Quantitative relationship between surface sedimentary diatoms and water depth in North-Central Bohai Bay,China  

作　　者：Zhi-wen Shang Jian-fen Li Holger Freund Pei-xin Shi Hong Wang 

机构地区：[1]Tianjin Centre,China Geological Survey,Ministry of Natural Resources,Tianjin 300170,China [2]Key Laboratory of Coast Geo-environment,China Geological Survey,Ministry of Natural Resources,Tianjin 300170,China [3]Institute of Chemistry and Biology of the Marine Environment,Carl von Ossietzky University of Oldenburg,Oldenburg 26111,Germany

出　　处：《China Geology》2023年第1期61-69,共9页中国地质（英文）

基　　金：supported by the National Natural Science Foundation of China Youth Fund(41806109);the project of the China Geological Survey(DD20189506)。

摘　　要：To study the quantitative relationship between surface sedimentary diatoms and water depth,67 surface samples were collected for diatom analysis on eight profiles with water depth variation from the muddy intertidal zone to the shallow sea area in North-Central Bohai Bay,China.The results showed that the distribution of diatoms changed significantly in response to the change in water depth.Furthermore,the quantitative relationship between the distribution of dominant diatom species,their assemblages,and the water depth was established.The water depth optima for seven dominant species such as Cyclotella striata/stylorum,Paralia sulcata,and Coscinodiscus perforatus and the water depth indication range of seven diatom assemblages were obtained in the study area above the water depth(elevation)of-10 m.The quantitative relationship between surface sedimentary diatoms and water depth provides a proxy index for diatom-paleo-water depth reconstruction in the strata in Bohai Bay,China.

关 键 词：Diatom Surficial sediments Water depth(elevation) Quantitative relationship Sea level change Paleo-environment change Marine geological survey engineering North-central Bohai Bay China 

分 类 号：P53[天文地球—古生物学与地层学]