京津冀植被退化的空间格局及人为驱动因素分析

发布时间：2018-05-08 19:28

本文选题：京津冀 + 植被退化　；参考：《生态与农村环境学报》2017年05期

【摘要】：植被净初级生产力(NPP)是区域生态系统健康与退化的重要指示器之一。基于2000—2010年NPP数据和土地利用数据,采用趋势分析、叠加分析和显著性检验等方法,研究京津冀植被退化的空间格局,并分析其人为驱动因素。结果表明:(1)研究区植被NPP多年均值(以C计)集中在400~700 g·m~(-2)·a~(-1),高值区主要分布在燕山山脉、太行山山脉及太行山山脉东麓山前平原,低值区主要分布在冀西北草原区、研究区东部沿海地带和冀东平原盐碱地地区。(2)11 a间京津冀植被NPP呈减少趋势的区域面积占研究区总面积的59.214%,其中,显著和极显著减少区域面积占10.050%,研究区局部区域植被发生明显退化;京津冀区域植被退化总面积为21 545.07km~2,其中,重度退化面积为5 775.66 km~2,中度退化面积为8 168.18 km~2,轻度退化面积为7 601.23 km~2;研究区植被退化表现出明显的空间聚集特征,一是太行山东麓呈条带状连片区域,二是京津唐都市圈呈环状区域。(3)京津冀区域植被退化格局主要人文驱动因素有3个:一是城市(镇)蔓延式扩张,研究区城市新增建成区面积与重度、中度、轻度退化面积之间的相关系数分别为0.897 9、0.783 5和0.686 9(P0.05);二是区域交通路网密度影响区域植被退化格局和程度,以重要交通线为核心,从核心到两翼,植被退化程度逐渐降低;三是区域经济发展战略和产业布局直接影响区域植被空间格局。
[Abstract]:NPP is one of the important indicators of regional ecosystem health and degradation. Based on NPP data and land use data from 2000 to 2010, the spatial pattern of vegetation degradation in Beijing, Tianjin and Hebei was studied by using trend analysis, superposition analysis and significance test. The results show that the vegetation NPP multiannual mean value (expressed as C) in the study area is 400 ~ 700g / m ~ (-1) ~ (-1) ~ (-1), the high value area is mainly distributed in the Yanshan Mountains, the Taihang Mountain range and the eastern Piedmont plain of the Taihang Mountain Mountains, and the low value area is mainly distributed in the northwest of Hebei Province. In the eastern coastal zone of the study area and the saline-alkali area of the eastern Hebei plain, the area where the NPP of the Beijing-Tianjin-Hebei vegetation is decreasing in the past 11 years accounts for 59.214 of the total area of the study area, in which, Significant and extremely significant reduction of regional area accounted for 10.050, and vegetation degradation occurred in some regions of the study area, and the total area of vegetation degradation in Beijing-Tianjin-Hebei region was 21,545.07km2, among which, The serious degraded area is 5 775.66 km / m ~ (2), the moderate degraded area is 8 168.18 km / m ~ (2), and the light degraded area is 7 601.23 km / m ~ (2). The vegetation degradation in the study area shows obvious spatial agglomeration, one is the belt connected area in the east foot of Taihang Mountain, Second, the Beijing-Tianjin-Tangshan Metropolitan Circle is an annular region. (3) the main human driving factors of vegetation degradation pattern in the Beijing-Tianjin-Hebei region are as follows: first, the urban (town) spreading expansion, the newly built area and the heavy area of the city in the study area are moderate. The correlation coefficient between light degraded area is 0.897 ~ 0.783 5 and 0.686 9 ~ (9) P _ (0.05) respectively, the second is that the density of regional traffic network affects the pattern and degree of regional vegetation degradation, with the important traffic line as the core, the degree of vegetation degradation decreases gradually from the core to the two wings. Third, regional economic development strategy and industrial layout directly affect the spatial pattern of regional vegetation.
【作者单位】：河北师范大学资源与环境科学学院/河北省环境演变与生态建设重点实验室;河北师范大学旅游系;环境保护部南京环境科学研究所;中国环境科学研究院;
【基金】：国家社会科学基金(15BJY026)
【分类号】：Q948

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