|
| 黄河流域甘青段生境质量时空特征及其地形梯度效应 |
| Temporal and spatial characteristics of habitat quality and its topographic gradient effect in the Gansu-Qinghai section of the Yellow River basin |
| 投稿时间：2022-04-20 |
| DOI：10.13254/j.jare.2022.0216 |
| 中文关键词: 生境质量，InVEST模型，地形梯度，黄河流域甘青段 |
| 英文关键词: habitat quality, InVEST model, topographic gradient, Gansu-Qinghai section of the Yellow River basin |
| 基金项目:甘肃省教育厅高等学校科研项目（2019A-046）；甘肃农业大学公招博士科研启动基金项目（GAU-KYQD-2017-34） |
|
| 摘要点击次数: 1887 |
| 全文下载次数: 2154 |
| 中文摘要: |
| 区域生境质量是生态系统服务功能和生态系统健康程度的重要体现，明确不同地形梯度下黄河流域甘青段生境质量变化量的增益减损，对该地区经济发展和生态保护的“双赢”政策具有重大意义。本研究运用InVEST模型评估了1990、2000、2010年和2020年黄河流域甘青段生境质量的时空变化以及不同地形梯度下生境质量的增益减损情况。结果表明： 1990、2000、2010、2020年黄河流域甘青段年均生境质量指数分别为0.775、0.774、0.774、0.778，呈先小幅下降继而显著上升趋势，空间上呈“东西增强、中部减弱”的态势，且增益面积大于减损面积。1990、2000、2010、2020年区域生境退化度指数分别为0.015 14、0.015 23、0.015 24、0.014 78，呈先小幅上升继而明显下降的趋势，空间上表现为生境退化区面积高于生境优化区面积，退化区集中在甘肃省。黄河流域甘青段生境质量总体表现为在地形梯度最低等级（Ⅰ级）时最差，最高等级（Ⅴ级）时最好，其中高程为Ⅲ级时最高，坡度为Ⅳ级时最高。除高程外，黄河流域甘青段生境质量在各地形梯度下总体表现为Ⅰ级时增益最优，Ⅴ级时减损最大，其中在坡度Ⅴ级时处于完全减损状态。生境质量的时空特征及地形梯度效应可为黄河流域甘青段生态保护政策的制定和生态修复工程的实施提供科学依据。 |
| 英文摘要: |
| Regional habitat quality is an important reflection of ecosystem service functions and ecosystem health. It is important to clarify the gain and loss of habitat quality in the Gansu-Qinghai section of the Yellow River basin under different terrain gradients, as this is of great significance to the "win-win" policy of economic development and ecological protection in the region. In this study, the InVEST model was used to evaluate temporal and spatial changes in habitat quality in the Gansu-Qinghai section of the Yellow River basin in 1990, 2000, 2010, and 2020, as well as the gain and loss of habitat quality under different topographic gradients. The results showed that, in the past 30 years, the annual average habitat quality in the Gansu-Qinghai section of the Yellow River basin was 0.775, 0.774, 0.774, and 0.778, showing a slight decline and then a significant upward trend. Spatially, it showed a trend of strengthening from east to west and weakening in the middle, and the area with improvement was greater than the area with decreased quality. In the past 30 years, the regional average annual habitat degradation degrees were 0.015 14, 0.015 23, 0.015 24, and 0.014 78, showing a slight upward and then a significant downward trend. Spatially, the deteriorated habitat area was larger than the improved habitat area, and the deteriorated areas were concentrated in Gansu Province. The habitat quality in the Gansu-Qinghai section of the Yellow River basin is the worst when the terrain gradient is of the lowest grade (gradeⅠ) and the best when the topographic gradient is of the highest grade (grade Ⅴ). Except for the elevation, the habitat quality in the Gansu-Qinghai section of the Yellow River basin has the largest improvement when the topographic gradient is grade Ⅰ, the loss is the largest when the gradient is grade Ⅴ, and it is completely degraded when the gradient is grade Ⅴ. Temporal and spatial characteristics of habitat quality and topographic gradient effects can provide a scientific basis for policy formulation and implementation of ecological restoration projects in the Gansu-Qinghai section of the Yellow River basin. |
| HTML
查看全文
查看/发表评论 下载PDF阅读器 |
| 关闭 |
|
|
|
