His research focuses on forest landscape management, the effects of land-use change on ecosystem processes, and the assessment of impacts and of adaptation to climate change. Much of his work concentrates on Africa, and he has served on numerous committees related to climate change on that continent. He is also a member of the United Nation’s Framework Convention on Climate Change Least Developed Countries Expert Group and of the Intergovernmental Panel on Climate Change’s (IPCC’s) Task Group on Climate Impacts Assessments.