Effects of morphological changes on metal accumulation in a salt marsh sediment of the Skallingen peninsula, Denmark
Christiansen, C.; Bartholdy, J.; Kunzendorf, H. (2002). Effects of morphological changes on metal accumulation in a salt marsh sediment of the Skallingen peninsula, Denmark. Wetlands Ecol. Manag. 10: 11-23
In: Wetlands Ecology and Management. Springer: Den Haag; Dordrecht; Hingham, MA; Amsterdam. ISSN 0923-4861; e-ISSN 1572-9834, more
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| Authors | | Top |
- Christiansen, C.
- Bartholdy, J.
- Kunzendorf, H.
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| Abstract |
In 1931 a red-colored, sandy marker horizon was placed on the emerging Skallingen salt marsh. Sedimentation on top of the marker horizon since then shows two opposing tendencies. Coincident with salt marsh development the sediments display up to 1964 a fining upward sequence with an increasing content of organic matter. Since 1964 a nearby creek has meandered towards the sampling plot. Consequently, the sediments become coarser with a decreasing organic matter content. The morphological induced changes in sedimentary conditions strongly influence metal content in the sediments and thereby hide anthropogenic induced concentration variations. Thus, an apparently diminishing Zn content (per kg dry weight) since 1964 could indicate lesser load to the area. However, corrected for grain size effects there is an increasing content of Zn. Other metal concentrations (e.g. Cu) show a diminishing trend when corrected for grain size effects and therefore indicate a reduced anthropogenic induced load of these metals to the salt marsh. |
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