Publication Details |
Category | Text Publication |
Reference Category | Journals |
DOI | 10.1002/eco.1615 |
Document | Shareable Link |
Title (Primary) | Nighttime and daytime respiration in a headwater stream |
Author | González-Pinzón, R.; Peipoch, M.; Haggerty, R.; Martí, E.; Fleckenstein, J.H. |
Source Titel | Ecohydrology |
Year | 2016 |
Department | HDG |
Volume | 9 |
Issue | 1 |
Page From | 93 |
Page To | 100 |
Language | englisch |
Keywords | community respiration; resazurin; smart tracers; diel fluctuations; headwater stream; hyporheic zone; stream temperature; stream metabolism |
UFZ wide themes | RU2; |
Abstract | We investigated changes in respiration across nighttime and daytime in a headwater stream. For this, we conducted consecutive nighttime and daytime experiments injecting the bioreactive tracer resazurin in two reaches with different riparian canopy densities (different levels of photosynthetically active radiation) to compare respiration rate coefficients. We found that even though stream water temperatures measured above the streambed at day and night (half-day timescale) were different within each reach and across reaches (95% confidence level), apparent respiration rate coefficients were not different across nighttime and daytime conditions (95% confidence level). A likely explanation for this is that the bulk of stream respiration takes place in the hyporheic zone, where diel fluctuations of stream temperature and photosynthetically active radiation are considerably attenuated and where temperature is not measured in routine investigations of stream metabolism. Our results suggest that community respiration in headwater streams may not need to be ‘corrected’ for temperature between daytime and nighttime, even though instantaneous changes in respiration are expected to occur from a pure biological perspective. |
Persistent UFZ Identifier | https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=16012 |
González-Pinzón, R., Peipoch, M., Haggerty, R., Martí, E., Fleckenstein, J.H. (2016): Nighttime and daytime respiration in a headwater stream Ecohydrology 9 (1), 93 - 100 10.1002/eco.1615 |