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Land Restoration: Reclaiming Landscapes for a Sustainable Future

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Abstract

Land Restoration: Reclaiming Landscapes for a Sustainable Future provides a holistic overview of land degradation and restoration in that it addresses the issue of land restoration from the scientific and practical development points of view. Furthermore, the breadth of chapter topics and contributors cover the topic and a wealth of connected issues, such as security, development, and environmental issues. The use of graphics and extensive references to case studies also make the work accessible and encourage it to be used for reference, but also in active field-work planning. Land Restoration: Reclaiming Landscapes for a Sustainable Future brings together practitioners from NGOs, academia, governments, and the United Nations Convention to Combat Desertification (UNCCD) to exchange lessons to enrich the academic understanding of these issues and the solution sets
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Edited by:
Ilan Chabay Institute of Advanced Sustainability
Studies, Potsdam, Germany
Martin Frick Representative of Germany to UN
Organisations based in Germany
Jennifer Helgeson Applied Economics Office of the
National Institute of Standards and Technology (NIST)
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... Only about 3 percent of the total global surface is arable (Chabay et al., 2016), but as a result of the problems of land degradation in the developing countries, large portion of the productive agricultural land is being depleted (Barbier, 1997). As a result of this degradation, there becomes immense pressure on the lives of billions of people of the world (Le et al., 2016) and its impact is more pronounced on poor people (Ellis-Jones, 1999;Gisladottir and Stocking, 2005;Nkonya et al., 2016a) and also on the drylands of the world (Gisladottir and Stocking, 2005). ...
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Grassland degradation and the concomitant loss of soil organic carbon is widespread in tropical arid and semi-arid regions of the world. Afforestation of degraded grassland, sometimes by using invasive alien trees, has been put forward as a legitimate climate change mitigation strategy. However, even in cases where tree encroachment of degraded grasslands leads to increased soil organic carbon, it may come at a high cost since the restoration of grassland-characteristic biodiversity and ecosystem services will be blocked. We assessed how invasion by Prosopis juliflora and restoration of degraded grasslands in a semi-arid region in Baringo, Kenya affected soil organic carbon, biodiversity and fodder availability. Thirty years of grassland restoration replenished soil organic carbon to 1 m depth at a rate of 1.4% per year and restored herbaceous biomass to levels of pristine grasslands, while plant biodiversity remained low. Invasion of degraded grasslands by P. juliflora increased soil organic carbon primarily in the upper 30 cm and suppressed herbaceous vegetation. We argue that, in contrast to encroachment by invasive alien trees, restoration of grasslands in tropical semi-arid regions can both serve as a measure for climate change mitigation and help restore key ecosystem services important for pastoralists and agro-pastoralist communities.
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The Sustainable Development Goals (SDGs), adopted by all UN Member States in 2015, guide societies to achieve a better and more sustainable future. Depleting fossil fuels and climate change will strongly increase the demand for biomass, as governments shift towards bioeconomies. Though research has estimated future biomass availability for bioenergetic uses, the implications for sustainable development have hardly been discussed; e.g., how far the estimates account for food security, sustainability and the satisfaction of basic human needs, and what this implies for intragenerational equity. This research addresses the gap through a systematic literature review and our own modeling. It shows that the biomass models insufficiently account for food security; e.g., by modeling future food consumption below current levels. The available biomass, if fairly distributed, can globally replace fossil fuels required for future material needs but hardly any additional energy needs. To satisfy basic human needs, the material use of biomass should, therefore, be prioritized over bioenergy. The different possibilities for biomass allocation and distribution need to be analyzed for their potential negative implications, especially for the poorer regions of the world. Research, society, business and politicians have to address those to ensure the ’leave no one behind´ commitment of the SDGs.
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