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Category Text Publication
Reference Category Journals
DOI 10.1007/s10661-013-3247-7
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Title (Primary) Biogeochemical patterns in a river network along a land use gradient
Author Kamjunke, N.; Büttner, O.; Jäger, C.G.; Marcus, H.; von Tümpling, W. ORCID logo ; Halbedel, S.; Norf, H.; Brauns, M.; Baborowski, M.; Wild, R.; Borchardt, D.; Weitere, M.
Source Titel Environmental Monitoring and Assessment
Year 2013
Volume 185
Issue 11
Page From 9221
Page To 9236
Language englisch
Keywords TERENO; Land use; Nutrients; Heavy metals; DOC; Bode
UFZ wide themes TERENO; RU2;

The Bode catchment (Germany) shows strong land use gradients from forested parts of the National Park (23 % of total land cover) to agricultural (70 %) and urbanised areas (7 %). It is part of the Terrestrial Environmental Observatories of the German Helmholtz association. We performed a biogeochemical analysis of the entire river network. Surface water was sampled at 21 headwaters and at ten downstream sites, before (in early spring) and during the growing season (in late summer). Many parameters showed lower concentrations in headwaters than in downstream reaches, among them nutrients (ammonium, nitrate and phosphorus), dissolved copper and seston dry mass. Nitrate and phosphorus concentrations were positively related to the proportion of agricultural area within the catchment. Punctual anthropogenic loads affected some parameters such as chloride and arsenic. Chlorophyll a concentration and total phosphorus in surface waters were positively related. The concentration of dissolved organic carbon (DOC) was higher in summer than in spring, whereas the molecular size of DOC was lower in summer. The specific UV absorption at 254 nm, indicating the content of humic substances, was higher in headwaters than in downstream reaches and was positively related to the proportion of forest within the catchment. CO2 oversaturation of the water was higher downstream compared with headwaters and was higher in summer than in spring. It was correlated negatively with oxygen saturation and positively with DOC concentration but negatively with DOC quality (molecular size and humic content). A principle component analysis clearly separated the effects of site (44 %) and season (15 %), demonstrating the strong effect of land use on biogeochemical parameters.

Persistent UFZ Identifier
Kamjunke, N., Büttner, O., Jäger, C.G., Marcus, H., von Tümpling, W., Halbedel, S., Norf, H., Brauns, M., Baborowski, M., Wild, R., Borchardt, D., Weitere, M. (2013):
Biogeochemical patterns in a river network along a land use gradient
Environ. Monit. Assess. 185 (11), 9221 - 9236 10.1007/s10661-013-3247-7