基于土地利用覆被变化（LUCC）的人类活动与流域生物多样性灰色关联分析
收稿日期: 2021-03-31
修回日期: 2021-06-30
网络出版日期: 2021-11-29
基金资助
国家自然科学基金资助项目(41771576);陕西省自然科学基础研究计划资助项目(2018JM4010);西安科技大学博士启动金项目(2017QDJ040)
Grey correlation analysis of human activities and watershed biodiversity based on land use and cover change
Received date: 2021-03-31
Revised date: 2021-06-30
Online published: 2021-11-29
以黄土高原中部的泾河流域为研究区,通过采用结合InVEST（Integrated Valuation of Ecosystem Services and Tradeoffs）模型生境质量与植被覆盖度的综合方法,分析植物多样性在栅格尺度上的时空变化,并结合灰色关联分析方法,分析植物多样性与土地利用强度、人口密度等因子的关联关系。结果表明：（1） 泾河流域植物多样性处于中等水平（BS>0.53）,空间格局变化明显。2000—2015年,流域内植物多样性平均值从0.5382增加到0.5951,其中,植物多样性高值区域占总面积的22.1%,主要分布在山地、国家自然保护区和林业地区,植物多样性低值区占总面积的5.99%,主要分布在城区及北部植被覆盖低区域。（2） 土地利用强度是流域植物多样性的主要影响因素,其次太阳辐射和人口密度也会造成较大影响,此外还受其他因素的共同作用。
孙彦旭,周自翔,米朝娟 . 基于土地利用覆被变化（LUCC）的人类活动与流域生物多样性灰色关联分析[J]. 干旱区研究, 2021 , 38(6) : 1782 -1792 . DOI: 10.13866/j.azr.2021.06.30
Studies on the relationship between human activities and biodiversity in the Loess Plateau can provide a scientific basis for ecological restoration and biodiversity conservation. For example, in the Jinghe River Basin in the middle part of the Loess Plateau, biodiversity is rich, but problems such as a fragile ecological environment exist. Although studies have been addressing such issues, effective methods for assessing medium-or large-scale biodiversity changes are lacking because of insufficient basic data and coexistence of multiple habitat types. In this study, a comprehensive method combining a model of Integrated Valuation of Ecosystem Services and Tradeoffs on habitat quality and vegetation coverage was used to analyze the spatiotemporal changes in plant diversity on a grid scale. Gray correlation analysis was also performed to analyze the relationship of plant diversity, land use intensity, population density, and other factors. Results show that (1) the level of plant diversity in the Jinghe River Basin was moderate (BS>0.53), and the spatial pattern changed significantly. The average plant diversity in the basin increased from 0.5382 in 2000 to 0.5951 in 2015. Areas with a high plant diversity accounted for 22.1% of the total area, and they were mainly distributed in mountainous areas, national nature reserves, and forestry areas. By comparison, areas with a low plant diversity accounted for 5.99% of the total area, and they were mostly distributed in urban areas and areas with low vegetation coverage in the north of the basin. (2) Plant diversity is influenced by many factors, but it is mainly affected by land use intensity, followed by solar radiation and population density. This study can provide additional information about the basin and a basis for developing biodiversity conservation policies and managing human activities.
Key words： biodiversity; LUCC; vegetation coverage; grey relational degree; Jinghe River Basin
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