Biochar is a carbon-rich material that increases soil C sequestration and mitigates climate change. However, due to the variability of experimental conditions, types of biochar and soil, the influence of biochar on the accumulation of different soil carbon fractions remains unclear. Therefore, a meta-analysis was performed that included 586 ...

Understanding the soil organic matter (SOM) dynamics in forest ecosystems is important because soils are the largest pool of carbon (C) on Earth [6,7].As a key ecological process responsible for the transfer of organic matter from vegetation to soil, plant litter decomposition plays a critical role in global C cycling [8,9,10].Plant …

Abstract. The increasing concentration of CO 2 in the atmosphere is perturbing the global carbon (C) cycle, altering stocks of organic C, including soil …

The transport of dissolved organic carbon from land to ocean is a large dynamic component of the global carbon cycle. Inland waters are hotspots for organic matter turnover, via both biological ...

Despite the size of the potentially deeply subducted organic C reservoir, its fate in subducting sections remains largely unexplored, with most attention paid to release of carbonate C.To characterize the forearc behavior of organic C, metamorphosed to pressures and temperatures as high as 3.0 GPa and 600˚C, reduced C concentrations …

Wollastonite addition stimulates soil organic carbon mineralization: Evidences from 12 land-use types in subtropical China - ScienceDirect. CATENA. …

Reduced Lignin Decomposition and Enhanced Soil Organic Carbon Stability by Acid Rain: Evidence from 13 C Isotope and 13 C NMR Analyses. by. Jianping Wu. 1,2, Qi Deng. 2,3,*, Dafeng Hui. 4, Xin Xiong. …

Here, we present analyses of multiple high-resolution TOC and stable organic carbon isotope (δ 13 C org) records from the middle to high latitudes during the past 100 Ma ( …

In high N and low C sediments, studies have often found that the availability of organic carbon becomes a limiting factor for denitrification processes (Grebliunas and Perry, 2016). For headwater river ecosystems, the confluence of surface or subsurface runoff into rivers is often accompanied by higher terrestrial C source inputs and lower N ...

3.1. Organic carbon and mercury isotopes analyses. The organic carbon isotopic ratios are expressed as δ 13 C org, representing per mil (‰) deviation of 13 C/ 12 C ratios in samples from the international standard Vienna Pee Dee Belemnite (VPDB). Before carbon isotope analysis, bulk samples were soaked in 1 mol/L HCl solution to remove …

The mechanisms by which lime and/or phosphate addition impacts the preservation of soil organic matter (OM) are poorly understood. We explored the changes in quantity and chemistry of water-extractable organic matter (WEOM) in the bulk soil and its heavy density fraction (>1.6 g/cm 3) of an unmanaged C-rich volcanic soil caused by …

The cycle of organic carbon through the atmosphere, oceans, continents and mantle reservoirs is a hallmark of Earth. Over geological time, chemical exchanges between those reservoirs have...

PDF | On May 1, 2023, Yongxue Yan and others published Wollastonite addition stimulates soil organic carbon mineralization: Evidences from 12 land-use types in subtropical China | Find, read and ...

Recycling of organic carbon to the surface ... Bachan, A. & Kump, L. R. Sulfur and carbon isotopic evidence for metabolic pathway evolution and a four-stepped …

There is considerable discussion and uncertainty in the literature regarding the importance of fresh litter versus older soil organic matter as sources of soil dissolved organic carbon (DOC) in forest floor. In this study, the differences of organic carbon concentration and stable isotope composition were analyzed under different background …

Organic carbon sequestration in marine sediments is a major control on atmospheric CO 2 and O 2 concentrations over geological time (Berner 2003), while being a poorly constrained pathway of contemporary carbon burial (Regnier et al 2022).The majority (approximately 90%) of organic carbon deposited at the global seafloor is …

The highest total organic carbon (TOC) content was mostly observed in the mA (microaggregates, 0.053–0.25 mm) fractions in the three ecosystems. Particulate organic carbon (POC) content was higher than mineral-associated organic carbon (MAOC) content of aggregates. Pores of < 15 μm served as indirect indicators for SOC …

The top two metres of soils store more than 2,200–2,500 Pg of organic carbon (C) 1,2, representing the largest biologically active C pool in terrestrial ecosystems 3.The size of this C reservoir ...

The Woodford Shale core recovery is 41 m thick in the Wyche core, 11 m thick in the East Fitts core and 15 m thick in the Chitwood–Harris core (Fig. 1), and is primarily composed of organic rich shale (Fig. 2 f) with intermittent chert intervals (1–10 cm thick) as well as more silty intervals.All sediments lack evidence of storm-wave reworking …

We determined soil organic carbon (SOC) accumulation rates and stability in the initially C-free model soils. Across all model soils, SOC increased consistently over time (P<0.05; Table 1).

For example, vegetation restoration can improve soil organic carbon storage, soil aggregate stability, and soil and water conservation (Liu et al., 2019). Returning farmland to forest can increase organic carbon storage by 20–50%, but converting forest to farmland can reduce organic carbon storage by ∼ 40% (Guo and Gifford, 2002).

Soil organic carbon (SOC) turnover is a key parameter in the terrestrial ecosystem model and ecosystem management (Tan et al., 2020), and SOC pool is the largest terrestrial C reservoir (Amundson, 2001). Thus, the changes in SOC turnover caused by decreased N deposition might significantly affect global C cycle and further …

Sulfate-driven anaerobic oxidation of methane (AOM) limits the release of methane from marine sediments and promotes the formation of carbonates close to the seafloor in seepage areas along continental margins. It has been established that hydrocarbon seeps are a source of methane, dissolved inorganic carbon, and dissolved …

1 Wollastonite addition stimulates soil organic carbon mineralization: Evidences from 12 land- 2 . use types in subtropical China . 3 . Yongxue Yan . a, b, d, 1 ...

The impact of climate change on the stability of soil organic carbon (SOC) remains a major source of uncertainty in predicting future changes in atmospheric CO 2 levels. One unsettled issue is whether the mineralization response to temperature depends on SOC mineralization rate. Long-term (>25 years) bare fallow experiments (LTBF) in …

Soils store more carbon (C) belowground than plants and the atmosphere combined, providing a critical ecosystem service. While previous research has shown that sustainable forest management practices can increase soil C storage by enhancing plant productivity, the role of soil microbes remains elusive. We analyzed changes in plant …

Soil dissolved organic carbon increased from 257.41 mg kg −1 in the control to 354.26 mg kg −1 in the moderate thinning (MT) (Fig. 1b). Thinning also significantly promoted microbial biomass carbon from 172.62 mg kg −1 in the control to 247.40 mg kg −1 in MT (P < 0.05; Fig. 1c). Compared to the control, HT significantly reduced soil ...

Dissolved organic matter, Abstract. The record-setting wildfires that ravaged the western United States throughout 2020 released high concentrations of …

Despite considerable research, predicting how soil organic carbon (SOC) in grain production systems will respond to conservation management practices, such as reduced tillage, residue retention and alternative rotations, remains difficult because of the slowness of change and apparent site specificity of the effects. We compared SOC …

Heavy thinning (HT) significantly reduced SOC by an average of 39.15% relative to CK, however, other thinning treatments did not change SOC (Fig. 1 a).Soil dissolved organic carbon increased from 257.41 mg kg −1 in the control to 354.26 mg kg −1 in the moderate thinning (MT) (Fig. 1 b). Thinning also significantly promoted microbial …

However, direct evidence of high organic carbon export fluxes to the early Cambrian seafloor is lacking, so a key test of the "organic carbon burial hypothesis" for the Cambrian Explosion has not been undertaken to date. Both Mo (δ 98 Mo) and U isotopes (δ 238 U) in organic-rich black shales have been used to track local and global …

INTRODUCTION. Recycling of organic matter in sediments is an important component of biogeochemical cycles because marine sediments are critical for long-term carbon storage (1, 2).Prokaryotes in deep oceanic subsurface account for more than 25% of global cell numbers (), and it is still controversial whether Archaea or Bacteria are …