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Reconstructing the salinity and environment of the Limfjord and Vejlerne nature reserve, Denmark, using a diatom model for brackish lakes and fjords

Lookup NU author(s): Dr Annemarie Clarke

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Abstract

Diatoms in surface sediments from a data set of 27 brackish lakes and nine fjords in Jutland, Denmark (range 0.2-31 g·L-1 total dissolved solids (TDS)), were analysed using multivariate methods to determine response to measured parameters (depth, total phosphorus (TP), total nitrogen (TN), TN/TP, salinity, water body type). Water body type, salinity, depth and TP together explained 25.3% of the variation in the diatom data and were all independently significant predictors. A diatom-salinity model (r 2jack = 0.887, root mean square error of prediction = 0.246 log salinity, g·L-1) was developed from the 36 sample training set and applied to fossil diatom assemblages in three sediment cores from the east Vejlerne wetland, Denmark, a nature reserve created after the damming of an embayment of the polyhaline Limfjord (∼26 g·L -1 TDS) in the late 19th century. The diatom-inferred salinity reconstructions reflect the known salinity history of the Limfjord and the freshwater-subsaline Vejlerne lakes, and appear sensitive to documented North Sea storms in the 16th and 17th centuries, which had major impacts on the brackish Limfjord herring fishery. Diatom-salinity models may be useful tools in long-term studies of coastal and estuarine areas to test hypotheses concerning aquatic resources and ecological, hydrographic, and cultural change. © 2004 NRC Canada.

Publication metadata

Author(s): Ryves DB, Clarke AL, Appleby PG, Amsinck SL, Jeppesen E, Landkildehus F, Anderson NJ

Publication type: Article

Publication status: Published

Journal: Canadian Journal of Fisheries and Aquatic Sciences

Year: 2004

Volume: 61

Issue: 10

Pages: 1988-2006

ISSN (print): 0706-652X

ISSN (electronic): 1205-7533

Publisher: NRC Research Press

URL: .http:/dx.doi.org/10.1139/F04-127

DOI: 10.1139/F04-127

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