Trees, as a species, do move over time. They migrate in response to environmental challenges, especially climate change. Surprisingly, they don’t all go to the Poles, where it is cooler. As it turns out, more of them head west, where it is getting wetter.
Sure, some species, such as evergreens, are heading to the Poles to escape the heat. But others, like certain oaks and maple, are going west in search of rain. For the most part, “tree migrations are moisture related,” said Songlin Fei, associate professor at Purdue’s University’s department of forestry and natural resources, who has studied this phenomenon in recent years. “Precipitation has a stronger near-term impact on species shift than temperature.”
Both trends are a consequence of climate change, which is producing more heat and heavier rainfall, fueling deforestation. This is worrisome, as forests soak up carbon from the atmosphere, and recent evidence suggests that soil is exhaling carbon dioxide faster than trees can take in. The migration of trees may help preserve individual species, but also threatens to destabilize forest ecosystems.