Effect of biomass management regimes and wetting-drying cycles on soil carbon mineralization in a Sudano-Sahelian region

Yemadje, Pierrot Lionel; Guibert, Hervé; Chevallier, Tiphaine; Deleporte, Philippe; Bernoux, Martial

doi:10.1016/j.jaridenv.2015.10.017

Cited by 15 publications

(6 citation statements)

References 39 publications

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“…As early as 1958, Birch found that wet‐dry cycles typically lead to a pulse of C and nitrogen mineralization, which increase CO 2 emissions, a phenomenon known as the Birch effect (Birch, 1958). This conclusion is consistent with other similar studies (Shen et al, 2022; Yemadje et al, 2016). SOC mineralization gradually decreased throughout wet‐dry cycles, and the decrease was the largest during the first three cycles (Figure 4).…”

Section: Discussionsupporting

confidence: 94%

“…Most scholars recognize two main mechanisms: (1) fission in the physical structure of the soil (Zhu, Cao, et al, 2021) and (2) priming effects of soil microbial activity (Jiang et al, 2021). Wet‐dry cycles affect the water stability of soil aggregates, breaking large soil aggregates into smaller ones, removing physical protection from some SOC and releasing SOC from the aggregates (Dossa et al, 2009; Yemadje et al, 2016). This process increases the contact between soil organic matter and soil microorganisms, which ultimately leads to accelerated decomposition and mineralization of soil organic matter.…”

Section: Introductionmentioning

confidence: 99%

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Changes in the biological “regulators” of organic carbon mineralization in silted soils of check dams as a result of wet‐dry cycles

Liu,

Zhang,

et al. 2023

Land Degrad Dev

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Climate change is increasing the frequency of prolonged droughts and extreme rainfall events, with implications for ecosystem carbon (C) cycling and efforts to mitigate climate change. Exploring how wet and dry cycling events affect microbially mediated soil organic carbon (SOC) mineralization processes is critical for achieving global C neutrality targets. This study examines how drought, water stress, and wet‐dry cycles influence microorganisms and the SOC mineralization process. We found that wet‐dry cycles initially excited mineralization of SOC, but that soil mineralization gradually decreased as wet‐dry cycling continued. At the same time, the utilization of C sources by different microbial communities tended to change, from primarily carbohydrate, amines and acids to a single acid, esters, or alcohols. The limiting factors for SOC mineralization also varied when soils were exposed to drought, water stress, and wet‐dry cycles, and we quantified the direct and interactive contributions of each factor to SOC mineralization. The direct effects of the factors under drought and water stress were 0.70 and 0.74, while the interaction of the elements was only 0.29 and 0.24. The direct effects of the factors were only 0.30 under wet‐dry cycling conditions. Based on the results of this study, we propose a pathway for soil biological regulation of SOC mineralization during drought, water stress and wet‐dry cycles, in order to further clarify the microbial regulation mechanism related to SOC mineralization.

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Section: Discussionsupporting

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Changes in the biological “regulators” of organic carbon mineralization in silted soils of check dams as a result of wet‐dry cycles

Liu,

Zhang,

et al. 2023

Land Degrad Dev

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“…In general, drying always produced positive effects on CO 2 production and negative effects on CH 4 formation because of the aerobic conditions in wetlands (Olsson et al 2015;Liu et al 2017). Moreover, decomposition of SOC always fluctuate with soil drying-rewetting cycles, because that the microbes always respond quickly to the changes of soil moisture and salinity during drying-rewetting cycles (Moyano et al 2013;Yemadje et al 2016). For instance, Birch Effect always observed with a rewetting event after extreme drying as a result of rapid excitation of microbial activity (Birch 1958;Mavi and Marschner 2012).…”

Section: Introductionmentioning

confidence: 99%

Effects of Drying-Rewetting Frequency on Vertical and Lateral Loss of Soil Organic Carbon in a Tidal Salt Marsh

Feng

et al. 2020

Wetlands

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Tidal salt marshes, as "blue carbon" ecosystems, play a critical role in mitigation of global climate change since their large soil organic carbon (SOC) pool. Drying-rewetting cycles induced by periodic tides have profound influence on soil carbon cycling in tidal salt marshes. However, the magnitude and mechaanism of the effects of drying-rewetting frequency on SOC loss in tidal salt marshes is still uncertain. Here, we conducted a mesocosm experiment to identify how drying-rewetting frequency changes alter the vertical (CO 2 and CH 4 ) and lateral (dissolved organic carbon) carbon losses of soils in a tidal salt marsh in the Yellow River Delta (YRD). We found that increasing soil moisture inhibited CO 2 emission but stimulated CH 4 emission in a tidal salt marsh. Soil dissolved organic carbon (DOC) was produced in the drying phase and rewetting lead to the loss of DOC. Soil moisture and salinity change induced by drying-rewetting cycles were the critical factors controlling vertical organic carbon loss in a tidal salt marsh. DOC had significant effects on CO 2 emissions. Changes of tidal action and drying-rewetting cycle induced by global change can affect the pathway of carbon loss in a tidal salt marsh.Keywords Tidal salt marshes . Drying-rewetting cycle . CO 2 and CH 4 emissions . Dissolved organic carbon

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“…Soils in rangelands, combined with livestock productions, are reported to be responsible for a large share of GHG emissions, but these soils can also act as carbon sinks under certain conditions (Soussana et al, 2010;Valentini et al, 2014). Under arid to semi-arid rangelands, soil moisture is one of the main factors controlling emissions of CO 2 (Kuzyakov and Gavrichkova, 2010;Yemadje et al, 2016) and N 2 O from the soil to the atmosphere (Ussiri and Lal, 2013). It should be noted that although CH 4 emissions occur only in hydromorphic conditions, CH 4 emissions may also be significant, since there are extensive water bodies (e.g., ponds) and wetlands in certain parts of world's drylands (Serrano-Silva et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Livestock induces strong spatial heterogeneity of soil CO2, N2O and CH4 emissions within a semi-arid sylvo-pastoral landscape in West Africa

et al. 2017

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Greenhouse gas (GHG) emissions from the surface soils and surface water receiving animal excreta may be important components of the GHG balance of terrestrial ecosystems, but the associated processes are poorly documented in tropical environments, especially in tropical arid and semi-arid areas. A typical sylvo-pastoral landscape in the semi-arid zone of Senegal, West Africa, was investigated in this study. The study area (706 km² of managed pastoral land) was a circular zone with a radius of 15 km centered on a borehole used to water livestock. The landscape supports a stocking rate ranging from 0.11 to 0.39 tropical livestock units per hectare depending on the seasonal movements of the livestock. Six landscape units were investigated (land in the vicinity of the borehole, natural ponds, natural rangelands, forest plantations, settlements, and enclosed plots). Carbon dioxide (CO 2), nitrous oxide (N 2 O) and methane (CH 4) fluxes were measured with static chambers set up at 13 sites covering the six landscape units, and the 13 sites are assumed to be representative of the spatial heterogeneity of the emissions. A total of 216 fluxes were measured during the one-year study period (May 2014 to April 2015). At the landscape level, soils and surface water emitted an average 19.8 t C-CO 2 eq/(hm²•a) (CO 2 : 82%, N 2 O: 15%, and CH 4 : 3%), but detailed results revealed notable spatial heterogeneity of GHG emissions. CO 2 fluxes ranged from 1148.2 (±91.6) mg/(m²•d) in rangelands to 97,980.2 (±14,861.7) mg/(m²•d) in surface water in the vicinity of the borehole. N 2 O fluxes ranged from 0.6 (±0.1) mg/(m²•d) in forest plantations to 22.6 (±10.8) mg/(m²•d) in the vicinity of the borehole. CH 4 fluxes ranged from-3.2 (±0.3) mg/(m²•d) in forest plantations to 8788.5 (±2295.9) mg/(m²•d) from surface water in the vicinity of the borehole. This study identified GHG emission "hot spots" in the landscape. Emissions from the surface soils were significantly higher in the landscape units most frequently used by the animals, i.e., in the vicinity of the borehole and settlements; and emissions measured from surface water in the vicinity of the borehole and from natural ponds were on average about 10 times higher than soil emissions.

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Effect of biomass management regimes and wetting-drying cycles on soil carbon mineralization in a Sudano-Sahelian region

Cited by 15 publications

References 39 publications

Changes in the biological “regulators” of organic carbon mineralization in silted soils of check dams as a result of wet‐dry cycles

Changes in the biological “regulators” of organic carbon mineralization in silted soils of check dams as a result of wet‐dry cycles

Effects of Drying-Rewetting Frequency on Vertical and Lateral Loss of Soil Organic Carbon in a Tidal Salt Marsh

Livestock induces strong spatial heterogeneity of soil CO2, N2O and CH4 emissions within a semi-arid sylvo-pastoral landscape in West Africa

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