Effects of land-use and climate change on sediment and nutrient retention in Guizhou, China

作者：Huiqing Han, Jianqiang Yang, Geng Ma, Yue Liu, Linan Zhang, Siying Chen, Shuliang Ma · 发表于：Ecosystem Health and Sustainability · 年份：2020 · DOI：10.1080/20964129.2020.1810592 · 被引用次数：21 · 研究领域：Land Use and Ecosystem Services、Hydrology and Watershed Management Studies、Soil erosion and sediment transport

ABSTRACT Introduction Sediment and nutrient retention have significant impacts on agricultural productivity and water quality. Obvious changes of climate and land-use have deeply affected freshwater ecosystem services in the last several decades. Nevertheless, it is unclear what the differences are in the impact of climate and land-use changes on freshwater ecosystem services. Outcomes The impacts of climate and land-use change on sediment and nutrient retention (two essential freshwater ecosystem services) were evaluated with the help of the Integrated Valuation of Environmental Services and Tradeoffs (InVEST) model. The results from the study area suggest a decreasing trend in sediment and nutrient retention from 1995 to 2015 when climate and land-use were changed simultaneously. A decreasing trend in sediment retention and an increasing trend in nutrient retention were presented under scenario A (climate change from 1995 to 2015 with land-use unchanged), while the sediment exported and nutrient retention exhibited a decreasing trend except sediment retained under scenario B (land-use change from 1995 to 2015 with unchanged climate). Rainfall erosivity and soil erodibility were more sensitive to the output of sediment retention, while retention efficiency produced more of an effect on nutrient retention. Discussion and Conclusion Climate change played a dominant role in the change in sediment retention, while land-use change had a more significant effect on nutrient retenti...