Research Database
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Long-term tree population growth can predict woody encroachment patterns
Year: 2025
Recent increases in woody plant density in dryland ecosystems—or “woody encroachment”—around the world are often attributed to land-use changes such as increased livestock grazing and wildfire suppression or to global environmental trends (e.g., increasing atmospheric carbon dioxide). While such changes have undoubtedly impacted ecosystem structure and function, the evidence linking them to woody encroachment is mixed, and the underlying processes are not fully understood. To clarify the role of demographic processes in changing woody plant abundance, we conducted a meta-analysis of tree age…
Publication Type: Journal Article
Trailing edge contractions common in interior western US trees under varying disturbances
Year: 2025
As climate warms, trees are expected to track their ideal climate, referred to as ‘range shifts’; however, lags in tree range shifts are currently common. Disturbance events that kill trees may help catalyse tree migrations by removing biotic competition, but can also limit regeneration by eliminating seed sources, and it is unknown whether disturbance will facilitate or inhibit tree migrations in the face of climate change. Here we use national forest inventory data to show that seedlings of 15 dominant tree species in the interior western United States occupy historically cooler areas than…
Publication Type: Journal Article
Indigenous stewardship rights and opportunities to recenter Indigenous fire
Year: 2025
Wild and intentionally ignited fires are not new to North American landscapes or to the Indigenous cultures whose ancestral places encompass them. For millennia, Indigenous fire stewardship has been regionally and locally distributed across North American ecosystems. These practices reshaped fire regimes to provide safe living and foraging conditions and reduced wildfires and their emissions prior to Euro-American colonization. Euro-American colonization impacts initially included introduction of foreign diseases and widespread genocide, which broadly diminished the extent of Indigenous fire…
Publication Type: Journal Article