Publication Details |
| Category | Text Publication |
| Reference Category | Journals |
| DOI | 10.1111/1758-2229.70115 |
Licence  |
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| Title (Primary) | Bioavailable dissolved organic carbon serves as a key regulator of phosphorus dynamics in stream biofilms |
| Author | Perujo, N.; Graeber, D.; Fink, P.
; Neuert, L.; Sunjidmaa, N.; Weitere, M. |
| Source Titel | Environmental Microbiology Reports |
| Year | 2025 |
| Department | ASAM; FLOEK |
| Volume | 17 |
| Issue | 3 |
| Page From | e70115 |
| Language | englisch |
| Topic | T5 Future Landscapes |
| Supplements | https://enviromicro-journals.onlinelibrary.wiley.com/action/downloadSupplement?doi=10.1111%2F1758-2229.70115&file=emi470115-sup-0001-TableS1.docx |
| Keywords | bioavailable dissolved organic carbon; eutrophication; extracellular enzyme activity; microbial biofilms; phosphorus; sediments; sediment–water interface |
| Abstract | Phosphorus (P) dynamics at the sediment–water interface of aquatic ecosystems are receiving increasing attention due to their implications for water quality. P uptake by microbial biofilms can serve as a mechanism to control and mitigate the risk of eutrophication. Microbial biofilms capture P both intracellularly and extracellularly. While the significance of extracellular P entrapment in biofilms in engineered systems has recently been established, little is known about its dynamics in aquatic ecosystems. Current research on eutrophication control predominantly emphasises nitrogen, phosphorus or nitrogen-phosphorus ratio-based approaches, often overlooking the potential indirect influence of bioavailable dissolved organic carbon (DOC) on P uptake by heterotrophic microorganisms. In this study, we tested the effect of bioavailable DOC on P entrapment patterns in biofilms and in biofilm P-regulation mechanisms such as polyphosphate accumulation and alkaline phosphatase activity in semi-natural flow-through experimental flumes. Our results show that intracellular P entrapment is limited by bioavailable DOC, while extracellular P entrapment is independent of bioavailable DOC and has the potential to offset intracellular P saturation. We further demonstrate that DOC bioavailability influences benthic P cycling and that its implications extend into critical areas of ecosystem functioning such as river self-purification, competitive resource utilisation and organic P cycling. |
| Persistent UFZ Identifier | https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=30831 |
| Perujo, N., Graeber, D., Fink, P., Neuert, L., Sunjidmaa, N., Weitere, M. (2025): Bioavailable dissolved organic carbon serves as a key regulator of phosphorus dynamics in stream biofilms Environ. Microbiol. Rep. 17 (3), e70115 10.1111/1758-2229.70115 |
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