Contaminated consignment simulation to support risk-based inspection design

Invasive nonnative plant pests can cause extensive environmental and economic damage and are very difficult to eradicate once established. Phytosanitary inspections that aim to prevent biological invasions by limiting movement of nonnative plant pests across borders are a critical component of the biosecurity continuum. Inspections can also provide valuable information about when and where plant pests are crossing national boundaries. However, only a limited portion of the massive volume of goods imported daily can be inspected, necessitating a highly targeted, risk-based strategy. Furthermore, since inspections must prioritize detection and efficiency, their outcomes generally cannot be used to make inferences about risk for cargo pathways as a whole. Phytosanitary agencies need better tools for quantifying pests going undetected and designing risk-based inspection strategies appropriate for changing operational conditions. In this research, we present PoPS (Pest or Pathogen Spread) Border, an open-source consignment inspection simulator for measuring inspection outcomes under various cargo contamination scenarios to support recommendations for inspection protocols and estimate pest slippage rates. We used the tool to estimate contamination rates of historical interception data, quantify tradeoffs in effectiveness and workload for inspection strategies, and identify vulnerabilities in sampling protocols as changes in cargo configurations and contamination occur. These use cases demonstrate how this simulation approach permits testing inspection strategies and measuring quantities that would otherwise be impossible in a field-based setting. This work represents the first steps toward a decision support tool for creating dynamic inspection protocols that respond to changes in available resources, workload, and commerce trends.     

Multiscale drivers of amphibian community occupancy in urban ponds

Urban Ecosystems - Urbanization has driven the loss of natural aquatic habitats while concurrently increasing the abundance of artificial urban ponds. Urban ponds are not typically designed for...     

A qualitative exploration of parenting representations amongst mothers with young children on the edge of care

Mothers who are at risk of losing custody of their children represent a vulnerable population whose voices are seldom heard. Exploring their perspectives of parenting, their child and the relationship with their child—their ‘parenting representations’—can improve our understanding of their struggles and inform interventions. Research in this area so far has been predominantly quantitative, meaning valuable information about subjective experiences is often lost. The present study sought to address this gap by thematically analysing interviews with eight mothers with under-3-year-olds on the edge of Local Authority care, completed at the beginning of a therapeutic intervention. Results are reported around five themes: ‘Idealistic portrayal of the child and the relationship’, ‘Struggling as a parent’, ‘Shadows of the past’, ‘The child and motherhood as comfort’ and ‘Anxiety about loss and fighting for the child’. The parenting struggles of mothers in this population are complex and multi-faceted, fuelled by unresolved relational trauma, fears of further pain, adversity and difficulties in accessing and trusting support. Successful interventions are likely to require comprehensive, long-term approaches that holistically address mothers' unmet physical and emotional needs and begin with building relational trust.