Review Articles

Biofuels and biodiversity in South Africa

Ryan Blanchard, David M. Richardson, Patrick J. O’Farrell, Graham P. von Maltitz
South African Journal of Science | Vol 107, No 5/6 | a186 | DOI: https://doi.org/10.4102/sajs.v107i5/6.186 | © 2011 Ryan Blanchard, David M. Richardson, Patrick J. O’Farrell, Graham P. von Maltitz | This work is licensed under CC Attribution 4.0
Submitted: 01 April 2010 | Published: 03 May 2011

About the author(s)

Ryan Blanchard, Council for Scientific and Industrial Research, Stellenbosch, South Africa
David M. Richardson, Stellenbosch University, Stellenbosch, South Africa
Patrick J. O’Farrell, Council for Scientific and Industrial Research, Stellenbosch, South Africa
Graham P. von Maltitz, Council for Scientific and Industrial Research, Pretoria, South Africa

Abstract

The South African government, as part of its efforts to mitigate the effects of the ongoing energy crisis, has proposed that biofuels should form an important part of the country’s energy supply. The contribution of liquid biofuels to the national fuel supply is expected to be at least 2% by 2013. The Biofuels Industrial Strategy of the Republic of South Africa of 2007 outlines key incentives for reaching this target and promoting the development of a sustainable biofuels industry. This paper discusses issues relating to this strategy as well as key drivers in biofuel processing with reference to potential impacts on South Africa’s rich biological heritage.

Our understanding of many of the broader aspects of biofuels needs to be enhanced. We identify key areas where challenges exist, such as the link between technology, conversion processes and feedstock selection. The available and proposed processing technologies have important implications for land use and the use of different non-native plant species as desired feedstocks. South Africa has a long history of planting non-native plant species for commercial purposes, notably for commercial forestry. Valuable lessons can be drawn from this experience on mitigation against potential impacts by considering plausible scenarios and the appropriate management framework and policies. We conceptualise key issues embodied in the biofuels strategy, adapting a framework developed for assessing and quantifying impacts of invasive alien species. In so doing, we provide guidelines for minimising the potential impacts of biofuel projects on biodiversity.


Keywords

biofuels; biodiversity; biological invasions; conservation biogeography; impact

Metrics

Total abstract views: 2967
Total article views: 5279

References


Fischer G, Hizsnyik E, Prieler S, Shah M, van Velthuizen H. Biofuels and food security. Laxenburg: International Institute for Applied Systems Analysis; 2009.

Connor DJ, Hernandez CG. Crops for biofuels: Current status and prospects for the future. In: Howarth RW, Bringezu S, editors. Biofuels: Environmental consequences and interactions with changing land use. Proceedings of the Scientific Committee on Problems of the Environment (SCOPE) International Biofuels Project Rapid Assessment; 2008 Sep 22–25; Gummersbach, Germany. Ithaca, NY: Cornell University; 2009. p. 65–80.

European Commission. An EU strategy for biofuels. Brussels: Commission of the European Communities; 2006.

Lynd LR, Von Blottnitz H, Tait B, et al. Converting plant biomass to fuels and commodity chemicals in South Africa: A third chapter? S Afr J Sci. 2003;99:499–507.

Hill J, Nelson E, Tilman D, Polasky S, Tiffany D. Environmental, economic, and energetic costs and benefits of biodiesel and ethanol biofuels. Proc Natl Acad Sci USA. 2006;103:11206–11210. doi:10.1073/pnas.0604600103, PMid:16837571, PMid:1544066

Junginger M, Faaij A, Rosillo-Calle F, Wood J. The growing role of biofuels – Opportunities, challenges and pitfalls. Intern Sugar J. 2006;108:618–629.

Von Maltitz GP, Brent A. Assessing the biofuel options for southern Africa. Paper presented at: The 2nd CSIR Biennial Conference. Science real and relevant: 2nd CSIR Biennial Conference; 2008 Nov 17–18; Pretoria, South Africa. Pretoria: CSIR; 2008.

Pimentel D, Marklein A, Toth MA, et al. Food versus biofuels: Environmental and economic costs. Hum Ecol. 2009;37:1–12. doi:10.1007/s10745-009-9215-8

Chakauya E, Beyene G, Chikwamba RK. Food production needs fuel too: Perspectives on the impact of biofuels in southern Africa: Commentary. S Afr J Sci. 2009;105:174–181.

Searchinger T, Heimlich R, Houghton RA, et al. Use of US croplands for biofuels increases greenhouse gases through emissions from land-use change. Science. 2008;319:1238–1240. doi:10.1126/science.1151861, PMid:18258860

Phalan B. The social and environmental impacts of biofuels in Asia: An overview. Appl Energ. 2009;86:S21–S29. doi:10.1016/apenergy.2009.04.046

Dauvergne P, Neville KJ. The changing north–south and south–south political economy of biofuels. Third World Q. 2009;30:1087–1102. doi:10.1080/01436590903037341

Balmford A. Conservation planning in the real world: South Africa shows the way. Trends Ecol Evol. 2003;18:435–438. doi:10.1016/S0169-5347(03)00217-9

Rouget M, Reyers B, Jonas Z, et al. South African national spatial biodiversity assessment 2004: Technical report. Volume 1: Terrestrial component. Pretoria: South African National Biodiversity Institute; 2004.

Biggs R, Scholes RJ. Land cover changes in South Africa 1911–1993. S Afr J Sci. 2002;98:420–424.

Tilman D, Fargione J, Wolff B, et al. Forecasting agriculturally driven global environmental change. Science. 2001;292:281–284. doi:10.1126/science.1057544, PMid:11303102

Richardson DM, Cambray JA, Chapman RA, et al. Vectors and pathways of biological invasions in South Africa: Past, present and future. In: Ruiz G, Carlton JT, editors. Invasive species vectors and management strategies. Washington DC: Island Press, 2003; p. 292–349.

Richardson DM, Blanchard R. Learning from our mistakes: Minimizing problems with invasive biofuel plants. Curr Opin Environ Sustain. 2011;3:36–42. doi:10.1016/j.cosust.2010.11.006

Department of Minerals and Energy. The biofuel industrial strategy of the Republic of South Africa [document on the Internet]. c2007 [cited 2010 Mar 12]. Available from: www.dme.gov.za/pdfs/energy/renewable/biofuels_indus_strat.pdf(2).pdf

Department of Minerals and Energy. White Paper on Renewable Energy [document on the Internet]. c2003 [cited 2010 Mar 12]. Available from: http://www.dme.gov.za/pdfs/energy/renewable/white_paper_renewable_energy.pdf

Jumbe CBL, Msiska FBM, Madjera M. Biofuels development in sub-Saharan Africa: Are the policies conducive? Energ Policy. 2009;37:4980–4986. doi:10.1016/j.enpol.2009.06.064

Funke T, Strauss PG, Meyer F. Modelling the impacts of the industrial biofuels strategy on the South African agricultural and biofuel subsectors. Agrekon. 2009;48:223–244. doi:10.1080/03031853.2009.9523825

Van der Walt M, Schoeman JL. Overview of land suitability for biofuel crops. Report No.: GW/A/2006/17. Pretoria: Department of Agriculture and ARC-Soil Climate and Water; 2006.

Gush MB. Measurement of water use by Jatropha curcas L. using the heat-pulse velocity technique. Water SA. 2008;34:579–584.

Tilman D, Socolow R, Foley JA, et al. Beneficial biofuels – The food, energy, and environment trilemma. Science. 2009;325:270–271. doi:10.1126/science.1177970, PMid:19608900

Sala OE, Sax D, Leslie H. Biodiversity consequences of biofuel production. In: Howarth RW, Bringezu S, editors. Biofuels: Environmental consequences and interactions with changing land use. Proceedings of the Scientific Committee on Problems of the Environment (SCOPE) International Biofuels Project Rapid Assessment; 2008 Sep 22–25; Gummersbach, Germany. Ithaca NY: Cornell University; 2009. p. 127–137.

Pegels A. Renewable energy in South Africa: Potentials, barriers and options for support. Energ Policy. 2010;38:4945–4954. doi:10.1016/j.enpol.2010.03.077

Raghu S, Spencer JL, Davis AS, Wiedenmann RN. Ecological consideration in the sustainable development of terrestrial biofuel crops. Curr Opin Environ Sustain. 2011;3:15–23. doi:10.1016/j.cosust.2010.2010.11.005, doi:10.1016/j.cosust.2010.11.005

Wessels KJ, Reyers B, Van Jaarsveld AS. Incorporating land cover information into regional biodiversity assessments in South Africa. Anim Conserv. 2000;3:67–79. doi:10.1111/j.1469-1795.2000.tb00088.x

Power AG. Ecosystem services and agriculture: Tradeoffs and synergies. Phil Trans R Soc B. 2010;365:2959–2971. doi:10.1098/rstb.2010.0143, PMid:20713396, PMid:2935121

Tilman D, Cassman KG, Matson PA, Naylor R, Polasky S. Agricultural sustainability and intensive production practices. Nature. 2002;418:671–677. doi:10.1038/nature01014, PMid:12167873

Gaertner M, Den Breeyen A, Hui C, Richardson DM. Impacts of alien plant invasions on species richness in Mediterranean-type ecosystem: A meta-analysis. Prog Phys Geogr. 2009;33:319–338. doi:10.1177/0309133309341607

Firbank L. Assessing the ecological impacts of bioenergy projects. Bioenerg Res. 2008;1:12–19. doi:10.1007/s12155-007-9000-8

McGeoch MA, Kalwij JM, Rhodes JI. A spatial assessment of Brassica napus gene flow potential to wild and weedy relatives in the Fynbos Biome. S Afr J Sci. 2009;105:109–115.

Richardson DM, Van Wilgen BW. Invasive alien plants in South Africa: How well do we understand the ecological impacts? S Afr J Sci. 2004;100:45–52.

Le Maitre DC, Van Wilgen BW, Gelderblom CM, Bailey C, Chapman RA, Nel JA. Invasive alien trees and water resources in South Africa: Case studies of the costs and benefits of management. Forest Ecol Manage. 2002;160:143–159. doi:10.1016/S0378-1127(01)00474-1

Lorentzen J. Global sugar, regional water, and local people: EU sugar regime liberalisation, rural livelihoods, and the environment in the Incomati River Basin: Review article. S Afr J Sci. 2009;105:49–53. doi:10.1590/S0038-23532009000100020

Mathews JA. Biofuels, climate change and industrial development: Can the tropical South build 2000 biorefineries in the next decade? Biofuels Bioprod Bioref. 2008;2:103–125. doi:10.1002/bbb.63

Lal R, Pimentel D. Biofuels from crop residues. Soil Tillage Res. 2007;93:237–238. doi:10.1016/j.still.2006.11.007

Plieninger T, Gaertner M. Harnessing degraded lands for biodiversity conservation. J Nat Conserv. 2011;19:18–23. doi:10.1016/j.jnc.2010.04.001

Parker IM, Simberloff D, Lonsdale WM, et al. Impact: Toward a framework for understanding the ecological effects of invaders. Biol Invas. 1999;1:3–19. doi:10.1023/A:1010034312781

Gabriel D, Sait SM, Hodgson JA, Schmutz U, Kunin WE, Benton TG. Scale matters: The impact of organic farming on biodiversity at different spatial scales. Ecol Lett. 2010;13:858–869. doi:10.1111/j.1461-0248.2010.01481.x, PMid:20482572

Wright M, Brown RC. Establishing the optimal sizes of different kinds of biorefineries. Biofuels Bioprod Bioref. 2007;1:191–200. doi:10.1002/bbb.25

Worster CA, Mundt CC. The effect of diversity and spatial arrangement on biomass of agricultural cultivars and native plant species. Basic Appl Ecol. 2007;8:521–532. doi:10.1016/j.baae.2006.10.002

Achten WMJ, Mathijs E, Verchot L, Singh VP, Aerts R, Muys B. Jatropha biodiesel fueling sustainability? Biofuels Bioprod Bioref. 2007;1:283–291. doi:10.1002/bbb.39

Cheesman OD. Environmental impacts of sugar production. Wallingford UK: CABI Publishing; 2004. doi:10.1079/9780851999814.0000, doi:10.1079/9780851999814.0001

Koh LP, Levang P, Ghazoul J. Designer landscapes for sustainable biofuels. Trends Ecol Evol. 2009;24:431–438. doi:10.1016/j.tree.2009.03.012

Koh LP. Impacts of land use change on south-east Asian forest butterflies: A review. J Appl Ecol. 2007;44:703–713. doi:10.1111/j.1365-2664.2007.01324.x

Ogunwole JO, Chaudhary DR, Ghosh A, Daudu CK, Chikara J, Patolia JS. Contribution of Jatropha curcas to soil quality improvement in a degraded Indian entisol. Acta Agric Scand B – Plant Soil Sci. 2008;58:245–251.

Yelenik S, StockWD, Richardson DM. Ecosystem-level impacts of invasive Acacia saligna in the South African fynbos. Rest Ecol. 2004;12:44–51. doi:10.1111/j.1061-2971.2004.00289.x

Richardson DM. Forestry trees as invasive aliens. Conserv Biol. 1998;12:18–26. doi:10.1046/j.1523-1739.1998.96392.x, doi:10.1111/j.1523-1739.1998.96392.x

Van Wilgen BW, Reyers B, Le Maitre DC, Richardson DM, Schonegevel L. A biome-scale assessment of the impact of invasive alien plants on ecosystem services in South Africa. J Environ Manage. 2008;89:336–349. doi:10.1016/j.jenvman.2007.06.015, PMid:17765388

Louw WJA. General history of the South African forest industry: 1975 to 1990: Information paper. S Afr For J. 2004;200:77–86.

Le Maitre DC, Chapman RA. The impact of invading alien plants on surface water resources in South Africa: A preliminary assessment. Water SA. 2000;26:397–408.

Barney JN, DiTomaso JM. Nonnative species and bioenergy: Are we cultivating the next invader. BioScience. 2008;58:64–70. doi:10.1641/B580111

Van Wilgen BW, Richardson DM. Current and future consequences of invasion by alien species: A case study from South Africa. In: Perrings C, Mooney HA, Williamson MH, editors. Bioinvasions and globalization. Oxford: Oxford University Press; 2009. doi:10.1093/acprof:oso/9780199560158.003.0013

Louw WJA. General history of the South African forest industry: 2003 to 2006: Information paper. S Afr For J. 2006;208:79–88.

Diaz S, Fargione J, Chapin FS, Tilman D. Biodiversity loss threatens human well-being. PLoS Biol. 2006;4:1300–1305. doi:10.1371/journal.pbio.0040277, PMid:16895442, PMid:1543691

Richardson DM, Hellmann JJ, McLachlan J, et al. Multidimensional evaluation of managed relocation. Proc Natl Acad Sci USA. 2009;106:9721–9724. doi:10.1073/pnas.0902327106, PMid:19509337, PMid:2694035

Churchill HC, Van der Zel DW. The growing of poplars for a niche market. S Afr For J. 1996;177:55–59.

Pott RM. Plantation forestry and its impact on biodiversity and water. S Afri For J. 1997;180:45–48.

Scholes MC. Biological processes as indicators of sustainable plantation forestry: Evidence for sustainable plantation forestry. S Afr J Sci. 2002;195:57–62.

O’Connor TG, Kuyler P. Impact of land use on the biodiversity integrity of the moist sub-biome of the grassland biome, South Africa. J Environ Manage. 2009;90:384–395. doi:10.1016/j.jenvman.2007.10.012, PMid:18082314

Wessels KJ, Reyers B, Van Jaarsveld AS, Rutherford MC. Identification of potential conflict areas between land transformation and biodiversity conservation in north-eastern South Africa. Agric Ecosyst Environ. 2003;95:157. doi:10.1016/S0167-8809(02)00102-0

SA government gazette. Department of Environmental Affairs and Tourism - General notice 347 [document on the Internet]. c2009 [cited 2010 Mar 12] Available from: http://www.environment.gov.za/HotIssues/2009/invsvSpecies/alienInvsvSpecs.html

Van Wilgen BW, Le Maitre DC, Cowling RM. Ecosystem services, efficiency, sustainability and equity: South Africa’s working for water programme. Trends Ecol Evol. 1998;13:378. doi:10.1016/S0169-5347(98)01434-7

Nel JL, Richardson DM, Rouget M, et al. A proposed classification of invasive alien plant species in South Africa: Towards prioritizing species and areas for management action. S Afr J Sci. 2004;100:53–64.

Buddenhagen CE, Chimera C, Clifford P. Assessing biofuel crop invasiveness: A case study. PLoS ONE. 2009;4:e5261. doi:10.1371/journal.pone.0005261, PMid:19384412, PMid:2668076

Hellmann JJ, Byers JE, Bierwagen BG, Dukes JS. Five potential consequences of climate change for invasive species. Conserv Biol. 2008;22:534–543. doi:10.1111/j.1523-1739.2008.00951.x, PMid:18577082

IUCN. Guidelines on biofuels and invasive species. Gland, Switzerland: IUCN; 2009.

Winkler H. Energy policies for sustainable development in South Africa. Options for the future. Cape Town: Energy Research Centre, University of Cape Town; 2006.

Achten WMJ, Verchot L, Franken YJ, et al. Jatropha bio-diesel production and use. Biomass Bioenerg. 2008;32:1063–1084. doi:10.1016/j.biombioe.2008.03.003

Achten WMJ, Maes WH, Aerts R, et al. Jatropha: From global hype to local opportunity. J Arid Environ. 2010;74:164–165. doi:10.1016/j.jaridenv.2009.08.010

Maes WH, Achten WMJ, Reubens B, Raes D, Samson R, Muys B. Plant-water relationships and growth strategies of Jatropha curcas L. seedlings under different levels of drought stress. J Arid Environ. 2009;73:877–884. doi:10.1016/j.jaridenv.2009.04.013



Reader Comments

Before posting a comment, read our privacy policy.

Post a comment (login required)

Crossref Citations

No related citations found.