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Lookup NU author(s): Dr Annemarie Clarke
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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.
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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