Q948， X171
广西自然科学基金项目“气候变化和人类活动对西南喀斯特地貌区植被覆盖变化相对作用研究”(2020GXNSFBA297160);广西空间信息与测绘重点实验室基金课题“西南喀斯特地貌区植被NPP时空演变格局及其影响因素研究”(191851016);国家自然科学基金项目(42061059)
- 摘要 | |
- 访问统计 |
- 参考文献 [38] |
- 相似文献 [20] |
- 引证文献 | |
- 文章评论
[目的] 分析2000—2020年环渤海地区植被NDVI时空演变特征和人口密度变化的冷热点变迁格局，探究环渤海地区植被NDVI对人口密度变化的响应特征，揭示环渤海地区植被NDVI和人口密度重心的迁移轨迹，为该地区植被监测和管理，以及生态环境保护提供理论依据。[方法] 以2000—2020年MODIS NDVI和Population Density时间序列为数据源，采用Theil-Sen Median趋势分析、Mann-Kendall显著性检验、格兰杰因果关系检验、Getis-Ord Gi*分析和重心转移模型等方法。[结果] ①2000—2020年环渤海地区植被NDVI整体呈上升趋势，上升斜率为0.022/10 a，且植被NDVI上升区域面积远大于下降区域面积。2000—2010年植被NDVI上升速率明显高于2010—2020年植被NDVI上升速率。②2000—2020年环渤海地区人口密度变化热点区和冷点区所占比例分别为11.26%和46.84%，人口密度变化以冷点区为主，冷点区主要呈条带状从环渤海地区东北部延伸至西北部，以及山东省东南部部分地区。③环渤海地区人口密度对植被NDVI存在单向格兰杰原因，人口密度的改变是引起植被NDVI变化的格兰杰原因，而植被NDVI的变化不是造成人口密度改变的格兰杰原因。整体上，人口密度的增长对区域植被NDVI的影响主要为负向效应，人口集聚程度越高的区域，植被NDVI下降越显著。④2000—2020年的植被NDVI重心迁移方向无明显空间模式，但总体向西北方向迁移，人口密度重心整体呈东南至西北方向迁移。[结论] 2000—2020环渤海地区植被NDVI整体呈上升趋势。人口密度的增长对植被NDVI变化具有负向影响。综合考虑人口密度变化和气候变化对环渤海地区植被NDVI变化的影响有待进一步研究。
[Objective] The response characteristics of vegetation NDVI to population density change were explored to reveal the migration track of vegetation NDVI and population density center of gravity in the Bohai Rim region, in order to provide a theoretical basis for vegetation monitoring and management and ecological environment protection in the region. [Methods] Based on the MOD13A3 NDVI and population density time series from 2000 to 2020, the methods of Theil-Sen Median analysis, Mann-Kendall significance test, Granger causality test, Getis-Ord Gi* analysis, and center of gravity transfer model were used to study the spatio-temporal variation of vegetation cover and the hotspot variation of population density. [Results] ① from 2000 to 2020, NDVI in the Bohai Rim region showed an upward trend, with an upward slope of 0.022/10 a, and the area of NDVI rising was much larger than that of falling area. The rising rate of NDVI from 2000 to 2010 was significantly higher than that from 2010 to 2020. ② From 2000 to 2020, the proportion of hot spots and cold spots in the change of population density in the Bohai Rim region was 11.26% and 46.84% respectively. The change of population density was mainly in the cold spot region, which mainly extended in strips from the northeast of the Bohai Rim region to the northwest and some areas in the southeast of Shandong Province. ③ There was a one-way Granger cause of population density on NDVI around the Bohai Sea. The change of population density was the Granger cause of the change of NDVI, while the change of NDVI was not the Granger cause of the change of population density. On the whole, the growth of population density mainly had a negative effect on regional NDVI. The higher the degree of population agglomeration, the more significant the decline of NDVI. ④ There was no obvious spatial pattern in the migration direction of NDVI center of gravity of vegetation from 2000 to 2020, but it generally migrated to the northwest, and the center of gravity of population density migrated from the southeast to the northwest. [Conclusion] From 2000 to 2020, the NDVI in the Bohai Rim region shows an upward trend. The increase of population density has a negative impact on the change of NDVI. Further study needs to be conducted considering the impact of population density change and climate change on NDVI change in the Bohai Rim region.
引用本文
徐勇,赵纯,窦世卿,郝文强,郑志威,靖娟利.2000—2020年环渤海地区植被NDVI时空演变及其与人口密度的相关性[J].水土保持通报,2022,42(2):264-274
复制分享
文章指标
- 点击次数:1297
- 下载次数: 12552
- HTML阅读次数: 2495
历史
- 收稿日期:2021-09-22
- 最后修改日期:2021-11-21
- 在线发布日期: 2022-05-26