Details zur Publikation |
Kategorie | Textpublikation |
Referenztyp | Buchkapitel |
Titel (primär) | Direct measurement of respiration and decolmation activity of hyporheic meiofauna: first results from a new approach using anesthetizing substances |
Titel (sekundär) | The ecology of the hyporheic zone of running waters. Patterns, processes and bottleneck functions |
Autor | Schmidt, J.; Borchardt, D.; Ibisch, R.B.; Bohle, H.-W. |
Herausgeber | Borchardt, D.; Pusch, M. |
Quelle | Advances in Limnology |
Erscheinungsjahr | 2009 |
Department | ASAM |
Band/Volume | 61 |
Seite von | 185 |
Seite bis | 203 |
Sprache | englisch |
UFZ Bestand | Magdeburg, Bibliothek, 00377539, 10-2484 MA : Z Magdeburg, Bibliothek, 00401333, 11-0307 MA : Z |
Abstract | In this study, we present a new experimental approach using anesthetizing substances, which allows (1) to estimate the effects of interstitial faunal assemblages on decolmation processes in the hyporheic zone and (2) to measure their contributions to interstitial sediment metabolism. The use of narcotics in respiration measurements and flow-through experiments using sediment-filled tubes previously exposed in river sediments are suitable for estimations of both parameters. The method has several advantages compared to indirect measurements and calculations used so far. The first results of our experiments indicate a higher contribution of the interstitial fauna to the total metabolism of the hyporheic zone than previously known (about 45 % of the total hyporheic community respiration (HCR)). Sediment permeability of experimental tubes with anesthetized fauna decreased by 49 % and the respiration rate of these tubes increased to 121 %, whereas tubes with active fauna kept a more or less stable level. These results give (1) the first measurable indication that bioturbation and grazing activities by meiofauna influence stream ecosystem processes in a predictable manner, (2) information on the extent of this influence, and (3) delivered new cues on the functional role of interstitial fauna for the self-cleaning of polluted river sections. |
dauerhafte UFZ-Verlinkung | https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=565 |
Schmidt, J., Borchardt, D., Ibisch, R.B., Bohle, H.-W. (2009): Direct measurement of respiration and decolmation activity of hyporheic meiofauna: first results from a new approach using anesthetizing substances 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. 185 - 203 |