WANG Bowei,WANG Weijia,YANG Jie,et al.Temporal and Spatial Pattern Change of Net Primary Productivity of Vegetation in Chengdu Plain Economic Zone and Influencing Factors in the Last Decade[J].Journal of Chengdu University of Information Technology,2021,36(03):323-329.[doi:10.16836/j.cnki.jcuit.2021.03.014]
近十年成都平原经济区植被净初级生产力时空格局变化及其影响因子
- Title:
- Temporal and Spatial Pattern Change of Net Primary Productivity of Vegetation in Chengdu Plain Economic Zone and Influencing Factors in the Last Decade
- 文章编号:
- 2096-1618(2021)03-0323-07
- Keywords:
- meteorological application; ecological remote sensing; NPP; impact factor; Chengdu Plain Economic Zone; temporal and spatial variation
- 分类号:
- S718.556
- 文献标志码:
- A
- 摘要:
- 针对全面且定量化地掌握成都平原经济区植被生态系统状况,为区域生态环境管治提供科学理论依据,利用MODIS(moderate-resolution imaging spectroradiometer)净初级生产力(net primary productivity,NPP)数据产品,结合趋势分析、相关性分析等方法,剖析NPP的时空变化和变异特征,并讨论自然地理要素(气候、地形、土地利用、土壤、植被)等对NPP的影响。结果表明:成都平原经济区NPP空间格局差异明显,总体呈现自东向西递增的趋势。近十年成都平原经济区年表现为正向变化趋势,NPP年均值为619.24 g C·m-2·a-1(年均单位面积内固定的碳C的克数g)。受城市群影响较大的盆地地区生态情况得到极大改善,NPP显著上升,而湿地的生态状况改善有待时日。从气候角度看,NPP的积累主要受到温度的影响,但是其变化更受降水的调控。同时,复杂的地形反而能给植被提供更好的生长环境。土壤的肥力、植被的群落结构和年龄也直接影响植被的干物质积累能力,人类的干扰也隐含其中。生态建设政策的实施和自然地理要素的变化能综合调控NPP的变化,还能维持成都平原经济区碳库的相对稳定。大气和植被生态系统之间存在双向反馈关系。
- Abstract:
- In view of comprehensively and quantificationally mastering the status of vegetation ecosystem in Chengdu Plain Economic Zone, providing scientific theoretical basis for regional ecological environment management, we use MODIS(Modern-resolution Imaging Spectroradiometer)net primary productivity(Net Primary Productivities, NPP)data products, combined with trend analysis, correlation analysis, to analyze the temporal and spatial changes and variation characteristics of NPP, and discuss the impact of natural geographic elements(climate, terrain, land use, soil, vegetation type)on NPP. The results show that the spatial pattern of NPP in Chengdu Plain Economic Zone is obviously different, and it has a increasing trend from east to west. In last decade, Chengdu Plain Economic Zone shows a positive trend, with an average annual NPP value of 619.24 g C·m-2·A-1(grams of fixed carbon per unit area per year). The ecological situation of the basin area which is greatly affected by the urban agglomeration has been greatly improved, NPP has increased significantly, the improvement of wetland ecological situation still needs time. From the perspective of climate, the accumulation of NPP is mainly affected by temperature, but its change is more regulated by precipitation. At the same time, complex terrain can provide better growth environment for vegetation. Soil fertility,vegetation community structure and age also directly affect the dry matter accumulation ability of vegetation, and human interference is also implied. The implementation of ecological construction policy and the change of natural geographical factors can comprehensively control the change of NPP and maintain the relative stability of carbon pool in Chengdu Plain Economic Zone. There is a two-way feedback relationship between atmosphere and vegetation ecosystem.
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备注/Memo
收稿日期:2020-05-03
基金项目:四川省科技计划资助项目(2019YJ0621); 高原与盆地暴雨旱涝灾害四川省重点实验室科技发展基金资助项目(SCQXKJQN2019022)