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首页> 外文期刊>Catena: An Interdisciplinary Journal of Soil Science Hydrology-Geomorphology Focusing on Geoecology and Landscape Evolution >Urban soil organic carbon and its spatial heterogeneity in comparison with natural and agricultural areas in the Moscow region.
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Urban soil organic carbon and its spatial heterogeneity in comparison with natural and agricultural areas in the Moscow region.

机译：与莫斯科地区的自然和农业地区相比，城市土壤有机碳及其空间异质性。

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摘要

Soils hold the largest carbon stock in terrestrial ecosystems. Soil organic carbon (SOC) is formed under a combination of bioclimatic and land-use conditions. Therefore, one would expect changes in SOC stocks with land use changes like urbanization. So far, the majority of regional studies on SOC stocks exclude urban areas. The urban environment has a unique set of specific features and processes (e.g., soil sealing, functional zoning, settlement history) that influence SOC stocks and its spatial variability. This study aims to improve our understanding of urban SOC in comparison with agricultural and natural areas for the Moscow region (Russia). SOC content was studied in different land use types, soils, and urban zones through stratified random sampling. Samples of topsoil (0-10 cm) and subsoil (10-150 cm) were taken at 155 locations. SOC contents were significantly higher in urban areas compared with non-urban areas (3.3 over 2.7%). Further analyses proved that the difference can be explained by the so-called "cultural layer", which is the result of human residential activity and settlement history. SOC contents in the urban environment presented a very high spatial heterogeneity with standard deviations of urban SOC considerably higher than those for agricultural and natural areas. Soil depth, soil type and land-use factors had a significant influence on SOC variability determining more than 30% of the total variance. SOC contents in urban topsoil were mostly determined by soil type. In natural and agricultural areas soil type and land-use determined SOC contents. The results confirm the unique character of urban SOC and the need to reconsider established scientific and management views on regional SOC assessment, taking into account the role of urban carbon stocks.
机译：在陆地生态系统中，土壤拥有最大的碳储量。土壤有机碳（SOC）是在生物气候和土地利用条件的共同作用下形成的。因此，人们会期望随着城市化等土地用途的变化，SOC存量也会发生变化。到目前为止，关于SOC存量的大多数区域研究都将城市地区排除在外。城市环境具有一组独特的特定特征和过程（例如，土壤密封，功能分区，定居历史），这些特征和过程会影响SOC储量及其空间变异性。这项研究旨在与莫斯科地区（俄罗斯）的农业和自然地区相比，提高我们对城市SOC的理解。通过分层随机抽样研究了不同土地利用类型，土壤和城市地区的SOC含量。在155个位置采集了表层土壤（0-10厘米）和下层土壤（10-150厘米）的样品。与非城市地区相比，城市地区的SOC含量显着更高（3.3高于2.7％）。进一步的分析证明，这种差异可以用所谓的“文化层”来解释，这是人类居住活动和定居历史的结果。城市环境中的SOC含量呈现出很高的空间异质性，城市SOC的标准偏差大大高于农业和自然地区。土壤深度，土壤类型和土地利用因素对SOC变异性有重大影响，确定了总变异的30％以上。城市表层土壤的SOC含量主要取决于土壤类型。在自然和农业地区，土壤类型和土地利用决定了SOC含量。结果证实了城市SOC的独特性，并有必要考虑到城市碳储量的作用，重新考虑已建立的关于区域SOC评估的科学和管理观点。

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