Holocene history of Lake Soldatskoje (Kola Peninsula, Russia) inferred from sedimentary diatom assemblages
Holocene history of Lake Soldatskoje (Kola Peninsula, Russia) inferred from sedimentary diatom assemblages
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从沉积硅藻组合推断索尔达斯科耶湖（俄罗斯科拉半岛）的全新世历史
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发表时间：
2002
期刊：
影响因子：
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通讯作者：
T. Kauppila
中科院分区：
文献类型：
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作者：
T. Grönlund;T. Kauppila
Soldatskoje湖是位于科拉半岛北部沿海地区的一个小型冻原湖泊，周围环绕着许多考古居住遗址，研究人员对该湖的沉积物岩心进行了硅藻物种分析。岩心覆盖了整个全新世，即10000放射性碳年。硅藻的记录与早些时候在俄罗斯北部冻土带湖泊和北极湖泊进行的研究有相似之处。其中Fragilaria属占主导地位，其他许多北极湖泊典型的小型底栖、北欧冷水硅藻种类也很常见，包括Achnanthes minutissima k<e:1> tzing、A. pusilla (Grunow) De Toni、Cyclotella tripartita h<s:1> kansson和Navicula absoluta Hustedt。采用多变量排序来表征硅藻区系的变化。以硅藻为基础的pH值和总磷推断表明，湖泊的酸性逐渐增强，营养物逐渐减少。Soldatskoje湖4000 ~ 5500 14C yr BP硅藻地层的扰动可能与人类活动有关。
A sediment core from Lake Soldatskoje, a small tundra lake located in the northern coastal area of the Kola Peninsula and surrounded by numerous archaeological dwelling sites, was analysed for diatom species. The core covers the entire Holocene, i.e. 10000 radiocarbon years. The diatom record has similarities with studies made earlier from tundra lakes of northern Russia and from Arctic lakes in general. The genus Fragilaria was dominant and many other small, benthic, nordic, cold‐water diatom species typical of Arctic lakes were common, including Achnanthes minutissima Kützing, A. pusilla (Grunow) De Toni, Cyclotella tripartita Håkansson and Navicula absoluta Hustedt. Multivariable ordinations were used to characterize the changes in the diatom flora. Diatom‐based pH and total phosphorus inferences indicate that the lake has become progressively more acidic and poorer in nutrients. Disturbances in the diatom stratigraphy of Lake Soldatskoje around 4000–5500 14C yr BP may be related to human activity.