摘要
大量的研究证实，赤潮与海水的富营养化有密切的关系。近年来，国内外一些学者通过分子地层学记录来探讨赤潮演变历史及其与富营养化的关系，希望找到赤潮演化与发展的科学依据。本文综述了甾醇、生物硅、色素、孢囊、同位素等指标在古赤潮及其相关古营养研究中的应用及研究动态与进展。甾醇是重要的藻类生物标志化合物，4-甲基甾醇及其衍生物可指示沟鞭藻的输入。孢囊可用来反映生物种群、表层海水营养和生产力水平。生物硅被用来指示硅藻生产力。色素可以很好地反映水体中富营养水平及生产力高低，颤藻黄素的升高被认为是湖泊人为富营养化的重要依据。利用C 、N 同位素组成的变化指示水体中营养状况的变化。
A lot of evidence has indicated that there is close relation between frequent occerrence of red tide and eutrophication. Reconstruction of historical red tide and eutrophication by using dated sedimentary cores is becoming one of the focus fields in the marine environmental science. In this paper, the auther introduces and outlines progress in the study on historical red tide and paleonutrient and application of some important proxies such as sterol, biogenic silica, pigment, cyst, isotope. Sterols are important algal biomarkers, and the occurrence of 4-methyl sterols in sediment can indicate the existence of dinoflagellate. Cyst can indicate algal species, nutrient condition and productivity. Biogenic silica is an indicator of diatom productivity. Pigments can indicate eutrophicatical condition and productivity. Carbon and nitrogen stable isotope are used as indicators of nutrient changes.
出处
《海洋通报》
CAS
CSCD
北大核心
2003年第6期63-70,共8页
Marine Science Bulletin
基金
浙江省自然科学基金 (No.401022)
国家海洋局海底科学重点实验室开放基金 (klsg2001-01) 资助
关键词
古生产力
古营养
甾醇
生物硅
色素
孢囊
Paleoproductivity
Paleonutrient
Sterol
Biogenic silica
Pigment
Cyst
