Cellulose dominantly affects soil fauna in the decomposition of forest litter: A meta-analysis

Xu, Xuan; Sun, Yuan; Sun, Jiejie; Cao, Penghe; Wang, Yuchao; Chen, Han Y. H.; Wang, Weifeng; Ruan, Honghua

doi:10.1016/j.geoderma.2020.114620

Cited by 31 publications

(37 citation statements)

References 79 publications

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“…These results reveal that the changes in aggregates may be determined by further organic and inorganic adhesives [50][51][52]. Additionally, the accumulation of humic substances in the topsoil might be due to the decomposition of litter, as the organic matter from the decomposition of litter initially resides in the topsoil and is subsequently transported to the subsoil [10,53].…”

Section: Distribution Of Humic Substances In Bulk Soilmentioning

confidence: 88%

Long-Term Forest Conversion Affects Soil Stability and Humic Substances in Aggregate Fractions in Subtropical China

Meng

Zhao³

et al. 2022

Forests

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Soil aggregates are the basic structural components of soil, which are important factors that can predict erosion resistance. However, few researchers have investigated the effects of forest conversion on the stability of soil aggregates, particularly in subtropical forests. In this study, soils from various depths (0 to 30 cm) were collected from four forest types (transformed from broadleaved forests (BMF) to combined coniferous broadleaved (CBMF), Chinese fir (FF), and bamboo forests (BF)) to determine the impacts of forest conversion on the physical and chemical properties of soil, water-stable soil aggregates, and aggregate-associated humic substances. The results showed that forest conversion had no effects on the soil’s physical properties, or the humic substances in bulk soil, but had significant effects on soil aggregates. In addition, the conversion of broadleaved forest to Chinese fir forest increased the soil stability, and to bamboo forest, decreased the soil stability. Finally, the soil’s physicochemical properties were closely related to aggregate-associated humic substances. In summary, specific forest management measures should be applied to strengthen the positive impacts and reduce the negative impacts associated with forest conversion.

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Section: Distribution Of Humic Substances In Bulk Soilmentioning

confidence: 88%

Long-Term Forest Conversion Affects Soil Stability and Humic Substances in Aggregate Fractions in Subtropical China

Meng

Zhao³

et al. 2022

Forests

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“…where n c and n f are the sample sizes of invertebrate inclusion and exclusion treatments, respectively, and S c andS f are the standard deviations of invertebrate inclusion and exclusion treatments. We calculated the effect size and v i using the 'escalc' function in the R package 'metafor' (Xu et al 2020). We estimated missingS c and S f values using random number simulation (10000 repetitions) and estimated the missing v i using the 'impute_SD' function in the 'metagear' package (Bracken & Sinclair 1992).…”

Section: Discussionmentioning

confidence: 99%

“…They are usually more active in warm or humid biomes such as tropical forests, limited by cold and dry conditions (García-Palacios et al 2013). As most published observations are from non-tropical regions (Xu et al 2020;McCary & Schmitz 2021), current models and their conceptual framework may not assess invertebrate effects on decomposition accurately. Accordingly, an understanding of the regional differences in invertebrate-mediated decomposition and how specific decomposer invertebrates, climate, and soil mediate regional differences are important for us to estimate invertebrate effects on biogeochemistry.…”

Section: Introductionmentioning

confidence: 99%

Soil invertebrates are the key drivers of litter decomposition in tropical forests

Zeng

Gao

Wang

et al. 2023

Preprint

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Forest litter decomposition is an essential component of global carbon and nutrient turnover. Soil invertebrates play important roles in litter decomposition, but the regional pattern of their effects is poorly understood. We examined 476 case studies across 93 sites and performed a meta-analysis to estimate regional effects of invertebrates on forest litter decomposition. We then assessed how invertebrate diversity, climate and soil pH drive regional variations in invertebrate-mediated decomposition. We found that (1) invertebrate contributions to litter decomposition are 1.5 times higher in tropical forests than forests outside the tropics, with an overall contribution of 31% to global forest litter decomposition; and (2) invertebrate diversity, particularly of termites, together with warm, humid and acidic environments in the tropics are positively associated with forest litter decomposition by soil invertebrates. Our results demonstrate the significant difference in invertebrate effects on mediating forest litter decomposition between the tropics and elsewhere. We demonstrate, also, the significance of termites in driving litter mass loss in the tropics. These results are particularly pertinent in the tropics where climate change and human disturbance threaten soil invertebrate biodiversity and the ecosystem services it provides.

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“…Root chemistry, including broad traits such as C:N ratios and specific traits such as carbohydrates (i.e., cellulose and hemicellulose) profile and lignin structures and content, affect decomposition rates and therefore, potentially contribute to SOM stocks. For example, C:N and lignin are negatively correlated with root decomposition rates, whereas holocellulose content is positively correlated with root decomposition for perennial bioenergy grasses (Austin et al., 2009; von Haden et al., 2019; Xu et al., 2020). The compositions of roots and its chemical features also vary depending on the root resources.…”

Section: Root Structural Chemistry Metabolites and Exudatesmentioning

confidence: 99%

Bioenergy Underground: Challenges and opportunities for phenotyping roots and the microbiome for sustainable bioenergy crop production

York

Cumming

Trusiak

et al. 2022

The Plant Phenome Journal

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Bioenergy production often focuses on the aboveground feedstock production for conversion to fuel and other materials. However, the belowground component is crucial for soil carbon sequestration, greenhouse gas fluxes, and ecosystem function. Roots maximize feedstock production on marginal lands by acquiring soil resources and mediating soil ecosystem processes through interactions with the microbial community. This belowground world is challenging to observe and quantify; however, there are unprecedented opportunities using current methodologies to bring roots, microbes, and soil into focus. These opportunities allow not only breeding for increased feedstock production but breeding for increased soil health and carbon sequestration as well. A recent workshop hosted by the USDOE Bioenergy Research Centers highlighted these challenges and opportunities while creating a roadmap for increased collaboration and data interoperability through standardization of methodologies and data using F.A.I.R. principles. This article provides a background on the need for belowground research in bioenergy cropping systems, a primer on root system properties of major U.S. bioenergy crops, and an overview of the roles of root chemistry, exudation, and microbial interactions on sustainability. Crucially, we outline how to adopt standardized measures and databases to meet the most pressing methodological needs to accelerate root, soil, and microbial research to meet the pressing societal challenges of the century.

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Cellulose dominantly affects soil fauna in the decomposition of forest litter: A meta-analysis

Cited by 31 publications

References 79 publications

Long-Term Forest Conversion Affects Soil Stability and Humic Substances in Aggregate Fractions in Subtropical China

Long-Term Forest Conversion Affects Soil Stability and Humic Substances in Aggregate Fractions in Subtropical China

Soil invertebrates are the key drivers of litter decomposition in tropical forests

Bioenergy Underground: Challenges and opportunities for phenotyping roots and the microbiome for sustainable bioenergy crop production

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