The ratios of damaged tree samples to total tree samples decrease
in the order of Chinese fir > masson pine > slash pine,
evergreen broad-leaved > deciduous broad-leaved,
mixed coniferous > mixed needle broad-leaved > mixed forest and bamboo.
Plot damage rate decreases in the order of slash pine > masson pine > Chinese fir,
natural secondary deciduous broad-leaved > bamboo > mixed forest
and bamboo > mixed needle broad-leaved > evergreen broad-leaved > mixed coniferous.
The biological characteristics of tree species, especially the difference of
cold tolerance and frost resistance, have a great impact on the extent
and manifestation of their damage. The characteristics of tree species
are the physiological and inherent prerequisites for the forest to
resist the snow-ice disaster and provide a potential possibility for it
to resist natural disasters. It is the most basic, the most important and
the most powerful of all the factors. Due to the difference in physiological
and ecological characteristics of different plants, their sensitivity to extreme rain
and snow is also very different. So among the many influencing factors,
the research on tree species is the most concerned. Bamboo such as bamboo shoots
in autumn are generally more damaged than bamboo shoots in spring，because their metabolism is more active and the degree of lignification is not high,
making them more vulnerable to the impact of frost damage. The root system
can affect the lodging resistance of forest trees. The lodging of forest trees
has a significant relationship with the number, size and root biomass of lateral roots.
Larger number of lateral roots, coarser, root biomass of larger trees lodging more capable.
In addition, the fast-growing tree species are more severely affected than the
slow-growing tree species because the tree height of the fast-growing tree species
grows rapidly with relatively high aspect ratio ,which is prone to breakage. Evergreen
species are more devastated than deciduous species , because deciduous trees carry
less ice and snow than evergreens in the event of a disaster; Alien tree species
are harmed more than native species.
The information is provided by Disaster Risk Reduction Knowledge Service.