Study On The Ecological Environment Of Proposed Marine Ranching In Dachangshan Waters

According to the data of eco-environment surveys (in May, August, November2013) in proposed Marine Ranching in Dachangshan, the assessment on water qualitycondition of the proposed Marine Ranching in Dachangshan was carried out using thesingle factor standard index, the nutrition condition performance figure, the nutritionindex, the organic pollution appraisal index and the Nemerow pollution index; thesurface sediments of the proposed Marine Ranching in Dachangshan were assessed bythe single factor standard index, the integrated pollution index and the potentialecological risk assessment; the Biological environment of the proposed MarineRanching in Dachangshan were assessed by the Shannon-Weaver diversity index,species Pielou index and the species richness. Based on the analysis of the underlyingdata, in four areas of water quality, sediment, food organisms, large swimmingbiological basis for the evaluation, we establish a comprehensive evaluation system.From the ecological aspects of the ecological status of the evaluation and analysis ofthe proposed marine ranching, provide a theoretical basis for the next building andconstruction advice marine ranch.The results were as follows:(1) The water quality condition of the proposed Marine Ranching in DachangshanThe water quality condition of the proposed Marine Ranching in Dachangshanwas in a light pollution level in May2013; Water quality indicators are in line with thewater quality standards for Class I in August, November.Eutrophication problems do not exist, the overall level of nutrition for the poor inMay,August,2013.The organic pollution level was in Class I, and the water quality was better inMay,2013. More than half of stations degree of organic pollution of marine waterquality bit Ⅱ in August, the waters began to be contaminated.(2) The surface sediments of the proposed Marine Ranching in DachangshanThe surface sediments of the proposed Marine Ranching in Dachangshan was wellin May, August and November2013. The mean of Single factor pollution index andintegrated pollution index showed a low pollution status.The surface sediments of theproposed Marine Ranching in Dachangshan was in the low level of potential ecologicalrisk.(3) The Biological environment of the proposed Marine Ranching in DachangshanThe results of the diversity of phytoplankton showed that in May and Novemberin the proposed Marine Ranching in Dachangshan, had high diversity of phytoplankton community structure, good stability; community structure in August diversity ingeneral. The results show that the diversity of zooplankton, The phytoplanktondiversity of the proposed Marine Ranching in Dachangshan was higher, and had abetter stability in August and November; Community structure diversity was in generalin May.(4) Comprehensive ecological assessment of proposed Marine Ranching inDachangshanOn average calculation results of all year showed that:The year evaluation valueof A area was0.699; The year evaluation value of B area was0.691; The yearevaluation value of C area was0.649;A>B>C. On average calculation results of Springshowed that: The evaluation value of A area was0.683; The evaluation value of B areawas0.701; The evaluation value of C area was0.682; B> A>C. On averagecalculation results of Summer showed that: The evaluation value of A area was0.650;The evaluation value of B area was0.664; The evaluation value of C area was0.607; B> A>C. On average calculation results of Autumn showed that: The evaluation valueof A area was0.647; The evaluation value of B area was0.651; The evaluation value ofC area was0.632; B> A>C.