| 引用本文： |
-
邓雁菲,胡宝清,冯炳斌,张泽.2000-2015年广西北部湾植被NDVI时空演变及因子探测[J].广西科学院学报,2021,37(4):389-400. [点击复制]
- DENG Yanfei,HU Baoqing,FENG Bingbin,ZHANG Ze.Spatial-temporal Evolution and Factor Detection of Vegetation NDVI in Beibu Gulf of Guangxi From 2000 to 2015[J].Journal of Guangxi Academy of Sciences,2021,37(4):389-400. [点击复制]
|
|
| 摘要: |
| 为探测广西北部湾归一化植被指数（Normalized Differential Vegetation Index，NDVI）的时空演变格局及其影响机制，本研究运用一元线性回归法、变异系数法和地理探测器分析等方法探究2000-2015年广西北部湾植被NDVI变化特性及其驱动机制。结果表明：（1）2000-2015年研究区植被覆盖状况良好，植被NDVI年均值为0.753，夏季和秋季多，春季和冬季少，呈缓慢上升的趋势；植被覆盖类型以中高级分类为主，面积占比超过60％，多分布在高山地区，中、中低级植被覆盖类型占比小，主要分布于沿海地区；（2）植被NDVI的稳定性存在明显地域差异，变异系数均值为3.9%，变异稳定区面积占比为48.55%，不稳定区占比为45.34%；（3）地理探测器探测发现气温是植被NDVI的主要解释因子，人为因子的解释力波动上升；因子两两交互作用后能增强单因子解释力，且存在线性与非线性两种协同效应；同因子中不同的分类对植被NDVI的影响不同，适度的分类等级范围能促进植被NDVI的增加。 |
| 关键词: 广西北部湾 因子探测 NDVI 地理探测器 时空演变 |
| DOI：10.13657/j.cnki.gxkxyxb.20210805.002 |
| 投稿时间：2021-06-10 |
| 基金项目:广西创新研究团队项目“北部湾海陆交互关键带与陆海统筹发展研究（2016GXNSFGA380007）”资助。 |
|
| Spatial-temporal Evolution and Factor Detection of Vegetation NDVI in Beibu Gulf of Guangxi From 2000 to 2015 |
|
DENG Yanfei1,2, HU Baoqing1, FENG Bingbin1,2, ZHANG Ze1,2
|
| (1.Key Laboratory of Beibu Gulf Environmental Change and Resource Use, Ministry of Education, Nanning, Guangxi, 530001, China;2.College of Geography and Planning, Nanning Normal University, Nanning, Guangxi, 530001, China) |
| Abstract: |
| In order to detect the pattern of the temporal and spatial evolution and its influence mechanism of the Normalized Difference Vegetation Index (NDVI) in Beibu Gulf of Guangxi,the methods of monistic linear regression,coefficient of variation and geo-detector analysis are used to explore the change characteristics and driving mechanism of vegetation NDVI in Beibu Gulf of Guangxi from 2000 to 2015.The results showed that: (1) The vegetation cover in the study area was in good condition from 2000 to 2015.The annual average NDVI of vegetation was 0.753,with more in summer and autumn,and less in spring and winter,showing a slow upward trend.Vegetation cover type was mainly in the middle and high-level classification,the area proportion was more than 60%,and more distributed in alpine areas,medium and low-level vegetation cover type accounted for small,mainly distributed in coastal areas.(2) There were obvious regional differences in the stability of vegetation NDVI.The mean value of variation coefficient was 3.9%,and the proportion of variation stable area was 48.55%.The coefficient of variation was 3.9% in average; the area of variation stabilization is 48.55%,and the proportion of unstable area was 45.34%.(3) Geodesy detector detection found that temperature was the main explanatory factor of vegetation NDVI,and the explanatory force of human factors fluctuated upward.The single-factor explanatory force could be enhanced after the interaction between the two factors,there were linear and nonlinear synergistic effects.Different classifications in the same factor had different effects on vegetation NDVI,and moderate classification range could promote the increase of vegetation NDVI. |
| Key words: Beibu Gulf of Guangxi factor detection NDVI geographic detector spatial-temporal evolution |
