内蒙古河套灌区所在流域植被NPP时空动态特征及其驱动力分析 |
摘要点击 137 全文点击 9 投稿时间:2024-05-30 修订日期:2024-08-21 |
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中文关键词 河套灌区 净初级生产力(NPP) 空间分异 驱动机制 地理探测器 |
英文关键词 Hetao Irrigation District net primary productivity(NPP) spatial differentiation driving mechanism geographical detector |
作者 | 单位 | E-mail | 籍健勋 | 内蒙古农业大学水利与土木建筑工程学院, 呼和浩特 010018 | jjx550935463@163.com | 童新 | 内蒙古农业大学水利与土木建筑工程学院, 呼和浩特 010018 内蒙古自治区生态水文与水资源高效利用重点实验室, 呼和浩特 010018 黄河流域内蒙段水资源与水环境综合治理协同创新中心, 呼和浩特 010018 | xintong@imau.edu.cn | 段利民 | 内蒙古农业大学水利与土木建筑工程学院, 呼和浩特 010018 内蒙古自治区生态水文与水资源高效利用重点实验室, 呼和浩特 010018 黄河流域内蒙段水资源与水环境综合治理协同创新中心, 呼和浩特 010018 | | 刘小燕 | 内蒙古农业大学水利与土木建筑工程学院, 呼和浩特 010018 内蒙古自治区生态水文与水资源高效利用重点实验室, 呼和浩特 010018 黄河流域内蒙段水资源与水环境综合治理协同创新中心, 呼和浩特 010018 | liuxy6675@163.com | 巩钰 | 内蒙古农业大学水利与土木建筑工程学院, 呼和浩特 010018 内蒙古自治区生态水文与水资源高效利用重点实验室, 呼和浩特 010018 黄河流域内蒙段水资源与水环境综合治理协同创新中心, 呼和浩特 010018 | | 刘廷玺 | 内蒙古农业大学水利与土木建筑工程学院, 呼和浩特 010018 内蒙古自治区生态水文与水资源高效利用重点实验室, 呼和浩特 010018 黄河流域内蒙段水资源与水环境综合治理协同创新中心, 呼和浩特 010018 | |
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中文摘要 |
植被净初级生产力(NPP)是生态环境质量评价的关键指标,识别并分析植被NPP动态特征及其驱动力是实现区域生态可持续发展的前提. 利用趋势分析、Hurst指数和稳定性分析,明晰内蒙古河套灌区所在流域植被NPP变化格局,通过地理探测器定量识别不同区域内植被NPP空间异质性的主导驱动因子. 结果表明:①2001~2020年间全流域植被NPP年均值(以C计)为139.14 g·(m2·a)-1,整体呈波动增加趋势(P<0.05),年际增加速率(以C计)为2.06 g·(m2·a)-1. 灌区内外植被NPP也均表现为改善态势. ②空间上,植被NPP整体呈灌区内高、灌区外低的分布特征,其中63.51%的区域植被NPP显著增加,多集中在灌区西部及外围区域. ③植被NPP的平均变异系数为0.17,主要呈现低波动和较低波动变化,且未来反持续变化趋势明显强于持续变化趋势. ④土地利用类型是影响全流域及灌区内外植被NPP空间分布的第一主导因子,气温、降水则对灌区内植被NPP变化的解释力相对较强,各驱动因子的影响在灌区内外差异性明显. 在不同自然地理单元、生态系统类型、气象水文条件以及人类活动的影响下,内蒙古河套灌区所在流域植被NPP时空分异特征及其驱动机制均表现出明显的空间异质性,未来应因地制宜开展生态建设工程,加强流域生态环境综合治理与系统保护力度,持续推动黄河流域生态保护与高质量发展. |
英文摘要 |
Vegetation net primary productivity (NPP) is a key indicator for the evaluation of ecological environment quality. Identifying and analyzing the dynamic characteristics and driving forces of vegetation NPP is a prerequisite for achieving regional environmentally sustainable development. Trend analysis, Hurst index, and stability analysis were used to elucidate the changing pattern of vegetation NPP in the basin of Hetao Irrigation District in Inner Mongolia. Furthermore, the dominant driving factors of spatial heterogeneity of vegetation NPP in different regions were quantitatively identified by geographical detector. The results showed that the annual mean (C) of vegetation NPP in the whole basin from 2001 to 2020 was 139.14 g·(m2·a)-1, showing a fluctuating increasing trend, and the interannual increase rate (C) was 2.06 g·(m2·a)-1 (P< 0.05). The NPP of vegetation inside and outside the irrigation area also improved. Spatially, the NPP of vegetation was generally high in the irrigation area and low outside the irrigation area. Among them, 63.51 % of the regional vegetation NPP increased significantly, mostly concentrated in the western and peripheral regions of the irrigation area. The average coefficient of variation of vegetation NPP was 0.17, which primarily showed low fluctuation, and the future anti-continuous change trend was significantly stronger than the continuous change trend. Land use type was the first dominant factor affecting the spatial distribution of vegetation NPP in the whole basin and inside and outside the irrigation area. Temperature and precipitation had relatively strong explanatory power for the change of vegetation NPP in the irrigation area, and the influence of each driving factor was obvious inside and outside the irrigation area. Under the influence of different natural geographical units, ecosystem types, meteorological and hydrological conditions, and human activities, the spatial and temporal differentiation characteristics of vegetation NPP and its driving mechanism in the Hetao Irrigation District of Inner Mongolia showed obvious spatial heterogeneity. In the future, ecological construction projects should be carried out according to local conditions, and the comprehensive management and system protection of the ecological environment of the basin should be strengthened to continuously promote the ecological protection and high-quality development of the Yellow River Basin. |