TY - GEN A1 - Bayuzick, Samuel A1 - Drohan, Patrick J. A1 - Raab, Thomas A1 - Hirsch, Florian A1 - Bonhage, Alexander A1 - McDill, Marc A1 - Diefenbach, Duane T1 - Relic charcoal hearths geomorphology and hydrology in mid-Appalachian region of Pennsylvania T2 - EGU General Assembly 2021 Y1 - 2021 U6 - https://doi.org/10.5194/egusphere-egu21-6243 ER - TY - GEN A1 - Bonhage, Alexander A1 - Bayuzick, Samuel A1 - Drohan, Patrick J. A1 - Hirsch, Florian A1 - Raab, Thomas T1 - Relict charcoal hearth landscape and soil profile characteristics surrounding a mid-19th century Appalachian iron furnace T2 - EGU General Assembly 2021 Y1 - 2021 U6 - https://doi.org/10.5194/egusphere-egu21-5691 ER - TY - GEN A1 - Kaestner, Friederike A1 - Sut-Lohmann, Magdalena A1 - Raab, Thomas A1 - Feilhauer, Hannes A1 - Chabrillat, Sabine T1 - Remediation-related monitoring of heavy metal concentration of contaminated Technosol using hyperspectral measurements T2 - EGU General Assembly 2021 Y1 - 2021 U6 - https://doi.org/10.5194/egusphere-egu21-11479 ER - TY - GEN A1 - Ramezany, Shaghayegh A1 - Sut-Lohmann, Magdalena A1 - Klos, Friederike A1 - Bonhage, Alexander A1 - Raab, Thomas T1 - Using Modified Tessier Scheme to Metal Speciation in a Former Sewage Farm and interpretation of the sequential extraction by FTIR T2 - EGU General Assembly 2021 Y1 - 2021 U6 - https://doi.org/10.5194/egusphere-egu21-6482 ER - TY - GEN A1 - Sut-Lohmann, Magdalena A1 - Ramezany, Shaghayegh A1 - Klos, Friederike A1 - Raab, Thomas T1 - Spatial and vertical determination of chosen potentially toxic metals and soil properties on a former sewage farm near Berlin T2 - EGU General Assembly 2021 Y1 - 2021 U6 - https://doi.org/10.5194/egusphere-egu21-4220 ER - TY - GEN A1 - Sut-Lohmann, Magdalena A1 - Ramezany, Shaghayegh A1 - Kästner, Friederike A1 - Raab, Thomas T1 - Feasibility of pXRF to evaluate chosen heavy metals in soil highly influenced by municipal waste disposal - a Former Sewage Farm Monitoring Study T2 - Land Degradation & Development Y1 - 2022 U6 - https://doi.org/10.1002/ldr.4147 SN - 1099-145X VL - 33 IS - 3 SP - 439 EP - 451 ER - TY - GEN A1 - Sut-Lohmann, Magdalena A1 - Ramezany, Shaghayegh A1 - Kästner, Friederike A1 - Raab, Thomas A1 - Heinrich, Martina A1 - Grimm, Mark T1 - Using modified Tessier sequential extraction to specify potentially toxic metals at a former sewage farm T2 - Journal of Environmental Management Y1 - 2022 U6 - https://doi.org/10.1016/j.jenvman.2021.114229 SN - 1095-8630 SN - 0301-4797 VL - 304 ER - TY - GEN A1 - Kästner, Friederike A1 - Sut-Lohmann, Magdalena A1 - Ramezany, Shaghayegh A1 - Raab, Thomas A1 - Feilhauer, Hannes A1 - Chabrillat, Sabine T1 - Estimating heavy metal concentrations in Technosols with reflectance spectroscopy T2 - Geoderma Y1 - 2022 U6 - https://doi.org/10.1016/j.geoderma.2021.115512 SN - 0016-7061 VL - 406 ER - TY - GEN A1 - Sekhri, Simran A1 - Raab, Thomas A1 - Drohan, Patrick J. T1 - A Model Approach Assessing The Soil Properties Of Raised Bed Landscapes T2 - EGU General Assembly 2022, Vienna, Austria, 23–27 May 2022 N2 - Common anthropogenic surface features across Scotland and Ireland are raised beds, which are agronomic ridges and furrows created prior to the 20th century to improve agricultural yield. Creating a raised bed improves yield by providing to the root zone better soil drainage, suitable micro-climatic conditions, and enrichment of organic matter and nutrients. Raised beds are structurally identifiable and can be examined using remote sensing techniques such as LIDAR imagery or aerial photography to analyze different dimensions of raised bed units. We examined the geomorphic parameters (height, length, breadth, ridge shape, furrow depth, unit orientation and block size) of raised beds found in the Fancroft region of County Offlay, Ireland. We developed a model of raised bed structural components and the distribution and change in soil properties including soil drainage, texture, horizon differentiation, soil colour, nutrient distribution, organic matter movement and the carbon influx and outflow have been provided. Our study aims to elucidate the typical geomorphic properties of raised bed landscapes, their basic chemical and physical soil properties and the landform attributes that may influence soil properties. Overall, the conceptual basis of raised bed landscapes have been visualised and presented to formulate an ideal raised bed theoretical model. Such a comprehensive model can be further extended to learn more about ancient agricultural practices, heritage, a causal link between present day and historical farming practices. Y1 - 2022 U6 - https://doi.org/10.5194/egusphere-egu22-7137 ER - TY - GEN A1 - Drohan, Patrick J. A1 - Bayuzick, Samuel A1 - Guarin, Daniel A1 - Raab, Thomas A1 - Bonhage, Alexander A1 - Diefenbach, Duane A1 - McDill, Marc T1 - USA Appalachian relict charcoal hearths have complex landscape and pedologic patterns that are unique from surrounding forest ecosystems T2 - EGU General Assembly 2022, Vienna, Austria, 23–27 May 2022 N2 - Understanding how present-day abrupt change may alter forest ecosystem services is becoming more important due to ever-growing anthropogenic stresses. Forest managers trying the adapt to anthropogenic stress can benefit from the study and quantification of past abrupt changes in forests, especially when the legacy of past disturbance is still evident. Across the United Kingdom, Europe, and recently the northeastern United States, the examination of historic forest change due to charcoal manufacturing for the firing of iron or lime furnaces is yielding new insights relative to landscape stability, anthropogenic vs natural soil genesis, and forest evolution. A landscape classification process was used in the Central Appalachians (Pennsylvania) to identify 6,758 RCHs near Greenwood Furnace (Greenwood Furnace State Park) and Pine Grove Furnace (Pine Grove Furnace State Park). Topographic wetness index (TWI), and SAGA wetness index (SWI) were created using ~1m LiDAR data for two study areas to quantify surface hydrology effects and were compared to field soil volumetric water content (VWC) measurements. Modeled TWI and SWI values were different for RCH areas when compared to surrounding non-hearth areas indicating that RCHs were acting as a moisture sink. We also found that RCH platforms have different TWI and SWI values than rim areas. Using field measured volumetric water content, we found that as distance from the center of the RCH increases, the drier the soil becomes. Geomorphic position did not affect wetness. Surface soil samples were collected at 51 RCHs in the Greenwood Furnace study area. Laboratory analyses revealed that RCH soils have higher C content than surrounding native soils. Furthermore, while the pH of RCH soils is like native soils, the acidity is greater in RCHs. RCH soils at Greenwood Furnace were found to have lower Mehlich 3 P concentrations and lower K potentially effecting plant growth. RCH soils were found to have higher Ca concentration when compared to native soils. To examine within RCH differences in soil chemistry and morphology more closely, 8 of the 51 RCHs were sampled intensely along a topographic gradient. Control pits were excavated directly upslope from the RCHs. The RCHs were sampled in 5 positions across the hearth from the upslope to down slope position (A upslope rim of the RCH; B halfway point between A and C; C RCH center; D halfway C and E; E downslope rim of the RCH). Soil profiles were described and sampled at each position. The soil samples were analyzed for trace and rare earth element content (Aqua Regia digestion), soil pH (water) and fertility (Mehlich 3 extraction). Results indicated that RCHs are potentially a unique location of refugia for forest flora and perhaps fauna due to the unique geochemistry with higher bases and C and some concentrated metals and a higher soil water content hypothesized to be due to an observed restrictive morphology. Future research should more closely investigate whether RCHs support unique species assemblages and how they may play a role in enhancing today’s forest biodiversity. Y1 - 2022 U6 - https://doi.org/10.5194/egusphere-egu22-10315 ER - TY - GEN A1 - Ramezany, Shaghayegh A1 - Bonhage, Alexander A1 - Raab, Thomas T1 - Comparing prediction algorithms in FTIR-based chemometric analysis to predict soil variables within centuries-old charcoal rich Technosols T2 - EGU General Assembly 2022, Vienna, Austria, 23–27 May 2022 N2 - As an alternative to the costly wet chemical analysis of soil, Machine Learning (ML) algorithms can be applied for the quantification of soil properties through prediction models. In this study, we evaluate the performances of the Random Forest (RF) algorithm and Partial Least Square Regression (PLSR), in the prediction of soil variables, including CEC, pH, total contents of C and N as wells as other elements (Al, Fe, Ca, Mn, Mg, K, and Na) based on FTIR-spectra of Relict Charcoal Hearth (RCH) soils and reference forest soils (Non-RCH). We investigate the effect of high quantities of charcoal in the soil on the prediction models. Preliminary results suggest that there is no significant difference in the results of prediction models for total N, C, and Fe contents, while the accuracy of PLSR in the prediction of pH, Mg, and Ca, and RF performance in prediction of pH and C decreased for RCH soils. Both algorithms demonstrate higher accuracies in the prediction of Al within the RCH soils. Prediction of CEC, Na, K, Mg (RF) within the RCH soils, Al (PLSR) for Non-RCH soils, and Mn and Ca (RF) for both soil types resulted in lower quality of predictions. It can be inferred from the results that the performance of FTIR-based prediction models can be affected by the presence of charcoal in soil due to the nature of spectral features reflecting the soil composition. The presence of charcoal in soil likely alters the absorption interference and peak overlaps, which can result in lower accuracy of the prediction models. In addition to the accuracy of the prediction models, we evaluate the reliability of the weighted wavenumbers (as important variables) in each prediction, which provides information about the correlation of spectral features and chemical properties. It can be studied through the Variable Importance Plot in RF and Variable Importance on Projection through PLSR (VIPs), which show high potential for studying soil composition and metal distribution in mineral and organic soil fractions despite the observed weaknesses in weighing wavenumbers in predictions. Therefore, we assess and compare the quality of information gained regarding soil chemical properties from the algorithms besides a sole quantification of soil parameters. Furthermore, we applied the developed prediction models on a large number (n > 600) of FTIR-spectra of RCH soils to investigate the practical application of the models and thereby compare spectral derived chemical properties of the studied Technosols and reference forest soils. Y1 - 2022 U6 - https://doi.org/10.5194/egusphere-egu22-5507 ER - TY - GEN A1 - Matvejeva, Agne A1 - Sut-Lohmann, Magdalena A1 - Dietrich, Nils A1 - Heinrich, Martina A1 - Raab, Thomas T1 - Fiber hemp as a feasible crop for enhancing carbon sequestration and cultivation under water scarcity in sandy agricultural soils T2 - EGU General Assembly 2022, Vienna, Austria, 23–27 May 2022 N2 - Extended dry periods and increasing soil degradation compel the conventional agriculture to shift towards the sustainable practices. Hemp (Cannabis Sativa L.) accounts for crops that require low agricultural inputs and has a high potential to improve soil health hence fertility. The rapid hemp growth, high biomass production and remarkably expanded rooting zone have the vast potential in carbon (C) sequestration and nitrogen (N) fixation. Hemp fibers in the European Union (EU) are commonly used for pulp and paper industry and isolation materials. The study aims to (i) analyze hemp feasibility to grow and contribute to C sequestration under the water scarce conditions in initially nutrient-poor arable sandy soil with high and low canopy densities, and (ii) assess the use of hemp residues like shives and leaves as soil amendments for oat and corn crops in order to increase soil water holding capacity and serve as a long-term nutrient supply. Hemp, oat and corn crops were grown in a greenhouse experiment under LED illumination and wind ventilation for 17 h per day until the harvest. Hemp fibers were obtained through decortication. The biomass of all crops, hemp roots separated into fine and main, soil prior and after the experiment, and soil amendments were investigated for the total C and N content with an ELEMENTAR Vario Max Cube. Also, the elemental analysis for Ca, Mg, K, Zn, Cu, Fe, Al, Na was performed using HNO3 and MP-AES analyses. Total dry root mass for oat and corn crops was measured. Additionally, the soil pH and electrical conductivity (EC) were determined. The results showed that water scarcity had hindered hemp height and biomass production. While under the water limited conditions, the low hemp canopy density had showed slightly advanced growth in comparison to the high canopy density. Furthermore, the results of oat and corn experiment indicated difference between the treatments, where the soil amendment from hemp leaves compared to hemp shives showed enhanced growth in both plant and root biomass Y1 - 2022 U6 - https://doi.org/10.5194/egusphere-egu22-2564 ER - TY - GEN A1 - Sut-Lohmann, Magdalena A1 - Matvejeva, Agne A1 - Dietrich, Nils A1 - Heinrich, Martina A1 - Raab, Thomas T1 - Cultivation of fiber hemp using solid and liquid residues from municipal composting in a closed system T2 - EGU General Assembly 2022, Vienna, Austria, 23–27 May 2022 N2 - Progressing degradation of agricultural soil demands a change to more sustainable cropping systems accounting for crops that can sustain the soil health. Hemp is known for the improvement of soil physical, chemical and biological properties. The objective of the research is to analyze the hemp plant capability to grow under nutrient poor soil conditions and dense canopy and to assess hemp’s ability to uptake plant nutrients applied with/by soil amendments produced from biowaste. Additionally, the research aims to analyze how the hemp nutrition affects its morphogenesis, thus the fiber content. In the greenhouse set up, Cannabis Sativa L. was grown in sandy substrate, with limited water supply that corresponded to the common drought periods in Brandenburg (Germany) and with addition of soil amendments in form of pellets from organic waste (OW) digestives. The treatments included: 5 control pots, 10 pots with pellets (19 kg soil / 230 g pellets according to the allowed application of 13 t/ha) and 10 pots with 19 kg soil / 3 kg pellets. When needed, a universal liquid fertilizer was applied which contained water soluble minerals like N, P2O5 and K2O. After 92 days, the plants were harvested, dried and weighted. The root structure was examined visually. The stems were decorticated using BMS-FLAKSY® (Rossmanith GmbH) to analyze the fiber content. The Elementar vario MAX cube analyzer device was used to analyse C and N contents. The results showed that hemp could still flourish in water and nutrient limited environment. A deeper and denser rooting was observed in the treatments with pellets. It was observed that fine roots were encircled and attached to the pellets to access the nutrients stored there. The highest C:N ratio in soil and in leaves was found in treatments that contained the most pellets. The option to apply pellets produced from OW in larger quantities instead of a fertilizer application had a striking effect on hemp growth and biomass accumulation hence, increased dry matter amount and fiber yield. Y1 - 2022 U6 - https://doi.org/10.5194/egusphere-egu22-1681 ER - TY - CHAP A1 - Bork, Hans-Rudolf A1 - Fritzsch, Dagmar A1 - Khamnueva-Wendt, Svetlana A1 - Meier, Dirk A1 - Mentzer, Susan M. A1 - Miller, Christopher E. A1 - Raab, Thomas A1 - Röpke, Astrid A1 - Schumacher, Mara Lou A1 - Stahlschmidt, Mareike C. A1 - Stäuble, Harald A1 - Stolz, Christian A1 - Wendt, Jann ED - Stolz, Christian ED - Miller, Christopher E. T1 - Künstliche Ablagerungen T2 - Geoarchäologie N2 - Der fachgerechten Einordnung von Ablagerungen, die aktiv durch den Menschen erzeugt wurden, und der daraus resultierenden Formen kommt in der Geoarchäologie eine Schlüsselrolle zu. Das Kapitel befasst sich zunächst mit künstlichen Aufschüttungen in unterschiedlichen Teilen der Welt, wie Hügeln unterschiedlicher Größe, Bedeutung und Funktion, Wallburgen, Ringwälle, Landwehren und Warften, weiterhin mit Siedlungshügeln, sogenannten Tells, sowie mit speziellen Formen der Agrarlandschaft (Raine, Knicks u. a.). Weiterhin geht es um die in der Archäologie stets bedeutsamen Verfüllungen von Gräben, Gruben und anderen menschgemachten Hohlformen, sowie um Ablagerungen im unmittelbaren Siedlungsbereich und deren Einordnung. Der letzte Abschnitt widmet sich künstlichen Ablagerungen und Formen infolge von Bergbau, wie Halden und Pingen und der damit verbundenen Beeinflussung von Böden und Relief. Y1 - 2022 U6 - https://doi.org/10.1007/978-3-662-62774-7_10 SP - 165 EP - 206 PB - Springer Spektrum CY - Berlin, Heidelberg ER - TY - GEN A1 - Buras, Allan A1 - Hirsch, Florian A1 - Schneider, Anna A1 - Scharnweber, Tobias A1 - Maaten, Ernst van der A1 - Cruz-García, Roberto A1 - Raab, Thomas A1 - Wilmking, Martin T1 - Reduced above-ground growth and wood density but increased wood chemical concentrations of Scots pine on relict charcoal hearths T2 - Science of The Total Environment N2 - Deciphering the drivers of tree growth is a central aim of dendroecology. In this context, soil conditions may play a crucial role, since they determine the availability of water and nutrients for trees. Yet, effects of systematically differing soil conditions on tree growth render a marginally studied topic. In this context, relict charcoal hearths (RCH) – a widespread legacy of anthropogenic charcoal production – render a valuable ‘natural’ experiment to study possible effects of artificially altered soil conditions on tree growth. We hypothesize, that the differing physico-chemical properties of RCH result in differing wood properties if compared to trees growing on unmodified soils. To test this hypothesis, we analyzed tree-growth, wood density, and wood elemental concentrations of Scots pine as well as physico-chemical soil properties. We applied a classic control-treatment design to compare RCH with unmodified soils. Our analyses identified significantly lower above-ground wood production but systematically higher wood elemental concentrations in RCH-trees compared to control trees. Since we could not identify treatment-specific growth patterns, we hypothesize the observed lower above-ground productivity of Scots pine to indicate an increased root-shoot ratio to compensate for a potentially lower plant water availability on RCH-sites. The observed higher wood elemental concentrations likely reflect higher soil elemental concentrations of Fe, Ca, K, and Mn in RCH soils. In conclusion, our study highlights diverse effects of RCH on tree growth and wood properties and strengthens the value of dendro-chemistry to use the tree-ring archive as proxy for soil conditions within a dendro-ecological context. Y1 - 2020 U6 - https://doi.org/10.1016/j.scitotenv.2020.137189 SN - 1879-1026 SN - 0048-9697 VL - 717 ER - TY - GEN A1 - Kästner, Friederike A1 - Sut-Lohmann, Magdalena A1 - Grimm, Mark A1 - Feilhauer, Hannes A1 - Küster, Theres A1 - Raab, Thomas T1 - Identification of potential toxic elements (PTE) in Technosols and in the hyperaccumulator plant Brassica juncea with imaging spectroscopy T2 - 12th EARSeL Workshop on Imaging Spectroscopy N2 - Vital, fertile soil is a limited resource and must be considered equal to air and water in its status as a protected good. In Europe, there are around 2.5 million potentially contaminated due to natural and anthropogenic activities. One third of these areas have been identified and 15% of them have already been remediated. An efficient approach for remediation is phytoremediation, a cost-effective and ecosystem-friendly method compared to conventional methods. We showed that hyperaccumulator plants, which have a high tolerance to the accumulation of potentially toxic elements (PTE), are suitable for phytoremediation methods. Imaging spectroscopy allowed us to monitor and optimize the process of accumulation. Our study was conducted in two steps: First we analysed the potential of multivariate procedures using Partial Least Squares Regression (PLSR) and Random Forest Regression (RFR) to predict highly contaminated areas with an inhomogeneous distribution of PTE concentrations from image data. Therefore, we used contaminated soil samples analysed for heavy metal contents as training data. The fully-trained models assisted to monitor PTE contaminated areas during phytoremediation. In a second step, we investigated hyperaccumulator plants and their spectral fingerprints during PTE uptake to detect the highest possible amount of PTE the plant can tolerate. Soil samples were measured after different preparation steps (“oven-dried”, “sieved”, “ground”, “Loss on Ignition (LOI)”) with a HySpex VNIR-1600 and HySpex SWIR 320m-e hyperspectral sensor under laboratory conditions. The spectral range of both sensors covers 450 nm to 2500 nm with a spectral sampling interval of 3.7 nm for the VNIR sensor and 6.25 nm for the SWIR sensor. The resulting spectral library was used for the PLSR and RFR analysis. Considering the optimal coefficient of determination (R2), PLSR showed an improving performance and accuracy with increasing preparation steps: R2_Cr: 0.52–0.78; R2_Cu: 0.36–0.73; R2_Ni: 0.19–0.42 and R2_Zn: 0.41–0.74. In comparison, RFR showed a weaker estimation performance, even when using higher sample preparation levels (R2_Cr:0.36–0.62; R2_Cu: 0.17–0.72; R2_Ni: 0.20–0.35 and R2_Zn: 0.26–0.67). The results indicate that PLSR provides a more robust estimation than the user-friendly RFR method. Additionally, the PTE estimation performance in strong heterogeneous soil samples can be improved by pre-treatment of soil samples in the laboratory. Second, we cultivated Brassica juncea in a greenhouse and applied the plants with different controlled zinc, nickel and copper concentration levels (low, medium, high). Measurements with a HySpex VNIR-SWIR hyperspectral sensor (408-2500 nm) and a point spectrometer PSR+ from Spectral Evolution (350-2500 nm) were conducted in-situ and in the laboratory. A principal component analysis (PCA) was performed on reflectance spectra to identify and visualize spectral changes with increasing PTE uptake. In addition, different indices were calculated, such as Leaf Area Index (LAI) and Red-Edge Inflection Point (REIP). First results revealed changes at the chlorophyll feature between 500-600 nm and at the REIP position with increasing PTE concentration. Further spectral features and indices will be investigated to check hyperspectral responses of PTE concentration. With reflectance imaging we are already able to detect differences of the PTE accumulation within the hyperaccumulator plants. Y1 - 2022 UR - http://is.earsel.org/workshop/12-IS-Potsdam2022/wp-content/uploads/2022/06/programm-booklet_long_complete_v2.pdf SP - 152 ER - TY - GEN A1 - Bayuzick, Samuel A1 - Guarin, Daniel A1 - Bonhage, Alexander A1 - Hirsch, Florian A1 - Diefenbach, Duane A1 - McDill, Marc A1 - Raab, Thomas A1 - Drohan, Patrick J. T1 - Small anthropogenic landforms from past charcoal production control moisture dynamics and chemistry in northcentral Appalachian soils T2 - Geomorphology N2 - Throughout the northeastern United States (U.S.) and Europe, relict charcoal hearths (RCHs) are regularly being discovered in proximity to furnaces once used for the extraction of metal from ore or quick-lime production; charcoal produced in hearths was used as a furnace fuel. Given previous research has shown that topographic and subsurface disturbance can be great when a hearth is constructed, we hypothesize that hearth construction alters surface hydrology and soil chemistry in environments in and near hearths. We used a landscape classification process to identify 6758 hearths near furnaces at Greenwood and Pine Grove Furnace State Park, central and southcentral Pennsylvania, U.S. Two types of digital elevation model wetness indexes were used to quantify surface hydrology effects in and around hearths. Modeled wetness conditions were compared to field soil volumetric water content in RCHs near Greenwood Furnace State Park. Modeled wetness indexes indicate that RCH interiors are significantly wetter than RCH rim areas; RCHs are acting as a landscape moisture sink. Results also indicate that RCHs on slopes result in downslope drier conditions below RCHs. Field measured volumetric water content indicates that as distance from the center of the hearth increases, soil moisture significantly decreases. Geomorphic position was found to not be related to RCH wetness. Soil from RCHs, compared to nearby native soils, has significantly higher total C, a lower Mehlich 3 extractable acidity, higher Ca and P. No trend was evident with RCH soil chemistry and geomorphic position. The high frequency of RCH occurrence, in proximity to the furnace's RCHs supported, suggests that RCHs today could locally be an important niche for understory flora and fauna. Further research could explore how RCHs might be affecting surrounding plant populations and how within RCH patterns, especially on hillslopes, might represent a distinctly different scale of physical and chemical variability. Y1 - 2022 UR - https://www.sciencedirect.com/science/article/pii/S0169555X22002720 U6 - https://doi.org/10.1016/j.geomorph.2022.108379 SN - 1872-695X VL - 415 SP - 1 EP - 11 ER - TY - GEN A1 - Bayuzick, Samuel A1 - Guarin, Daniel A1 - Benavides, Jhony A1 - Bonhage, Alexander A1 - Hirsch, Florian A1 - Diefenbach, Duane A1 - McDill, Marc A1 - Raab, Thomas A1 - Drohan, Patrick J. T1 - Soil and geomorphic patterns within relict charcoal hearths could represent unique ecosystem niches T2 - Geomorphology N2 - Hearths used for 19th and 20th century charcoal manufacturing have been found to have unique plant communities or to produce unique growth characteristics for some species but not others. Given known differences in hearth morphology, within hearth physical and chemical differences may exist and result in unique ecologic niches. We examined soil stratigraphy across 8 relict charcoal hearths (RCH) and control soils on different landforms near a 19th century furnace complex (Greenwood Furnace, northcentral Appalachians USA). Soils were analyzed for particle size, total and trace elements, and fertility. Platform creation resulted in soils from upslope RCH positions mixed with subsurface materials on the downslope side to create a stabilized platform. The thin, uniform thickness of charcoal surface horizons (Ac) indicate that RCHs were not used more than once for charcoal manufacturing or that charcoal was always removed very efficiently. While rubification of soil or rock from high heat was seen in 6 of 8 sites sampled, it was not extensive across sampled areas of any one hearth, which indicate hearth use may not be frequent, hot enough, or spatially disparate. Soil fertility characteristics change within RCHs but also by landscape position. Downslope RCH positions are enriched in some parameters compared to control soils (total C, Mehlich 3 Mg, Ca, and Aquia Regia digestion Mn) and that enrichment often is from the surface downward. Downslope enrichment within RCH soils may have occurred from charcoal and released ions, slope erosion and accumulation, or transportation of constructed materials during RCH creation. Landscape position may accentuate or mute soil chemistry differences. Greenwood Furnace RCHs have unique patterns of chemistry, which could result in unique niches for flora and maybe fauna within RCH. Future research could more closely investigate whether hearths support unique species assemblages and how they may play a role in enhancing today’s forest biodiversity. Y1 - 2023 UR - https://www.sciencedirect.com/science/article/pii/S0169555X22004184 U6 - https://doi.org/10.1016/j.geomorph.2022.108525 SN - 1872-695X VL - 422 SP - 1 EP - 16 ER - TY - GEN A1 - Grandas Tavera, Camila A1 - Raab, Thomas A1 - Holguin Trujillo, Laura T1 - Valorization of biogas digestate as organic fertilizer for closing the loop on the economic viability to develop biogas projects in Colombia T2 - Cleaner and Circular Bioeconomy N2 - This study aims to find the best digestate valorization pathway in the Colombian context in order to foster biogas (BG) projects' economic viability and their sustainability. The GICON's BG power plant is intended to treat 19,710 t/y of fruit and vegetable wastes (FVW) from local wholesale markets in Cali, Colombia. Experimental feedstock and digestate characterization carried by Universidad ICESI and CIAT, integration of mass, energy, and nutrient balances of residues with the methodological approach based on structural analysis and expert's survey allowed further assessment of the BG project's economic viability on the proposed digestate valorization framework. Results suggested a significant profit by selling treated digestate through the vacuum evaporation (VE) technology. VE concentrated 27% of nitrogen, 18% of phosphorus, and 33% potassium of the feedstock. Furthermore, it reduced the volume of water, facilitating product transportation and making the product commercially attractive. This alternative exhibited the highest revenue for the BG project, and its expenses were slightly higher than the ones calculated for raw and separated digestate. Also, a positive return of the investment and financially worthiness could be expected, making the project economically feasible. These results provide a useful tool to evaluate future events and serve as a reference to support the BG project's viability by integrating them with the BG project's financial model and adapt the required conditions for desirable technologies. Y1 - 2023 UR - https://www.sciencedirect.com/science/article/pii/S2772801322000318?via%3Dihub U6 - https://doi.org/10.1016/j.clcb.2022.100035 VL - 4 ER - TY - CHAP A1 - Roß, Christina-Luise A1 - Raab, Thomas ED - Blume, Hans-Peter ED - Felix-Henningsen, Peter ED - Frede, Hans-Georg ED - Guggenberger, Georg ED - Horn, Rainer ED - Stahr, Karl T1 - Auswirkungen auf biologische Bodeneigenschaften T2 - Handbuch der Bodenkunde N2 - Die Ausbringung von abbaubarem organischem Material wirkt sich in den meisten Fällen positiv auf die biologische Aktivität sowie die Vielfalt der mikrobiellen Arten (Bakterien und Eukaryoten) im Boden aus. Grundsätzlich gilt dies auch für Bioabfälle, allerdings lassen sich kaum generelle Aussagen treffen, da die Wirkung auf das Bodenleben zu stark von der Qualität des Abfalls abhängt. Einige Bioabfallarten, z. B. aus der Olivenölgewinnung, können zudem ganz spezielle Probleme mit sich bringen, die eine Anwendung als Düngeprodukt oder Bodenhilfsstoff erschweren oder vollständig ausschließen. Insbesondere kommunale Abfälle können außerdem Plastik enthalten, das durch Abrieb und Zerkleinerung zu Partikeln zerfällt, die von Bodenorganismen unabsichtlich aufgenommen Zusammenfassung Die Ausbringung von abbaubarem organischem Material wirkt sich in den meisten Fällen positiv auf die biologische Aktivität sowie die Vielfalt der mikrobiellen Arten (Bakterien und Eukaryoten) im Boden aus. Grundsätzlich gilt dies auch für Bioabfälle, allerdings lassen sich kaum generelle Aussagen treffen, da die Wirkung auf das Bodenleben zu stark von der Qualität des Abfalls abhängt. Einige Bioabfallarten, z. B. aus der Olivenölgewinnung, können zudem ganz spezielle Probleme mit sich bringen, die eine Anwendung als Düngeprodukt oder Bodenhilfsstoff erschweren oder vollständig ausschließen. Insbesondere kommunale Abfälle können außerdem Plastik enthalten, das durch Abrieb und Zerkleinerung zu Partikeln zerfällt, die von Bodenorganismen unabsichtlich aufgenommen werden können. Hinsichtlich Abundanz und Diversität der Mikroorganismen ist der Nährstoffgehalt des Bioabfalls eine wesentliche Steuergröße. Von besonderer Bedeutung sind dabei Stickstoff, Phosphor, Kalium und Kohlenstoff. Die Applikation organischer Reststoffe als Dünger kann auch einen entscheidenden Beitrag zur Förderung von Nützlingen und zur Bekämpfung von schädlichen Makro- und Mikroorganismen leisten, da physikalische und chemische Bodeneigenschaften so verändert werden, dass günstige Bedingungen für erwünschte detritivore Gemeinschaften und sonstige Nützlinge entstehen. Zum Teil werden die Nützlinge sogar direkt mit dem organischen Material eingetragen, und Schädlinge können so durch Konkurrenz oder Prädation zurückgedrängt werden oder finden keine geeigneten Lebensbedingungen mehr vor. Krankheitserreger sind in organischen Abfällen reichlich vorhanden, mittels Pasteurisierung (1 h bei 70 °C) werden die meisten Humanpathogene jedoch abgetötet. Damit wird ein direktes Gesundheitsrisiko nahezu ausgeschlossen und der zunehmenden Verbreitung von bakteriellen Antibiotikaresistenzgenen in der Umwelt entgegengewirkt. Y1 - 2023 UR - https://onlinelibrary.wiley.com/doi/10.1002/9783527678495.hbbk2021008 SN - 978-3-527-32129-2 U6 - https://doi.org/10.1002/9783527678495.hbbk2021008 SP - 1 EP - 19 PB - Wiley-VCH CY - Weinheim ER -