Subalpine tree seedlings: Assessing aging methodology and drivers of establishment
نویسندگان
چکیده
The recent impacts of climate change have threatened the health and functioning forested ecosystems on a global scale. Widespread tree mortality from altered disturbance regimes creates significant uncertainty about recovery in subalpine ecosystems. Aging seedlings is an important mechanism for understanding regeneration, when paired with long-term climate, can provide critical information climatic drivers establishment. In this study, we destructively sampled aged 229 Picea engelmannii (Engelmann spruce) Abies lasiocarpa (subalpine fir) beetle-affected postfire stands northern Colorado southern Wyoming. We modeled relationship between nondestructive aging methods seedling age to assess accuracy proxies predicting true seedlings. compared conditions years high establishment non-establishment ascertain regional recruitment. Both height terminal bud scar counts were predictors age, although correlations weaker older that exhibited suppressed growth. Growing season precipitation had positive spruce-fir while minimum temperatures, annual vapor pressure water deficits negative Height do not accurately predict precise ages but more Average may suitable low-levels stands. However, large pulses occur cooler wetter growing average, posing new recruitment warming world.
منابع مشابه
Positive Feedback Between Tree Establishment and Patterns of Subalpine Forest Advancement, Glacier National Park, Montana, U.S.A
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ژورنال
عنوان ژورنال: Forest Ecology and Management
سال: 2021
ISSN: ['0378-1127', '1872-7042']
DOI: https://doi.org/10.1016/j.foreco.2021.119516