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264 results for “soil organic carbon”
Contribution of wheat and maize to soil organic carbon in a wheat-maize cropping system: a field and laboratory study
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Data from: Microbial carbon use efficiency and soil organic carbon stocks across an elevational gradient in the Peruvian Andes
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More soil organic carbon is sequestered through the mycelium-pathway than through the root-pathway under nitrogen enrichment in an alpine forest
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Data from: Loamy sand soil approaches organic carbon saturation after 37 years of conservation tillage
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Hierarchical drivers shaping the global patterns of soil organic carbon
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Organo-organic interactions dominantly drive soil organic carbon accrual
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Effects of land clearing for agriculture on soil organic carbon stocks in drylands: A meta-analysis
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Protists regulate microbially-mediated organic carbon turnover in soil aggregates
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Data from: More than a decade of moderate grazing: No impact on soil organic carbon stocks and enhancement of mineral-associated organic carbon via livestock diversification
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Cropland management impacts on soil organic carbon stock changes in US croplands from 1990 to 2015
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Drivers of soil organic carbon stock during tropical forest succession
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Data from: Wildfire-induced losses of soil particulate and mineral-associated organic carbon persist for over four years in a chaparral ecosystem
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Biochar mitigates microplastic-induced Destabilization of soil organic carbon via molecular Recalcitrance and microbial process regulation
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Spatial heterogeneity and environmental predictors of permafrost region soil organic carbon stocks
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Vegetation cover and Soil Organic Carbon along gradients of cattle grazing intensity in the Jornada Basin, July-August 2016
The goal of this Master’s thesis project, which was carried out in July and August of 2016, was to assess the effect of inferred grazing intensity on 1) vegetation cover type and 2) soil organic carbon (SOC) at the Jornada Experimental Range in southern New Mexico. A sampling transect was established at each of 3 long term cattle water sources (85-106 years old), beginning 5m from the water source and continuing 1500m outward. Soil bulk density, soil organic carbon, soil organic nitrogen, and dominant plant cover type (shrub, grass, and bare soil) were sampled at 20 locations on each transect. Two hypotheses evaluated in this study are: 1) higher grazing pressure near the water source will lead to reduced vegetation cover and C inputs into the soil, leading to higher SOC stocks in soil with far proximity to the water source; and 2) Grazing very close to the water source will exert high disturbance and deposit SOC via defecation, leading to higher SOC stocks in soil with close proximity to the water source.
Soil organic carbon accumulation modes between pioneer and old-growth forest ecosystems
<p>1. Increasing evidence suggests that high biomass and litterfall do not necessarily bring about soil organic carbon (SOC) sinks, contrary to the assumption that higher litterfall implies higher SOC when designing carbon models. The underlying mechanism is related to the quality of litter. 2. We conducted 15 years (2000–2015) of consecutive field measurements of δ13C values in SOC and plants in a pioneer forest (Pinus massoniana forest, PF) and an old-growth forest (monsoon evergreen broadleaved forest, BF), using an isotope mixing model based on mass balance to quantify the effects of vegetation on SOC stock and soil characteristics. 3. The carbon to nitrogen (C/N) ratio of litter in BF was lower than that in PF. The proportion of organic carbon yield input to the soil (Cinput) to the total litter carbon loss during decomposition was 38.7 ± 3.3% and 28.0 ± 2.1% in BF and PF, respectively. New carbon input was higher in BF (148.7 ± 8.8 g C m−2 yr−1) than PF (99.7 ± 4.5 g C m−2 yr−1), though there was a non-significant difference in annual litterfall between the two forests. Moreover, the Cinput was concentrated in the topsoil layer in PF but distributed in a more dispersed state across the whole soil profile in BF. Consequently, only the δ13C values of SOC decreased in the topsoil layer of PF, whereas these decreased at both soil depths in BF from 2000 to 2015. 4. Compared with PF, BF exhibited higher carbon input and a more favourable soil environment for carbon storage. It was the amount of intermediate product (i.e., Cinput) of litter decomposition, not the amount of litterfall itself, that drove the contrasting differences in SOC status. 5. Synthesis and applications. Litter quality controls SOC accumulation by regulating the fate of decomposing litter, which may explain why old-growth forests can sustainably accumulate carbon in soil. This finding questions the carbon models that predict the dependence of SOC accumulation on biomass and litter yield and suggests that litter quality should be valued in future carbon cycling models.30-Jul-2020</p>
Detailed global modelling of soil organic carbon in cropland, grassland and forest soils
<p>Supporting information of the paper: Morais, T.G., Teixeira, R.F.M., Domingos, T. 2019. Detailed global modelling of soil organic carbon in cropland, grassland and forest soils. PloS One.</p> <p>Version 2 includes raster files (.tif) for each land use class (including: Attainable SOC stock, mineralization rate, and fator K).</p>
Soil organic carbon distribution for 0-3 m soils at 1 km2 scale of the frozen ground in the Third Pole Regions
<p>Soil organic carbon (SOC) is very important in the vulnerable ecological environment of the Third Pole; however, data regarding the spatial distribution of SOC are still scarce and uncertain. Based on multiple environmental variables and soil profile data from 458 pits (depth of 0–1 m) and 114 cores (depth of 0–3 m), this study uses a machine-learning approach to evaluate the SOC storage and spatial distribution at different soil depths (0–30 cm, 0–50 cm, 0–100 cm, 0–200 cm, and 0–300 cm) in the frozen ground area of the Third Pole region. Our results provide information on the storage, patterns, and environmental controls of SOCSs at a 1 km<sup>2</sup> scale for areas of frozen ground in the Third Pole region, thus providing a scientific basis for future studies pertaining to Earth system models.</p> <p>Soil organic carbon data is stored in grids format, and the file name is "TP-SOC-d.tif", where d represents soil depth, for example, "TP-SOC-30.tif" represents the spatial distribution of soil organic carbon stocks in the Third Pole regions of the upper 30 cm depth interval.</p> <p> </p>
Soil organic carbon in drylands: shrub encroachment and vegetation management effects dwarf those of livestock grazing
Dryland ecosystems occur worldwide and play a prominent, but potentially shifting, role in global biogeochemical cycling. Widespread woody plant proliferation, often associated with declines in palatable grasses, has jeopardized livestock production in drylands and prompted attempts to reduce woody cover by chemical or mechanical means. Woody encroachment also has the potential to significantly alter terrestrial carbon storage. However, little is known of the long-term biogeochemical consequences of woody encroachment in the broader context of its interaction with common dryland land uses, including "brush management" (woody plant clearing) and livestock grazing. Present assessments exhibit considerable variation in the consequences of these land use/land cover changes, with evidence that brush management may counteract sizeable impacts of shrub encroachment on soil biogeochemical pools. A challenge to assessing the net effects of brush management in shrub-encroached grasslands on soil organic carbon (SOC) and total nitrogen (N) pools is that land management practices are typically considered in isolation, when they are co-occurring phenomena. Furthermore, few studies have assessed spatial patterns in brush management and how these are affected in decades following treatment on sites with contrasting grazing histories. To address these uncertainties and interactions, we quantified the impacts of shrub encroachment and their subsequent mortality resulting from brush management (herbicide application) on SOC and N pools in a Sonoran Desert grassland where long-term grazing manipulations (>100 y) co-occur with shrub encroachment and brush management. Pools of SOC and N associated with herbicided shrubs declined markedly over ~40 years, offsetting 66% of the increases from shrub encroachment. However, spatial patterns in SOC induced by shrubs persisted over the decades following brush management. Century-long protection from grazing did little to change SOC and N pools. Accordingly, shrub encroachment and shrub mortality from brush management each far outweighed livestock grazing impacts. Consideration of the patterns of SOC and N through space (e.g., bole-to-dripline gradients), time (e.g., shrub age/size), land use (e.g., livestock grazing and brush management) and their interactions will position us to improve predictions of SOC and N responses to land use/land cover change, inform C-based management decisions, and objectively evaluate trade-offs with other ecosystem services.
Abrupt loss of soil organic carbon following disturbance in seagrass ecosystems
<h1><strong>Code for running the bifurcation diagrams and the sensitivity analysis of seagrass-soil model</strong></h1> <p> </p> <p>Contact: antoine.levilain18@gmail.com</p> <p> </p> <p>This repository contains the code used to conduct the figures of: Abrupt loss of soil organic carbon following disturbance in seagrass ecosystems. Each figure from the related study has its own folder, which includes the necessary scripts to rerun simulations, the output of those simulations, and the code to plot the results. By navigating to any figure’s folder, you can reproduce the simulations and visualise the results. The repository is organised to facilitate reproducibility and further exploration of the ecosystem model and its behavior under various scenarios.</p> <p>We performed our analysis using R version 3.6.3.</p> <p>Do not forget to add your working directory if you want to save the figures.</p> <p> </p> <h2>Sensitivity analysis (Figure 5, Figure S11, Figure S15 & Figure S16)</h2> <p>The “sensitivity” folder contains subfolders with the scripts required to run the global sensitivity analysis using the Sobol method for each scenario/case, along with the resulting outputs. In this analysis, higher numbers in folder names indicate a more deteriorated meadow, meaning it’s closer to the point of collapse. The analysis was conducted across different scenarios for different cases: “f” denotes the feedback case, while “no_f” represents the no feedback case. To recreate the figures, you can plot the pie charts for each scenario/case by running the sensitivity_plot.R script after setting the working directory to the appropriate subfolder.</p>
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Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
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DANDI Archive for NWB datasets
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International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.