Response Analysis of Intertidal Organism Communities to Environmental Change in Qinzhou Bay

【Objective】In order to study the relationship between the changes of the intertidal biological communities and environmental disturbance,surveys of the intertidal organism were carried out in 5sections in Qinzhou Bay from 2009 to 2012.【Methods】The methods of analogue and ABC curves were used to analyze and compare the investigation data.【Results】The results showed that the biomass of the intertidal organism obtained in the second investigation was higher than that of the first one,and the least increment of biomass was 0.65 times in TransectⅣ while the biggest one is 37.19 times in TransectⅡ.It was deduced that the rises of the 3transects on the west side of Jingu River were not only due to the seasonal variation.The ABC curves showed that the biotic communities in TransectⅠ,TransectⅣ subjected to medium strength interference from the surrounding disturbance,especially,TransectⅤ subjected to the highest strength interference.In contrast,the biotic communities in transectⅢ were not inter-fered in both survey periods.【Conclusion】The differences of the variation of biotic communities with years change in different transects were related to the environmental change derived from sea reclamation.The intertidal biomass in some transects that were far from the sea reclamation area or in weak hydrodynamic force area would obviously increase,and also dominant species succession in biotic communities would happen.