Vertical and lateral distribution of Foraminifera and Ostracoda in the East Frisian Wadden Sea – developing a transfer function for relative sea-level change

IF 1.2 4区 地球科学 Q2 GEOLOGY
Juliane Scheder, P. Frenzel, Friederike Bungenstock, M. Engel, H. Brückner, A. Pint
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引用次数: 10

Abstract

In light of rising sea levels and increased storm surge hazards, detailed information on relative sea-level (RSL) histories and local controlling mechanisms is required to support future projections and to better prepare for future coastal-protection challenges. This study contributes to deciphering Holocene RSL changes at the German North Sea coast in high resolution by developing a transfer function for RSL change. Recent associations of Foraminifera and Ostracoda from low intertidal to supratidal settings of the barrier island of Spiekeroog in combination with environmental parameters (granulometry, C/N, TOC, salinity) were investigated and quantified in elevation steps of 15 cm in order to generate a first transfer function (TF) of Holocene RSL change. In a future step, the TF can be applied to the stratigraphic record. Our data show a clear vertical zonation of foraminifer and ostracod taxa between the middle salt marsh and the tidal flat with very few individuals in the sand flat area, suggesting removal by the tidal current or poor preservation. Multivariate statistics identify the elevation, i.e. the inundation frequency, as main driving factor. The smallest vertical error (49 cm) is associated with an entirely new approach of combining Foraminifera and Ostracoda for a TF. Advantages of the TF over classical RSL indicators such as basal and intercalated peat – beside the relatively narrow indicative meaning – include the possible application to a wide range of intertidal facies and that it does not depend on compaction-prone peat.
东弗里斯兰瓦登海有孔虫和介形虫的垂直和横向分布——建立相对海平面变化的传递函数
鉴于海平面上升和风暴潮危害增加,需要有关相对海平面(RSL)历史和地方控制机制的详细信息,以支持未来的预测,并更好地为未来的海岸保护挑战做好准备。本研究通过建立RSL变化的传递函数,为德国北海海岸全新世RSL变化的高分辨率解译做出了贡献。结合环境参数(粒度、C/N、TOC、盐度),对斯皮克鲁格堰洲岛从低潮间带到潮上环境中有孔虫和介形虫的近期关联进行了研究和量化,以获得全新世RSL变化的第一传递函数(TF)。在未来的步骤中,TF可以应用于地层记录。有孔虫和介形虫类群在中盐沼和潮滩之间有明显的垂直分带,而沙滩地区的个体很少,可能是由于潮流的迁移或保存不良。多元统计表明,高程即淹没频率是主要驱动因素。最小的垂直误差(49 cm)与一种全新的结合有孔虫和介形虫的TF方法有关。相对于经典的RSL指标,如基底泥炭和插层泥炭的优势——除了相对狭窄的指示意义——包括可能适用于广泛的潮间带相,而且它不依赖于容易压实的泥炭。
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来源期刊
Geologica Belgica
Geologica Belgica 地学-地质学
CiteScore
4.70
自引率
27.80%
发文量
8
审稿时长
>12 weeks
期刊介绍: Geologica Belgica is a Belgian journal that welcomes papers concerning all aspects of the earth sciences, with a particular emphasis on the regional geology of Belgium, North West Europe and central Africa. Papers not dedicated to the geology of Belgium, North West Europe and central Africa are only accepted when one of the authors is linked to a Belgian University or Institution. Thematic issues are highly appreciated. In this case, guest editors take in charge the selection of the manuscripts and the subject of the papers can be enlarged. The journal is in open access. Submitted manuscripts should be concise, presenting material not previously published. The journal also encourages the publication of papers from Belgian junior authors. Short letters are accepted. Papers written in English are preferred. Each mansucript will be reviewed by at least two reviewers.
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