Keeping track of nature : interdisciplinary insights for participatory ecological monitoring

Participatory ecological monitoring aims to bring together conservationists and members of the public to collect scientific data about changes in nature – in species, habitats, ecosystems and natural resources. Given that such monitoring not only concerns measures of nature but inherently the participants doing the measuring, it is as much to do with social processes as it is to do with ecological ones. By drawing on detailed ethnographic work from the community forests of Nepal, this thesis aims to explore some of the social dimensions of participatory monitoring and of its consequences for socio-ecological regimes. Current debates in political ecology, development studies and nature-society studies provide the theoretical basis for the investigation. The novelty of the thesis lies in its extensive empirical data, which allows it to explore current understandings of participatory monitoring. The thesis establishes the following tentative theoretical findings. It firstly draws attention to the importance of the informal, often unconscious ways in which we all observe changes in nature and of the need to recognise such ‘local monitoring’ in relation to participatory monitoring. It draws attention to the situated nature of practices of monitoring and the heterogeneity of people involved, suggesting that this has consequences for how costs and benefits arising from participatory monitoring are distributed amongst participants and beyond. It argues that without attending to such consequences, participatory monitoring may serve to (re)produce social inequalities which are the basis for marginalisation and that it may become embroiled in local power struggles. The thesis argues that whilst participatory monitoring may provide useful data on changes in nature, that this information will not automatically influence decision-making over nature conservation or the use of natural resources. A multitude of other factors are important in such decision-making and the ways in which these relate to and potentially constrain the effectiveness of participatory monitoring are discussed. The thesis finally offers a typology with which to better understand the complexity amongst participatory monitoring projects – based on who and what they are for – and with which to approach the conflicts and inconsistencies they present. The thesis concludes that without a careful consideration of their inherent social dimensions, participatory monitoring projects will ultimately fail in attempts to both improve the condition of nature and the lives of societies that depend on it, for the two are intimately connected. Interdisciplinary studies such as this are therefore seen to offer great potential to participatory and community-based approaches to conservation and natural resource management more widely

Meta-analysis of the effects of predation on animal prey abundance: evidence from UK vertebrates

Background: Controlling vertebrate predators is one of the most widespread forms of wildlife management and it continues to cause conflict between stakeholders worldwide. It is important for managers and policy-makers to make decisions on this issue that are based on the best available scientific evidence. Therefore, it is first important to understand if there is indeed an impact of vertebrate predators on prey, and then to quantify this impact. Methodology/Principal Findings: Using the UK as a case study, we use a meta-analytical approach to review the available evidence to assess the effect of vertebrate predation on animal prey abundance. We find a significant effect of predators on prey abundance across our studies. On average, there is a 1.6 fold increase in prey abundance in the absence of predation. However, we show significant heterogeneity in effect sizes, and discuss how the method of predator control, whether the predator is native or non-native, and aspects of study design, may be potential causes. Conclusions/Significance: Our results allow some cautious policy recommendations to be made regarding the management of predator and prey populations. Meta-analysis is an important tool for understanding general patterns in the effect of predators on prey abundance across studies. Such an approach is especially valuable where management decisions need to be made in the absence of site-specific information

The pharmacology of effort-related choice behavior: Dopamine, depression, and individual differences

This review paper is focused upon the involvement of mesolimbic dopamine (DA) and related brain systems in effort-based processes. Interference with DA transmission affects instrumental behavior in a manner that interacts with the response requirements of the task, such that rats with impaired DA transmission show a heightened sensitivity to ratio requirements. Impaired DA transmission also affects effort-related choice behavior, which is assessed by tasks that offer a choice between a preferred reinforcer that has a high work requirement vs. less preferred reinforcer that can be obtained with minimal effort. Rats and mice with impaired DA transmission reallocate instrumental behavior away from food-reinforced tasks with high response costs, and show increased selection of low reinforcement/low cost options. Tests of effort-related choice have been developed into models of pathological symptoms of motivation that are seen in disorders such as depression and schizophrenia. These models are being employed to explore the effects of conditions associated with various psychopathologies, and to assess drugs for their potential utility as treatments for effort-related symptoms. Studies of the pharmacology of effort-based choice may contribute to the development of treatments for symptoms such as psychomotor slowing, fatigue or anergia, which are seen in depression and other disorders