Most of the current survey data show that trees are more resistant for mixed forest than pure forest. Because of the high biodiversity in mixed forest, the stability and resistance of the stands are even stronger than that of the pure forests with low biodiversity. In addition, the canopy interlacing in the mixed forest can prevent rain and snow from intercepting within a certain range, reducing the amount of ice and snow carried by the canopy of the lower layer, thereby reducing the degree of damage. Natural tree species and their stable structure are the result of their long-term evolution, so their resistance is higher than that of plantations. Artificial forests generally use the introduction modes, the unreasonable plantation will lead to its resistance dropping, so the artificial forest was harder than the natural forest. The situation of different types of forests is quite different. It is generally accepted that conifers are more affected than broad-leaved ones because coniferous forests are mostly pure forests. The broadleaf forest is mostly mixed forest, so the damage degree of coniferous forest is higher than that of broadleaf forest.
In addition, the afforestation situation is closely related to the afforestation measures and management status. The unreasonable management of the stands will result in the poor growth of trees, the rampancy of pests and diseases and the decline of the ability of the forest to resist freezing.
The information is provided by Disaster Risk Reduction Knowledge Service.
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