Substantial Stem Methane Emissions From Rainforest and Cacao Agroforest Partly Negate Soil Uptake in the Congo Basin

Iddris, Najeeb Al-Amin; Corre, Marife D.; Straaten, Oliver van; Lontsi, Rodine Tchiofo; Veldkamp, Edzo

doi:10.1029/2021jg006312

Cited by 7 publications

(4 citation statements)

References 72 publications

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“…The overall low CH 4 uptake in our forested volcanic soil was probably also influenced by its low soil mineral N levels (Table 2). Limitation by N availability on soil CH 4 consumption had been reported for forests in Indonesia (Hassler et al 2015), Panama (Matson et al 2017;Veldkamp et al 2013), Ecuador (Wolf et al 2012, and Cameroon (Iddris et al 2021) with Andosol, Cambisol and highly weathered Acrisol and Ferralsol soils.…”

Section: Soil Greenhouse Gas Fluxes From the Forestmentioning

confidence: 84%

“…Additionally, during the wet season gas diffusion from the atmosphere to the soil could decrease as soil moisture content increased (Fig. 1e), which may limit CH 4 availability to microsites where concurrent methanotrophic activity occur (Iddris et al 2021;Matson et al 2017;Tchiofo Lontsi et al 2020;Veldkamp et al 2013). Additionally, the increasing CH 4 uptake with increasing NO 3 levels (Fig.…”

Section: Soil Greenhouse Gas Fluxes From the Forestmentioning

confidence: 99%

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Soil greenhouse gas fluxes from tropical vegetable farms, using forest as a reference

Quiñones

Veldkamp

Lina

et al. 2022

Nutr Cycl Agroecosyst

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Field-based quantification of soil greenhouse gas emissions from the Philippines’ agriculture sector is missing for vegetable production systems, despite its substantial contribution to agricultural production. We quantified soil N2O emission, CH4 uptake, and CO2 efflux in vegetable farms and compared these to the secondary forest. Measurements were conducted for 13 months in 10 smallholder farms and nine forest plots on Andosol soil in Leyte, Philippines using static chambers. Soil N2O and CO2 emissions were higher, whereas CH4 uptake was lower in the vegetable farms than in the forest. Vegetable farms had annual fluxes of 12.7 ± 2.6 kg N2O-N ha−1 yr−1, −1.1 ± 0.2 kg CH4-C ha−1 yr−1, and 11.7 ± 0.7 Mg CO2-C ha−1 yr−1, whereas the forest had 0.10 ± 0.02 kg N2O-N ha ha−1 yr−1, −2.0 ± 0.2 kg CH4-C ha−1 yr−1, and 8.2 ± 0.7 Mg CO2-C ha−1 yr−1. Long-term high N fertilization rates in vegetable farms resulted in large soil mineral N levels, dominated by NO3– in the topsoil and down to 1-m depth, leading to high soil N2O emissions. Increased soil bulk density in the vegetable farms probably increased anaerobic microsites during the wet season and reduced CH4 diffusion from the atmosphere into the soil, resulting in decreased soil CH4 uptake. High soil CO2 emissions from the vegetable farms suggested decomposition of labile organic matter, possibly facilitated by plowing and large N fertilization rates. The global warming potential of these vegetable farms was 31 ± 2.7 Mg CO2-eq ha−1 yr−1 (100-year time frame).

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Section: Soil Greenhouse Gas Fluxes From the Forestmentioning

confidence: 84%

Section: Soil Greenhouse Gas Fluxes From the Forestmentioning

confidence: 99%

Soil greenhouse gas fluxes from tropical vegetable farms, using forest as a reference

Quiñones

Veldkamp

Lina

et al. 2022

Nutr Cycl Agroecosyst

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“…Prior research has highlighted the importance of soil texture in governing greenhouse gas emissions through its influence on the quantity of micro- and macropores within the soil, which is essential for aeration and subsequently affects gas diffusion 28 . Increased clay content could hinder the diffusion of atmospheric CH 4 into the soil, restricting aerobic CH 4 oxidation and enhancing anaerobic microsite CH 4 production in clayey soils, particularly during the rainy season 46 , 47 . Additionally, Martins et al highlighted that soil moisture and sand content exerted the most pronounced direct influence on CH 4 fluxes, while rainfall indirectly affected fluxes by directly impacting soil moisture and gas diffusivity 48 .…”

Section: Discussionmentioning

confidence: 99%

Soil methane emissions from plain poplar (Populus spp.) plantations with contrasting soil textures

Ma,

Feng,

Guo

et al. 2024

Sci Rep

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The forest soil methane (CH4) flux exhibits high spatiotemporal variability. Understanding these variations and their driving factors is crucial for accurately assessing the forest CH4 budget. In this study, we monitored the diurnal and seasonal variations in soil CH4 fluxes in two poplar (Populus spp.) plantations (Sihong and Dongtai) with different soil textures using the static chamber-based method. The results showed that the annual average soil CH4 flux in the Sihong and Dongtai poplar plantations was 4.27 ± 1.37 kg CH4-C ha–1 yr–1 and 1.92 ± 1.07 kg CH4-C ha–1 yr–1, respectively. Both plantations exhibited net CH4 emissions during the growing season, with only weak CH4 absorption (–0.01 to –0.007 mg m–2 h–1) during the non-growing season. Notably, there was a significant difference in soil CH4 flux between the clay loam of the Sihong poplar plantation and the sandy loam of the Dongtai poplar plantation. From August to December 2019 and from July to August and November 2020, the soil CH4 flux in the Sihong poplar plantation was significantly higher than in the Dongtai poplar plantation. Moreover, the soil CH4 flux significantly increased with rising soil temperature and soil water content. Diurnally, the soil CH4 flux followed a unimodal variation pattern at different growing stages of poplars, with peaks occurring at noon and in the afternoon. However, the soil CH4 flux did not exhibit a consistent seasonal pattern across different years, likely due to substantial variations in precipitation and soil water content. Overall, our study emphasizes the need for a comprehensive understanding of the spatiotemporal variations in forest soil CH4 flux with different soil textures. This understanding is vital for developing reasonable forest management strategies and reducing uncertainties in the global CH4 budget.

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“…There have been several studies showing the influence of soil physical and chemical attributes on GHGs fluxes, for example in China (Liu et al, 2017; Wu et al, 2022; Zhao et al, 2019; Zhuang & Tian, 2021), in Africa (Iddris et al, 2021; MacCarthy et al, 2018; Tchiofo Lontsi et al, 2020; Wanyama et al, 2019), in Europe (Bras et al, 2022; Christiansen & Gundersen, 2011; Forster et al, 2021; Schaufler et al, 2010), in the USA (Melillo et al, 2017; Mushinski et al, 2019; Ni & Groffman, 2018; Porter & Dillingham, 2021) and in Brazil (Costa et al, 2018; de Oliveira et al, 2021; Godoi et al, 2016; Monteiro et al, 2020; Van Haren et al, 2013; Veloso et al, 2019); however, most of these studies have focussed on a specific gas, and not the three main GHGs simultaneously (e.g. Castaldi et al, 2020; Gatica et al, 2020; Liu et al, 2017; MacCarthy et al, 2018; Zhao et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Physical, chemical and microbiological soil attributes influence soil greenhouse gases fluxes in Atlantic Forest and pine (Pinus taeda) plantations in Brazil

Tulio

Rachwal

Zanatta

et al. 2022

Soil Use and Management

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Forest soils can be sources or sinks of greenhouse gases (GHGs) depending on soil attributes that affect biomass and activity of soil micro-organisms involved in GHGs fluxes. In this work, we tested the hypothesis that soil physical, chemical and microbiological attributes, under different forests ecosystems, affect the soil GHGs [nitrous oxide (N 2 O), carbon dioxide (CO 2 ) and methane (CH 4 )] fluxes.The study was carried out in two locations in southern Brazil in 2019, with three experimental plots of 900 m 2 in native forests of the Atlantic Forest biome and in loblolly pine (Pinus taeda) plantations. Air samples released from the soil surface were analysed for concentration and flux of CO 2 , N 2 O and CH 4 . Soil samples were analysed for chemical attributes, density (Ds), soil microporosity (MiPs), soil macroporosity (MaPs), total porosity (TP), water-filled pore space (WFPS), microbial biomass carbon (MB-C), basal respiration (BR), microbial (qMic) and metabolic (qCO 2 ) quotient and activities of soil urease and βglucosidase enzymes. The seasons influenced the CO 2 and N 2 O emissions, probably because of the changes in seasonal conditions. However, native forests consumed more CH 4 than pine plantations. Meanwhile, the native forests presented soils with lower Ds (average 21.5% lower), more TP (average 12.5% higher) and more moisture (average 33% higher), which improved the microbiological attributes of the soil (20% to 60% more MB-C, 67% higher urease activity and 30% higher βglucosidase activity) compared with pine plantations. Native forests contributed more intensely to CH 4 consumption than pine plantations because they present better physical, chemical and microbiological soil conditions. Therefore, it is possible that forestry practices that improve soil physical attributes are likely to contribute to increase CH 4 consumption, and to reduce GHGs emissions in forest ecosystems.

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Substantial Stem Methane Emissions From Rainforest and Cacao Agroforest Partly Negate Soil Uptake in the Congo Basin

Cited by 7 publications

References 72 publications

Soil greenhouse gas fluxes from tropical vegetable farms, using forest as a reference

Soil greenhouse gas fluxes from tropical vegetable farms, using forest as a reference

Soil methane emissions from plain poplar (Populus spp.) plantations with contrasting soil textures

Physical, chemical and microbiological soil attributes influence soil greenhouse gases fluxes in Atlantic Forest and pine (Pinus taeda) plantations in Brazil

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