trends analysis of ecological environment security based on dpsir model in the coastal zone: a survey study in tianjin, china

the “driving force - pressure - state - impact – response” modeling framework isadopted to consider the formation mechanisms of environmental risks and the requirements ofecological environment protection. moreover, a systematical index system and evaluation model forthe measurement of the coastal ecological security level is put forward in this paper to assess thestate of coastal ecological environment security. the results show that the security level of thetianjin coastal ecological environment exhibits an overall downward trend, with the coastal ecologicalenvironment security value (e) falling from 0.7491 in 2005 (in good condition) to 0.2773 in 2010 (in apoor state) , and the value will continue to decline into a bad state in the next decade. the increasinguse of coastal areas, growing population and increasing emissions of pollutants into the sea are theprimary phenomena leading to environmental degradation of coastal ecosystems, which furtherleads to the degeneration of the ecological and environmental conditions of the coastal zone intianjin. the inshore marine ecosystem is always in the sub-healthy and unhealthy state, which hasaffected the balance of the marine ecosystem and led to poor biomes structure. at present, themarine ecosystem conservation actions, including pollution control, monitoring and surveillancesystem and emergency management mechanism, are not enough to offset the impacts on the marineecosystem caused by driving force and pressure changes. it is necessary to establish a coordinatedintegration management system for the land and sea and an ecological compensation mechanism.