نتایج جستجو برای: forest dieback
تعداد نتایج: 107101 فیلتر نتایج به سال:
Droughts negatively impact forests by reducing growth and increasing defoliation leading to forest dieback as the climate becomes warmer and drier. However, the timing and severity of droughts determine how differently or intensively water shortage affects primary (shoot and leaf formation) and secondary growth (stem radial growth based on tree-ring widths). We compare the impact of two severe ...
Climate change is expected to increase the frequency and intensity of droughts and heatwaves in Europe, leading to effects on forest growth and major forest dieback events due to hydraulic failure caused by xylem embolism. Inter-specific variability in embolism resistance has been studied in detail, but little is known about intra-specific variability, particularly in marginal populations. We e...
Hymenoscyphus fraxineus is an invasive fungal species causing the most serious disease of ashes (Fraxinus spp.) in Europe—ash dieback. The biology of this fungus is not totally elucidated, neither its relation to the saprophytic species Hymenoscyphus albidus, native in Europe. Our study is focused on the description of seasonal spore dispersal of both fungi and its relation to meteorological co...
Tree roots of northern hardwoods are shallow rooted, winter active, and minimally frost hardened; dieback is a winter freezing injury to roots incited by frost penetration in the absence of adequate snow cover and exacerbated by drought in summer. High soil water content greatly increases conductivity of frost. We develop a model based on the sum of z-scores of soil frost (December–February) an...
Abstract Drought-induced forest dieback can lead to a tipping point in community dominance, but the coupled response at tree and stand-level has not been properly addressed. New spatially temporally integrated monitoring approaches that target different biological organization levels are needed. Here, we compared temporal responses of dendrochronological spectral indices from 1984 2020 both sta...
• Climate warming and droughts impact growth in central European oak forests. Growth shifts old-growth managed Quercus petraea declining trees are identified. sensitivity forests is higher than Past use legacies stand structure drive sensitivity. Managed more vulnerable under forecasted climate-warming. warming-related drought could become a major driver of large-scale forest dieback. However, ...
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