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首页> 外文期刊>Landscape and Urban Planning >Land use and land cover changes explain spatial and temporal variations of the soil organic carbon stocks in a constructed urban park
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Land use and land cover changes explain spatial and temporal variations of the soil organic carbon stocks in a constructed urban park

机译：土地利用和土地覆盖的变化解释了人工城市公园中土壤有机碳储量的时空变化

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Urban parks offer valuable ecosystem services to citizens and they have long been recognized for their recreational service; however, less attention has been paid to their carbon sequestration value. Here, we report on soil organic carbon (SOC) stocks in an urban park, Seoul Forest Park, which was built in 2004. We had two objectives: (1) to estimate SOC stocks (to a depth of 1 m) in different land-cover types (wetland, forest, lawn, and bare soil) and (2) quantify the change in the SOC concentration in topsoil in different land-use types over a 10 year period (2003-2013). We found a tenfold difference in SOC stocks across the different land-cover types within the park. Wetland soils had the highest stocks of SOC (13.99 +/- 1.05 kg m(-2)), followed by forest, lawn, and bare soils. We found that a "cultural layer" that preserved previous land use history located deep in the soil profile substantially increased SOC stocks in the wetland. SOC concentrations in the topsoil were approximately three times higher in 2013 than in 2003 (256 +/- 130%). The normalized difference vegetation index (NDVI) derived from MODIS and Landsat satellite images revealed that land-use history, expansion of plant areas and growth of plants could explain the increase in SOC concentrations in topsoil over the 10 year period. These findings imply that urban park soils could act as a carbon sink, and understanding the land-use history and the choice of land-cover types in park planning can substantially influence the carbon budget of urban parks. (C) 2014 Elsevier B.V. All rights reserved.
机译：城市公园为公民提供了宝贵的生态系统服务，并且长期以来以休闲服务而闻名。然而，人们对其碳固存价值的关注较少。在此，我们报告了建于2004年的城市公园首尔森林公园中的土壤有机碳（SOC）存量。我们有两个目标：（1）估算不同土地上的SOC存量（深度为1 m）覆盖类型（湿地，森林，草坪和裸露的土壤）和（2）量化了十年（2003年至2013年）不同土地利用类型中表土土壤SOC浓度的变化。我们发现公园内不同土地覆盖类型的SOC存量相差十倍。湿地土壤的SOC含量最高（13.99 +/- 1.05 kg m（-2）），其次是森林，草坪和裸土。我们发现，保留了以前土地使用历史的“文化层”位于土壤剖面的深处，大大增加了湿地的SOC储量。 2013年表层土壤的SOC浓度约为2003年的三倍（256 +/- 130％）。从MODIS和Landsat卫星图像得出的归一化差异植被指数（NDVI）表明，土地使用历史，植物面积的扩大和植物的生长可以解释十年来表层土壤SOC浓度的增加。这些发现表明，城市公园的土壤可以充当碳汇，并且在公园规划中了解土地使用历史和土地覆盖类型的选择会极大地影响城市公园的碳预算。 （C）2014 Elsevier B.V.保留所有权利。

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