Vegetation patterns, recent pollen deposition and distribution of non‐pollen palynomorphs in a polygon mire near Chokurdakh (NE Yakutia, NE Siberia)
Vegetation patterns, recent pollen deposition and distribution of non‐pollen palynomorphs in a polygon mire near Chokurdakh (NE Yakutia, NE Siberia)
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乔库达赫（雅库特东北部、西伯利亚东北部）附近多边形泥沼中的植被格局、近期花粉沉积和非花粉孢粉型的分布
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发表时间：
2009
期刊：
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通讯作者：
M. Theuerkauf
中科院分区：
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作者：
Pim de Klerk;Norman Donner;H. Joosten;N. Karpov;M. Minke;N. Seifert;M. Theuerkauf
在西伯利亚东北部的一个多边形沼泽中，在31 × 31个1 m2的样方（植被）和沿着1 m间隔的样带（孢粉）中研究了植被和孢粉的细尺度分布格局。 花粉和非花粉-孢粉形的内容清楚地反映了多边形脊和中心之间的差异。然而，对于大多数单一的花粉类型，没有明确的关系，与实际的植物丰度和分布存在。高花粉值仅限于花粉源附近，这是由于植被高度较低。对于几个植物类群，高花粉值被发现仅限于特定的植物标本的人口。高值的花粉归因于分类群目前没有在相关的情节表明，采样的苔藓包含几年的花粉信号。桦产生两种形态上明显不同的花粉类型。所选非花粉孢粉形物的分布与微地形、水分状况和/或营养条件相关。该研究表明，来自北极泥炭地的单个古剖面不应被过度解释其古生态价值。当地的植被类型和立地条件，但是，可以准确地重建的总组合和组合发生的特定的孢粉类型。
Fine‐scaled distribution patterns of vegetation and palynomorphs in a polygon mire in NE Siberia were studied in 31 × 31 plots of 1 m2 (vegetation) and along a transect at intervals of 1 m (palynomorphs). Pollen and non‐pollen‐palynomorph contents clearly reflect differences between polygon ridges and centres. For most single pollen types, however, no unambiguous relation with actual plant abundances and distribution exists. High pollen values are restricted to the immediate vicinity of the pollen sources, which is attributed to the low height of the vegetation. For several plant taxa, high pollen values were found to be restricted to particular plant specimens in the population. High values of pollen ascribed to taxa currently absent at the relevant plot show that the sampled mosses contain a pollen signal of several years. Betula exilis produces two morphologically clearly distinct pollen types. The distribution of selected non‐pollen palynomorphs correlates to microrelief, moisture regime and/or trophic conditions. The study shows that single palaeo‐sections from arctic peatlands should not be over‐interpreted with respect to their palaeoecological value. Local vegetation types and site conditions, however, can be accurately reconstructed from the total assemblages and from combined occurrences of specific palynomorph types.