Study On The Health Dynamics Of The Port Sea Ecosystem

Marine plays an important role in the 21st century. Ecological and environment problems caused by the increasing of the marine development activities. It is necessary to make quantitative evaluation by the evaluating of Marine ecosystem health in the drastic developed areas.This paper selects port which has high-strength exploitation as the study area,building "Eco-environment" and "Pressure-State-Response" this two indicator systems which is focusing on the statements of the marine ecosystem and the influences by the pollution from land-based source or other human factors. By building the variable fuzzy evaluation model, this paper evaluates 4 years' results of the research areas and analyzes the time space trends and driving factors of port area ecosystem health baseing on the results. The results show that: Dafeng port Marine ecosystem health is between "B and C". From the point of view of time distribution,study area's ecological system health trends deterioration. From the point of view of spatial distribution, the study area ecosystem health trends good from the wharf engineerings and reclamation works to opea areas. For quality ecological and terrigenous pollutants in water environment deterioration of ecosystem health is the driving factors.At present, the Marine ecosystem health research in the affects of artificial intervention is relatively rare in academia. This paper selects port which has high-strength exploitation as the study area for the first time. Basing on different concerns of ecological system health,this paper builds two index systems and finds dynamic tendency, spatial variation and influencing factors of the port ecosystem health through the comparison of multi stations in different years.