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| 2000—2020年西南高山峡谷耕地边际化及生态效应 |
| Marginalization and ecological effects of cultivated land in alpine canyons of southwest China from 2000 to 2020 |
| 投稿时间：2024-04-21 |
| DOI：10.13254/j.jare.2024.0254 |
| 中文关键词: 耕地边际化 投入 产出 遥感生态指数 西南高山峡谷 GEE |
| 英文关键词: marginalization of cultivated land input output RSEI southwest mountain canyon GEE |
| 基金项目:国家重点研发计划项目（2022YFF1302905） |
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| 中文摘要: |
| 为探究西南高山峡谷区耕地边际化时空分布及其生态效应，基于多源遥感数据及社会经济统计数据，对西南高山峡谷区耕地边际化进行诊断和识别，利用GEE云平台计算遥感生态指数，以探究耕地边际化对生态质量的影响。结果表明：2000—2020年西南高山峡谷区耕地边际化比例先下降后上升，隐性边际化面积从6 666.74 km2波动下降至5 045.42 km2，显性边际化面积由83.99 km2波动上升至 800.25 km2。耕地边际化区域的生态质量总体上以不变和改善为主，二者占比除 2005—2010 年外均在 90% 以上，2005—2010年受极端气候等影响生态质量明显退化。不同类型耕地边际化的生态效应不同，轻度和中度边际化对生态质量产生积极影响，而重度边际化区域生态质量退化问题较为严重；生态边际化、自然边际化区域对生态质量具有一定的改善作用，经济边际化对生态质量的消极影响较为明显。研究表明，研究区耕地边际化呈先缓解后增强趋势，耕地边际化的生态效应既有积极影响也有消极影响，因此应针对不同类型边际化区域采取不同管护措施，推动该地区土地资源的有效利用和生态系统恢复。 |
| 英文摘要: |
| To examine the spatiotemporal distribution and impact of marginalization of cultivated land on ecological quality in the southwestern mountainous canyon region, this study utilized multi-source remote sensing and socio-economic data by employing the GEE platform to assess remote sensing ecological index. Results showed that：from 2000 to 2020, the marginalization ratio of arable land in the southwestern mountainous and canyon regions fluctuated, with implicit margins decreasing from 6 666.74 km2 to 5 045.42 km2 and explicit margins rising from 83.99 km2 to 800.25 km2. Overall, the ecological quality in these areas remained stable or improved, accounting for over 90% except during 2005—2010 when a notable decline occurred due to extreme weather and other factors. The ecological effects of different types of cultivated land marginalization were different. Mild and moderate marginalization had a positive impact on ecological quality, while the problem of ecological quality degradation in severely marginalized areas was more serious. Ecological marginalization and natural marginalization areas had a certain improvement effect on ecological quality, and the negative impact of economic marginalization on ecological quality was more obvious. The study indicates that arable land marginalization in the area initially eases then intensifies, with mixed ecological impacts. Tailored management and conservation strategies are needed for various marginalized zones to enhance land use and ecosystem recovery. |
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