New Publication on animal traits and pathogens!

Xu, Y., Laine, [ ..] Santangeli, A., [...], Lehikoinen, A. 2024 Slow-lived birds and bats carry higher pathogen loads. One Earth, 7, 1–12.  https://doi.org/10.1016/j.oneear.2024.04.021.

In a shell: The study investigates how species traits and local climate factors identify pathogen reservoir hosts among birds and bats in Europe. Species with slower life paces, sedentary habits, and forest habitats show high pathogen prevalence, with temperature being a crucial predictor.

Summary: Wildlife and zoonotic diseases are increasingly impacting human society, the food chain, and wildlife; therefore, proactive mitigation tools for predicting large-scale risk of the relevant pathogens are urgently needed. Birds and bats are large-scale disease reservoirs and transmitters. However, holistic understanding for which bird and bat species act as reservoirs for pathogens remains understudied. Here, we test the extent to which the features related to the mobile species and local climate identify reservoir hosts for the 18 most-sampled pathogens across Europe. Species with slower pace of life (i.e., larger bodied and longer lived), sedentary species, and forest species had high pathogen prevalence. Temperature was the most important predictor for pathogen prevalence, but its effects varied in different directions. Overall, host species traits and climatic gradients robustly predicted pathogen prevalence, especially for non-vector-transmitted pathogens. We offer a data-driven basis for developing targeted interventions to mitigate impacts of zoonotic diseases, particularly in the face of climate change.

New publication on scavangers and epizootic regulations!

Donázar, J.A., Cortés-Avizanda, A., Ceballos, O., Arrondo, E., Grande, J.M., Serrano, D. 2020. Epizootics and sanitary regulations drive long-term changes in fledgling body condition of a threatened vulture. Ecological Indicators, vol. 113. https://doi.org/10.1016/j.ecolind.2020.106188

Abstract:  Epizootics and deliberate changes in policies affecting the environment may affect large groups of species and the functioning of entire ecosystems. Although these effects often overlap in time, their simultaneous effect is rarely examined despite their importance as causes of current biodiversity loss. Here, based on the monitoring of an Egyptian vulture (Neophron percnopterus) population over thirty-three years (1986–2018), we increase our knowledge about the effects of anthropogenic-induced changes in food availability, both direct (sanitary policies limiting livestock carcass disposal) and indirect (a wild rabbit epizootic), on brood size and body condition of fledglings at nests. We compared the body mass of fledglings of broods with one chick (Single) and two chicks (within which we distinguished First and Second-hatched). The mass of Second-hatched chicks decreased after the plummet in rabbit populations (in the year 1990) and the regulations limiting carcass disposal (2005), reaching minimum values during the period with lowest food availability (i.e. 2005–2013). Recent sanitary legislation allowing carcass disposal by farmers coincides with a slight recovery in the observed body masses. Overall, this study shows that environmental changes of disparate origin can have synergistic effects on individual condition. Conservation of endangered vultures will require multi-targeted conservation plans aimed at ensuring nutritional requirements, in addition to detailed long-term monitoring, in order to detect obscure/masked drivers that affect body condition of fledglings.