This dataset integrates data from qualitative and quantitative participatory methods, along with remote sensing data to map changes in ecosystem services. This approach enabled us to develop a holistic understanding of what ecosystem services are available in the landscape, where they are located, how they are valued by local communities, and how and why they are changing. Participatory mapping with groups of participants from communities in our focal area created fine-scale data that allowed us to understand both ecosystem services supplied by very specific locations (i.e., provisioning and cultural ecosystem services from a specific tree or bend in the river) as well as the capacity and value of a range of ecosystem services(ES) from particular land cover types. The integration of TEK with remote sensing data was critical for scaling this information up to the landscape level. Additionally, the use of historic satellite imagery allowed us to investigate long-term change in provisioning ES and triangulate this with perceived changes identified by the communities. In this geographic context, such mixed methods were also important given the lack of other ecosystem service studies. In a politically sensitive region, the co-production of knowledge with the community allowed us to build trust with the community whilst ensuring their perspectives were integrated with equal weight to the remote sensing data, and resulting in a deeper understanding of both datasets and the ES dynamics of the region.Rapid changes in the natural, social, and economic environment are occurring in Ethiopia's Lower Omo Valley, as part of a state-led development vision of repositioning the region as a major sugar exporter. At the same time, these changes raise risks of environmental degradation, and the emergence of new kinds of inequality and conflict. The Lower Omo is home to a large number of pastoralist groups, and is a major centre of ethnic, linguistic and cultural diversity - reflected in its designation as a UNESCO World Heritage Site (Schlee, 2009; Turton, 1991). While new sugar estates promise to create 150,000 new jobs, they are also drawing labour migrants from other regions, setting up new hierarchies of wealth and opportunity, and raising social tensions (Tewolde and Fana, 2014). As part of its ambitious Growth and Transformation Plans (FDRE 2010, 2015), Ethiopia's government has allocated 175,000 hectares to the sugarcane project (more than the entire area under irrigation in Kenya), and aims to increase national sugar production from 17 million to 42 million tons. Pastoralists who, according to the government, do not use the land optimally, have had their "underutilized" lands re-purposed for sugarcane plantations and industrial sites that will produce sugar worth 661.7 million USD and produce alternative energy sources (304,000m3 of ethanol per year and 607 MW electricity). This scenario raises urgent questions about the social justice dimensions of current development models, and their implications for socio-ecological resilience. The following interlinked research questions will structure our exploration of the on-going changes and their consequences: 1. How have recent developments affected the spatial and temporal availability of and access to natural resources in the region? (Environmental sustainability / degradation) 2. How are changing resources affecting conflict dynamics in the region? (Conflict and resilience) 3. How are these changes influencing relations of material in/equality? (Wealth and poverty / resource security). These questions will be addressed by three working groups with expertise in the fields of environmental sustainability, conflict studies, and poverty research respectively. The group will first conduct research involving knowledge generation across disciplines and stakeholder groups, and second work towards application in the form of knowledge exchange and synthesis. The first step in the research design will accommodate a cycle of stakeholder identification, scoping and testing of research assumptions; followed by an intensive period of data collection using both conventional (survey, focus group) and participatory research methods. Crucially, our tools will include participatory video methods that will be used to stimulate conversations about current models of development that are rarely possible due to barriers of language, distance, and power. The project will thereby facilitate knowledge sharing, processing, and utilisation, and explore how knowledge regarding the environmental changes and their implications for poverty, peace, and security is best integrated in decision-making for diverse stakeholders.

Participatory Mapping. In order to understand how environmental change has affected ES from the local perspective, and what these changes have meant for livelihoods, we carried out qualitative participatory mapping activities and focus group discussions in three communities (each a kebele, the smallest administrative unit of Ethiopia) in July 2018: Kopriay - historically more reliant on pastoralism with larger cattle herds, N=1,094, 217 households; Ayepa - historically more reliant on flood-retreat agriculture, N=1,275, 241 households; Napasmuria – largely poor households who have been subject to the wider regional conflict, generally resulting in their loss of animals and resettlement in a more urban context, and higher dependency on state resources such as safety net programs N=2,110, 418 households (Livestock Department, 2010).