欢迎访问《应用生态学报》官方网站,今天是 分享到:

应用生态学报 ›› 2023, Vol. 34 ›› Issue (10): 2713-2722.doi: 10.13287/j.1001-9332.202310.005

• • 上一篇    下一篇

内蒙古草原区植被覆盖度时空演变及其驱动力

奎国娴1, 史常青1,2,3*, 杨建英1,2, 李瑞鹏1, 魏广阔1, 刘佳琪1   

  1. 1北京林业大学水土保持学院, 北京 100083;
    2北京林业大学林业生态工程教育部工程研究中心, 北京 100083;
    3林木资源高效生产全国重点实验室, 北京 100083
  • 收稿日期:2023-05-05 接受日期:2023-08-24 出版日期:2023-10-15 发布日期:2024-04-15
  • 通讯作者: * E-mail: scqbj@163.com
  • 作者简介:奎国娴, 女, 1995年生, 硕士研究生。主要从事矿山生态修复研究。E-mail: 2256398841@qq.com
  • 基金资助:
    西北干旱荒漠区煤炭基地生态安全保障技术项目(2017YFC0504400)和内蒙古自治区科技重大专项(2020ZD002103)

Spatial-temporal variations of vegetation coverage and its driving force in Inner Mongolia grassland, China

KUI Guoxian1, SHI Changqing1,2,3*, YANG Jianying1,2, LI Ruipeng1, WEI Guangkuo1, LIU Jiaqi1   

  1. 1School of Soil and Water Conservation, Beijing Forestry University, Beijing 100083, China;
    2Forestry Ecological Enginee-ring Research Center of Ministry of Education, Beijing Forestry University, Beijing 100083, China;
    3Statel Key Laboratory of Efficient Production of Forest Resources, Beijing 100083, China
  • Received:2023-05-05 Accepted:2023-08-24 Online:2023-10-15 Published:2024-04-15

摘要: 内蒙古草原具有丰富的自然植被和矿产资源。本研究基于Landsat5/7/8 NDVI数据,采用像元二分模型反演植被覆盖度,通过Sen+MK和Hurst指数对内蒙古草原区植被覆盖度的稳定性、空间分布和未来演变趋势进行研究,并使用最优参数地理探测器分析植被覆盖度空间分异的驱动因素。结果表明:从植被覆盖特征来看,2006—2020年内蒙古草原区植被覆盖度呈增长趋势,整体呈现东高西低的空间格局,以高波动为主,植被具有轻微或明显改善特征的区域(64.8%)远多于轻微或严重退化特征的区域(23.2%)。与过去15年相比,未来植被退化区域的面积占比预计将增加至36.6%,中部草原区的锡林郭勒盟和乌兰察布中部、东部草原区呼伦贝尔的西部和鄂尔多斯市的西部以及西部草原区乌海都有退化风险,应重点关注。从驱动因素来看,降水是内蒙古草原区空间分异性的主导因素,其与土壤类型、土地利用和气温3个因子的协同作用最显著。

关键词: 植被覆盖度, 内蒙古草原区, 最优参数地理探测器, 时空演变, 驱动力

Abstract: Inner Mongolia grassland is rich in natural vegetation and mineral resources. Based on Landsat5/7/8 NDVI data, we used pixel binary model to invert vegetation coverage of Inner Mongolia grassland area, investigated the stability, spatial distribution, and future evolution trend of vegetation coverage by using Sen+MK and Hurst index, and analyzed the driving factors of the spatial differentiation of vegetation coverage by the optimal parameters-based geographical detector. The results showed that vegetation coverage of Inner Mongolia grassland showed an increasing trend from 2006 to 2020, and the overall spatial pattern was high in the east and low in the west, mainly with great fluctuation. The regions with slight or obvious improvement characteristics (64.8%) were much more than those with slight or severe degradation characteristics (23.2%). Compared with that in the past 15 years, the proportion of degraded vegetation in the future is expected to increase to 36.6%. The central part of Xilin Gol League and Wulanqab in the central grassland area, the western part of Hulunbuir and Erdos in the eastern grassland area, and Wuhai in the western grassland area were at the risk of degradation, which should be paid more attention. Precipitation was the dominant factor of spatial differentiation in Inner Mongolia grassland, while soil type, land use, and air temperature had the most significant synergistic effect.

Key words: vegetation coverage, Inner Mongolia grassland, optimal parameters-based geographical detector, spatio-temporal evolution, driving force