Emily Fitzherbert’s research while affiliated with University of Oxford and other places

African lions are a significant threat to pastoralists, triggering both retaliatory and nonretaliatory killings that represent a high-profile example of human–wildlife conflict. In the present article, we report on a grassroots campaign to reduce such conflict by shifting agropastoralists’ attitudes toward lion killing and the central role of bylaws in its apparent success. Insofar as all of East Africa's principal protected areas still harboring lions are surrounded by pastoralist populations, the vast majority of which persecute lions, this novel strategy is of considerable wide-scale and practical significance. We report on an estimated 59%–69% reduction in the number of lions killed since the implementation of bylaws and use our experiences to highlight the need for fresh dialog among project managers, conservation organizations, and their funders in crafting appropriate conservation success metrics. In the context of human–wildlife conflict, changes in peoples’ norms and attitudes are of greater significance over the long term than simplistic tabulations of the number of individuals saved.

Internal or within-state migration is common in Africa and elsewhere and has environmental and social consequences that are often poorly understood. We conducted a national-scale study tracking the movements of agropastoralists in Tanzania and documented the extent of associated environmental changes. The data were drawn from interviews with government officials in 80 rural districts covering the majority of land area across the country. According to interviewees, recent settlement is associated with forest clearing, overgrazing, and landscape burning. Conflicts such as lion killing and forced evictions of settlers often occur. Our interview data uncover limited capacity and lack of coordination among different levels of government to deal with these challenges. The novelty of our study is in its ability to draw on reports from ground-level administrators and to aggregate this information in order to both describe the impacts of rural migration over a large area and inform appropriate policy action from national-level decision-makers.

1. In dryland ecosystems, mobility is essential for both wildlife and people to access unpredictable and spatially heterogeneous resources, particularly in the face of climate change. Fences can prevent connectivity vital for this mobility. 2. There are recent calls for large-scale barrier fencing interventions to address human–wildlife conflict and illegal resource extraction. Fencing has costs and benefits to people and wildlife. However, the evidence available for facilitating sound decision-making for fencing initiatives is limited, particularly for drylands. 3. We identify six research areas that are key to informing evaluations of fencing initiatives: economics, edge permeability, reserve design, connectivity, ecosystem services and communities. 4. Policy implications. Implementing this research agenda to evaluate fencing interventions in dryland ecosystems will enable better management and policy decisions. The United Nations Conventions on Migratory Species (CMS) and to Combat Desertification (UNCCD) are appropriate international agreements for moving this agenda forward and leading the development of policies and guidelines on fencing in drylands.

Significance Protected public lands are insufficient to halt the loss of global biodiversity. However, most commercial landowners need incentives to engage in conservation. Through an interdisciplinary study examining palm-oil plantations in Sumatra, we demonstrate that ( i ) joint consideration of both biodiversity and economic relationships permits the spatial targeting of areas that enhance conservation of International Union for Conservation of Nature Red Listed species at relatively low cost to the landowner and ( ii ) the potential exists for funding such private costs of conservation through a price premium on a conservation-certified good. Such an approach avoids the need to assume intervention from an international social planner, while establishing the potential for profitable conservation on private lands, providing an important additional route for sustaining endangered species.

Packer et al. reported that fenced lion populations attain densities closer to carrying capacity than unfenced populations. However, fenced populations are often maintained above carrying capacity, and most are small. Many more lions are conserved per dollar invested in unfenced ecosystems, which avoid the ecological and economic costs of fencing.

Studies that examine how helping behavior varies among individuals shed light on both the extent and the variation of human cooperative tendencies and the potential fragility of genealogical kinship in structuring prosociality. Here we explore the importance of both reciprocal altruism and kin selection in structuring cooperation in a contem- porary African village context (Mpimbwe, Tanzania), where ethnographic observations suggest that traditional pat- terns of cooperation are becoming deeply eroded. Our analysis of the various ways in which people assist each other reveals that levels of helping are low. Reciprocal altruism is the principal explanation for helping, and genealogical kinship is important with respect to directing unilateral aid to needy individuals. However, more nuanced analyses, in conjunction with ethnographic evidence of threats of supernatural sanctions on uncooperative kin, expose the fragility of biological kinship in structuring cooperation in Mpimbwe and a further preference for affinal relatives. Furthermore, the finding that wealthier individuals are less engaged in reciprocal dyads than are poorer individuals suggests that in developing rural communities cooperative networks weaken most readily among the wealthy. More generally, we demonstrate how entry into a market economy and increasing wealth inequalities have the potential both to change the way individuals manage risk and to alter their relationships with kin.

Increasing demand for cooking oil and biofuels has made palm oil, > 80% of which is grown in South-east Asia, the dominant globally traded vegetable oil. However, this region is host to some of the world’s most biodiverse and threatened tropical forests. Strategic engagement with commercial operations is increasingly recognized to be an essential part of the solution for raising funds for conservation initiatives, raising consumer consciousness and potentially stemming environmental degradation. Linking market incentives towards conservation is also of critical importance because it is becoming widely recognized that conservation needs to begin to address the wider countryside (outside protected areas) where human–wildlife interactions are frequent and impacts are large. Using the Sumatran tiger Panthera tigris sumatrae as both a threatened species in its own right and emblematic for wider species diversity, we show that western consumers are willing to pay a significant premium for products using palm oil grown in a manner that reduces impacts on such species. Results suggest that the price premium associated with a ‘tiger-friendly’ accreditation may provide a useful additional tool to raise conservation funds and, within the right institutional context, serve as an inducement to address the problem of habitat and species loss.