Publication Details |
| Category | Text Publication |
| Reference Category | Book chapters |
| Title (Primary) | Cascading effects of eutrophication on intragravel life stages of European Grayling (Thymallus thymallus L.) |
| Title (Secondary) | The ecology of the hyporheic zone of running waters. Patterns, processes and bottleneck functions |
| Author | Hübner, D.; Borchardt, D.; Fischer, J. |
| Publisher | Borchardt, D.; Pusch, M. |
| Source Titel | Advances in Limnology |
| Year | 2009 |
| Department | ASAM |
| Volume | 61 |
| Page From | 205 |
| Page To | 224 |
| Language | englisch |
| UFZ inventory | Magdeburg, Bibliothek, 00377539, 10-2484 MA : Z Magdeburg, Bibliothek, 00401333, 11-0307 MA : Z |
| Abstract | Cultural cutrophication of running waters is known to be associated with benthic algal proliferation, clogging of river beds and degradation of water quality that can lead to fish kills. The present study investigates the changes of interstitial water quality in relation to a treated wastewater effluent and their effects on the survival of grayling (Thymallus thymallus L.) eggs and larvae. Grayling eggs were buried into the sediment at three sites with different nutrient load. The characteristics of the interstitial water (oxygen, pH, nitrates, nitrites, ammonia, phosphate and conductivity) were assessed at different times and related to the embryonic and larval development of the grayling. The mortality rates of the eggs and larvae downstream the wastewater treatment plant (WWTP) were significantly higher than those of the control field. None of the eggs placed in the WWTP effluent plume survived until the period of emergence. Critical parameters for the survival of the early life stages were the ammonia concentration and the pH values in the sediment pore water downstream of the WWTP. The maximum ammonia concentrations rose up to 95 μg/l NH3-N and the pH reached values up to 9.9. The dissolved oxygen concentration varied between 8.7 mg/l and 13.3 mg/l at daytime. The results suggest that cultural eutrophication may be a limiting factor for the survival of the early life stages of the grayling. The temporal coincidence of alevins and spring algal bloom has been identified to be of critical importance. |
| Persistent UFZ Identifier | https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=283 |
| Hübner, D., Borchardt, D., Fischer, J. (2009): Cascading effects of eutrophication on intragravel life stages of European Grayling (Thymallus thymallus L.) 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. 205 - 224 |
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