The dataset is a spreadsheet containing detailed review of published scientific articles that report both ecosystem service and human wellbeing outcomes from agricultural intensification. Of the 255 articles initially identified, 42 met all four of the above four criteria. We then conducted two targeted searches, reaching a point of diminishing returns at which we were satisfied we had captured much of the core literature. For each case, we used a pre-determined scoring code to independently assess information on: a) publication year, b) methodological approach and timescale considered, c) geographic region of the case study, d) site characteristics, e) type and definition of intensification process, f) agricultural product(s) in focus, g) factors enabling and/or constraining the intensification, h) primary intensification actors, i) other drivers of ecosystem service and wellbeing change that were addressed, j) impacts on ecosystem services, and k) impacts on wellbeing. Impacts on ecosystem services were disaggregated with primary subcomponents of provisioning services (which we divided into food and non-food), regulating services and cultural services, as well as biodiversity and supporting services.Agricultural intensification refers to interventions to increase the outputs per hectare of crops or livestock. Whilst intensification can occur through local demand for innovation, it is increasingly imposed through policy interventions in forest-agriculture frontiers. 'Sustainable intensification' and 'land sparing' are examples of popular policy narratives that respond to concerns over future food security and planetary boundaries. Agricultural intensification also features in global development goals and strategies, such as the Sustainable Development Goals and efforts to accelerate a Green Revolution for Africa. Some of the most rapid change is taking place in forest-agriculture frontier, often characterized by mosaic landscapes in transition from subsistence to cash-cropping economics, from longer to shorter fallows, and from lower to higher levels of purchased inputs. These rapidly changing social-ecological systems are also places where poverty alleviation and environmental conservation are priority objectives. However, previous reviews of such transitional landscapes finds that intensification generates more income but also leads to negative outcomes including loss of human and social capital, deforestation, and biodiversity loss (van Vliet et al. 2012). At present we know very little about the trends and patterns of such outcomes, the contexts in which they take shape, or how to improve policy. This knowledge gap about sustainable agriculture and landscapes is well suited to being addressed through an ESPA synthesis, firstly because concerns for sustainable agriculture have been central to the ESPA empirical portfolio (Mace 2014) and secondly because ESPA conceptual approaches provide insightful ways to interrogate the wider body of empirical cases. Thus we draw on ESPA studies but also draw on ESPA framings of ecosystem services, human wellbeing and trade-offs to guide our synthesis of the wider empirical evidence. We propose to synthesise an interdisciplinary body of refereed and grey literatures, primarily through a narrative synthesis approach, with potential to also use statistical meta-analysis or Qualitative Comparative Analysis as a secondary approach. The synthesis will ask how agricultural intensification shapes the changing trade-offs between land use, ecosystem services and poverty alleviation. One particularly novel point of departure is the emerging findings about how land use change, and in particular agricultural intensification, changes how ecosystems are valued by different stakeholders, such that ecosystem services valued under traditional agricultural systems may become less valued (or even become perceived as disservices) under intensified and commodified systems. We propose to work with an interdisciplinary working group of experts with strong engagement with key policymakers and practitioners in organisations working on agriculture, conservation and development. Engagement will ultimately lead to knowledge exchange activities that are intended to bring about uptake of research findings and benefits to the wellbeing of the poor. We propose to do this through co-produced knowledge products (including a policy brief and a short film), workshops, dissemination at global events and interaction with global science-policy platforms such as IPBES. Regarding the latter activity, the project working group has partly been selected for a wide spread of contributions to these platforms and therefore direct opportunities to be part of wider processes of communicating science to policy.

Literature review. We adopted a pragmatic sampling strategy, combining different targeted searches, to secure a sufficient and robust set of the core peer-reviewed literature. The searches took place in January and February 2017 using Web of Science and combining terms associated with 1) agricultural land use intensification, 2) ecosystem services, and 3) wellbeing.