Effects of Environmental Disturbances on Synchrony and Stability of Food Webs
Based on niche model,this paper has established relationships of eight species,and introduced random environmental fluctuations factors.The article focuses on analyzing the temporal dynamic,synchrony,and stability of the system caused by different intensity of environmental fluctuations.In this paper,Fourier transform and wavelet transform methods are mainly used in order to analyze the period and synchrony of species changes.The simulation results show that medium intensity of environmental fluctuations increase the stability of eight species,whose interspecific synchrony intensity reach a high level,which is consistent with the intermediate disturbance hypothesis.With the increase of environmental fluctuations,species will become extinct and synchrony between top predators and their strong-linked species will weaken.Additionally,the strength of environmental fluctuations and interspecies correlation affect the synchrony period of species,where positive-correlated environmental changes and high intensity environmental fluctuations shorten the synchrony period of species,while negative-correlated environmental changes lengthen the synchrony period.
random fluctuationssynchronystabilitywavelet analysis
万方数据
维普
