Christian Bunn

Christian Bunn
International Center for Tropical Agriculture (CIAT) · Data and Policy Analysis Research Area (DAPA)

Dr.rer.agr.

About

24
Publications
33,109
Reads
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1,179
Citations
Citations since 2016
12 Research Items
1135 Citations
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2016201720182019202020212022050100150200250
2016201720182019202020212022050100150200250
Additional affiliations
August 2011 - September 2015
Humboldt-Universität zu Berlin
Position
  • PhD Student

Publications

Publications (24)
Article
Full-text available
Cultivation of Coffea arabica is highly sensitive to and has been shown to be negatively impacted by progressive climatic changes. Previous research contributed little to support forward-looking adaptation. Agro-ecological zoning is a common tool to identify homolo-gous environments and prioritize research. We demonstrate here a pragmatic approach...
Thesis
Full-text available
To model the impacts of climate change on global coffee production in an integrated modeling framework was the objective of this thesis. The majority of coffee is produced using either one of two species which form a single market: the heat sensitive Coffea arabica (Arabica) and the cold sensitive Coffea canephora (Robusta). Recently, evidence is i...
Article
Full-text available
Coffee has proven to be highly sensitive to climate change. Because coffee plantations have a lifespan of about thirty years, the likely effects of future climates are already a concern. Forward-looking research on adaptation is therefore in high demand across the entire supply chain. In this paper we seek to project current and future climate suit...
Article
Full-text available
Coffee is a major global commodity whose production is sustained by and provides livelihoods for millions of smallholder families in the tropics. However, it is highly sensitive to climate change and the climate risk family farmer's face from direct impacts on coffee production are often compounded by further impacts on the physical and social land...
Article
Full-text available
Coffee is a major commodity crop that shapes large shares of tropical landscapes. However, the sustainability of these landscapes is threatened by climate change. Whilst adopting climate-smart (CS) practices clearly offers direct benefits to local farmers, their greater benefits at landscape and global scales has not been studied for specific commo...
Article
Full-text available
Social cohesion plays a key role in processes of peacebuilding and sustainable development. Fostering social cohesion might present a potential to enhance the connection of natural resource management and peacebuilding and better functioning of sustainable land use systems. This contribution explores the nexus between social cohesion, natural resou...
Article
Full-text available
In Latin America, the cultivation of Arabica coffee (Coffea arabica) plays a critical role in rural livelihoods, biodiversity conservation, and sustainable development. Over the last 20 years, coffee farms and landscapes across the region have undergone rapid and profound biophysical changes in response to low coffee prices, changing climatic condi...
Article
Full-text available
Climate change is threatening cocoa production in West Africa and guidance towards site-specific adaptation is required. We developed recommendation domains with common degree of impact requiring incremental, systemic or incremental adaptation effort to provide decision support for interventions to scale out adaptive practices. We used Random Fores...
Chapter
Smallholder farmers around the globe are facing unstable productivity due to changing climate and weather patterns. The ways in which the private sector supports these farmers to build resilience to and/or engage in efforts to mitigate climate change can have significant impact on farmer livelihoods, security of supply of smallholder crops, and the...
Article
Full-text available
Climate-smart agriculture (CSA) is widely promoted as an approach for reorienting agricultural development under the realities of climate change. Prioritising research-for-development activities is crucial, given the need to utilise scarce resources as effectively as possible. However, no framework exists for assessing and comparing different CSA r...
Article
Full-text available
The production of tropical agricultural commodities, such as cocoa (Theobroma cacao) and coffee (Coffea spp.), the countries and communities engaged in it, and the industries dependent on these commodities, are vulnerable to climate change. This is especially so where a large percentage of the global supply is grown in a single geographical region....
Article
Full-text available
The West African cocoa belt, reaching from Sierra Leone to southern Cameroon, is the origin of about 70% of the world's cocoa (Theobroma cacao), which in turn is the basis of the livelihoods of about two million farmers. We analyze cocoa's vulnerability to climate change in the West African cocoa belt, based on climate projections for the 2050s of...
Technical Report
Full-text available
Liberia is one of the world’s poorest countries. Efforts to rebuild its economy after several years of internal conflict were partially set back by the 2014-5 Ebola crisis. The country’s lowland humid climate and land-use history suggest a potential to increase the production of cocoa (Theobroma cacao) and coffee (Coffea spp.) to generate income an...
Article
Previous research has shown that the produc-tion of Arabica coffee (Coffea arabica), the main source of high-quality coffee, will be severely affected by climate change. Since large numbers of smallholder farmers in tropical mountain regions depend on this crop as their main source of income, the repercussions on farmer livelihoods could be substan...
Article
Full-text available
This article in the September 2015 issue of National Geographic Magazine looked at how coffee rust impacted the 2012 to 2013 coffee growing season in Central America, and the expected climate change impacts by 2050.
Article
Regional studies have shown that climate change will affect climatic suitability for Arabica coffee (Coffea arabica) within current regions of production. Increases in temperature and changes in precipitation patterns will decrease yield, reduce quality and increase pest and disease pressure. This is the first global study on the impact of climate...
Conference Paper
Full-text available
To date, knowledge on the physical distribution of global coffee production is limited. Publicly available datasets of coffee production are incomplete or of limited value to coffee research. Spatially explicit data on the physical distribution of coffee production would help to understand and design policies that address challenges to the industry...
Conference Paper
Full-text available
Brazil is the world’s largest producer of Arabica coffee. Adverse climatic events in its major production regions have global repercussions through market effects. Climate change impacts on the Brazilian coffee production are thus of high interest to understand long term trends on global coffee markets. Nevertheless, this aspect has not been looked...
Conference Paper
Full-text available
While the debate on crop impact modeling often focusses on advancing sophisticated process models for the key staple crops, less researched crops like coffee arguably lack the scientific base to follow this approach. Nevertheless, coffee is of undeniable importance in many tropical regions and likely to be deeply impacted by climatic changes. We ex...
Conference Paper
Full-text available
Here we present a spatially explicit integrated climate change impact assessment of the coffee sector using the global recursive dynamic partial equilibrium model of crop, livestock and forestry production GLOBIOM. We define two production systems for green coffee, labeled Arabica and Robusta, employing the agro-ecological niche model Maxent. Using...
Article
Full-text available
Small farmers who supply the city of Bogotá with food are facing many challenges that are jeopardizing their livelihoods and by extension, the food security of Colombia’s capital. We expect future changes in climatic conditions to exacerbate the plight of the small farmers and this is expected to compromise Bogota’s food security even further. This...

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Projects

Projects (2)
Project
Clima-LoCa addresses important challenges related to the resilience, competitiveness and inclusiveness of the growing cocoa sectors of Colombia, Ecuador and Peru. Here, resilience refers to the capacity of smallholder producers, and other value chain actors, to mitigate the negative impacts of new EU food safety regulation on cadmium in cocoa; and of climate change. More specifically, the objective of the Action is to support the development, implementation and scaling of low cadmium and climate-relevant innovations that fit the diverse contexts of smallholder cocoa production.
Project
One of the challenges facing Climate Smart Agriculture (CSA) is scale. There are many pilots of CSA practices that are effective locally but lack mechanisms allowing ready replication in other contexts. These pilots therefore remain limited in scope, unable to reach the millions of smallholders that need to adopt CSA practices to remain viable in the face of a changing climate. This impacts not only smallholder livelihoods but also the viability of global supply chains that provide consumers with chocolate and coffee. To confront this challenge, CCAFS is supporting a project that leverages existing smallholder value chain interventions to translate climate science into actionable strategies for farmers and supporting actors, including agricultural businesses, voluntary certification schemes, and investors, across a number of geographies using smallholder coffee and cocoa systems in Africa and Latin America as model cases. This novel combination adds value to existing work with the goal of achieving adoption at scale for locally relevant CSA practices.