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Some like it hotter: trematode transmission under changing temperature conditions
Christian Selbach1,2, Robert Poulin3
1Department of Zoology, University of Otago, Dunedin, New Zealand. christian.selbach@bios.au.dk.
Oecologia
|November 10, 2020
Summary
Rising temperatures boost parasite transmission, but impacts vary by species. Understanding these species-specific traits is crucial for predicting ecosystem disease dynamics in a changing climate.
Area of Science:
- Ecology
- Parasitology
- Climate Change Biology
Background:
- Climate change is increasing global temperatures, altering organism interactions and parasite infection dynamics.
- Predicting how rising temperatures affect sympatric parasite species is challenging due to limited knowledge of interspecific transmission potential variations.
Purpose of the Study:
- To analyze transmission patterns of four trematode species infecting the New Zealand mudsnail under current and future temperature scenarios.
- To quantify the net effect of temperature on parasite transmission potential by examining cercarial productivity, movement, and survival.
Main Methods:
- Comparative experimental study using two temperature scenarios (current and future warmer).
- Investigated temperature effects on cercariae (parasite transmission stages) of four trematode species.
- Analyzed species-specific host-searching behavior, productivity, activity, and longevity.
Main Results:
- Increased temperatures positively influenced cercarial transmission dynamics for all studied trematode species.
- Temperature impacts on transmission varied significantly among trematode species, linked to their host-searching behaviors.
- Species-specific differences in transmission abilities, productivity, activity, and longevity were observed.
Conclusions:
- Temperature-driven shifts in species-specific transmission abilities can alter parasite community structure in ecosystems.
- Understanding these traits is fundamental for predicting parasite dynamics and disease impacts under climate change.
- Parasite communities play a key role in regulating ecological functions and disease emergence.
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