Road exposure and the detectability of birds in field surveys

Road ecology, the study of the impacts of roads and their traffic on wildlife, including birds, is a rapidly growing field, with research showing effects on local avian population densities up to several kilometres from a road. However, in most studies, the effects of roads on the detectability of birds by surveyors are not accounted for. This could be a significant source of error in estimates of the impacts of roads on birds and could also affect other studies of bird populations. Using road density, traffic volume and bird count data from across Great Britain, we assess the relationships between roads and detectability of a range of bird species. Of 51 species analysed, the detectability of 36 was significantly associated with road exposure, in most cases inversely. Across the range of road exposure recorded for each species, the mean positive change in detectability was 52% and the mean negative change was 36%, with the strongest negative associations found in smaller-bodied species and those for which aural cues are more important in detection. These associations between road exposure and detectability could be caused by a reduction in surveyors’ abilities to hear birds or by changes in birds’ behaviour, making them harder or easier to detect. We suggest that future studies of the impacts of roads on populations of birds or other taxa, and other studies using survey data from road-exposed areas, should account for the potential impacts of roads on detectability.The BBS is jointly funded by the BTO, JNCC and RSPB. Stuart Newson is supported by the BTO’s Young Scientists’ Programme. Sophia C. Cooke is funded by the Natural Environment Research Council

How Does Citizen Science "Do" Governance? Reflections from the DITOs Project

Citizen science (CS) is increasingly becoming a focal point for public policy to provide data for decision-making and to widen access to science. Yet beyond these two understandings, CS engages with political processes in a number of other ways. To develop a more nuanced understanding of governance in relation to CS, this paper brings together theoretical analysis by social science researchers and reflections from CS practice. It draws on concepts from Science and Technology Studies and political sciences as well as examples from the "Doing-It-Together Science" (DITOs) project. The paper develops a heuristic of how CS feeds into, is affected by, forms part of, and exercises governance. These four governance modes are (1) Source of information for policy-making, (2) object of research policy, (3) policy instrument, and (4) socio-technical governance. Our analysis suggests that these four dimensions represent different conceptions of how science and technology governance takes place that have not yet been articulated in the CS literature. By reflecting on the DITOs project, the paper shows how this heuristic can enrich CS. Benefits include project organisers better communicating their work and impacts. In its conclusion, the paper argues that focusing on the complexity of governance relations opens up new ways of doing CS regarding engagement methodologies and evaluation. The paper recommends foregrounding the broad range of governance impacts of CS and reflecting on them in cooperation between researchers and practitioners

Lessons from the removal of lead from gasoline for controlling other environmental pollutants: A case study from New Zealand

<p>Abstract</p> <p>Background</p> <p>It took over two decades to achieve the removal of leaded gasoline in this country. This was despite international evidence and original research conducted in New Zealand on the harm to child cognitive function and behaviour from lead exposure.</p> <p>Objective</p> <p>To identify lessons from the New Zealand experience of removing leaded gasoline that are potentially relevant to the control of other environmental pollutants.</p> <p>Discussion</p> <p>From the available documentation, we suggest a number of reasons for the slow policy response to the leaded gasoline hazard. These include: (1) industry power in the form of successful lobbying by the lead additive supplier, Associated Octel; (2) the absence of the precautionary principle as part of risk management policy; and (3) weak policymaking machinery that included: (a) the poor use of health research evidence (from both NZ and internationally), as well as limited use of expertise in academic and non-governmental organisations; (b) lack of personnel competent in addressing technically complex issues; and (c) diffusion of responsibility among government agencies.</p> <p>Conclusion</p> <p>There is a need for a stronger precautionary approach by policymakers when considering environmental pollutants. Politicians, officials and health workers need to strengthen policymaking processes and effectively counter the industry tactics used to delay regulatory responses.</p

Traffic Noise and Light May Affect Wildlife Use of Highway Crossing Structures [Policy Brief]

Project Name: Wildlife-Crossing Mitigation Effectiveness with Traffic Noise and LightRoads and highways act as barriers to wildlife. They disrupt movement of wildlife populations and connectivity between communities of interacting species. Transportation organizations and many wildlife agencies see highway crossing structures for wildlife as critical to mitigating highway barrier effects. These structures are optimistically assumed to be effective for most species, most of the time, but are seldom critically investigated