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引用本文:马燕,王苏民.内蒙岱海近400年来的硅藻植物群及其古环境意义.湖泊科学,1992,4(2):19-24. DOI:10.18307/1992.0203
Ma Yan,Wang Sumin.The recent 400-year diatom history of Daihai Lake, innermongolia with additional reference to its paleoenvironmental significance. J. Lake Sci.1992,4(2):19-24. DOI:10.18307/1992.0203
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内蒙岱海近400年来的硅藻植物群及其古环境意义
马燕, 王苏民
中国科学院南京地理与湖泊研究所, 南京210008
摘要:
岱海近400年来的硅藻植物群可划分为3个组合:①Epithemia-Cymbella组合(1596-1636、1696-1836及1876-1946年),反映了温水-浅水-贫营养环境;②Melosira islandica-Fragilaria组合(1666-1696与1836-1876年间),代表了冷水-较浅水-贫营养环境;③Melosira granulata及其变种var.angustissima-Diploneis elliptica(1966年以来),反映了温水-浅水-富营养环境。1636-1666与1946-1966年间岱海中硅藻保存得很少,分别与气候寒冷而使硅藻难以生存与湖水动荡对硅藻保存不利有关。
关键词:  硅藻植物群  岱海古环境
DOI:10.18307/1992.0203
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The recent 400-year diatom history of Daihai Lake, innermongolia with additional reference to its paleoenvironmental significance
Ma Yan, Wang Sumin
Nanjing Institute of Geography and Limnology Academia Sinica Nanjing 210008
Abstract:
Diatoms were identified and counted in a core of 78 cm long, from which eight phases were recognized.In 1596-1636, 1696.1836 and 1876-1946,Daihai Lake supported an Epithemia/Cymbella assemblage, indicating a shallow water environment.In the two intervals of the three periods mentioned above (1666-1696 and 1836-1876), occurred a Melosira islandica/Fragilaria assemblage comparable to that in modern arctic and glacial moraine lakes.This is surely attributed to the heyday and the last oscillation of the Little Ice Age.During 1636-1666 and 1946-1966, the diatoms were too rare to be counted.Since 1966.the lake has been dominated by Melosira granulata/var.angustissimas Diplanets elliptica and Fragilaria spp.This may be due to the slightly riiesotrophic water, the warmer climate and the disturbance of human beings.
Key words:  diatoms  Daihai Lake  paleoenvironment
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