CAJ | 학술논문

2010年4月在吕泗大洋港近岸海域进行了海洋浮游动物群落特征调查,共鉴定浮游动物6大类14种。其中原生动物砂壳纤毛虫1种,桡足类9种,糠虾类1种,磷虾类1种,涟虫类1种,毛颚类1种。浮游动物的丰度为16~1193个/m3,平均值为422个/m3。主要优势种为克氏纺锤水蚤(Acartia clause)、火腿许水蚤(Schmackeria poplesia)、真刺唇角水蚤(Labidocera euchaeta)、中华哲水蚤(Calanus sinicus)、小拟哲水蚤(Paracalanus parvus)、短角长腹剑水蚤(Oithona brevicornis)。优势度分别为0.876、0.477、0.299、0.271、0.255、0.187。各类指数变幅较大(种类数为5~10,丰富度指数为0.471~1.507,多样性指数为0.847~2.130,均匀度指数为0.282~0.759)。丰富度指数均值为0.802,多样性指数均值为1.485,均匀度指数均值为0.530。相关性分析表明,春季浮游动物丰度与化学需氧量和活性磷酸盐呈显著的正相关性,与水深之间有极显著的负相关；浮游动物种类数与悬浮物含量呈显著的负相关；浮游动物均匀度指数与悬浮物含量呈显著的正相关,与锌含量呈极显著的负相关；丰富度指数与活性磷酸盐(PO4-P)含量和悬浮物含量(SPM)呈显著的负相关；多样性指数与锌含量呈显著的负相关。调查海域水质状况的生物多样性指数评价显示,目前该海域水质总体已处于中度污染。
2010년4월재려사대양항근안해역진행료해양부유동물군락특정조사,공감정부유동물6대류14충。기중원생동물사각섬모충1충,뇨족류9충,강하류1충,린하류1충,련충류1충,모악류1충。부유동물적봉도위16~1193개/m3,평균치위422개/m3。주요우세충위극씨방추수조(Acartia clause)、화퇴허수조(Schmackeria poplesia)、진자진각수조(Labidocera euchaeta)、중화철수조(Calanus sinicus)、소의철수조(Paracalanus parvus)、단각장복검수조(Oithona brevicornis)。우세도분별위0.876、0.477、0.299、0.271、0.255、0.187。각류지수변폭교대(충류수위5~10,봉부도지수위0.471~1.507,다양성지수위0.847~2.130,균균도지수위0.282~0.759)。봉부도지수균치위0.802,다양성지수균치위1.485,균균도지수균치위0.530。상관성분석표명,춘계부유동물봉도여화학수양량화활성린산염정현저적정상관성,여수심지간유겁현저적부상관；부유동물충류수여현부물함량정현저적부상관；부유동물균균도지수여현부물함량정현저적정상관,여자함량정겁현저적부상관；봉부도지수여활성린산염(PO4-P)함량화현부물함량(SPM)정현저적부상관；다양성지수여자함량정현저적부상관。조사해역수질상황적생물다양성지수평개현시,목전해해역수질총체이처우중도오염。
Changes in the species assemblage or abundance of zooplankton have a direct impact on both primary productivity and the biomass of fish and other marine animal resources. Species composition, biomass, abundance and community structure of zooplankton have a close relationship with the dynamics of hydrologic environment. Zooplankton is a key member of marine food webs, so they are the focus of a number of studies in the Changjiang estuary. The majority of these studies have evaluated zooplankton population dynamics at a large scale. Herein, we evaluated the species composition, quantitative distribution, dominant species, and community structural characteristics of zooplankton at 20 inshore sites near the Lvsi Ocean Port (32.04°~32.20°N, 121.56°~121.80°E) in April 2010. We identified 14 species belonging to 6 groups, including 9 species of Copepoda, 1 species of Protozoa, 1 Chaetognath, 1 Cumacea, 1 Euphausiacea and 1 Mysidacea. The abundance of zooplankton ranged from 16 to 1193 ind./m3 (mean: 422 ind./m3). The most abundant group was the Copepoda. Eight species had a dominance index ranking of >0.02 within the study area. Among these, Acartia clausi, Schmackeria poplesia, Labidocera euchaeta, Calanus sinicus and Paracalanus parvus were the primary dominant species (dominance index: 0.876, 0.477, 0.299, 0.271 and 0.255, respectively). The amplitude of the index varied significantly (species: 5 to 10, richness: 0.471~1.507, diversity index: 0.847~2.130, evenness index: 0.282~–0.759) suggesting the community structure was instable. The mean diversity index of zooplankton was 1.485, the mean richness index was 0.530, and the mean evenness index was 0.587. The correlation analysis shows that the abundance of zooplankton and COD and PO4-P were significantly correlated (correlation coefficients: 0.528 and 0.502, respectively; P<0.05). The abundance of zooplankton and water depth were significantly negative correlated (P<0.05) (correlation coefficients:–0.586;P<0.01). We observed a significant negative relationship between the number of species and the content of the suspended substance (correlation coefficients:?0.509, P<0.01). We found a significant correlation between the evenness indices of zooplankton and the content of the suspended substance. We observed a significant negative correlation between the evenness indices and the content of Zn. The Species richness index of zooplankton and COD and the content of the suspended substance were significantly negative correlated (correlation coefficients:?0.523 and ?0.473, respectively; P<0.05). Diversity Index and the content of Zn were significantly negative correlated (correlation coefficients: ?0.524; P<0.05). The zooplankton diversity index has since been adopted to assess water quality near the Lvsi Ocean Port in Jiangsu province. Monitoring results indicate that the quality of seawater is under intermediate pollution.