欢迎访问《生态学杂志》官方网站,今天是 分享到:

生态学杂志

• 研究报告 • 上一篇    下一篇

2000—2017年甘肃省生态环境质量时空演变格局及其影响因素

宋媛,石惠春*,谢敏慧,赵鹏霞   

  1. (西北师范大学地理与环境科学学院, 兰州 730070)
  • 出版日期:2019-12-10 发布日期:2019-12-10

Spatiotemporal evolution pattern and influencing factors of eco-environmental quality in Gansu from 2000 to 2017.

SONG Yuan, SHI Hui-chun*, XIE Min-hui, ZHAO Peng-xia   

  1. (College of Geographical and Environmental Science, Northwest Normal University, Lanzhou 730070, China).
  • Online:2019-12-10 Published:2019-12-10

摘要: 以生态环境较为脆弱的甘肃省为研究区,基于RS和GIS,从自然因素和人为因素两个方面,选取11个指标,运用空间主成分分析法构建生态环境质量指数,对甘肃省生态环境质量时空分布特征及其影响因素进行了分析。结果表明:从甘肃省生态环境质量空间分布特征来看,2000和2017年的生态环境质量在空间分布上存在一定的两极分化现象,生态环境质量等级为差、较差等级主要集中在甘肃省西北地区,而生态环境质量等级为良、优等级主要集中在甘肃省东南地区;从甘肃省生态环境质量时间演变格局来看,17年间生态环境质量整体上呈现有所好转的趋势;从甘肃省生态环境质量影响因素来看,总体上气候条件、植被覆盖、土地利用方式和土壤基质等因素的影响作用占据主导地位,而人口经济、地形地貌和水文环境等因素的影响作用较弱。

关键词: 比根呼吸, 非结构性碳水化合物, 隔离降水, 细根

Abstract: With RS and GIS, spatial principal component analysis was used to construct the eco-environmental quality index of Gansu, a region with relatively fragile eco-environment, by selecting 11 indicators including natural and anthropogenic factors. The spatiotemporal distribution and influencing factors of eco-environmental quality were analyzed. The results showed that eco-environmental quality in 2000 and 2017 showed a polarization phenomenon in term of spatial distribution. The areas with poor and fair grades of eco-environmental quality were mainly concentrated in northwest Gansu, while the areas with good and excellent grades of eco-environmental quality were mainly concentrated in southeast Gansu. Temporally, there was a trend of improvement for eco-environmental quality in the past 17 years. Generally, climate, vegetation cover, land use type, and soil matrix were dominant factors affecting eco-environmental quality, while the role of population economy, landform and hydrological environment were relatively minor.

Key words: precipitation exclusion, specific root respiration, nonstructural carbohydrate., fine root