Publications by authors named "G TREU"

Marine and freshwater mammalian predators and fish samples, retrieved from environmental specimen banks (ESBs), natural history museum (NHMs) and other scientific collections, were analysed by LIFE APEX partners for a wide range of legacy and emerging contaminants (2545 in total). Network analysis was used to visualize the chemical occurrence data and reveal the predominant chemical mixtures for the freshwater and marine environments. For this purpose, a web tool was created to explore these chemical mixtures in predator-prey pairs.

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Article Synopsis
  • Second-generation anticoagulant rodenticides (SGARs) are widely used for rodent control, but they pose risks of secondary poisoning to predators, particularly birds of prey in the UK.
  • Regulatory changes in the 2010s allowed for the outdoor use of certain highly toxic SGARs, specifically brodifacoum, which may have affected predator exposure levels.
  • Analysis of Common Buzzards from 2001 to 2019 showed a decrease in difenacoum exposure, while brodifacoum levels increased significantly post-2016, indicating a potential shift in SGAR use with concerning implications for wildlife health.
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Trace elements are chemical contaminants spread in the environment by anthropogenic activities and threaten wildlife and human health. Many studies have investigated this contamination in apex raptors as sentinel birds. However, there is limited data for long-term biomonitoring of multiple trace elements in raptors.

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Apex predators are good indicators of environmental pollution since they are relatively long-lived and their high trophic position and spatiotemporal exposure to chemicals provides insights into the persistent, bioaccumulative and toxic (PBT) properties of chemicals. Although monitoring data from apex predators can considerably support chemicals' management, there is a lack of pan-European studies, and longer-term monitoring of chemicals in organisms from higher trophic levels. The present study investigated the occurrence of contaminants of emerging concern (CECs) in 67 freshwater, marine and terrestrial apex predators and in freshwater and marine prey, gathered from four European countries.

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