Testate amoebae and environmental features of polygon tundra in the Indigirka lowland (East Siberia)

Testate amoebae and environmental features of polygon tundra in the Indigirka lowland (East Siberia)
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印迪吉尔卡低地(东西伯利亚)多边形苔原的有遗嘱变形虫和环境特征

DOI:
10.1007/s00300-013-1311-y
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发表时间:
2013
期刊:
影响因子:
1.7
通讯作者:
Herzschuh U
Herzschuh U
中科院分区:
环境科学与生态学3区
文献类型:
--
作者:
Bobrov AA;Wetterich S;Beermann F;Schneider A;Kokhanova L;Schirrmeister L;Pestryakova L;Herzschuh U

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多边形苔原是大片北极低地的特征。多边形内的微浮雕图案为有睾变形虫(甲壳动物)群落提供了差异化的栖息地。这项研究的目的是将多边形内的甲壳动物物种分布与环境设置联系起来。因此,在土壤学和土壤化学数据的背景下,研究了在低中心多边形内不同位置挖掘的四个冰冻土坑中的睾丸类动物,同时测量了一个夏季的地面温度和地面湿度。研究地点位于 Berelekh 河漫滩(东西伯利亚 Indigirka 低地)。环境数据集反映了沿着多边形边缘到中心横断面以及每个坑的不同层位的变化。甲壳类动物的物种分布主要受土壤湿度和 pH 值的控制。大多数已识别的睾类动物都是世界性的。首次描述了来自北极环境的八个物种。环境条件的差异是由多边形苔原的微地形控制的,在北极低地甲壳动物研究中必须考虑到这些差异,因为它们会影响物种组成和任何进一步的(古)生态解释。
Polygon tundra characterizes large areas of arctic lowlands. The micro-relief pattern within polygons offers differentiated habitats for testate amoeba (testacean) communities. The objective of this study was to relate testacean species distribution within a polygon to the environmental setting. Therefore, testaceans from four cryosol pits dug at different locations within a low-centered polygon were studied in the context of pedological and pedochemical data, while ground temperature and ground moisture were measured over one summer season. The study site is located on the Berelekh River floodplain (Indigirka lowland, East Siberia). The environmental data sets reflect variations along the rim-to-center transect of the polygon and in different horizons of each pit. The testacean species distribution is mainly controlled by the soil moisture regime and pH. Most of the identified testaceans are cosmopolitans; eight species are described from an arctic environment for the first time. Differences in environmental conditions are controlled by the micro-relief of polygon tundra and must be considered in arctic lowland testacean research because they bias species composition and any further (paleo-)ecological interpretation.
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