Thoretical Study On Self-healing Time Of Population Under Dynamic Disturbance

With the deepening of industrialization and globalization,problems such as environmental pollution and species invasion have become increasingly serious,and the ecosystems in many areas have reached the brink of collapse,which has had a profound impact on biodiversity and the living environment of humans.Therefore,how to quickly restore the damaged ecosystem through human intervention is very necessary.In this paper,a new model framework is constructed,and the time required for a stable population to reach a steady state after being disturbed by different characteristics is explored.Specifically speaking,population characteristics such as intraspecific competition and species dispersal.Disturbance characteristics including factors such as the size of the disturbance area,spatial correlation of disturbance and recovery rate of disturbance are being considered as well.Some significant results are obtained through numerical simulations:At a lower disturbance recovery rate,the self-healing time of the global disperse and local disperse populations will not be affected by the spatial correlation of the disturbance,no matter whether intraspecific competition exists or not.Moreover,it takes a long time for the populations of the two dispersal methods to complete self-healing.At a moderate disturbance recovery rate,for locally dispersing populations,the spatial correlation of the disturbance has a significant impact on population self-healing,regardless of the presence of intraspecific competition.The higher the spatial correlation of the disturbance is,the longer time it takes for self-healing.By contrast,for globally dispersing populations,the disturbance’s spatial correlation will have no impact on population self-healing time when there is no intraspecific competition.But when intraspecific competition exists,the higher spatial correlation of disturbances is,the longer time it takes for self-healing.The population self-healing time of the two dispersal methods is drastically reduced under this scenario,and the performance of the global dispersal population is better than that of the local dispersal population.At a high disturbance recovery rate,the impact of disturbance on global and local dispersal populations is basically the same as that at a medium disturbance recovery rate.But at this time,the population self-healing time of the two dispersal methods will increase in other cases,except for the global dispersal population without intra-species competition.From the results of this simulation,it can be seen that there are many factors that affect the self-healing time of the population.The research results of this paper have certain guiding significance for understanding population protection in disturbed habitats,control of alien invasion,and pest control.