Mechanism of species dynamics and interactions under impacts of artificial barriers in coastal areas

Abstract Coastal reclamation engineering structures are exerting significant isolation effects on dynamics of local species. In this research, a population dynamics model was developed for investigating and analyzing dispersal patterns under isolation of artificial barriers in coastal areas. The proposed model have the following advantages: a) revelation of responses for population dynamics under multiple types of artificial barriers; b) reflection a general link between species predation, competition and density-dependent population growth under pressure of artificial barriers. Three barrier types including dotted distribution (DD), linear distribution (LD) and facet distribution (FD) were analyzed and discussed. As the results, the population decline rate for FD would be 10.22% higher than that for LD. The LD could be conducive to protecting the ecological balance of coastal organisms. Based on satisfying the requirements of coastline protection, LD would be an important reference for coastal engineering design and management in future.