CAJ | 학술논문

于2007年8-9月在南海西部海域，使用浮游生物Ⅲ型网垂直拖网采集海洋表层(200m以浅)浮游砂壳纤毛虫，共发现7属12种，其中优雅真铃虫(Eutintinnus elegans)和勃兰氏拟平顶虫(Xystonellopsis brandti)为南海新纪录种。砂壳纤毛虫总丰度为0-11622个·m?2，平均(2218±2254)个·m?2。各站种丰富度范围为0-6种。优势种有5种：尖形钟形虫(Cyttarocylis acutiformis)、宽口钟形虫(Cyttarocylis eucecryphalus)、费瓦拟平顶虫(Xystonellopsis favata)、南方类铃虫(Codonellopsis meridionalis)、圆锥条纹虫(Rhabdonella conica)。圆锥条纹虫聚集强度最高，属于适盐、适温范围较窄的浮游动物；尖形钟形虫与宽口钟形虫的聚集性最弱，分布较为均匀。南海西部砂壳纤毛虫群落受南海流系、水团和季风的影响，整体稳定性均较低。大洋铃鼻虫(Codonaria oceanica)、费瓦拟平顶虫、圆锥条纹虫与温度、盐度、深度等呈现相关性，而总丰度、种丰富度与环境因子没有明显相关性。圆锥条纹虫与环境因子的相关性系数高。与南海北部相比，南海西部砂壳纤毛虫类群与南海北部为同一区系，但是种类组成中远洋种占主要部分，丰度大大低于南海北部。圆锥条纹虫的优势度(Y=9.4%)、平均丰度[(1811±1636)个·m?2]和最大丰度值(4809个·m?2)最高，且聚集强度高，与温盐因子的相关性较好。
우2007년8-9월재남해서부해역，사용부유생물Ⅲ형망수직타망채집해양표층(200m이천)부유사각섬모충，공발현7속12충，기중우아진령충(Eutintinnus elegans)화발란씨의평정충(Xystonellopsis brandti)위남해신기록충。사각섬모충총봉도위0-11622개·m?2，평균(2218±2254)개·m?2。각참충봉부도범위위0-6충。우세충유5충：첨형종형충(Cyttarocylis acutiformis)、관구종형충(Cyttarocylis eucecryphalus)、비와의평정충(Xystonellopsis favata)、남방류령충(Codonellopsis meridionalis)、원추조문충(Rhabdonella conica)。원추조문충취집강도최고，속우괄염、괄온범위교착적부유동물；첨형종형충여관구종형충적취집성최약，분포교위균균。남해서부사각섬모충군락수남해류계、수단화계풍적영향，정체은정성균교저。대양령비충(Codonaria oceanica)、비와의평정충、원추조문충여온도、염도、심도등정현상관성，이총봉도、충봉부도여배경인자몰유명현상관성。원추조문충여배경인자적상관성계수고。여남해북부상비，남해서부사각섬모충류군여남해북부위동일구계，단시충류조성중원양충점주요부분，봉도대대저우남해북부。원추조문충적우세도(Y=9.4%)、평균봉도[(1811±1636)개·m?2]화최대봉도치(4809개·m?2)최고，차취집강도고，여온염인자적상관성교호。
A total of 12 species of tintinnids in seven genera were found in the western South China Sea during summer 2007;in addition, two species (Eutintinnus elegans and Xystonellopsis brandti) were recorded for the first time in the South China Sea. The range of tintinnids abundance was from 0 to 11622 ind·m?2 with an average of (2218±2254) ind·m?2, and the species richness was from 0 to 6. The five dominant species were Cyttarocylis acutiformis, Cyttarocylis eucecryphalus, Xystonellopsis favata, Codonellopsis meridionalis, and Rhabdonella conica. The dominance degree of R. conica was the highest, so was its aggregation intensity, which means that it was more closely related to environmental changes. Cyttarocylis acutiformis and C. eucecryphalus were given the lowest aggregation intensity and more evenly distributed spatially. Both species diversity and species evenness in the western South China Sea were low due to the effects of monsoon, ocean currents and different water masses, which indicates that tintinnids community were in an unstable state. Correlation analysis by SPSS (Statistical Product and Service Solutions) software revealed no significant correlation among tintinnids abundance, species abundance and environment factors. Codonaria oceanica, X. favata and R. conica showed significant relationships with environment factors. The community structure was characterized by more pelagic species and more unstable in the western South China Sea than in the northern South China Sea. R. conica was considered as biological indicator species of water masses for its high average abundance [(1811±1636) ind·m?2] and maximum abundance (4809 ind·m?2), and fine correlation with environmental factors.