Grazing Affects Soil Organic Carbon Stocks Directly and Indirectly Through Herbaceous Species Diversity in Sahelian Savanna Ecosystems DOI Creative Commons
Haftay Hailu Gebremedhn, Simon Taugourdeau, Sylvanus Mensah

et al.

Land Degradation and Development, Journal Year: 2025, Volume and Issue: unknown

Published: March 19, 2025

ABSTRACT The impact of livestock grazing on soil organic carbon (SOC) stocks in the Sahel has been poorly documented due to a lack data from different intensities. This study evaluated SOC under four intensities within 0–30 cm depth dry savanna ecosystems Senegal. It also examined possible indirect relationships between and through herbaceous species diversity, biomass, carbon–nitrogen ratio. Four sites representing high, moderate, light, no intensity levels were selected. Transect survey methods used for sampling vegetation each sites. Data analyzed using mixed‐effects models piecewise structural equation modeling (pSEM). significantly among intensities, higher observed with increased intensity. Furthermore, high‐intensity was shown reduce ratio by negatively affecting diversity species, which indirectly promoted stocks. In conclusion, this found that both directly diversity.

Language: Английский

Land use intensity is a major driver of soil microbial and carbon cycling across an agricultural landscape DOI Creative Commons
Alexa K. Byers, Leo M. Condron, Steven A. Wakelin

et al.

Soil Biology and Biochemistry, Journal Year: 2024, Volume and Issue: 196, P. 109508 - 109508

Published: June 26, 2024

Soil carbon (C) storage is a critical ecosystem function that underpins human health and well-being. The acceleration of human-driven land use change, such as agricultural intensification, major driver soil C loss globally. Developing sustainable practices enhance productivity whilst protecting essential functions vital. microbiome has role in regulating biogeochemical cycling processes, including cycling. Examining the impacts intensity on enables us to assess potential effects long-term stocks. Using metagenomic DNA sequencing phospholipid fatty acid analysis, we investigated differences activity, diversity, associated with five contrasting uses across an landscape. covered gradient disturbance intensities included remnant native forest, regenerating bush, exotic plantation dryland pasture, irrigated pasture. We identified pronounced each use, diversity abundance microbial nitrogen (N) genes. Notably, intensive had significantly higher C-degrading genes, forest lowest Our findings suggest may increase functional mineralize C, potentially resulting greater respired CO2 into atmosphere. This research be used support development management promote persistence landscapes, protection fragments incorporation vegetation.

Language: Английский

Citations

10
New Approach to Experimental Soil Health Definition Using Thermogravimetric Fingerprinting DOI Creative Commons
Ina Krahl, David Tokarski, Jiří Kučerík

et al.

Agronomy, Journal Year: 2025, Volume and Issue: 15(2), P. 487 - 487

Published: Feb. 18, 2025

Degradation and sealing are still frequent in soil management today despite intensive research. An unsatisfactory assessment of key components health limits sustainable land use. For the future evaluation health, soils under productive use have been compared with natural semi-natural using thermogravimetric fingerprinting air-dried samples. This approach has led to a more precise quantification known relationships discovery several new ones between that evolved over thousands years formation without human intervention, each changing specific way due The use-related deviations from condition allow distinction soils, disturbed soil-like carbon-containing mineral mixtures (e.g., compost, horticultural substrates). Carbon added fresh organic residues or anthropogenic (soot, slag) geological (coal) sources can be distinguished matter (humus) accumulated during genesis, regardless extreme chemical heterogeneity. degree carbon sequestration is easy quantify. Using near-natural as reference, considering bound water seems suitable starting point for experimental definition health. elucidation causal used should accompany it.

Language: Английский

Citations

1
QGIS-based modeling and analysis of urban dynamics affecting land surface temperature towards climate hazards in coastal zones of Portugal DOI Creative Commons
Öznur Işınkaralar

Natural Hazards, Journal Year: 2024, Volume and Issue: 120(8), P. 7749 - 7764

Published: March 20, 2024

Abstract Climate risk creates considerable concern due to the density of natural and socio-economic assets in coastal areas. Monitoring land use/cover changes, detecting population growth, analyzing their impact on surface temperature (LST) are necessary for effective urban management. In this study, use/land cover (LULC), population, LST changes regions Portugal. Moderate Resolution Imaging Spectroradiometer (MODIS) satellite imagery was examined using World Bank CORINE data. Changes use types values from 1990 2018 were analyzed. At same time, LULC predictions made Modules Land Use Change Simulation (MOLUSCE) plug-in included QGIS software, projections analyzed with 2046. The results show significant temperatures. It has been demonstrated that green water areas can effectively cool cities. between 2018, Leiria region stands out, an annual increase 4.04% built 121.58 259.06 km 2 . According simulations 2046, it predicted 18.74% agricultural 14.43% forest would be transformed into environments. study is also essential as confirms MOLUSCE applied simulation a large regional scale.

Language: Английский

Citations

8
Soil carbon maintained by perennial grasslands over 30 years but lost in field crop systems in a temperate Mollisol DOI Creative Commons
Clarissa L. Dietz, Randall D. Jackson, Matthew D. Ruark

et al.

Communications Earth & Environment, Journal Year: 2024, Volume and Issue: 5(1)

Published: July 3, 2024

Abstract To mitigate climate change, some seek to store carbon from the atmosphere in agricultural soils. However, our understanding about how agriculture affects soil organic is muddied by studies (1) lacking longitudinal data, (2) ignoring bulk density changes, or (3) sampling only surface better understand trends, here we measured changes over 30 years density-corrected, full-soil-depth (90 cm) stocks under 6 cropping systems and a restored prairie Mollisol of southern Wisconsin, USA. Cash-grain alfalfa-based lost carbon. Prairie rotationally-grazed pasture maintained Average losses for cash-grain were −0.80 (±0.12) −0.54 (±0.13) Mg C ha −1 yr , respectively. Sensitivity analysis showed that incomplete methodologies overestimated improvements. Our findings using more comprehensive methods demonstrate inadequacy row-crop need well-managed grasslands protect productive soils Upper Midwest

Language: Английский

Citations

7
Carbon Farming practices assessment: Modelling spatial changes of Soil Organic Carbon in Flanders, Belgium DOI
Stefano Spotorno, Anne Gobin, Fien Vanongeval

et al.

The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 922, P. 171267 - 171267

Published: Feb. 27, 2024

Language: Английский

Citations

6
Role of cover crop roots in soil organic carbon accrual—A review DOI Creative Commons
Martin Pisarčik, J. Hakl, Monika Toleikienė

et al.

European Journal of Soil Science, Journal Year: 2024, Volume and Issue: 75(4)

Published: July 1, 2024

Abstract Appropriate cover crop (CC) management is an important tool for the improvement of soil carbon stock; however, relationships between accumulation and CC root traits remain unclear. A literature review was performed to identify extent focus recent research answer questions about role CCs in C with regard species selection, mixture composition agronomic management. The findings based on analysis 69 publications show that a range such as biomass, architecture, depth rooting, chemical composition, well quantity quality rhizodeposition, can contribute structure formation accumulation. These are usually specific, it seems appropriate combinations mixtures offer highest potential optimization stock across various environments. However, there has been twice much roots monocultures than mixtures, little attention paid aspects plant spatial arrangement or tillage relation development. Considerations real under field conditions could be beneficial providing greater accuracy estimation contribution increasing SOC croplands.

Language: Английский

Citations

5
Impact of elevated CO2 on soil microbiota: A meta-analytical review of carbon and nitrogen metabolism DOI
Maryam Tariq, Yuexian Liu, Rizwan Ali

et al.

The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 950, P. 175354 - 175354

Published: Aug. 6, 2024

Language: Английский

Citations

5
Impact of bare fallow management on soil carbon storage and aggregates across a rock fragment gradient DOI Creative Commons
Steffen Schweizer, Michaela Aehnelt, Franziska B. Bucka

et al.

Journal of Plant Nutrition and Soil Science, Journal Year: 2024, Volume and Issue: 187(1), P. 118 - 129

Published: Jan. 14, 2024

Abstract Background Our understanding of C storage in soils lacks insights investigating organic matter (OM) depletion, often studied bare fallow systems. The content coarse rock fragments is excluded, whereas it may affect storage. Aims We aim to contribute a better the impact on mechanisms soil as influenced by its fragment contents. investigated whether induced depletion OM fractions and analyzed which extent this affected aggregate size distribution loading clay‐sized fraction. Methods A comparison 14 years management with adjacent cropped located Selhausen (Germany) provided gradient 34%–71%, from sites three different fine earth (FE) contents were compared. Across FE gradient, we isolated particulate mineral‐associated fractions, obtained microaggregate macroaggregate quantified loading. Results Bare an at lower FE. There, influence was more concentrated onto less volume. contribution both low‐FE decreased. increased under fallow, compared soil. In soil, also found macroaggregates, decreased some fractions. Conclusions high can enhance decreasing fallow.

Language: Английский

Citations

4
Manure increases soil organic carbon most when allocated to annual cropping DOI Creative Commons
Juuso Joona, Eero Liski, Helena Kahiluoto

et al.

CATENA, Journal Year: 2024, Volume and Issue: 238, P. 107844 - 107844

Published: Jan. 26, 2024

Soil carbon sequestration has a great potential in climate change mitigation. To maximise stocks northern agricultural soils, the determinants of manure application are crucial. We quantified effect on soil organic (SOC) depending rate, proportion leys relative to annuals crop rotation, and texture. compared steady-state SOC concentration under farm-yard control treatment with no based 56 individual long-term experiments at 27 locations north 50 degrees latitude. At low rate such as 0.7 Mg C/ha/y, gradually increased increasing ley proportions. moderate 1.3 an increase led decreasing growth of, or even decrease in, SOC. fixed rotation 20 %, linearly rate. As increased, saturation occurred certain When sandy soils more than once out seven years clay was higher 45 accrual. Compared absence application, high rates decreased conclude that maximises accrual topsoil. The most effective regard landscape can be determined using statistical model we developed, management system

Language: Английский

Citations

4
Relative and absolute difference in soil organic carbon stocks in grassland soils in Ireland: Impact of rock fragments, bulk density and calculation methods DOI Creative Commons
Owen Fenton, Giulia Bondi,

Conor Bracken

et al.

Geoderma Regional, Journal Year: 2024, Volume and Issue: 36, P. e00769 - e00769

Published: Jan. 30, 2024

On-farm management measures can sequester carbon by removing dioxide from the atmosphere and storing it securely for long periods, in our soils. Estimates of soil organic (SOC) stocks differ calculation methods terms how they account coarse >2 mm fraction (i.e. rock fragments) soil. Irish grassland soils have variable volumetric stone contents extent overestimation is unknown. Without best practice guidance, calculations SOC these are vulnerable to overestimation. The objectives present study Ireland were to: 1) calculate mean using different horizon content class; 2) highlight relative differences between 3) compare normalised layer (Ly, fixed depth) versus (Hz) type derived sampling data stocks, establish a standardised protocol. Five (M, 1–3 overestimate whereas 4–5 equivalent closest reality) used combination with three databases i.e. Soil Information System (I-SIS), Heavy Soils Programme (HSP) Quality Assessment Research Project (SQUARE). Objectives 1 2 assessed all across methods, objective 3 SQUARE database M4. These sorted into (%) classes (< 5%, 5–10%, 10–20%, 20–30% > 30%) (O, A, E, A/B, B, B/C, C) calculated M1–5 equations. Results confirmed high assumption (exception O horizons). Volumetric ranged 0% 36% horizons. When considered average difference M1 M5 was 18.9% (max: 388%), M2 7.7% 60.7%) M3 8.9 310%). In Ly Hz sampling, no significant found specifically A horizons sampled. Ireland, should utilise elements both (using auger depth specific OC sampling) pit BD approaches field. Laboratory must fit needs equations M4/5 stocks.

Language: Английский

Citations

4