Details zur Publikation

Kategorie Textpublikation
Referenztyp Zeitschriften
DOI 10.1029/2022WR034010
Lizenz creative commons licence
Titel (primär) Composition of photosynthetic gas bubbles from submerged macrophytes
Autor Shikhani, M.; Reinschke, L.; Aurich, P.; Waldemer, C.; Koschorreck, M.; Boehrer, B.
Quelle Water Resources Research
Erscheinungsjahr 2024
Department SEEFO
Band/Volume 60
Heft 1
Seite von e2022WR034010
Sprache englisch
Topic T5 Future Landscapes
Keywords ebullition; oxygen; bubble formation; bubble composition; dissolved gases
Abstract Dissolved oxygen plays a central role for all organisms dwelling in water. However, the flux of oxygen by ebullition has not received much attention in environmental science. For a better quantitative understanding of the oxygen flux due to ebullition, we conducted a series of laboratory experiments, where we forced macrophytes to produce photosynthetic gas bubbles. Raising the CO2 concentration in the water greatly increased bubble formation. Depth was varied to compare the results with theoretically predicted composition of photosynthetic bubbles forming at minimum required gas pressure. Oxygen concentrations lay between this theoretical line as lower boundary (ca. 21% O2 at 0.3 m depth and 45% of O2 at 4.5 m) and 45% of oxygen as the purely empirical upper limit for all depths. As a consequence, no bubble formation was observed at depths below 4.5 m.
dauerhafte UFZ-Verlinkung
Shikhani, M., Reinschke, L., Aurich, P., Waldemer, C., Koschorreck, M., Boehrer, B. (2024):
Composition of photosynthetic gas bubbles from submerged macrophytes
Water Resour. Res. 60 (1), e2022WR034010 10.1029/2022WR034010