循环过程及控制”（2013-YSKY-14）
作者简介:史娜娜(1983-),女,山东潍坊人,硕士,工程师,主要从事生态学研究。E-mail:shinn123@163.com
通讯作者:全占军(1979-),男,河北张家口人,博士,副研究员,主要从事恢复生态学、景观生态学研究。E-mail:quanzj@craes.org.cn