Climate Change Impacts on Boreal Forest Ecosystems

The boreal forest, or taiga, represents the world’s largest terrestrial biome, spanning northern Eurasia and North America. Rising temperatures and shifting precipitation patterns are altering fundamental ecosystem processes, from tree growth and species distributions to disturbance regimes and carbon dynamics. Warming has lengthened growing seasons and, in some regions, enhanced early-successional tree growth, while exacerbating drought stress and increasing wildfire frequency at southern margins. These changes drive an asymmetrical response in forest extent, with limited expansion at northern edges and pronounced contraction in temperate boundaries. Altered disturbance regimes, including more severe fire and pest outbreaks, interact with management practices such as harvesting to reshape stand structure and biodiversity. Collectively, these processes threaten the boreal biome’s capacity as a global carbon sink, affect surface albedo and hydrological cycles, and challenge traditional forestry and conservation strategies. Understanding species-specific growth responses, habitat suitability and ecosystem resilience under future climates is essential for guiding adaptive management and mitigating feedbacks to the climate system.

Research from Nature Portfolio

Recent studies have revealed a pronounced north–south asymmetry in tree cover change across North American boreal forests, with core-range densification but no detectable expansion at high latitudes, alongside significant loss at southern boundaries linked to wildfire and logging. Analyses indicate this pattern as an early warning of biome contraction and potential long-term carbon declines. Other work has combined satellite-derived canopy height with stand-age chronosequences to map growth potential across the Russian boreal region, uncovering a substantial young-forest growth sink if regenerating stands are allowed to mature free from disturbance. Foundational research in eastern Canada has demonstrated that moderate warming (around 2 °C) can boost productivity by over 10 per cent in the absence of disturbance, yet further warming and associated drying reverse these gains, underscoring the transitory nature of warming-induced growth benefits and the heightened vulnerability of boreal forests to excessive heat and water stress.

Climate Change Impacts on Boreal Forest Ecosystems publication trend

The graph below shows the total number of articles in climate change impacts on boreal forest ecosystems across all publications each year (not limited to Nature Index journals).

Technical terms

Boreal forest: The high-latitude biome dominated by coniferous trees, characterised by cold climates, short summers and extensive peatlands.

Carbon sink: A system component that absorbs more carbon dioxide from the atmosphere than it releases, such as growing biomass in forests.

Site index: A forestry measure of the potential growth capacity of a site, often expressed as the expected height of dominant trees at a reference age.

Range shift: The geographic movement of a species’ distribution in response to environmental change, commonly along latitudinal or altitudinal gradients.

References

1. Northern expansion is not compensating for southern declines in North American boreal forests. Nature Communications (2023).
2. Russian forests show strong potential for young forest growth. Communications Earth & Environment (2025).
3. Beneficial effects of climate warming on boreal tree growth may be transitory. Nature Communications (2018).
4. Shifts in native tree species distributions in Europe under climate change. Journal of Environmental Management (2024).
5. Large Impacts of Climatic Warming on Growth of Boreal Forests since 1960. PLOS ONE (2014).
6. Harvesting interacts with climate change to affect future habitat quality of a focal species in eastern Canada’s boreal forest. PLOS ONE (2018).