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Suitability of phytoliths as a quantitative process tracer for soil erosion studies
Earth Surface Processes and Landforms ( IF 2.8 ) Pub Date : 2021-03-27 , DOI: 10.1002/esp.5121 Sabine Kraushaar 1 , Matthias Konzett 1 , Janika Kiep 2 , Christian Siebert 3 , Julia Meister 4
Earth Surface Processes and Landforms ( IF 2.8 ) Pub Date : 2021-03-27 , DOI: 10.1002/esp.5121 Sabine Kraushaar 1 , Matthias Konzett 1 , Janika Kiep 2 , Christian Siebert 3 , Julia Meister 4
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Phytoliths are plant microfossils commonly used as qualitative archive markers in archaeological and paleoecological studies. Their potential uniqueness to the vegetation cover, robustness to weathering, and lack of chemical alteration along the transport paths make them potentially suitable tracers for quantitative erosion studies. In this pilot study, we explore the potential of phytoliths in a sediment fingerprinting study in the Ceguera catchment (28 km2) in NE Spain. The phytolith concentrations and morphologies of four land cover classes (agricultural land, badland, forest, and shrubland) were analysed, and their contributions to four natural sediment mixture samples along the river course were modelled. Phytolith concentrations allowed us to discriminate sources sufficiently, albeit with limited sample size. The performance of the phytoliths as tracer was tested by reproducing the sources of artificial sediment mixture samples with satisfactory recall ratio. Results identified badlands to be the main contributor, with 84–96% of the sediment load to the sinks, followed by shrublands (median 5%) and agricultural lands (median 2%). These major findings can be reproduced by other conventional erosion studies from this area, indicating that phytoliths are suited to quantifying erosion patterns in mesoscale catchments.
中文翻译：
植硅体作为土壤侵蚀研究定量过程示踪剂的适用性
植硅体是植物微化石，通常用作考古和古生态研究中的定性档案标记。它们对植被覆盖的潜在独特性、对风化的鲁棒性以及沿运输路径缺乏化学变化使它们成为定量侵蚀研究的潜在合适示踪剂。在这项试点研究中，我们在 Ceguera 流域（28 km 2) 在西班牙东北部。分析了四种土地覆盖类型（农用地、荒地、森林和灌木地）的植硅体浓度和形态，并模拟了它们对沿河道的四种天然沉积物混合物样本的贡献。植硅体浓度使我们能够充分区分来源，尽管样本量有限。通过重现具有满意召回率的人工沉积物混合物样品的来源来测试植硅体作为示踪剂的性能。结果表明，恶地是主要贡献者，其中 84-96% 的沉积物负载到汇，其次是灌木地（中值 5%）和农田（中值 2%）。这些主要发现可以通过该地区的其他常规侵蚀研究重现，
更新日期：2021-03-27
中文翻译：
植硅体作为土壤侵蚀研究定量过程示踪剂的适用性
植硅体是植物微化石，通常用作考古和古生态研究中的定性档案标记。它们对植被覆盖的潜在独特性、对风化的鲁棒性以及沿运输路径缺乏化学变化使它们成为定量侵蚀研究的潜在合适示踪剂。在这项试点研究中，我们在 Ceguera 流域（28 km 2) 在西班牙东北部。分析了四种土地覆盖类型（农用地、荒地、森林和灌木地）的植硅体浓度和形态，并模拟了它们对沿河道的四种天然沉积物混合物样本的贡献。植硅体浓度使我们能够充分区分来源，尽管样本量有限。通过重现具有满意召回率的人工沉积物混合物样品的来源来测试植硅体作为示踪剂的性能。结果表明，恶地是主要贡献者，其中 84-96% 的沉积物负载到汇，其次是灌木地（中值 5%）和农田（中值 2%）。这些主要发现可以通过该地区的其他常规侵蚀研究重现，
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