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Fluctuating temperatures have a surprising effect on disease transmission
1Lancaster Environment Centre, Lancaster University, Lancaster, United Kingdom.
Plos Biology
|September 13, 2023
Summary
Temperature fluctuations unexpectedly boosted parasite transmission, contradicting theories predicting reduced performance. This finding raises concerns about infectious disease dynamics under climate change.
Area of Science:
- Ecology
- Parasitology
- Climate Change Biology
Background:
- Organismal performance is often theorized to decrease with temperature fluctuations around the thermal optimum.
- Understanding how environmental variability affects host-parasite interactions is crucial for predicting disease spread.
Purpose of the Study:
- To investigate the impact of temperature fluctuations on parasite transmission rates.
- To challenge existing ecological theories regarding performance under variable thermal conditions.
Main Methods:
- Experimental manipulation of temperature regimes to simulate fluctuations.
- Quantification of parasite transmission success under different thermal scenarios.
Main Results:
- Contrary to theoretical predictions, temperature fluctuations significantly increased parasite transmission.
- Observed effects suggest complex, non-linear responses of host-parasite systems to thermal variability.
Conclusions:
- Current ecological models may underestimate the impact of climate change on infectious disease dynamics.
- Further research is needed to elucidate the mechanisms driving increased transmission under fluctuating temperatures.
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