Abstract
In order to foster the potential of exclosures to sequester carbon, it is understood that they are increasingly assisted through enrichment planting. To study the impact of the enrichment planting on carbon sequestration process, five exclosures with enrichment planting and five pure naturally regenerated exclosures were selected. Along parallel transects, 20 × 20 m plots were laid at 100 m intervals where all woody vegetations were counted and measured for their diameter and total height. For soil sampling, five subplots at the center and four at each corner of the plots were established. The samples were collected at a depth of 0–0.2 m, and this procedure was repeated for each plot. In this case, when good management practices were implemented (such as Wukro exclosures), significant differences in organic soil carbon above the ground and the total carbon between naturally regenerated and enriched exclosures (P < 0.05) were found. The mean estimates of the above ground carbon, soil carbon, and total carbon were respectively 8.08, 31.04, and 39.12 ton/ha for natural regeneration vs. 7.94, 31.00, and 38.93 ton/ha for enriched regeneration. Lower altitudes had significantly higher soil organic carbon (P < 0.05) than the higher altitudes. However, the slope had an insignificant effect on carbon distribution. Enriched exclosures performed more poorly in carbon sequestration. This was possibly due to the disturbances caused by mass plantation and poor post plantation follow up, since improved performance (P < 0.05) was seen in one enriched exclosure with better management practices.
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References
Aerts R, Overtveld KV, Mitiku H, Hermy M, Deckers J, Muys B (2006) Species composition and diversity of small Afromontane forest fragments in northern Ethiopia. Plant Ecol 187:127–142
Alcántara LP, García LB, Espejo GA (2014) Topography effect on soil organic carbon pool in Mediterranean natural areas (Southern Spain). Geophys Res Abstr 16:EGU2014–EGU15959
Berhane E, Meles K (2014) Community-managed exclosures in Tigray, Ethiopia, in Treesilience: An assessment of the resilience provided by trees in the drylands of Eastern Africa. ICRAF, Nayrobi, Kenya
Bikila NG, Tessema ZK, Abule EG (2016) Carbon sequestration potentials of semi-arid rangelands under traditional management practices in Borana, Southern Ethiopia. Agric Ecosyst Environ 223:108–114. https://doi.org/10.1016/j.agee.2016.02.028
Conant RT, Cerri CEP, Osborne BB, Paustian K (2017) Grassland management impacts on soil carbon stocks: a new synthesis. Ecol Appl 27(2):662–668
Darbyshire I, Lamb H, Umer M (2003) Forest clearance and regrowth in northern Ethiopia during the last 3000 years. Holocene 4:537–546
Dawit S et al. (2002) Soil organic matter dynamics in the subhumid agroecosystems of the Ethiopian highlands: evidence from natural 13C abundance and particle size fractionation. Soil Sci Soc Am J 66:969–978
Dlamini P, Chivenge P, Chaplot V (2016) Overgrazing decreases soil organic carbon stocks the most under dry climates and low soil pH: a meta-analysis shows. Agric Ecosyst Environ 221:258–269. https://doi.org/10.1016/j.agee.2016.01.026
Ethiopian Meteorological Service Agency (2007) Annual climate bulletin for the year 2007. Ministry of Water Resource, Addis Ababa, Ethiopia
Gebremedhin B, Pender J, Tesfay G (2002) Community natural resources management in the highlands of Ethiopia. Paper presented on International conference on policies for sustainable land management in the East African highlands. UNECA, Addis Ababa
Getnet A (2015) Forest carbon stock and variations along environmental gradients in Yeka forest and its implication for climate change mitigation a thesis submitted to center for environmental sciences. Ethiopia: Addis Ababa University
Giday K, Eshete G, Barklund P, Aertsen W, Muys B (2013) Wood biomass functions for Acacia abyssinica trees and shrubs and implications for provision of ecosystem services in a community managed exclosure in Tigray, Ethiopia. Journal of Arid Environments, 94, 80–86
Gregorich EG, Greer KJ, Anderson DW, Liang BC (1998) Carbon distribution and losses: erosion and deposition effects. Soil Tillage Res 47:291–302
HS Eggleston, L Buendia, K Miwa, T Ngara, K Tanabe (2006) IPCC guidelines for national greenhouse gas inventories. Forestry. The Institute for Global Environmental Strategies (IGES), Japan
Kadlec V, Holubík O, Procházková E, Urbanová J, Tippl M (2012) Soil organic carbon dynamics and its influence on the soil erodibility factor. Soil Water Resour 7(3):97–108
Kuyah S, Sileshi GW, Njoloma J, Mng’omba S, Neufeldt H (2014) Estimating aboveground tree biomass in three different miombo woodlands and associated land use systems in Malawi. Biomass Bioenergy 66:214–222
Lemma B et al. (2007) Factors controlling soil organic carbon sequestration under exotic tree plantations: a case study using the CO2 fix model in southwestern Ethiopia. For Ecol Manag 252(1–3):124–131
Letcher SG, Chazdon RL (2009) Rapid recovery of biomass, species richness, and species composition in a forest chronosequence in Northeastern Costa Rica. Biotropica 41:608–617
Li S, Juhász-Horváthb L, Harrison PA, Pintér L, Rounsevell MDA (2017) Relating farmer’s perceptions of climate change risk to adaptation behaviour in Hungary. J Environ Manag 185(1):21–30
Li Y, Zhao X, Chen Y, Luo Y, Wang S (2012) Effects of grazing exclusion on carbon sequestration and the associated vegetation and soil characteristics at a semi-arid desertified sandy site in Inner Mongolia, northern China. Can J Soil Sci 92(6):807–819. https://doi.org/10.4141/cjss2012-030
Marod D, Kutintara U, Tanaka H, Nakashizuka T (2004) Effects of drought and fire on seedling survival and growth under contrasting light conditions in a seasonal tropical forest. J Veg Sci 15:691–700
McIntosh PD, Allen RB, Scott N (1997) Effects of exclosure and management on biomass and soil nutrient pools in seasonally dry high country, New Zealand. J Environ Manag 51(2):169–186
Mekuria W, Aynekulu E (2011). Exclosure land management for restoration of the soils in degraded communal grazing lands in northern Ethiopia. Land Degradation and Development, 11p. (Online first). https://doi.org/10.1002/ldr.1146
Mekuria W, Langan S, Noble A, Johnston R (2014) Soil Organic Carbon and Nutrient Contents are not influenced by Exclosures Established in Communal Grazing Land in Nile Basin, Northern Ethiopia. In: Proceedings of International Conference on Advances in Agricultural, Biological and Environmental Sciences, Dubai (UAE)
Mekuria W, Langan S, Noble A, Johnston R (2017) Soil restoration after seven years of exclosure management in northwestern Ethiopia. Land Degrad. Dev. 28(4):1287–1297
Mekuria W, Veldkamp E, Mitiku H, Nyssen J, Muys B, Gebrehiwot K (2007) Effectiveness of exclosures to restore degraded soils as a result of overgrazing in Tigray, Ethiopia. J Arid Environ 69:270–284
Mekuria W (2013) Conversion of communal grazing lands into exclosures restored soil properties in the semi-arid lowlands of Northern Ethiopia. Arid Land Res Manag 27(2):153–166. https://doi.org/10.1080/15324982.2012.721858
Mengistu M, Teketay D, Håkan H, Yemshaw Y (2005) The role of enclosures in the recovery of woody vegetation in degraded dryland hillsides of central and northern Ethiopia. J Arid Environ 60:259–281
Reubens B, Heyn M, Genrehiwot K, Hermy M, Muys B (2007) Persistent soil seed banks for natural rehabilitation of dry tropical forests in northern Ethiopia. Tropicultura 25:4
Sansevero JBB, Prieto PV, de Moraes LFD, Rodrigues PJP (2011) Natural regeneration in plantations of native trees in lowland Brazilian Atlantic forest: community structure, diversity, and dispersal syndromes. Restor Ecol 19(3):379–389
Tesfaye A (2007) Plant diversity in Western Ethiopia: ecology, ethnobotany and conservation. Ph.D. thesis, Department of Biology, University of Oslo, Norway and Sweden
Vieira DL, Scariot A (2006) Principles of natural regeneration of tropical dry forests for restoration. Restor Ecol 14:11–20
Walkley A, Black IA (1934) An examination of the Degtjareff method for determining organic carbon in soils: effect of variations in digestion conditions and of inorganic soil constituents. Soil Sci 63:251–263
Wassie A, Sterck FJ, Teketay D, Bongers F (2009) Effects of livestock exclusion on tree regeneration in church forests of Ethiopia. For Ecol Manag 257:765–772
WBISPP (2000) Manual for woody biomass inventory. Woody biomass inventory and strategic planning project, Woody Biomass Inventory and Strategic Planning Project, Ministry of Agriculture, Addis Ababa, Ethiopia
Yusran FH (2010) Soil organic carbon losses: the balance between respiration and leaching, and phosphorus mobility in lateritic soils. J Tropic Soils 15(3):245–254
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This research is supported by funding from the Department for International Development (DfID) under the Climate Impact Research Capacity and Leadership Enhancement (CIRCLE) program.
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Hishe, H., Giday, K., Soromessa, T. et al. Should we Leave Nature Unattended or Assist through Enrichment to Foster Climate Change Mitigation? Exclosure Management in the Highlands of Ethiopia. Environmental Management 65, 490–499 (2020). https://doi.org/10.1007/s00267-020-01259-8
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DOI: https://doi.org/10.1007/s00267-020-01259-8