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Continuous Hydrologic and Water Quality Monitoring of Vernal Ponds
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AMPHIBIAN PARASITES EXHIBIT IDIOSYNCRATIC RELATIONSHIPS WITH SPATIOTEMPORAL ENVIRONMENTAL AND HOST-COMMUNITY
The Journal of Parasitology
|May 22, 2025
Summary
Parasite infection risk in frogs varies uniquely with local environmental factors and host communities. Understanding these complex relationships requires considering space, time, and species interactions for accurate ecological and evolutionary parasitology.
Area of Science:
- Ecology and Evolutionary Parasitology
- Amphibian Disease Ecology
- Parasite Life Cycle Dynamics
Background:
- Parasite distribution is influenced by host encounter and compatibility, which vary spatially and temporally.
- Abiotic and biotic environmental factors can directly impact parasites or influence transmission dynamics.
- Complex-life cycle parasites, with multiple hosts, are hypothesized to be particularly sensitive to environmental changes.
Purpose of the Study:
- To model infection probability of endohelminths in wood frogs and northern leopard frogs.
- To investigate the relationships between parasite infection and wetland characteristics, landscape composition, and local amphibian communities.
- To assess the influence of spatiotemporal environmental variation on parasite distributions.
Main Methods:
- Statistical modeling of endohelminth infection probabilities in two frog species.
- Inclusion of wetland characteristics, landscape composition, and amphibian community data in models.
- Analysis of parasites with complex and direct life cycles, including trematodes and nematodes.
Main Results:
- Parasite distributions showed correlations with some environmental factors, but few general trends were observed.
- Each parasite species exhibited unique relationships with environmental variables, leading to low predictability for most.
- The number of nearby wetlands and the local amphibian community composition significantly affected infection probabilities, supporting a dilution effect.
Conclusions:
- Parasite prevalence is highly specific to individual parasite species and their interactions with the environment and host community.
- Landscape features, such as wetland density, and host community structure play crucial roles in modulating parasite transmission.
- Accurate assessment of parasite prevalence necessitates spatiotemporal sampling and consideration of environmental and host-community variability.
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