Laboratory for Earth Surface Processes, Ministry of Education, College of Urban and Environmental Sciences, Peking University, Beijing, 100871, China.
Laboratory for Earth Surface Processes, Ministry of Education, College of Urban and Environmental Sciences, Peking University, Beijing, 100871, China.
J Environ Manage. 2022 Aug 15;316:115206. doi: 10.1016/j.jenvman.2022.115206. Epub 2022 May 19.
Changes in land use intensity and types can affect the structure and function of ecosystems, and thus ecosystem services (ESs) as well as their interactions. However, the impacts of changes in land use intensity on ESs remain poorly understood. Through four different land use scenarios, we distinguished the independent contribution of changes in agricultural land use intensity and types to grain production (GP), water purification (WP), and their trade-offs in the Dongting Lake Basin. The results showed that from 1990 to 2015, GP increased across 58.07% of the total area, but WP decreased across 64.81% of the study area. The two ESs simultaneously increased or decreased across 41.93% of the total area. Watersheds covering 48.72% of the study area where GP increased and WP decreased were mainly distributed in areas with increased land use intensity. The other regions where GP decreased and WP increased were mainly distributed in areas with decreased land use intensity. The scenario analysis of GP, WP, and their trade-offs showed that the areas where agricultural land use intensity was the dominant factor were as large as 1.95 times, 2.38 times, and 2.43 times those dominated by land use type respectively, under the same climate conditions. This study highlighted the importance of changes in agricultural land use intensity on ES, which provided further supporting to ES-based land use management.
土地利用强度和类型的变化会影响生态系统的结构和功能，从而影响生态系统服务（ES）及其相互作用。然而，土地利用强度变化对 ES 的影响仍知之甚少。通过四种不同的土地利用情景，我们区分了农业土地利用强度和类型变化对洞庭湖流域粮食生产（GP）、水净化（WP）及其权衡的独立贡献。结果表明，1990 年至 2015 年，总耕地面积中 GP 增加了 58.07%，但 WP 减少了 64.81%。这两个 ES 同时在总耕地面积的 41.93%上增加或减少。覆盖研究区 48.72%的耕地面积，GP 增加而 WP 减少的流域主要分布在土地利用强度增加的地区。其他 GP 减少而 WP 增加的地区主要分布在土地利用强度降低的地区。GP、WP 及其权衡的情景分析表明，在相同气候条件下，农业土地利用强度为主导因素的面积分别是土地利用类型为主导因素的面积的 1.95 倍、2.38 倍和 2.43 倍。本研究强调了农业土地利用强度变化对 ES 的重要性，为基于 ES 的土地利用管理提供了进一步的支持。
