| 京津冀生态屏障区植被覆盖时空演变驱动力定量解析 |
| 摘要点击 118 全文点击 4 投稿时间：2024-07-06 修订日期：2024-08-26 |
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| 中文关键词 植被覆盖度（FVC） 时空演变 驱动力 人类活动 京津冀生态屏障区 |
| 英文关键词 fractional vegetation cover （FVC） spatial-temporal evolution driving forces human activities Beijing-Tianjin-Hebei ecological barrier area |
| 作者 | 单位 | E-mail | | 庞娇 | 河北农业大学渤海学院, 黄骅 061100 | pangjiao0218@163.com | | 郭欣雨 | 西北农林科技大学资源环境学院, 杨凌 712100 | | | 李晨阳 | 河北农业大学国土资源学院, 保定 071001 | | | 黄雪寒 | 河北农业大学国土资源学院, 保定 071001 | | | 张宇炆 | 河北农业大学国土资源学院, 保定 071001 | | | 单婧 | 河北农业大学现代科技学院, 保定 071001 | | | 苗梓晗 | 河北农业大学现代科技学院, 保定 071001 | | | 苏文格 | 河北农业大学国土资源学院, 保定 071001 | | | 闫丰 | 河北农业大学国土资源学院, 保定 071001 | | | 陈亚恒 | 河北农业大学国土资源学院, 保定 071001 | chenyaheng@126.com |
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| 中文摘要 |
| 太行山-燕山地区是京津冀重要的生态屏障区，其生态保护成效对华北地区的生态安全格局意义重大. 基于2000~2021年长时间序列的植被覆盖度（FVC）数据，采用时空异质性分析和相关性分析等方法，探究太行山-燕山地区植被覆盖度的时空变化特征，厘清了气候因子和人类活动对FVC的驱动机制. 结果表明：①研究区22 a FVC整体呈缓慢波动上升趋势，平均增长率为0.002 2 a-1，FVC增加区域多于稳定和减少区域，特别是在燕山西部和太行山中西部地区存在极显著增长趋势，同时空间上呈现“西北高、东南低”的分布特征. ②研究区FVC与降水呈正相关，与气温呈负相关，且显著性不强；仅有不超过14.00%地区的FVC与气象因子具有较强相关性，其他地区则主要受到非气象因素影响. ③残差与复相关结论互相印证人类活动的重要性. 在改善区与退化区，气候与人类活动共同影响面积占比分别为74.25%和69.75%. 改善区中，人类活动为主要驱动力，占比达80.80%，主要分布在燕山山脉中北部和太行山地区；退化区主要集中于燕山中南部和太行山东部，其中人类主导驱动占比高达76.78%，进一步说明人类活动是太行山-燕山地区FVC时空格局演变的首要驱动力. 研究结果可为后续生态环境保护与修复政策制度建设提供重要参考. |
| 英文摘要 |
| The Taihangshan-Yanshan Region （TYR） is an important ecological barrier region for Beijing-Tianjin-Hebei. The effectiveness of its ecological protection is of great significance to the ecological security pattern of Northern China. In this study， based on the 22 a long time series of fractional vegetation cover （FVC） data from 2000-2021， we explored the spatial and temporal succession process of vegetation cover in the TYR by using methods such as spatio-temporal heterogeneity analysis and correlation analysis and quantitatively separated the contributions of climate change and human activities to the impact of the FVC. The results showed that： ① The FVC in the TYR showed a slowly fluctuating upward trend，with an average growth rate of 0.022 2 a-1. FVC is increasing more than stabilising and decreasing， especially in the western Yanshan and the central and western Taihangshan， with a highly significant increasing trend and a spatial distribution of ‘high in the north-west and low in the south-east”. ② The results of the partial correlation analysis indicated a positive correlation between vegetation cover and precipitation in most areas of the TYR. However， there was a negative correlation with temperature， although it was not statistically significant. The correlation analysis suggested that meteorological factors alone or in combination had limited ability （no more than 14.00%） to influence the evolution of the FVC， so it is likely that other factors were involved. ③ The residual results indicated the significance of anthropogenic factors and supported the compound correlation findings. Climate change and human activities together affected 74.25% and 69.75% of the improved and degraded areas， respectively. The area that had improved due to human activity accounted for 80.80% and was mainly distributed in the north-central TYR. The degraded area was mainly concentrated in the south-central Yanshan and eastern Taihangshan， where the human activity-driven area accounted for as much as 76.78%. The conclusions of the study can provide an important reference for ecological environmental protection and restoration. |
