Reindeer Numbers May Decline Drastically by End of the Century

Reindeer herds across the Arctic face a bleak future, with significant population decreases expected due to climate change. Experts warn that the situation is particularly dire for herds in North America.

Despite having weathered previous warming periods, reindeer have seen their numbers drop by nearly 66% globally over the past thirty years, according to a study led by scholars from the University of Adelaide in Australia and the University of Copenhagen in Denmark.

Current global numbers suggest approximately nine million reindeer exist today, a figure that includes both wild and domesticated animals. However, the caribou, as they are known in North America, show the highest vulnerability, with about 3.5 million in Alaska and Canada.

The research posits an 80% decline in caribou populations by the year 2100 unless there is significant reduction in greenhouse gas emissions and increased efforts in wildlife conservation, according to Damien Fordham, a key researcher and deputy director at the University of Adelaide's Environment Institute.

Historical Data Guided the Predictions

Examining how reindeer populations have previously reacted to climate shifts, researchers used fossil records, ancient DNA sequences, and advanced computer simulations to chart reindeer population changes over the past 21,000 years. This historical data provided a baseline to compare against future scenarios.

Their findings revealed a clear pattern of population decline during periods of swift climate warming. Yet, the projections suggest that the anticipated impacts of future climate change will surpass these historical declines.

Broader Ecological Impact

Declining reindeer numbers could lead to broader ecological disruptions. These animals play a crucial role in maintaining plant diversity in the tundra ecosystems. A decrease in this diversity would not only impact plant life but could also diminish the carbon stored in Arctic soils.

Eric Post, a professor and contributor to the study from the University of California Davis, emphasized that reduced carbon storage may further accelerate global warming by releasing soil carbon into the atmosphere, posing further risks to both reindeer populations and humans alike.