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首页> 外文期刊>Soil Science Society of America Journal >Human-Transported Material Soils of Urbanizing Estuarine Landscapes
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Human-Transported Material Soils of Urbanizing Estuarine Landscapes

机译：人为运输的城市化河口景观物质土壤

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Additions of human-transported materials (HTM) have significantly altered many coastal shorelines and wetlands. The hydrology and the ability of these anthropogenic soils to support ecologically important functions is poorly understood. In this study, we documented soil hydrologic patterns along disturbed estuarine shorelines and wetlands. Our goal was to determine if the soils had properties relative to the potential to support denitrification (i.e., labile C, saturation, and reducing conditions). Eleven anthropogenic sites, located in Rhode Island and 30 to >60 yr old, were studied. Auger transects were completed to characterize anthropogenic soils. Water table levels were monitored twice a month. Anthropogenic soils were described and sampled from pits at five representative locations. Soil organic C (SOC), permanganate-oxidizable C (POC), bulk density, and pH were measured. Deposits of HTM, comprised of dredge and fill materials, ranged in thickness from 26 to >285 cm, were predominantly sandy and often contained artifacts. In the thickest HTM deposits, water table levels rose as much as 2.5 m above the original buried soil surface. Redoximorphic features were identified within the range of water table activity in 16 of the 18 monitored anthropogenic soils, suggesting reducing conditions. Soil organic C ranged from 1.6 to 88.9 g kg–1, was highest in surface horizons, and had an irregular distribution with depth. Labile C, estimated from POC measurements, followed the SOC distribution. Evidence of labile C, saturation, and reducing conditions in the majority of these soils suggest that most of the disturbed estuarine soils we studied have the capacity for denitrification.
机译：人类运输材料（HTM）的添加显着地改变了许多沿海海岸线和湿地。人们对水文 和这些人为土壤支持生态 重要功能的能力了解甚少。在这项研究中，我们 记录了沿河口 海岸线和湿地的土壤水文模式。我们的目标是确定土壤 相对于支持反硝化 的潜力是否具有属性（即，不稳定的碳，饱和度和还原条件）。研究了位于罗德岛的11个 人为场所，年龄在30到> 60 岁。俄歇样条线已完成以表征 人为土壤。每月对地下水位进行两次监测 。描述了人为土壤，并从五个代表性地点的 矿坑中取样。测量了土壤有机碳（SOC）， 高锰酸盐可氧化C（POC），堆积密度和pH。 HTM的沉积物包括挖泥和填充物，范围< sup> 厚度在26到> 285厘米之间，主要为沙质 且经常包含人工制品。在最厚的HTM沉积物中， 地下水位比原始的 埋藏的土壤表面高出2.5 m。在18种被监测的人为土壤中，有16种在地下水位活动范围内确定了氧化还原形态特征，表明了还原条件。土壤有机质 C范围为1.6〜88.9 g kg –1 ，表面 水平最高，深度不规则分布。通过POC测量估算的不稳定 C遵循SOC分布。 大多数土壤中 的不稳定C，饱和度和还原条件的证据表明我们研究的大多数受扰动的 河口土壤都具有反硝化能力。

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