植物生态学报 ›› 2019, Vol. 43 ›› Issue (4): 331-341.DOI: 10.17521/cjpe.2018.0254
收稿日期:
2018-10-16
修回日期:
2019-04-15
出版日期:
2019-04-20
发布日期:
2019-05-30
通讯作者:
全占军
基金资助:
SHI Na-Na,XIAO Neng-Wen,WANG Qi,HAN Yu,GAO Xiao-Qi,FENG Jin,QUAN Zhan-Jun()
Received:
2018-10-16
Revised:
2019-04-15
Online:
2019-04-20
Published:
2019-05-30
Contact:
QUAN Zhan-Jun
Supported by:
摘要:
定量评价归一化植被指数(NDVI)变化特征及其驱动机制, 对了解区域生态变化特征, 促进区域生态与社会经济的可持续发展具有重要作用。该文利用MODIS-NDVI数据, 采用趋势分析法探讨了锡林郭勒2000-2015年生长季植被NDVI时空格局; 然后, 将各驱动因子的空间影响面积与植被显著增加/减少区域进行空间叠加分析, 二者比例即为贡献率大小。结果表明: 研究区植被NDVI整体缓慢增加, 呈现“东北高西南低”的分布格局。NDVI显著增加面积大约是显著减少面积的2倍, 且在气候和人类活动的双重作用下, 植被NDVI表现出显著的空间异质性。在NDVI显著增加区域, 气候影响比例为47.79%, 且降水和气温影响比例相当; 禁牧及草畜平衡政策是最主要的人为影响因素, 占比69.55%。在NDVI显著减少区域, 气候因素占比52.55%, 且以降水影响为主; 人类活动占比24.73%。在NDVI显著增加区域, 人类活动的影响大于气候因素, 且二者耦合作用较突出。
史娜娜, 肖能文, 王琦, 韩煜, 高晓奇, 冯瑾, 全占军. 锡林郭勒植被NDVI时空变化及其驱动力定量分析. 植物生态学报, 2019, 43(4): 331-341. DOI: 10.17521/cjpe.2018.0254
SHI Na-Na, XIAO Neng-Wen, WANG Qi, HAN Yu, GAO Xiao-Qi, FENG Jin, QUAN Zhan-Jun. Spatio-temporal dynamics of normalized differential vegetation index and its driving factors in Xilin Gol, China. Chinese Journal of Plant Ecology, 2019, 43(4): 331-341. DOI: 10.17521/cjpe.2018.0254
图2 锡林郭勒2000-2015年归一化植被指数(NDVI)时间序列特征。A, 区域NDVI。B, 不同生态系统类型NDVI。
Fig. 2 Time-series dynamics of normalized differential vegetation index (NDVI) in Xilin Gol during 2000-2015. A, Regional NDVI value. B, NDVI value of different ecosystem types.
图3 锡林郭勒归一化植被指数(NDVI)空间分布特征。A, 生态系统类型。B, NDVI分级。
Fig. 3 Spatial distribution of normalized differential vegetation index (NDVI) in Xilin Gol. A, Ecosystem types. B, NDVI classification.
图4 锡林郭勒盟归一化植被指数(NDVI)变化显著性检验结果。A, 2000-2015年。B, 2000-2010年。C, 2010-2015年。
Fig. 4 Significance of spatial changes of normalized differential vegetation index (NDVI) in Xilin Gol. A, 2000-2015. B, 2000-2010. C, 2010-2015.
图5 锡林郭勒2000-2015年归一化植被指数(NDVI)与气候因素相关性空间分布。A, 降水。B, 气温。
Fig. 5 Spatial distribution of correlation between normalized differential vegetation index (NDVI) and climate factors in Xilin Gol during 2000-2015. A, Precipitation. B, Air temperature.
图6 植被归一化指数(NDVI)显著增加区域驱动因子空间分布。A, 气候因子。B, 人类活动因子。
Fig. 6 Spatial distribution of driving factors in region with significant increased normalized differential vegetation index (NDVI). A, Climatic factors. B, Human activities.
图7 植被归一化指数(NDVI)显著减少区域驱动因子空间分布。A, 气候因子。B, 人类活动因子。
Fig. 7 Spatial distribution of driving factors in region with significant decreased normalized differential vegetation index (NDVI). A, Climatic factors. B, Human activities.
图8 锡林郭勒2000-2015年归一化植被指数(NDVI)(A)和牲畜存栏数(B)变化。
Fig. 8 Changes of vegetation normalized differential vegetation index (NDVI)(A) and livestock inventory (B) in Xilin Gol during 2000-2015.
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