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Updated: May 3, 2026
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Development of an Individual-Tree Basal Area Increment Model using a Linear Mixed-Effects Approach
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Different Tree Recruitment Patterns at Treelines Are Associated With the Atlantic Multi-Decadal Oscillation Across
Xiaoming Lu1, Flurin Babst2,3, Eryuan Liang1
1State Key Laboratory of Tibetan Plateau Earth System, Environment and Resources (TPESER), Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing, China.
Global Change Biology
|May 2, 2026
Summary
Large-scale climate patterns like the Atlantic Multi-decadal Oscillation (AMO) significantly impact global tree recruitment. Understanding these climate-AMO links is crucial for predicting future forest shifts in harsh environments.
Area of Science:
- Ecology
- Climate Science
- Forestry
Background:
- Tree recruitment is vital for forest dynamics, but climate variability's role remains unclear.
- Large-scale atmospheric patterns, like the Atlantic Multi-decadal Oscillation (AMO), influence global climate and ecosystems.
- The connection between forest dynamics and AMO, especially at treelines, is not well understood.
Purpose of the Study:
- Investigate tree recruitment dynamics and their relationship with climate and AMO.
- Analyze these relationships across the Northern Hemisphere's treeline sites.
- Understand how AMO influences regional climate and tree recruitment.
Main Methods:
- Utilized field survey data from 68,011 trees at 120 treeline sites.
- Examined tree recruitment patterns and climate data from 1951-2010.
- Correlated recruitment trends with regional climate variables and AMO phases.
Main Results:
- Observed increasing tree recruitment in mid-latitude regions (Tibetan Plateau, Central China).
- Documented decreasing recruitment at high latitudes (Scandinavia-Kola, Ural-Siberia).
- Found inverse recruitment patterns between Western North America and Alaska-Northern Canada, linked to AMO-driven warming and precipitation changes.
Conclusions:
- Large-scale atmospheric patterns modulate regional climate, affecting treeline dynamics.
- Warming and adequate moisture generally enhance recruitment, while drought and low precipitation reduce it.
- Results inform forecasts of future forest shifts in climatically challenging areas.
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