Details zur Publikation |
| Kategorie | Textpublikation |
| Referenztyp | Zeitschriften |
| DOI | 10.1016/j.earscirev.2021.103724 |
Lizenz  |
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| Titel (primär) | Towards an improved understanding of biogeochemical processes across surface-groundwater interactions in intermittent rivers and ephemeral streams |
| Autor | Gómez-Gener, L.; Siebers, A.R.; Arce, M.I.; Arnon, S.; Bernal, S.; Bolpagni, R.; Datry, T.; Gionchetta, G.; Grossart, H.-P.; Mendoza-Lera, C.; Pohl, V.; Risse-Buhl, U.; Shumilova, O.; Tzoraki, O.; von Schiller, D.; Weigand, A.; Weigelhofer, G.; Zak, D.; Zoppini, A. |
| Quelle | Earth-Science Reviews |
| Erscheinungsjahr | 2021 |
| Department | FLOEK |
| Band/Volume | 220 |
| Seite von | art. 103724 |
| Sprache | englisch |
| Topic | T5 Future Landscapes |
| Supplements | https://ars.els-cdn.com/content/image/1-s2.0-S0012825221002257-mmc1.docx https://ars.els-cdn.com/content/image/1-s2.0-S0012825221002257-mmc2.xlsx |
| Keywords | Intermittency; Non-perennial; Watercourses; Stream network; Ecosystem ecology; Carbon; Nitrogen; Phosphorus |
| Abstract | Surface-groundwater interactions in intermittent rivers and
ephemeral streams (IRES), waterways which do not flow year-round, are spatially
and temporally dynamic because of alternations between flowing, non-flowing and
dry hydrological states. Interactions between surface and groundwater often
create mixing zones with distinct redox gradients, potentially driving high
rates of carbon and nutrient cycling. Yet a complete understanding of how
underlying biogeochemical processes across surface-groundwater flowpaths in
IRES differ among various hydrological states remains elusive. Here, we present
a conceptual framework relating spatial and temporal hydrological variability
in surface water-groundwater interactions to biogeochemical processing hotspots
in IRES. We combine a review of theIRES biogeochemistry literature with
concepts of IRES hydrogeomorphology to: (i) outline common distinctions among
hydrological states in IRES; (ii) use these distinctions, together with
considerations of carbon, nitrogen, and phosphorus cycles within IRES, to predict
the relative potential for biogeochemical processing across different
reach-scale processing zones (flowing water, fragmented pools, hyporheic zones,
groundwater, and emerged sediments); and (iii) explore the potential spatial
and temporal variability of carbon and nutrient biogeochemical processing
across entire IRES networks. Our approach estimates the greatest reach-scale
potential for biogeochemical processing when IRES reaches are fragmented into
isolated surface water pools, and highlights the potential of relatively
understudied processing zones, such as emerged sediments. Furthermore,
biogeochemical processing in fluvial networks dominated by IRES is likely more
temporally than spatially variable. We conclude that biogeochemical research in
IRES would benefit from focusing on interactions between different nutrient
cycles, surface-groundwater interactions in non-flowing states, and
consideration of fluvial network architecture. Our conceptual framework
outlines opportunities to advance studies and expand understanding of
biogeochemistry in IRES. |
| dauerhafte UFZ-Verlinkung | https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=24882 |
| Gómez-Gener, L., Siebers, A.R., Arce, M.I., Arnon, S., Bernal, S., Bolpagni, R., Datry, T., Gionchetta, G., Grossart, H.-P., Mendoza-Lera, C., Pohl, V., Risse-Buhl, U., Shumilova, O., Tzoraki, O., von Schiller, D., Weigand, A., Weigelhofer, G., Zak, D., Zoppini, A. (2021): Towards an improved understanding of biogeochemical processes across surface-groundwater interactions in intermittent rivers and ephemeral streams Earth-Sci. Rev. 220 , art. 103724 10.1016/j.earscirev.2021.103724 |
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