Daniel Callo-ConchaRPTU Landau and University of Bonn
Daniel Callo-Concha
PhD
About
56
Publications
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673
Citations
Citations since 2017
Introduction
Publications
Publications (56)
The impacts on food security of a transition from agriculture focused on local consumption to the participation in global markets are uncertain, with both positive and negative effects reported in the literature. In Ethiopia, coffee production for global markets has attracted growers from across the country to the coffee-forest zones. From a nation...
In Ethiopia, urban areas are defined basically as places having a minimum population of 2,000. The current coverage of urban areas in the country is less than 20%, and even the majorities are small towns that account more than 85% of the urbanized areas in the country. However, urbanization in the country is increasing rapidly, at a rate of 4.63% a...
In Ethiopia, urban boundary roles are ineffective, leading to conflicting urban development, particularly on areas share borders and are administered by different regional governments. Therefore, this study examined the nature of shared urban boundaries and related social-ecological challenges. It employed a case study approach, and the findings ar...
In West Africa, malaria is a leading cause of disease-induced fatalities. While it is generally thought that urbanization reduces malaria incidence, the relationship between urbanicity, i.e., the impact of living in urban areas, and transmission remains unclear. This study aims to explore this association in Ghana, using eight district-level datase...
Until recently, many so-called neglected and underutilized species (NUS) were not present in global markets despite playing a pivotal role in the local livelihoods in their places of origin. Today, some NUS receive substantial global interest and face growing global demands. Sudden increases in consumer demand trigger prices to rise; land-use chang...
Agroforestry generally contributes to rural food and nutrition security (FNS). However, specialization on commodity-oriented agroforestry practices or management strategies can weaken local food sourcing when terms of trade fluctuate, as is the case of coffee in Ethiopia. Hence, this study assessed the trade-offs that smallholder farming households...
Ethiopia is confronted with the paradox of hosting hundreds of edible plants and having high food and nutritional insecurity. Meals are mainly made up of staples and often lack of protein and micronutrients. Therefore, a large section of the population, particularly children and women, are malnourished. We hypothesize that wild edible plant species...
Background
Several studies that aim to enhance the understanding of malaria transmission and persistence in urban settings failed to address its underlining complexity. This study aims at doing that by applying qualitative and participatory-based system analysis and mapping to elicit the system’s emergent properties.
Methods
In two experts’ worksh...
Market access influences the dietary diversity and food security for smallholder
households in many ways. In Ethiopia, most smallholders are subsistence farmers who
have poor access to markets. This study used primary data from a household survey to
examine the relationship between market access and the dietary diversity and food
security for 324 s...
Several studies that aim to enhance the understanding of malaria transmission and persistence in urban settings failed to address its underlining complexity. We aim at doing that by applying a qualitative and participatory-based system analysis and mapping to elicit the system’s emergent properties. In two experts’ workshops, we sketched and refine...
Natural and Working Landscapes (NWL) provide physical, social and spiritual benefits to human beings, as a result, people have been engaging and modifying landscapes to meet their needs. However, there are side impacts, visible in urban areas as they are aggravated by the increase in human activities. In Ethiopia, one of the fastest-growing urbaniz...
The bioeconomy concept has the aim of adding sustainability to the production, transformation and trade of biological goods. Though taken up throughout the world, the development of national bioeconomies is uneven, especially in the global South, where major challenges exist in Sub-Saharan Africa with respect to implementation.
This special issue...
The bioeconomy concept has the aim of adding sustainability to the production, transformation and trade of biological goods. Though taken up throughout the world, the development of national bioeconomies is uneven, especially in the global South, where major challenges exist in Sub-Saharan Africa with respect to implementation. The BiomassWeb proje...
Despite the deplorable condition of slums, it still harbors most of the urban population and may continue to do so, especially in Africa where slum growth is on a par with urban growth. This is the case in Lagos, a megacity reportedly dominated by slum dwellers, with limited knowledge on residential choices of slum dwellers and its contribution to...
![Figure 1. Overview of the research methodology (based on [50,55,56])....](publication/336803024/figure/fig1/AS:817874662879232@1572007923431/Overview-of-the-research-methodology-based-on-50-55-56-Overview-of-the-research_Q320.jpg)
The high mining potential of the Peruvian Andes has promoted booming foreign investments. The mining activity takes place on campesino community lands and headwaters. Once the government awards a mining concession, mining companies must regularly negotiate land rent with communities over the whole duration of the mining operation, often leading to...
Africa’s urban population presently totals 439 million people or forty per cent of its total population, a share that is expected to rise to 1.1 billion or 56 per cent by 2050. Urbanisation is constituted not only in terms of demographic and land expansion, but also in the transformation of the environment and social conditions in the growing urban...
Demographic forecasts put Lagos as one of the cities with the highest population growth. Past trends show correlations between urban growth and slum growth, thereby creating a major challenge for sustainable city planning. This study explores the drivers of slum development in Lagos, and simulates scenarios for slum growth through coupling logistic...
Farming is the main economic activity in the West African savannah.
It is, however, characterized by high variability. The situation is fueled by
poor soil fertility, uncertain water availability, limited infrastructure and
persistent institutional weakness. The effects of climate change, which are particularly acute in the region, have exacerba...
Rapid population growth coupled with food demand make land for agriculture scarcer obliging farmers to make use of any available piece of land at their disposal for crops production. This preferential use of land for crops production may appear to be competitive with tree keeping on farm. To elucidate that, the trade-off between crop production and...
The montane rainforest of southwestern Ethiopia, coffee’s centre of origin, is dominated by multifunctional and multi-species agroforestry systems that broadly benefit farmer livelihoods. Although economic and environmental advantages are widely praised, the contributions of these systems to food and nutrition are mostly unaccounted. Hence, we eval...
Son varios los retos contemporáneos en el uso de suelo que acentúan su cambio, como la contaminación y la degradación. En esta comunicación corta se examinan los sistemas agrícolas multifuncionales como alternativa para operacionalizar la sostenibilidad productiva, ecológica y económica. No obstante, se hace hincapié en su inherente complejidad, qu...
Urban forestry has the potential to address many urban environmental and sustainability challenges. Yet in Africa, urban forest characterization and its potential to contribute to human wellbeing are often neglected or restrained. This paper describes the structure, diversity, and composition of an urban forest and its potential to store carbon as...
Abstract: Food and nutrition security (FNS) rests on five pillars: availability, access, utilization,
stability, and sovereignty. We assessed the potentials of local agroforestry practices (AFPs) for enabling
FNS for smallholders in the Yayu Biosphere Reserve (southwestern Ethiopia). Data was collected
from 300 households in a stratified random sam...
Upgrading all slums in Lagos by 2030 will an ambitious task, given that more than 70% of its residents resides in slums. Furthermore, there is no recent study identifying neither the slums nor their temporal growth/development pattern in Lagos that can backstop any slum management initiative. This study aims to contribute by applying object-based i...
Climate change is a great threat to the already climate-unstableWest Africa. Current and potential impacts are especially hard on farming in the Sudan savannah, thus adaptation is widely advised and encouraged, and already occurring. In the study sites Dassari, Benin, and Dano, Burkina Faso, farmers' climate change perceptions and practiced coping...
Conserving biodiversity in cities is essential to halting global biodiversity loss. Nevertheless, there is paucity of data on the underlying mechanisms shaping species assemblages and species/trait diversity-productivity relationships in urban landscapes. The objectives of this study were to; 1) compile tree species diversity of different green spa...
Urban green spaces (UGS) contribute to mitigate climate change impacts via carbon sequestration and offer several co-benefits in cities. This contribution, however, is omitted in most national and regional carbon stock estimates, and related literature in the global south is – at best – fragmentary. Therefore, this paper quantifies and maps the dis...
This paper presents the theoretical, operational and implementation premises that guide the development research agenda of the Center of Development Research (ZEF), exemplified by three agroforestry-related case studies. First, the importance, assumptions, conditions and priorities for development research in the context of developing countries are...
Since its foundation in the 1970’s, agroforestry science has evolved from setting its concepts, research approaches and flagship technologies towards its increasing contribution to ecologically sound land use, food security and income generation in the global North and South. The Third World Congress on Agroforestry held in Delhi in April 2014 cont...
The Agroforestry Tree Domestication Program was globally launched in the 1990’s by the World Agroforestry Center to increase farmers’ living standards and slow deforestation. After 20 years of operation, we screen the impacts on farmers’ livelihoods and prospects in one of the implementation sites: the Ucayali region of the Peruvian Amazon. We cont...
The effects of climate change are widely threatening West African farming. The case of the farmers in the West African Sudan savannah is particularly severe due to the specific ecological vulnerability and the political and socioeconomic instability in the region.
Since 2012, the West African Science Service on Climate Change and Adapted Land Use (...
In a participatory framework, the
multifunctionality of agroforestry systems was assessed
by applying multicriteria and multivariate analyses to
identify ecological, agronomic and administrative proxies
and integrate these into factors, and evaluate their effects
on system performance. The assessment framework was
tested in 70 farms in the municipa...
Resilience, vulnerability and adaptability have emerged as dominant concepts in the study of disturbance and change of social-ecological systems. We analyze the conceptual, methodological and operational aspects in using these concepts for the assessment and analysis of agricultural systems and try to identify differences and possible overlaps betw...
The authors analyze the concept of marginality from an ecological
perspective and provide examples of some mechanisms of marginalization.
Marginalization cannot solely be described as an ecological phenomenon, but
rather occurs via the interplay of ecological and social aspects of complex
arrangements. Hence the use of socio-ecological systems as a...
During 2003 and 2004 in the Adolfo López Mateos community, Tlaxcala, the agroforestry practices to rehabilitate and conserve soils were characterized, and later with farmers’ participation, identified the species of multiple purpose that best fit with these practices. The plantation of succulent and/or woody species in contour hedgerows, together w...
At the Center for Development Research (ZEF), University of Bonn, we aim to understand and support local and international efforts to improve human well-being and ecological balance. As both actors in and critics of development, we reflect about the roles of science to tackle development. In this paper the ZEF’s understanding and how-to’s are expla...
Farming is the main livelihood activity in semi-arid rural West Africa, involving the largest portion of
the population, contributing significantly to the regional economy and intimately intertwined with
current environmental problems. Key vulnerabilities of the Sudan Savanna include its ecological
fragility, institutional weakness, high levels...
Agroforestry, by combining agricultural and forestry components through specific management strategies at the plot, community, and landscape level, can satisfy multiple demands, including the provision of environmental services. Payments for environmental services (PES) have been proposed as compensation mechanisms to revert potential negative impa...
Agriculture is one of the main sources of income in developing countries and at the same time one of the major drivers causing environmental conflicts like loss of biodiversity. Agroforestry, which combines agricultural with forestry components at plot, community and landscape level, through a component-specific management can satisfy a series of m...
En la amazonía peruana y durante el segundo semestre del año 2000, evaluamos los volúmenes de carbono secuestrado por seis
sistemas agroforestales y/o sistemas de uso de la tierra: bosque primario, bosque secundario, café+sombra, silvopastura, pastura y
huerto casero (tratamientos), en tres variantes ecológicas (repeticiones): selva alta, media y b...
Currently, the environmental services concept and i ts assessment seems the most appropriate approach t o estimate, evaluate, conserve and in general make en vironmental use sustainable. The most well known environmental services are water purification and c arbon sequestration. However, there are knowledge gaps. In the case of biodiversity, for ex...
Projects
Projects (3)
Forum to share, comment, and connect with global researchers specialized in food production, forest resources, and environmental care. Crops, culture, art gallery, and more...
BiomassWeb aims at providing concepts to increase the availability of and access to food through more and higher-value biomass for food and non-food purposes. Biomass-based value webs (= interlinked value chains) are targeted and exemplary agronomic, technological and institutional innovations in production, processing (including post-harvest issues), trading and utilization of biomass-based goods are sought. BiomassWeb expects to contribute to enhancing the capacity of Africa to participate in the emerging regional and international bioeconomy. An important output will be the establishment of an internet-based platform ("BiomassNet") for experts (scientists) in Africa's biomass sector for biomass-related information sharing and activities.
