Distribution pattern and controls of biosedimentary facies in backbarrier tidal flats of the central Wadden Sea (North Sea)
- 27 December 2021
- journal article
- research article
- Published by Schweizerbart in Zeitschrift der Deutschen Gesellschaft für Geowissenschaften
- Vol. 172 (4), 409-428
- https://doi.org/10.1127/zdgg/2021/0248
Abstract
Facies analysis is a well-established tool in sedimentary geology, which allows the reconstruction of the depositional palaeoenvironment using sedimentological, ecological and geochemical proxies. Following an actualistic approach, we mapped the biosedimentary facies of a large backbarrier tidal flat system over a decade in the field covering four tidal basins with an area of 144 km(2). The spatial distribution of biosedimentary facies shows a complex pattern on a local scale, which superimposes the shore-normal energy gradient on a regional scale. The main controlling factors are hydrodynamic energy, the relative position to tidal channels, the duration of emergence, organism-sediment interaction and the presence of invasive species. Due to strongly fluctuating abundances of benthic organisms, the lateral extension of biosedimentary facies may differ significantly over the years. However, the grain size distribution reflects a more long-term equilibrium with the hydrodynamics of this coastal region. Additionally, we have documented a system shift of biogenic structures caused by the invasion of a non-native species, which functions as an ecosystem engineering species. Since we have focussed on tracemaking organisms, i.e., polychaetes and shell-bearing molluscs combined with abiotic parameters, the biosedimentary facies pattern of our study can be transferred into multidimensional facies analyses of sedimentary rocks deposited along ancient tidal coasts.Keywords
This publication has 25 references indexed in Scilit:
- Trends in high sea levels of German North Sea gauges compared to regional mean sea level changesContinental Shelf Research, 2013
- Mapping facies distributions on modern carbonate platforms through integration of multispectral Landsat data, statistics-based unsupervised classifications, and surface sediment dataAAPG Bulletin, 2010
- Context-dependent Impacts of a Non-native Ecosystem Engineer, the Pacific Oyster Crassostrea gigasIntegrative and Comparative Biology, 2010
- High-resolution facies analysis of a Lower Devonian deltaic marine-terrestrial transition (Nellenkopfchen Formation, Rheinisches Schiefergebirge, Germany): implications for small-scale fluctuations of coastal environmentsNeues Jahrbuch für Geologie und Paläontologie - Abhandlungen, 2010
- The Holocene relative sea-level curve for the tidal basin of the barrier island Langeoog, German Bight, Southern North SeaGlobal and Planetary Change, 2009
- Bioturbation structures of polychaetes in modern shallow marine environments and their analogues to Chondrites group tracesPalaeogeography, Palaeoclimatology, Palaeoecology, 2007
- A new Holocene sea-level curve for the southern North SeaBoreas, 2007
- Wind influence on tidal flat sediment dynamics: Field investigations in the Ho Bugt, Danish Wadden SeaMarine Geology, 2006
- Late Holocene stratigraphic evolution of a back-barrier tidal basin in the East Frisian Wadden Sea, southern North Sea: transgressive deposition and its preservation potentialFacies, 2006
- On the sensitivity of the sedimentary system in the East Frisian Wadden Sea to sea-level rise and wave-induced bed shear stressOcean Dynamics, 2006