Climate-driven marmot-plague dynamics in Mongolia and China.

Area of Science:

• Zoonotic disease ecology
• Environmental science
• Epidemiology

Background:

• Plague incidence is increasing globally, linked to climate change and globalization.
• Local climate significantly impacts plague dynamics in rodent populations.
• Marmots are key hosts for plague in Central Asia.

Purpose of the Study:

• To investigate the relationship between marmot plague and climate factors in Mongolia and China.
• To analyze density-dependent and geographic-dependent effects on plague risk.
• To understand the influence of climate and landscape diversity on plague dynamics.

Main Methods:

• Analysis of an 18-year plague database (1998-2015).
• Statistical modeling of plague incidence against climate variables (precipitation, temperature).
• Comparison of plague dynamics between the Qinghai-Tibet Plateau (QTP) and non-QTP regions.

Main Results:

• Precipitation showed a density-dependent effect on marmot plague risk.
• Temperature effects on plague varied geographically, with distinct patterns on the QTP.
• Climate and landscape heterogeneity explained geographical differences in temperature's influence.

Conclusions:

• Marmot plague dynamics are complex, influenced by both host density and climatic conditions.
• Geographic location and associated environmental factors critically modulate climate-plague relationships.
• Understanding these interactions is crucial for predicting and managing plague outbreaks.