Factors controlling soil organic carbon sequestration under exotic tree plantations: A case study using the CO2Fix model in southwestern Ethiopia

Lemma, Bekele; Kleja, Dan Berggren; Olsson, Mats; Nilsson, Ingela

doi:10.1016/j.foreco.2007.06.029

Cited by 47 publications

(34 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Because ground vegetation recovers rapidly after thinning and clearcutting, its effect on SOC may result in smoothing of the simulated changes in the soil compartment (Palosuo et al 2008). Differences among tree species in SS were also observed by using the CO 2 Fix model to describe the same land-use change as studied here (Lemma et al 2007). …”

Section: Mitigation Effect Of Several Management Alternativesmentioning

confidence: 62%

“…This effect has also been noted by other authors who parameterized the Yasso model for Eucalyptus spp. (Lemma et al 2007) and for other species (de Wit et al 2006;Palosuo et al 2008). This is attributed to overestimation of decomposition of soil compartments, as well as to the fact that the model parameterization does not consider litter input sources other than trees.…”

Section: Discussionmentioning

confidence: 99%

“…In the CO 2 Fix model, the effects of climate on decomposition are related to the macroclimate, and some effects of microclimatic conditions on SOC decomposition may not have been taken into account. Lemma et al (2007) considered that the contribution that different species make to microclimate is small relative to litter input and litter quality, although Pérez-Cruzado et al (2012) suggested that these differences may be greater. Large differences among species in soil organic carbon evolution after landuse change were also observed in the same plots as those used here for validation, which can be only attributed to species-induced differences in microclimatic conditions (Pérez-Cruzado et al 2012).…”

Section: Discussionmentioning

confidence: 99%

“…Regarding C estimation, it is logistically impractical to sample the many sites, soil types, management regimes, landscapes, and climatic regimes with sufficient intensity to quantify the potential of SOC sequestration (Lemma et al 2007). Model development is therefore an essential tool for evaluating the mitigating effects of forest systems.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Carbon balance for different management practices for fast growing tree species planted on former pastureland in southern Europe: a case study using the CO2Fix model

et al. 2012

View full text Add to dashboard Cite

Although it is known that forestry mitigates carbon emissions to some degree, there is still a need to investigate the extent to which changes in forest management regimes affect the carbon cycle. In a climate-change scenario, forest management schemes must be optimized to maximize product supply and minimize environmental impacts. It is difficult to predict the mitigating effects of different silvicultural regimes because of differences in the growth characteristics of each species, destination of products, and industrial efficiencies. The objective of the present study was to use a modeling approach to evaluate the effects of different management regimes for fast growing species in southern temperate Europe in relation to mitigating climate change. A comprehensive study was carried out considering the C sink effect in biomass, soil and wood products, the substitutive effect of bioenergy, and particular conditions of the forest industry in southern Europe. The mechanistic CO 2 Fix model was parameterized for three species used in fast growing plantations in southern Europe: Eucalyptus globulus, Eucalyptus nitens, and Pinus radiata. Data from 120 plots covering the complete age range observed for each species were used to calculate changes in C stocks in aboveground biomass and organic and mineral soil and to validate the parameterized model for these conditions. Additional information about the efficiency of forest industry processes in the region was also considered. A strong bias in soil organic carbon estimation was observed and attributed to overestimations in the decomposition rates of soil compartments. Slight bias was also observed in the carbon biomass estimation when forest-specific yield models were used to simulate afforestation over former pastureland. As regards the model sensitivity, the Yasso model was strongly robust to turnover of leaves, roots, and branches. The chip wood production alternative yielded higher carbon stock in biomass and products, as well as in bioenergy substitution effect, than the sawn wood production alternative. Nevertheless, the sawn wood alternative was the most effective as regards the C stock in the soil. Site index had an important effect for all species, alternatives, and compartments, and mitigating effects increased with site index. Harvesting of clearcutting and thinning slash for bioenergy use led to a slight decrease in the soil carbon equilibrium but significantly increased the mitigation effect through bioenergy use.

show abstract

Section: Mitigation Effect Of Several Management Alternativesmentioning

confidence: 62%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Carbon balance for different management practices for fast growing tree species planted on former pastureland in southern Europe: a case study using the CO2Fix model

et al. 2012

View full text Add to dashboard Cite

show abstract

“…Although this one-time study may not exactly represent C sequestration, the C stock values can be taken as good indicators of C sequestration potential of the systems. The ecological process by which trees contribute to such higher amounts of C in stable form is believed to be mediated via litterfall and decomposition, and root activity especially decomposition of sloughed-off roots (Schlesinger et al 1990;Lemma et al 2007). The relative proportions of finer soil fractions (siltand-clay) in the soil were also higher under tree-based systems compared to treeless system.…”

Section: Soil Organic Carbon In Fraction-size Classesmentioning

confidence: 99%

Carbon storage in relation to soil size-fractions under tropical tree-based land-use systems

Saha

Nair

et al. 2009

Plant Soil

View full text Add to dashboard Cite

The extent of carbon (C) sequestration in soils under agroforestry systems in relation to soil types (fraction sizes) and vegetation structure remains largely unexplored. This study examined soil C storage, an indicator of C sequestration potential, in homegardens (HGs), natural forest, and single-species stands of coconut (Cocos nucifera), rice (Oryza sativa)-paddy, and rubber (Hevea brasiliensis), in Thrissur district, Kerala, India. Soil samples collected from four depth zones up to 1 m were fractionated to three size classes (250 -2000 µm, 53 -250 µm, <53 µm) and their total C content determined. Total C stock (Mg ha −1 ) was highest in forests (176.6), followed by managed treebased systems, and lowest in rice-paddy field (55.6). The results show storage of higher amounts of C in the <53 µm fraction, the most stable form of C in soil, up to one-meter depth, in land-use systems with high stand density of trees such as forests and small-sized HG. Although the results do not allow comparison of changes in soil C stock in different land-use systems, they show higher C storage in soils under tree-based land-use systems compared with the treeless (ricepaddy) system, especially in lower soil depths, suggesting the higher soil C sequestration potential of tree-based systems, and thereby their role in reducing atmospheric concentration of carbon dioxide.

show abstract

Estimating carbon fixation of plant organs for afforestation monitoring using a process‐based ecosystem model and ecophysiological parameter optimization

Miyauchi

Machimura

Saito

2019

Ecology and Evolution

View full text Add to dashboard Cite

Afforestation projects for mitigating CO 2 emissions require to monitor the carbon fixation and plant growth as key indicators. We proposed a monitoring method for predicting carbon fixation in afforestation projects, combining a process‐based ecosystem model and field data and addressed the uncertainty of predicted carbon fixation and ecophysiological characteristics with plant growth. Carbon pools were simulated using the Biome‐BGC model tuned by parameter optimization using measured carbon density of biomass pools on an 11‐year‐old Eucommia ulmoides plantation on Loess Plateau, China. The allocation parameters fine root carbon to leaf carbon (FRC:LC) and stem carbon to leaf carbon (SC:LC), along with specific leaf area (SLA) and maximum stomatal conductance ( g smax ) strongly affected aboveground woody (AC) and leaf carbon (LC) density in sensitivity analysis and were selected as adjusting parameters. We assessed the uncertainty of carbon fixation and plant growth predictions by modeling three growth phases with corresponding parameters: (i) before afforestation using default parameters, (ii) early monitoring using parameters optimized with data from years 1 to 5, and (iii) updated monitoring at year 11 using parameters optimized with 11‐year data. The predicted carbon fixation and optimized parameters differed in the three phases. Overall, 30‐year average carbon fixation rate in plantation (AC, LC, belowground woody parts and soil pools) was ranged 0.14–0.35 kg‐C m −2 y −1 in simulations using parameters of phases (i)–(iii). Updating parameters by periodic field surveys reduced the uncertainty and revealed changes in ecophysiological characteristics with plant growth. This monitoring method should support management of afforestation projects by carbon fixation estimation adapting to observation gap, noncommon species and variable growing conditions such as climate change, land use change.

show abstract

Factors controlling soil organic carbon sequestration under exotic tree plantations: A case study using the CO2Fix model in southwestern Ethiopia

Cited by 47 publications

References 33 publications

Carbon balance for different management practices for fast growing tree species planted on former pastureland in southern Europe: a case study using the CO2Fix model

Carbon balance for different management practices for fast growing tree species planted on former pastureland in southern Europe: a case study using the CO2Fix model

Carbon storage in relation to soil size-fractions under tropical tree-based land-use systems

Estimating carbon fixation of plant organs for afforestation monitoring using a process‐based ecosystem model and ecophysiological parameter optimization

Contact Info

Product

Resources

About