泥炭分解在模式泥潭中的作用:来自瑞士阿尔卑斯中部的案例研究

IF 4.4 2区生物学 Q1 PLANT SCIENCES

Preslia Pub Date : 2013-08-29 DOI:10.7892/BORIS.38708

B. Ammann, H. E. Wright, V. Stefanova, J. Leeuwen, W. O. Knaap, D. Colombaroli, W. Tinner

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引用次数: 10

摘要

泥炭地的形成涉及许多水文、植物学、宏观和微气候过程。海拔2336米的La Grande Tsa可能是瑞士阿尔卑斯山脉中部最高的沼泽，它的模式是独一无二的。在5个储层中，有2个储层在基底泥炭与上覆泥炭的接触带存在不整合，这是基于放射性碳测年的深度年龄模型。脊状岩心和池状岩心的孢粉地层证实了接触带存在不整合。我们得出结论，泥炭的分解导致了池的加深。事实上，两个池的不整合和脊核的不整合都在青铜时代，这表明它们是由沼泽外部事件造成的。我们假设早期的过度放牧导致人为降低树带线，从而导致叶面积指数和蒸散量的减少，并导致更高的水位，从而形成水池。

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The role of peat decomposition in patterned mires: a case study from the central Swiss Alps

A number of hydrological, botanical, macro- and micro-climatological processes are involved in the formation of patterned peatlands. La Grande Tsa at 2336 m a.s.l. is probably the highest bog in the central Swiss Alps and is unique in its pattern. In two of five pools there is in the contact zone between the basal peat and the overlying gyttja an unconformity in the depth-age models based on radiocarbon dates. Palynostratigraphies of cores from a ridge and a pool confirm the occurrence of an unconformity in the contact zone. We conclude that deepening of the pools results from decomposition of peat. The fact that the dated unconformities in the two pools and the unconformity in the ridge-core all fall within the Bronze Age suggest they were caused by events external to the bog. We hypothesize that early transhumance resulted in anthropogenic lowering of the timberline, which resulted in a reduction in the leaf-area index and evapotranspiration, and in higher water levels and thus pool formation.

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来源期刊

Preslia 生物-植物科学

CiteScore

5.20

自引率

29.40%

发文量

审稿时长

>12 weeks

期刊介绍： Preslia is a peer-reviewed scientific journal publishing original research papers on plant systematics, morphology, phytogeography, ecology and vegetation science, with a geographical focus on central Europe. The journal was founded in 1914 and named in honour of brothers Jan Svatopluk Presl (1791–1849) and Karel Bořivoj Presl (1794–1852), outstanding Bohemian botanists. It is published quarterly by the Czech Botanical Society.