LIANG Cheng,SU Huimin,ZHANG Yilin,et al.Spatiotemporal Changes and Influencing Factors of Net Primary Productivity of Guanzhong Plain City Cluster from 2000 to 2019[J].Research of Soil and Water Conservation,2023,30(04):293-300.[doi:10.13869/j.cnki.rswc.2023.04.034.]
2000—2019年关中平原城市群植被NPP时空变化及影响因素
- Title:
- Spatiotemporal Changes and Influencing Factors of Net Primary Productivity of Guanzhong Plain City Cluster from 2000 to 2019
- 文章编号:
- 1005-3409(2023)04-0293-08
- Keywords:
- vegetation NPP; spatiotemporal changes; Geodetector
- 分类号:
- Q948
- 文献标志码:
- A
- 摘要:
- [目的]分析和探讨关中平原城市群植被NPP的时空变化特征,揭示影响植被NPP变化的主要因素,为区域生态恢复及生态健康评估提供支持。[方法]运用趋势分析、变异系数和地理探测器等方法,分析了2000—2019年关中平原城市群植被NPP的时空变化特征与规律,并对植被NPP的影响因素进行了探测。[结果]关中平原城市群年均植被NPP值介于340.3～573.5 g C/m2,年均增长率为9.1 g C/m2,整体呈波动上升趋势,且不同地貌区NPP增长趋势相似。大部分区域植被NPP变化速率大于0,且变异系数较小,植被NPP以小幅增加为主。空间上,植被NPP南高北低,西高东低,具有明显空间分异性,是自然、社会因素共同作用的结果。植被NPP的主要影响因素为降水、地貌及≥10℃积温,但因子间的复杂耦合作用对植被NPP的影响更为显著,如降水与气温的交互作用对植被NPP的解释力达到57%以上,探测结果表明两两因子的交互作用呈现相互增强效应。[结论]关中平原城市群大部分地区植被NPP有明显增长,表明区域生态环境有较大改善。
- Abstract:
- [Objective] The aim of this study is to analyze and investigate the temporal and spatial variation characteristics of vegetation NPP in Guanzhong Plain city cluster, to reveal the main factors affecting vegetation NPP change, and to provide support for regional ecological restoration and ecological health assessment. [Methods] Trend analysis, correlation analysis and geographic detectors were used to analyze the characteristics and patterns of the temporal and spatial changes of vegetation NPP in the Guanzhong Plain city cluster from 2000 to 2019, and probe the influence factors of NPP. [Results] The average annual vegetation NPP of the Guanzhong Plain city cluster was between 340.3～573.5 g C/m2, and the average annual growth rate was 9.1 g C/m2. The overall trend was fluctuating and rising, and the NPP growth trend was similar in different geomorphic areas. In most areas, the vegetation NPP change rate was greater than 0, and the coefficient of variation was small. The vegetation NPP mainly increased slightly. Spatially, the vegetation NPP was high in the south and low in the north, high in the west and low in the east. It had obvious spatial differentiation and was the result of the combined effect of natural and social factors. The main influencing factors on vegetation NPP were precipitation, geomorphic types and ≥10℃ accumulated temperature, but the complex coupling between factors had a more significant impact on vegetation NPP. For example, the interaction between precipitation and temperature could explain more than 57% of vegetation NPP. The detection results showed that the interaction between the two factors presented a mutually reinforcing effect. [Conclusions] In most areas of Guanzhong Plain city cluster, vegetation NPP increased significantly, indicating that the regional ecological environment has been greatly improved.
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备注/Memo
收稿日期:2021-11-17 修回日期:2021-12-29
资助项目:国家自然科学基金(42077071,41871187)
第一作者:梁程(1993—),男,四川绵阳人,硕士研究生,研究方向为生态系统服务。E-mail:cccheng_liang@163.com
通信作者:苏惠敏(1972—),女,陕西韩城人,博士,副教授,主要从事土地利用及生态系统研究。E-mail:suhm@snnu.edu.cn