| 中国北方农牧交错带土地利用变化及其对生态系统服务价值的影响 |
| 摘要点击 481 全文点击 69 投稿时间：2024-02-29 修订日期：2024-06-05 |
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| 中文关键词 中国北方农牧交错带 土地利用/覆盖变化（LUCC） 生态系统服务价值（ESV） 地理信息图谱 价值当量因子 |
| 英文关键词 agro-pastoral ecotone of northern China land use /land cover change（LUCC） ecosystem service value （ESV） geographic information atlas value equivalence factor |
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| 中文摘要 |
| 利用地理信息图谱法分析中国北方农牧交错带2000~2020年土地利用时空变化特征,基于改进的当量因子法计算了研究区内的生态系统服务价值,并探讨了土地利用变化与生态系统服务价值变化间响应程度. 结果表明,中国北方农牧交错带最主要的用地类型为草地和耕地,2000~2020年的土地利用变化速率为0.59%,2010年后土地利用变化速率降低,建设用地是研究区增长最显著的土地利用类型,研究区土地利用转移图谱变化最为明显的是“耕地→草地”图谱类型,其次为“草地→耕地”图谱类型. 2000~2020年研究区土地利用涨势图谱中新增草地面积最大,其次为新增耕地,土地利用落势图谱中萎缩耕地面积最大,其次为萎缩草地. 中国北方农牧交错带ESV空间格局总体表现为“中部高-东西低”的特征,整体呈增加的趋势,主要表现为一般增加,耕地向草地和林地转换以及草地向林地转换是中国北方农牧交错带ESV增加的主要因素,草地向耕地以及水域向耕地的转换是研究区ESV减少的主要因素. 研究结果揭示了中国北方农牧交错带土地利用变化特征,明晰了不同土地利用转型类型对生态系统服务价值的影响程度,可为优化区域土地利用结构和空间格局、提升生态系统服务提供科学依据. |
| 英文摘要 |
| Using the geographic information graph method to analyze the spatiotemporal changes of land use/land cover change （LUCC） in the agro-pastoral ecotone of northern China from 2000 to 2020, the ecosystem service value （ESV） in the study area was calculated based on an improved equivalent factor method, and the response degree between LUCC and ESV change was explored. The results showed that the main land use types in the agro-pastoral ecotone of northern China were grassland and cultivated land. The land use change rate from 2000 to 2020 was 0.59%. After 2010, the land use change rate decreased, and construction land was the most significant land use type in the study area. The most obvious change in the land use transfer map in the study area was the “cultivated land → grassland” map type, followed by the “grassland → cultivated land” map type. In the land use increase map of the research area from 2000 to 2020, the newly added grassland area was the largest, followed by newly added cultivated land. In the land use decrease map, the shrinking cultivated land area was the largest, followed by shrinking grassland. The overall spatial pattern of ESV in the agro-pastoral ecotone of northern China showed a characteristic of “high in the central region and low in the east-west region,” showing an increasing trend, mainly manifested as a general increase. The conversion of cultivated land to grassland and forest land, as well as the conversion of grassland to forest land, were the main driving forces for the increase in ESV in the agro-pastoral ecotone of northern China. The conversion of grassland to cultivated land and water to cultivated land was the main driving force for the decrease in ESV in the study area. The research results reveal the characteristics of land use change in the agro-pastoral ecotone of northern China, clarify the impact of different types of land use transformation on the value of ecosystem services, and provide scientific basis for optimizing regional land use structure and spatial pattern and enhancing ecosystem services. |
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