A Powerful Indicator for Quantitative Reconstruction of Ombrotrophic Mires Palaeohydrology: Advances in the Study of Fossil Testate Amoebae

详细信息   

• 责任者：Zhang Xinli (Resources Environmental Science Information Center of Chinese Academy of Sciences ; Lanzhou 730000 ; China) ; Jia Jihong
• 刊名：Marine Geology & Quaternary Geology
• 出版年：2008
• 卷期：28(2)
• 关键词：沼泽 ; marshes ; 原生动物门 ; Protozoa ; 气候 ; climate
• 页码：p.121-128
• 图表：3 illus., 65 refs.
• 分类号：1400
• issnNo：ISSN0256-1492
• isbnNo：CN37-1117/P

摘要

///According to chemical conditions, peatlands usually have three types:minerotrophic, ombrotrophic and transition. Nutrients of ombrotrophic mires mainly come from precipitation. Because surface water in the mires moves quite slowly, most of deposits remain their formative sets. There are a number of testate amoebae on ombrotrophic mires, which are single-celled organisms in which the cytoplasm is enclosed within an external shell. Studies of their ecology show that assemblages are principally determined by moisture status but are also influenced by nutrient status, especially by pH levels. Testate amoebae provide an additional technique and have ability to quantitatively reconstruct water table depths. The results indicate that testate amoebae are sensitive indicators for paleohydrology, and water table reconstructions from testate amoebae can provide a new source of palaeoclimate data for temperate oceanic regions with ombrotrophic mires.