青岛湾潮间带活体底栖有孔虫Ammonia aomoriensis(Asano,1951)壳体δ^18O值的季节变化  

Seasonal oxygen isotope variation of a living benthic foraminifera Ammonia aomoriensis(Asano,1951) in the intertidal area of Qingdao Bay, Yellow Sea, China

作　　者：俞宙菲[1,2] 类彦立[1] 李铁刚[1,3,4] 

机构地区：[1]中国科学院海洋研究所,山东青岛266071 [2]中国科学院大学,北京100049 [3]国家海洋局第一海洋研究所,海洋沉积与环境地质国家海洋局重点实验室,山东青岛266061 [4]青岛海洋科学与技术国家实验室海洋地质过程与环境功能实验室,山东青岛266061

出　　处：《海洋科学》2016年第7期132-139,共8页Marine Sciences

基　　金：国家自然科学基金(41476043,41230959,41176132);中国科学院战略性先导科技专项(A类)(XDA11030104);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;DOMEP(MEA)-01-01-E;No.201303;MGK1210)~~

摘　　要：近岸浅水底栖有孔虫是陆架海区古环境重建的重要手段,但是至今对其活体的研究非常缺乏。2014年6月至2015年5月对青岛湾潮间带活体底栖有孔虫Ammonia aomoriensis进行了连续12个月的采样,用虎红染色以确认活体。对壳径范围在200-550μm的活体壳体,以每增加50μm壳径为一组,进行δ^18测试。结果显示,A. aomoriensis壳体δ^18的月平均值的季节变化趋势与温度和盐度一致,与温度反相关,与盐度正相关,即青岛湾A. aomoriensis壳体δ^18值受温度和海水δ^18的影响,其壳体δ^18值表现出了很好的季节性波动。但是A. aomoriensis壳体δ^18的变化滞后于所测温度和盐度约2个月,其记录的是虫体在生长周期内在真实钙化温度下分馏所得的δ^18值。A successive 12-month study （June 2014 to May 2015） was conducted on the oxygen isotope composi-tion （δ^18） of living benthic foraminiferaAmmonia aomoriensis, from the intertidal flats of Qingdao Bay, Yellow Sea, China.δ^18 values were measured in different diameter test groups, ranging from 200μm to 550μm, at 50μm intervals, from Rose Bengal stained specimens. The results showed that the fluctuant pattern ofδ^18 was remarka-bly similar to the temperature and salinity changes, negative and positive, respectively. The variation inδ^18 in livingA. aomoriensis was influenced by temperature and seawaterδ^18, and exhibited a seasonal pattern which showed a time-lag of about two months. This result implies that the large shell of A. aomoriensis reflects the envi-ronmentalδ^18 conditions during the months when the chambers form, and probably record the oxygen isotopes, obtained by fractionation under actual calcification temperatures, over the whole life cycle.

关 键 词：潮间带 壳体氧同位素 季节变化 

分 类 号：P67[天文地球—海洋地质]