Soil organic carbon recovery in tropical tree plantations may depend on restoration of soil microbial composition and function

Bonner, Mark; Herbohn, John; Gregorio, Nestor; Pasa, Arturo; Avela, Mayet; Solano, Crisanto; Moreno, Maria Opelia Maranguit; Almendras-Ferraren, A. S.; Wills, Jarrah; Shoo, Luke P.; Schmidt, Susanne

doi:10.1016/j.geoderma.2019.06.017

Cited by 18 publications

(8 citation statements)

References 91 publications

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“…Climatic factors, especially hydrothermal conditions, are an important influence on the formation and development of palustrine wetlands and indirectly regulate SOC source-sink processes through affecting vegetation community assemblage and growth, as well as plant-residue decomposition quality and intensity [ 47 ]. The considerable SOC content in the C1, C2, and C6 geographical regions may be attributed to the control of temperature.…”

Section: Discussionmentioning

confidence: 99%

Estimation of Soil Organic Carbon Storage in Palustrine Wetlands, China

Han

Wan

Guo

et al. 2020

IJERPH

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Wetlands regulate the balance of global organic carbon. Small changes in the carbon stocks of wetland ecosystem play a crucial role in the regional soil carbon cycle. However, an accurate estimation of carbon stocks is still be debated for China’s wetlands ecosystem due to the limitation of data collection and methodology. Here, we investigate the soil organic carbon (SOC) storage in a 1-m depth in China’s palustrine wetlands. A total of 1383 sample data were collected from palustrine wetlands in China. The data sources are divided into three parts, respectively, data collection from published literature, data from books, and actual measurement data of sample points. The results demonstrate that there is considerable SOC storage in China’s palustrine wetlands (9.945 Pg C), primarily abundant in the northeast, northwest arid and semi-arid as well as Qinghai-Tibet Plateau regions. The SOC density in per unit area soil was higher in the wetland area of northeast, southwest and Qinghai-Tibet plateau. Within China terrestrial scale, the temperature and precipitation differences caused by latitude were the main environmental factors affecting the organic carbon content. Furthermore, except for the southeast and south wetland region, SOC content decreased with depth.

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Section: Discussionmentioning

confidence: 99%

Estimation of Soil Organic Carbon Storage in Palustrine Wetlands, China

Han

Wan

Guo

et al. 2020

IJERPH

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“…Forests cover only about 10 percent area in Leyte. The once dipterocarp rich rainforests of the island are now dominated by patches of old-growth forest, secondary forest, coconut plantations, Abaca (Musa textilis, a fiber yielding species from the Musaceae) and fast-growing timber plantations (Asio et al, 1998;Bonner et al, 2019).…”

Section: Methodsmentioning

confidence: 99%

Limited role of shifting cultivation in soil carbon and nutrients recovery in regenerating tropical secondary forests

Mukul

Herbohn

Ferraren

et al. 2022

Front. Environ. Sci.

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Shifting cultivation is a dominant land-use in the tropical forest-agriculture frontier in Southeast Asia and is blamed for much of the environmental degradation in the region. We examined the distribution and availability of four soil macronutrients—i.e., soil organic carbon (SOC), total nitrogen (N), phosphorus (P) and potassium (K), in secondary forests regenerating after shifting cultivation abandonment. Soil samples were collected along an upland fallow gradient on Leyte Island in the Philippines. The effect of site environmental attributes on the availability of SOC and nutrients was investigated using linear mixed-effect models. We found relatively higher concentrations of SOC and P in the oldest fallows and higher N concentration in the youngest fallow secondary forest. There was no significant difference in SOC and other macronutrients within sites of different fallow categories and soil depths, except in the case of soil K, which was highest in our control old-growth forest. Patch size together with slope of the site and fallow age were the most influential factors in explaining the variability in SOC and nutrients availability in secondary forests recovering after shifting cultivation abandonment. Our study suggests that shifting cultivation may not be detrimental to soil quality, at least on the soil parameters and soil type we studied in the Philippines upland.

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“…The change in total N and light fraction C was associated with other C fractions, thus, it showed moderate sensitivity to dryland degradation. The collapse of soil recalcitrant C in the final phase may cause fatal damage to soil functions (Bonner et al, 2019). With increasing sand but decreasing clay and silt contents, the soil adsorption of monolayer and hygroscopic water decreased (Li et al, 2021).…”

Section: Discussionmentioning

confidence: 99%

Soil fertility thresholds driven by sand content indicate drylands degradation phases on the Tibetan Plateau

Cai

Wang

et al. 2023

Land Degrad Dev

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Understanding the process of dryland degradation is crucial to combating desertification and maintaining land sustainability. To identify important indicators of dryland degradation, we conducted a field survey of 46 drylands spanning an aridity gradient across the Tibetan Plateau. Our random forest model suggested that soil sand content was the most important predictor of variation in soil fertility (carbon, nitrogen, and phosphorus). Most soil fertility showed a nonlinear and abrupt decline with increasing soil sand content, and displayed three sequential thresholds. First, soil organic carbon sharply decreased beyond a soil sand content threshold of 47%. Second, exceeding a subsequent threshold of 70%, the total nitrogen and light fraction carbon declined dramatically with increasing soil sand content. Finally, soil heavy fraction carbon, inorganic carbon, and total carbon were drastically reduced when the soil sand content exceeded 80%. The three soil fertility thresholds along the gradient of the soil sand content indicated a sequence of dryland degradation phases. Our findings provide an approach for detecting the severity of dryland degradation and suggest vulnerable areas of degradation on the Tibetan Plateau.

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Soil organic carbon recovery in tropical tree plantations may depend on restoration of soil microbial composition and function

Cited by 18 publications

References 91 publications

Estimation of Soil Organic Carbon Storage in Palustrine Wetlands, China

Estimation of Soil Organic Carbon Storage in Palustrine Wetlands, China

Limited role of shifting cultivation in soil carbon and nutrients recovery in regenerating tropical secondary forests

Soil fertility thresholds driven by sand content indicate drylands degradation phases on the Tibetan Plateau

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