Research progress on effects of fire disturbance on stand structure and vegetation regeneration

Forest fire is an important disturbing factor in forest ecosystem. Severe forest fire will destroy the stand structure and affect the stability of the ecosystem, but moderate fire disturbance can promote vegetation renewal, change community succession dynamics, and enrich species diversity. In this paper, the effects of fire disturbance on stand structure and vegetation regeneration are reviewed, especially the effects of fire disturbance on tree survival, stand structure and vegetation regeneration. Research indicates that it is considered that deforestation caused by fire is a key factor affecting stand structure and tree species composition. The change of vegetation community after forest fire disturbance mainly depends on fire intensity. Light fire disturbance has little effect on the arborous layer, while heavy fire disturbance will cause reverse succession to the ecosystem. At present, t Both domestic and foreign research efforts have been concentrated on the investigation of forest structure and vegetation regeneration following fire disturbance in diverse forest types, fire intensities, fire severity, seasons, and various burn types. However, there remains a deficiency in long-term and consecutive research on the mechanisms of tree growth and vegetation regeneration under fire disturbance. In the future, relevant research should focus on the following aspects: based on the continuous monitoring of permanent sample plots, study the long-term dynamic changes of stand structure and vegetation renewal and succession under different fire disturbance conditions. Specify and augment a more comprehensive sampling dataset, integrate biophysical and physiological process modeling, and construct a more comprehensive prediction system to precisely predict the post-fire growth of trees in forests composed of different tree species. Thoroughly explore the relationships between forest fires and other disturbance factors, and analyze the interactive relationships between forest fires and forest stand structure. The research results will facilitate a better understanding and exploration of the mechanisms of fire disturbance on forest stand structure and plant regeneration, thereby promote the development of this field.