What is Impact of Climate Change on Moose Populations?

Changes in Habitat and Food Supply

Climate change is altering the habitats of moose in Alaska, particularly in areas with permafrost thaw. Thawing permafrost is causing the loss of habitat and changing the distribution of vegetation, which is moose’s primary food source. For example, warmer temperatures are advancing the growth of willow and birch, but delaying the growth of the moose’s primary food source, tundra grasses. This shift in vegetation can reduce moose survival rates and reproductive success.

Disease and Parasite Prevalence

Climate change is also increasing the prevalence of disease and parasites in moose populations. Warmer temperatures are allowing ticks, which can transmit diseases like anaplasmosis and babesiosis, to survive longer and thrive. Moose are also more susceptible to parasites like liver flukes, which can cause anemia and weight loss. In Alaska, studies have shown that moose with high parasite loads have lower body condition scores and are more likely to die.

Conservation Implications

Understanding the impacts of climate change on moose populations is crucial for developing effective conservation strategies. To mitigate these effects, conservation efforts should focus on maintaining and restoring habitat quality, managing disease and parasite prevalence, and promoting adaptability in moose populations. For example, creating corridors for moose migration and maintaining connectivity between habitats can help moose adapt to changing environmental conditions. Additionally, monitoring moose populations and tracking changes in their behavior and ecology can inform conservation decisions and help managers develop targeted strategies to support moose resilience.