Dissolved organic carbon (DOC) concentrations in UK soils and the influence of soil, vegetation type and seasonality.
Dissolved organic carbon (DOC) concentrations in UK soils and the influence of soil, vegetation type and seasonality.
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DOI：
10.1016/j.scitotenv.2012.03.069
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发表时间：
2012-06
期刊：
影响因子：
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通讯作者：
L. V. D. van den Berg;L. Shotbolt;M. Ashmore
中科院分区：
文献类型：
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作者：
L. V. D. van den Berg;L. Shotbolt;M. Ashmore
鉴于缺乏长期测量溶解有机碳（DOC）的研究，特别是在非森林栖息地中，本研究的目的是利用代表英国主要土壤和栖息地类型的主要非森林地点的数据来扩展现有数据集。进一步的目标是通过多种生物和非生物解释变量（例如降雨量、温度、植被类型和土壤类型）以多元方式预测 DOC 浓度。一年内，使用 Rhizon 或 Prenart 采样器每隔两到三周对孔隙水进行采样。测量土壤和坡度的 DOC、pH、有机碳、碳/氮 (C:N) 比，获得植被、土壤类型、温度和降水数据。英国站点之间 DOC 浓度的大部分变化可以通过简单的经验模型来解释，其中包括年降水量和土壤 C:N 比，其中降水量与 DOC 浓度负相关，而 C:N 比与 DOC 浓度正相关。我们的研究显着增加了土壤中 DOC 浓度的数据报告，特别是在草原、荒地和沼泽地。广泛的气候和场地因素已被确定为影响 DOC 浓度的关键因素。
Given the lack of studies which measured dissolved organic carbon (DOC) over long periods, especially in non-forest habitat, the aim of this study was to expand the existing datasets with data of mainly non-forest sites that were representative of the major soil and habitat types in the UK. A further aim was to predict DOC concentrations from a number of biotic and abiotic explanatory variables such as rainfall, temperature, vegetation type and soil type in a multivariate way. Pore water was sampled using Rhizon or Prenart samplers at two to three week intervals for 1year. DOC, pH, organic carbon, carbon/nitrogen (C:N) ratios of soils and slope were measured and data on vegetation, soil type, temperature and precipitation were obtained. The majority of the variation in DOC concentrations between the UK sites could be explained by simple empirical models that included annual precipitation, and soil C:N ratio with precipitation being negatively related to DOC concentrations and C:N ratio being positively related to DOC concentrations. Our study adds significantly to the data reporting DOC concentrations in soils, especially in grasslands, heathlands and moorlands. Broad climatic and site factors have been identified as key factors influencing DOC concentrations.