海洋藻类生物标志物单体氢同位素与表层海水盐度关系研究进展与启示  

Relationship Between Compound-SpecificδD of Marine Algae Biomarkers and Surface Seawater Salinity and Its Implication for Paleoceanography Reconstruction

作　　者：贾佳源 贺娟[1] 韦兵兵[1] 贾国东[1] 李丽[1] JIA Jiayuan;HE Juan;WEI Bingbing;JIA Guodong;LI Li(State Key Laboratory of Marine Geology,Tongji University,Shanghai 200092,China)

机构地区：[1]同济大学海洋地质国家重点实验室,上海200092

出　　处：《地球科学进展》2022年第4期392-406,共15页Advances in Earth Science

基　　金：国家自然科学基金项目“长江口外藻类生物标志化合物氢同位素与海洋盐度关系的研究”(编号:41776049)和“晚渐新世—中中新世东亚低纬区降水演化历史及其全球影响”(编号:41876042)资助.

摘　　要：生物标志物稳定氢同位素组成包含了重要的环境信息,以长链烯酮、甲藻甾醇和中链脂肪酸为代表的生物标志物氢同位素δD值以及氢同位素分馏被越来越多地应用到古海洋盐度重建的工作中。近20年的研究表明,海洋藻类生物标志物δD值受到诸多因素控制,如盐度、种属、温度和光照等。重点介绍表层海水盐度对海洋藻类脂质δD值的影响,通过汇总培养实验以及实地研究中的藻类生标δD值与盐度的关系,以及已有的藻类生标δD值重建古盐度的应用,提出使用该方法重建古表层海水盐度时存在的问题和需要关注的重点。希望通过研究可以更好地理解藻类生标δD值的应用潜力,为生标单体氢同位素研究提供更准确详尽的信息。Compound-specific D/H ratios of lipid biomarkers contain valuable environmental information.TheδD values of biomarkers represented by long-chain alkenones,dinosterols,and fatty acids have been increasingly applied to reconstruct paleo-Sea-Surface Salinity(SSS).However,studies over the past two decades have shown that theδD of marine algae biomarkers is sensitive to many factors,such as salinity,species,temperature,and light intensity.Here,we focused on the impact of SSS on theδD of marine algae lipids and summarized the relationships between lipidδD and salinity from culture experiments and field studies.Then,based on the successful reconstruction of paleo-salinity with lipidδD,we put forward the problems that need to be addressed when applying it as a paleo-SSS proxy.It is hoped tha t this study will help us better understand the application potential of lipidδD and provide more accurate and detailed information forδD research.

关 键 词：生物标志物 稳定氢同位素 氢同位素分馏 控制因素 古表层海水盐度 

分 类 号：P736.4[天文地球—海洋地质]