State Key Laboratory of Subtropical Silviculture, Zhejiang A & F University, Hangzhou, 311300, China.
School of Geography and Environment, Shandong Normal University, Jinan, 250358, China.
Environ Res. 2021 Feb;193:110618. doi: 10.1016/j.envres.2020.110618. Epub 2020 Dec 11.
Understanding of urban forestland both type structure and change and their effects on forest ecosystem services (ES) is important for maintaining and enhancing the quality of life as well as ensuring sustainable urban planning in cities. In Hangzhou city of Zhejiang province in Southeast China, forestland covers more than 71% of its total land area, thereby providing a high variety of ES. Many studies have focused on the effects of land use change on ES value (ESV), but these have only applied to the first-level classification of land use. So there is an urgent need for studies to measure the effects of land use change on ESV applied to the second-level classification of land use. In this present study, from a rare insight into the forestland landscape change of Hangzhou city, the spatiotemporal dynamics of urban forest ESV (UFESV) during the period of 2000-2015 are analyzed based on the combination of remote sensing and a light-use-efficiency model (CASA). The results indicate that the total value of urban forest ES increases from 9.79 × 10 Yuan in 2000 to 12.31 × 10 Yuan in 2015, with a net increase of 2.52 × 10 Yuan in Hangzhou city, and forested land has the highest UFESV, contributing about 99.49% of the total services value, although the area of forestland decreases by 101.99 km over the past 15 years. Carbon fixation and oxygen release and organic matter production are the two dominant service functions, accounting for 87.56% of the total on average. The construction and planning of Hangzhou's forest city has a positive impact on the value of urban forest ES during 2000-2015.
理解城市林地的类型结构和变化及其对森林生态系统服务（ES）的影响，对于维持和提高生活质量以及确保城市的可持续规划非常重要。在中国东南部浙江省的杭州市，林地覆盖了其总面积的 71%以上，从而提供了多种 ES。许多研究都集中在土地利用变化对 ES 价值（ESV）的影响上，但这些研究仅适用于土地利用的一级分类。因此，迫切需要研究应用土地利用二级分类来衡量土地利用变化对 ESV 的影响。在本研究中，从对杭州市林地景观变化的罕见洞察出发，基于遥感和光能利用效率模型（CASA）的结合，分析了 2000-2015 年期间杭州市城市森林 ESV（UFESV）的时空动态。结果表明，城市森林 ES 的总价值从 2000 年的 9.79×10 元增加到 2015 年的 12.31×10 元，杭州市净增加了 2.52×10 元，林地具有最高的 UFESV，约占总服务价值的 99.49%，尽管过去 15 年林地面积减少了 101.99km。固碳释氧和有机质生产是两个主要的服务功能，平均占总服务价值的 87.56%。2000-2015 年，杭州市森林城市的建设和规划对城市森林 ES 价值产生了积极影响。
