Details zur Publikation |
Kategorie | Textpublikation |
Referenztyp | Buchkapitel |
Titel (primär) | Vertical gradients of nutrients in the hyporheic zone of the River Lahn (Germany): relevance of surface versus hyporheic conversion processes |
Titel (sekundär) | The ecology of the hyporheic zone of running waters. Patterns, processes and bottleneck functions |
Autor | Fischer, J.; Borchardt, D.; Ingendahl, D.; Ibisch, R.B.; Sänger, N.; Wawra, B.; Lenk, M. |
Herausgeber | Borchardt, D.; Pusch, M. |
Quelle | Advances in Limnology |
Erscheinungsjahr | 2009 |
Department | ASAM |
Band/Volume | 61 |
Seite von | 105 |
Seite bis | 118 |
Sprache | englisch |
UFZ Bestand | Magdeburg, Bibliothek, 00377539, 10-2484 MA : Z Magdeburg, Bibliothek, 00401333, 11-0307 MA : Z |
Abstract | Hyporheic and surface-bound nutrient retention (NH4-N, NO3-N, TP) was investigated at a riffle-pool sequence of a nutrient-enriched and wastewater-affected 5th order gravel stream in Germany (River Lahn). A comparative analysis of injected fluoresceine as a conservative tracer and reactive solutes resulting from a wastewater effluent were used to separate hydraulic exchange phenomena from biogeochemical transformations in four sediment depths (0-5, 5-15, 15-25 and 25-45 cm). Exchange corrected vertical gradients of the surface water in two infiltration zones showed that 65 % of the ammonium concentration and 20 % of the total phosphorus concentration were removed at the sediment-water interface (sediment depth 0-5 cm), whereas only a slight and insignificant nitrate surplus occurred at the same depth. It became evident that biological uptake respectively coupled nitrification and denitrification within the well-developed periphyton of the River Lahn exceeded hyporheic nitrification. The most active layer of the hyporheic zone was between 5-15 cm, which is a depth characterized by intensive small-scale exchange processes (e.g. an additional reduction of ammonium (20%) and TP (4.5 %)). Net retention of both parameters decreased to almost 0 % in layers deeper than 25 cm. Nitrate showed no significant retention at all. We conclude that the River Lahn has a large but inactive potential for hyporheic nutrient removal which is superimposed by periphyton nutrient cycling. |
dauerhafte UFZ-Verlinkung | https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=164 |
Fischer, J., Borchardt, D., Ingendahl, D., Ibisch, R.B., Sänger, N., Wawra, B., Lenk, M. (2009): Vertical gradients of nutrients in the hyporheic zone of the River Lahn (Germany): relevance of surface versus hyporheic conversion processes In: Borchardt, D., Pusch, M. (eds.) The ecology of the hyporheic zone of running waters. Patterns, processes and bottleneck functions Advanc. Limnol. 61 Schweizerbart, Stuttgart, p. 105 - 118 |