| 杨旺彬,王钰.广西植被覆盖时空演化及对气候和土地利用变化的响应[J].林业调查规划,2026,51(1):147-152 |
| 广西植被覆盖时空演化及对气候和土地利用变化的响应 |
| Spatio-temporal Evolution of Vegetation Coverage and Its Response to Climate and Land Use Changes in Guangxi |
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| DOI： |
| 中文关键词: 植被覆盖 时空演化 气候响应 归一化植被指数(NDVI) 广西 |
| 英文关键词: vegetation coverage spatio - temporal evolution climate response normalized difference
vegetation index (NDVI) Guangxi |
| 基金项目: |
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| 摘要点击次数: 515 |
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| 中文摘要: |
| 植被覆盖是生态环境质量的指示因子之一,科学揭示其时空变化特征和响应机制,对区域生
态修复与治理有一定的参考价值。 基于归一化植被指数(NDVI),采用 Sen+Mann-Kendall 趋势分析法,探究广西2001—2020 年植被覆盖时空演化特征,并借助偏相关分析、残差分析等方法,解析
NDVI 对气候和土地利用变化的响应关系。结果表明,20 年间,NDVI 值波动增加,41.11%的区域
植被呈改善趋势,仅2.58%的区域植被呈退化趋势;气温和降水两因子与植被 NDVI 值均为正相关关系,降水对植被的影响呈明显的空间异质性;人类活动对区域植被覆盖具有正负效应,新增耕地和林地改善植被覆盖状况,建设占用对城镇周边植被有破坏作用。广西作为我国南方重要的生态
屏障,在气候与人类活动的共同影响下,植被覆盖状况持续改善,说明近 20 年退耕还林和石漠化治理成效显著。 |
| 英文摘要: |
| Vegetation coverage is an indicator of ecological environment quality. Scientifically revealing
the spatio-temporal variation characteristics of vegetation coverage and response mechanisms holds reference value for regional ecological restoration and management. Based on the normalized difference vegetation index (NDVI), the spatio -temporal evolution characteristics of vegetation cover in Guangxi from
2001 to 2020 were analyzed using Sen+Mann-Kendall trend analysis method, and the response relationship of NDVI to climate and land use change was analyzed by using the methods of partial correlation analysis and residual analysis. The result showed that during the past 20 years, the NDVI of Guangxi
showed a fluctuating growth trend, with the area of increasing vegetation coverage accounting for 41.11%,
while only 2.58% of the regional vegetation showed a degradation trend. The fractional vegetation coverwas positively associated with both precipitation and temperature, and the impact of precipitation on vegetation showed significant spatial heterogeneity. Human activities had a positive and negative effect on regional vegetation coverage, increasing farmland land and forest land to improve vegetation coverage, and
construction occupation had a destructive effect on vegetation around cities and towns. As an important
ecological barrier in southern China, the vegetation coverage in Guangxi has continuously improved under
the combined influence of climate and human activities, indicating significant achievements in the Grain
for Green Program and rocky desertification control in the past 20 years. |
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