Soil Carbon Stocks and Compartments of Organic Matter Under Conventional Systems in Brazilian Semi-Arid Region

Medeiros, Aldair de Souza; SOARES, ANTÔNIO ADOLFO SILVA; Maia, Stoécio Malta Ferreira

doi:10.1590/1983-21252022v35n321rc

Cited by 4 publications

(1 citation statement)

References 23 publications

(29 reference statements)

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“…We observed greater carbon stabilized in the mineral fraction in both the grove and the savanna than the particulate fraction (Figure 5) confirming earlier studies (e.g., Georgiou et al., 2022; Medeiros et al., 2022). This observation suggests that the greater portion of soil carbon sequestered in the anthropogenic grove is persistent.…”

Section: Discussionsupporting

confidence: 91%

Soil carbon, nutrient, and vegetation dynamics of an old Anogeissus grove in Mole National Park, Ghana

Logah,

Abubakari,

Issifu

et al. 2024

Biotropica

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Formation of forest islands in West Africa has been linked to anthropogenic soil improvement resulting in luxuriant tree growth in otherwise open savanna landscapes. However, there is limited understanding of how such unique ecosystems modulate soil carbon (C) dynamics and nutrient cycling. In this study, we report soil nutrient characteristics and two distinct soil organic carbon pools of Anogeissus grove (forest island) associated with abandoned village sites of the Mole National Park in the Guinea savanna or tropical continental climatic zone of Ghana, taking opportunity of a previously published study in Biotropica in 1978. We compared present‐day differences in soil characteristics between the previously studied forest grove and adjoining open savanna in the Park and evaluated vegetation dynamics since first measurement in 1974. Overall, we see changes related to self‐thinning and expansion of the grove on a decadal timescale. Soil organic matter and available phosphorus contents were greater in the grove and increased by 19.6% and 18.7%, respectively over time, showing persistence after four decades. Mineral‐associated organic carbon (MAOC) differed significantly (p < .05) between the vegetation types, being 3.44% in the grove and 2.34% in the savanna. The grove was ca. 25% greater in particulate organic carbon (POC) content than the savanna. In both vegetation types, >55% of carbon was stabilized in the mineral fraction. Our study demonstrates long‐term human impacts on soil and vegetation and offers a clear nature‐based solution for climate change mitigation through sustainable land management by indigenous people toward achievement of the “4p1000” initiative.

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Section: Discussionsupporting

confidence: 91%

Soil carbon, nutrient, and vegetation dynamics of an old Anogeissus grove in Mole National Park, Ghana

Logah,

Abubakari,

Issifu

et al. 2024

Biotropica

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Effects of Coffee arabica cultivation systems on tropical soil microbial biomass and activity in the northeast region of Brazil

de Carvalho,

Barreto-Garcia,

Pérez-Maluf

et al. 2024

Agroforest Syst

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Soil organic matter fractions under different land uses and soil classes in the Brazilian semi-arid region

dos Santos,

Medeiros,

Araújo

et al. 2023

Soil Res.

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Context Land use change (LUC) is considered one of the main factors associated with soil carbon (C) loss worldwide. Aim Evaluate changes in labile and non-labile soil organic matter (SOM) fractions in different land use systems – native vegetation (NV), agriculture with conventional cultivation (CC) and pasture (PA) – in five soil classes in the Brazilian semi-arid region. Methods Soil samples were collected to a depth of 100 cm, and soil C and nitrogen (N) content and stocks were determined and also stocks of labile (LC) and non-labile (NlC) C fractions. In addition, the Carbon Management Index (CMI) was used to evaluate soil health changes. Key results SOC stocks significantly decreased after conversion from NV to CC (by 23%; 0–30 cm) and PA (by 22%; 0–100 cm). Losses due to LUC were greater in the LC than the NlC fraction, and this was reflected in the CMI reducing by 37% for PA and 57% for CC in the 0–100 cm layer. Regarding the different soil classes, LUC reduced SOC stocks only in the Luvisol, Planosol and Leptosol classes, while in the LC fraction, changes were observed in Acrisols, Cambisols and Planosols. Conclusions Clearing NV areas for CC systems and PA reduced the SOC stocks and SOM fractions and, consequently, decreased soil quality. Implications These findings underscore the importance of considering the quality of SOM when evaluating LUC impacts on SOC stocks in the different classes of soil in the Brazilian semi-arid region.

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Soil Carbon Stocks and Compartments of Organic Matter Under Conventional Systems in Brazilian Semi-Arid Region

Cited by 4 publications

References 23 publications

Soil carbon, nutrient, and vegetation dynamics of an old Anogeissus grove in Mole National Park, Ghana

Soil carbon, nutrient, and vegetation dynamics of an old Anogeissus grove in Mole National Park, Ghana

Effects of Coffee arabica cultivation systems on tropical soil microbial biomass and activity in the northeast region of Brazil

Soil organic matter fractions under different land uses and soil classes in the Brazilian semi-arid region

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