The Great Green Forest is here and expanding all on its own: A call for action

Prosopis juliflora is recognized as one of the most invasive tree species worldwide. Following widespread introductions throughout arid and semi-arid regions of Africa and throughout the world, it has spread rapidly, threatening natural ecosystems and livelihoods. Control through utilization as a resource is now accepted as the way forward in developing countries, but efforts have so far been uncoordinated, with only isolated impacts. This paper reports on the global state of knowledge and recent advances, but focuses on prosopis-related research and innovations from IGAD member countries; the successes, failures, challenges and opportunities. It underlines the need to build and apply scientific knowledge to scale up new, resilient, drought-proof livelihood options in the Greater Horn of Africa and elsewhere where introduced, from value-added prosopis wood and non wood products. The authors estimate that there are at least five million hectares of prosopis forest across the region of the perhaps ten million throughout Africa, and growing significantly in extent every year. Experiences from the native range such as in Peru are well documented, where community associations sustainably manage and make a living from fuel, fodder, food, honey and timber from their prosopis forests. Efforts in Ethiopia, Djibouti and Kenya have had mixed results, but milling the sweet protein-rich pods into animal feed is becoming increasingly popular with the introduction of appropriate small scale technologies. Its use as a human food ingredient has also been promoted, though with little uptake, but there is sharp rise in the use of prosopis charcoal in the region, and the possibility of electricity generation using wood chips (bioenergy), with the transfer of experiences from India where there are at least 15 power stations fueled entirely by prosopis. But much more can be done by applying scientific knowledge and innovation to enhance the role of prosopis in improving food security, climate change mitigation and adaptation, and building resilience for millions of the poorest rural and urban people in the Greater Horn of Africa, with great potential for exchange and scaling up in other arid areas in Africa, Asia and the Americas. This paper is a call to the African Union, national governments, IGAD, IFAD, FAO, the Arab League and other international, regional and bilateral donors, to come together and support a regional research and development programme to push the frontiers on prosopis management and utilization and develop a transnational strategy, as the impacts are potentially enormous and immediate. The initial objectives are to take stock of existing knowledge and practices, assess prosopis forest areas throughout the region, estimate wood and pod volumes and production rates, document prosopis management and utilization experiences, enhance South-South knowledge sharing, and rapidly and effectively scale up the successes

Dryland restoration successes in the Sahel and Greater Horn of Africa show how to increase scale and impact

Drylands occupy more than 40% of the world’s land area and are home to some two billion people. This includes a disproportionate number of the world’s poorest people, who live in degraded and severely degraded landscapes. The United Nations Convention to Combat Desertification states on its website that 12 million hectares are lost annually to desertification and drought, and that more than 1.5 billion people are directly dependent on land that is being degraded, leading to US$42 billion in lost earnings each year. In Africa, three million hectares of forest are lost annually, along with an estimated 3% of GDP, through depleted soils. The result is that two-thirds of Africa’s forests, farmlands and pastures are now degraded. This means that millions of Africans have to live with malnutrition and poverty, and in the absence of options this further forces the poor to overexploit their natural resources to survive. This in turn intensifies the effects of climate change and hinders economic development, threatening ecological functions that are vital to national economies

Savannahs of Asia: Antiquity, biogeography, and an uncertain future

The savannahs of Asia remain locally unrecognized as distinctive ecosystems, and continue to be viewed as degraded forests or seasonally dry tropical forests. These colonial-era legacies are problematic, because they fail to recognize the unique diversity of Asian savannahs and the critical roles of fire and herbivory in maintaining ecosystem health and diversity. In this review, we show that: the palaeo-historical evidence suggests that the savannahs of Asia have existed for at least 1 million years, long before widespread landscape modification by humans; savannah regions across Asia have levels of C4 grass endemism and diversity that are consistent with area-based expectations for non-Asian savannahs; there are at least three distinct Asian savannah communities, namely deciduous broadleaf savannahs, deciduous fine-leafed and spiny savannahs and evergreen pine savannahs, with distinct functional ecologies consistent with fire- and herbivory-driven community assembly. Via an analysis of savannah climate domains on other continents, we map the potential extent of savannahs across Asia. We find that the climates of African savannahs provide the closest analogues for those of Asian deciduous savannahs, but that Asian pine savannahs occur in climates different to any of the savannahs in the southern continents. Finally, we review major threats to the persistence of savannahs in Asia, including the mismanagement of fire and herbivory, alien woody encroachment, afforestation policies and future climate uncertainty associated with the changing Asian monsoon. Research agendas that target these issues are urgently needed to manage and conserve these ecosystems. This article is part of the themed issue ‘Tropical grassy biomes: linking ecology, human use and conservation’

Reimagining invasions; the social and cultural impacts of Prosopis on pastoralists in Southern Afar

Abstract Whilst the environmental impacts of biological invasions are clearly conceptualised and there is growing evidence on the economic benefits and costs, the social and cultural dimensions remain poorly understood. This paper presents the perceptions of pastoralist communities in southern Afar, Ethiopian lowlands, on one invasive species, Prosopis juliflora. The socio-cultural impacts are assessed, and the manner in which they interact with other drivers of vulnerability, including political marginalisation, sedentarisation and conflict, is explored. The research studied 10 communities and undertook semi-structured interviews and focus group discussions with pastoralists and agro-pastoralists. These results were supported by interviews with community leaders and key informants. The benefits and costs were analysed using the asset-based framework of the Sustainable Livelihoods Framework and the subject-focused approach of Wellbeing in Development. The results demonstrate that the costs of invasive species are felt across all of the livelihood capital bases (financial, natural, physical, human and social) highlighted within the framework and that the impacts cross multiple assets, such as reducing access through blocking roads. The concept of Wellbeing in Development provides a lens to examine neglected impacts, like conflict, community standing, political marginalisation and cultural impoverishment, and a freedom of definition and vocabulary to allow the participants to define their own epistemologies. The research highlights that impacts spread across assets, transcend objective and subjective classification, but also that impacts interact with other drivers of vulnerability. Pastoralists report deepened and broadened conflict, complicated relationships with the state and increased sedentarisation within invaded areas. The paper demonstrates that biological invasions have complex social and cultural implications beyond the environmental and economic costs which are commonly presented. Through synthesising methodologies and tools which capture local knowledge and perceptions, these implications and relationships are conceptualised

Restoring African Drylands

ETFRN News 60 focuses on dryland restoration in the Sahel and the Greater Horn of Africa. It collates 36 articles from more than 100 contributors, including examples of remarkable increases in tree cover and improved agricultural yields over large areas of the Western Sahel, landscape restoration in Ethiopia, and examples from many other countries

Algaroba - planta invasora ou recurso florestal valioso?

O debate sobre algaroba; Erradicação ou exploração?; O que são algarobeiras? A invasão indesejável; A solução seria a erradicação ou o controle? Explorando a algarobeira - técnicas de manejo sustentável; Melhoramento e conversão de povoamentos; Prevenindo a reinfestação.bitstream/item/175864/1/33359.pd