奥茅卷转虫Ammonia aomoriensis(Asano,1951)与毕克卷转虫Ammonia beccarii(Linnaeus,1758)(有孔虫)的分类学以及在黄东海分布的温盐深特征比较研究  

AMMONIA AOMORIENSIS(ASANO,1951)AND AMMONIA BECCARII(LINNAEUS,1758)(FORAMINIFERA):COMPARISONS ON THEIR TAXONOMY AND ECOLOGICAL DISTRIBUTIONS CORRELATED TO TEMPERATURE,SALINITY AND DEPTH IN THE YELLOW SEA AND THE EAST CHINA SEA

作　　者：类彦立[1] 李铁刚[2] 

机构地区：[1]中国科学院海洋研究所海洋生物分类与系统演化研究室,青岛266071 [2]中国科学院海洋研究所海洋地质与环境重点实验室,青岛266071

出　　处：《微体古生物学报》2015年第1期1-19,共19页Acta Micropalaeontologica Sinica

基　　金：国家自然科学基金(41176132;41476043);中国科学院战略性先导科技专项(A类)(XDA11030201);大陆架科学钻探项目(GZH201100202);海洋生物群落结构对气候变化的响应(GASI-03-01-03-01;MGK1210;No.201303)共同资助

摘　　要：Ammonia aomoriensis(Asano,1951)和Ammonia beccarii(Linnaeus,1758)是两个形态学易混淆,但被广泛使用并具有重要环境指示意义的有孔虫。通过对渤海、黄海和东海陆架区60个站位表层沉积物的水平分布调查,并连续17个月对潮间带分低潮区和高潮区进行了季节调查,对二者的形态分类、生态分布和环境关系进行比较研究。结果表明A.aomoriensis和A.beccarii在潮间带的丰度都有季节性变化,体现冬高夏低的特点,前者一般在高潮区较多,后者在低潮区较多。二者的丰度从潮间带到陆架区随着水深的增加呈阶梯式锐减:平均含量分别达22%和39%;在水深<20m的陆架区平均含量分别降至15%和6%;在水深>20m的陆架区平均含量分别再次降至0.6%和1.4%。统计分析表明二者对盐度和水深的响应相似,但对温度的反应存在差异:在潮间带环境,二者的丰度都与盐度显著正相关;在浅海陆架环境,二者的丰度都与水深呈显著负相关;无论在潮间带还是陆架海区,A.beccarii的丰度都与海水温度呈显著负相关,但A.aomoriensis与温度相关性不显著。本研究结果显示A.aomoriensis和A.beccarii对滨岸浅海都具有优越的指示作用,在古环境分析中,首先可根据二者的含量进行环境推测(潮间带或者陆架浅海),再利用不同环境下本文所建立的线性方程对海水温、盐、深进行大体的估算。Ammonia aomoriensis（Asano,1951）and Ammonia beccarii（Linnaeus,1758）were two morphological confusing species but were widely studied due to their environmental significances.Based on the investigation of spatial distributions of benthic foraminifera among 60 stations from continental shelf sediments of the Bohai Sea,the Yellow Sea and the East China Sea and the study of seasonal dynamics of foraminifera at intertidal area according to 17months＇ continous samplings,A.aomoriensis and A.beccarii were distinguished and were compared in their taxonomic,ecological and environmental parameters.Our results revealed a distinct seasonal dynamics in their abundances,varying from higher value in winter to lower value in summer at the intertidal area.In addition,A.aomoriensis was more abundant at the high intertidal zone but A.beccarii was abundant at the lower zone.However,the distributions of two species from intertidal area to continental shelf sediments showed a stepwise reduction：mean relative abundances were 22% and 39%,respectively.At the continental shelf of〈20m water depth,their relative abundances decreased to 15%and 6%,respectively;when the water depth was〉20m,their occupation reduced to 0.6%and 1.38%,respectively.Statistical analysis results showed both A.aomoriensis and A.beccarii had a similar response to the salinity and depth,but had different response to the temperature：at the intertidal area they were both positively correlated to the salinity,while at the continental shelf sediments they were both negatively correlated to the water depth.As to the temperature,only A.beccarii showed a significantly negatively response.Paleoenvironmental research could firstly estimate their living habitats（intertidal area/continental shelf）according to their relative abundance,and secondly to evaluate corresponding marine temperature,salinity or depth based on our formation equations.

关 键 词：有孔虫 分类 生态分布 环境指示 温度 盐度 水深 黄东海 

分 类 号：Q959[生物学—动物学]