Environmental refuges from disease in host-parasite interactions under global change.

Area of Science:

• Ecology
• Parasitology
• Environmental Science

Background:

• Organismal physiology is influenced by environmental context, leading to performance-response curves along gradients.
• Parasites typically adapt faster than hosts due to shorter generation times, but environmental factors can limit parasite performance.
• Thermal disease refuges are known, but other environmental factors like salinity and nutrients may also offer protection.

Purpose of the Study:

• To explore laboratory and natural examples of environmental disease refuges.
• To hypothesize how global environmental change might impact these refuges.
• To synthesize knowledge on environmental disease refuges across various gradients and systems.

Main Methods:

• Reviewing laboratory and field-based examples of host-parasite interactions along environmental gradients.
• Analyzing host and parasite performance-response curves under different environmental conditions.
• Developing hypotheses regarding the influence of global environmental change on disease refuges.

Main Results:

• Environmental conditions can create refuges where parasite performance is limited more than host performance.
• Examples of disease refuges exist along gradients of temperature, salinity, and nutrient levels.
• Global environmental change has the potential to alter the extent and effectiveness of these refuges.

Conclusions:

• Environmental disease refuges are crucial for understanding host-parasite dynamics.
• Global environmental change necessitates further research into how these refuges will be affected.
• Integrating host and parasite responses is key to predicting disease outcomes under future conditions.