An assessment of the potential for carbon finance in rangelands ICRAF Working Paper no. 68

Tennigkeit, T.; Wilkes, A.

doi:10.5716/wp15892.pdf

Cited by 14 publications

(10 citation statements)

References 30 publications

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“…The extent to which shrub roots are impacted by bush management is unknown; but if bush stumps are killed, large amounts of carbon could enter the soil pool and accumulate to significant amounts (Archer and Predick, 2014). The net soil carbon sequestration in dryland primarily depends on the rate of input of organic matter, the rate of decomposition of organic matter and the rate of carbon loss through soil respiration (Tennigkeit and Wilkes, 2008).…”

Section: Herbaceous Plant Biomass and Carbon Stockmentioning

confidence: 99%

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Effects of bush encroachment on plant composition, diversity and carbon stock in Borana rangelands, Southern Ethiopia

Gobelle¹,

Gure²

2018

Int. J. Biodivers. Conserv.

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Bush encroachment is reducing rangeland productivity in Borana rangelands. This study was conducted in Teltele Woreda of Borana zone, to evaluate the effects of bush encroachment on plant species composition, diversity and its contribution to carbon stock. Bush encroached, non-encroached and bush thinned rangeland types were selected for the study. Nested plots for collecting tree, shrub, herbaceous and soil data were placed systematically along the geographic gradient within each of the rangeland types. Herbaceous plants were clipped to the ground, collected, oven dried, and their carbon stock was estimated. The tree/shrub biomass was estimated using allometric models, and converted to per hectare. A total of 53 vascular plant species belonging to 19 families were identified. Poaceae and Fabaceae families dominated the site. Bush encroachment had reduced diversity and species richness of herbaceous plants, but did not affect other tree/shrub plant diversity and richness. Although bush thinning improved herbaceous diversity and richness, it reduced tree/shrub richness. The tree/shrub aboveground carbon stock in bush encroached areas is greater than non-encroached rangeland types. Soil carbon stock is highest in bush thinned locales. Total organic carbon stock is ranked from largest to least as follows: Bush encroached, >Bush thinned, and >non-encroached. Generally, bush encroachment increased the rangeland carbon stock, but reduced herbaceous plant biomass and density.

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Section: Herbaceous Plant Biomass and Carbon Stockmentioning

confidence: 99%

“…The grassland carbon cycle models generally focus on three carbon 'pools': Carbon stored in living vegetation, litter, and soil carbon. The increase in tree density in grass-dominated areas can increase carbon storage capacity of grassland systems and rates of carbon sequestration (Hughes et al, 2006;Tennigkeit and Wilkes, 2008).…”

Section: Introductionmentioning

confidence: 99%

Effects of bush encroachment on plant composition, diversity and carbon stock in Borana rangelands, Southern Ethiopia

Gobelle¹,

Gure²

2018

Int. J. Biodivers. Conserv.

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“…d A tonne of carbon is equivalent to 3.67 tonnes of carbon dioxide (see Niles et al 2010;Tennigkeit and Wilkes 2008 …”

Section: Endnotes Amentioning

confidence: 99%

Carbon stocks in semi-arid pastoral ecosystems of northern Kenya

Dabasso

Taddese

Hoag

2014

Pastoralism: Research, Policy and Practice

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Data on carbon stocks in pastoral ecosystems is important for assessing their contribution for offsetting emissions of greenhouse gases through carbon storage. Such data also provides baseline information to determine if pastoral grazing management can be engaged for carbon credit trading. Real and accurate carbon data is scarce. Much of the available data is often based on limited assessment of carbon stocks in a specified range unit, which fails to capture the spatial and temporal heterogeneity that characterizes pastoral ecosystems. In this study, we considered heterogeneity of semi-arid pastoral ecosystems of northern Kenya by aggregating sample results taken during wet and dry seasons and from various landscape types. We found average carbon stocks of 93.01 ± 15.72 tonnes ha−1 across landscape types and seasons. The measured amount of stored carbon is sufficient to have an important contribution in controlling the atmospheric concentration of greenhouse gases; it also indicates a potential to improve pastoralist livelihoods through carbon credit trading. However, more research would be required in order to qualify pastoralists for carbon credits since the data collected in this study is not sufficient to determine the change in carbon storage by grazing practices. In addition, uncertainty in the value of carbon credits needs to be considered to avoid relying on a risky prospect.

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“…Any management aimed at increasing in carbon sequestration should be of paramount importance in the face of climate change [40]. Such suitable management practices can increase the considerable amount of carbon stocks or decreases in carbon losses [41].…”

Section: Effects Of Land Use On Soil Organic Carbonmentioning

confidence: 99%

Changes in Soil Organic Carbon Stock Under Different Land Use Types in Semiarid Borana Rangelands: Implications for CO2 Emission Mitigation in the Rangelands

Shiferaw¹,

Yimer²,

Tuffa³

2019

J Agri Sci Food Res

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Understanding the impact of land use change on soil organic carbon stock following the conversion of a semiarid rangeland into different land use types is essential to devise an appropriate and sustainable rangeland management strategy. However, there is a knowledge gap as to the impact of currently ongoing land use changes on soil organic carbon stock, which is an important rangeland ecosystem service, particularly in the face of climate change. Thus, this study was conducted to assess the effect of land use change on soil organic carbon stock in three land use types, namely, enclosures, communal grazing and cultivated lands in Borana rangeland. The result indicated that there were significant interactions between land use types and depths for soil organic carbon stock (p<0.0001) and bulk density (p=0.0055) with mean losses of 60% and 69% in soil organic carbon stock from the surface layer (0-10 cm) of communal and cultivated lands, respectively, as compared to enclosure land use type. The results indicated that communal grazing and crop cultivation in the Borana rangeland resulted in significantly decreased soil organic carbon stock. Hence, the current trend must be curbed to put back the system on its right track of resilience and sustainability for its long-term benefit and to mitigate the unprecedented increase in CO 2. Therefore, the results of this study would be useful for the improvement of land use management in the future.

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An assessment of the potential for carbon finance in rangelands ICRAF Working Paper no. 68

Cited by 14 publications

References 30 publications

Effects of bush encroachment on plant composition, diversity and carbon stock in Borana rangelands, Southern Ethiopia

Effects of bush encroachment on plant composition, diversity and carbon stock in Borana rangelands, Southern Ethiopia

Carbon stocks in semi-arid pastoral ecosystems of northern Kenya

Changes in Soil Organic Carbon Stock Under Different Land Use Types in Semiarid Borana Rangelands: Implications for CO2 Emission Mitigation in the Rangelands

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