Morphogenesis and oxygen dynamics in phototrophic biofilms growing across a gradient of hydraulic conditions
| Autor: | Pietro de Anna, Michael Kühl, Hippolyte Bernard, Hannes Peter, Tom J. Battin, Anna Depetris, Amin Niayifar, Ankur Bordoloi |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
0301 basic medicine
Phototrophic biofilms 02 engineering and technology Plasticity Article 03 medical and health sciences Hydraulic head Microbiofilms Mass transfer biophysics Shear stress lcsh:Science Biomass (ecology) Multidisciplinary Chemistry Biofilm 15. Life on land biochemical phenomena metabolism and nutrition 021001 nanoscience & nanotechnology Shear (sheet metal) 030104 developmental biology This is an Open Access article under the terms of the Creative Commons Attribution License 13. Climate action Biophysics lcsh:Q 0210 nano-technology |
| Zdroj: | iScience Depetris, A, Peter, H, Bordoloi, A D, Bernard, H, Niayifar, A, Kühl, M, de Anna, P & Battin, T J 2021, ' Morphogenesis and oxygen dynamics in phototrophic biofilms growing across a gradient of hydraulic conditions ', iScience, vol. 24, no. 2, 102067 . https://doi.org/10.1016/j.isci.2021.102067 iScience, Vol 24, Iss 2, Pp 102067-(2021) |
| ISSN: | 2589-0042 |
| DOI: | 10.1016/j.isci.2021.102067 |
| Popis: | Summary Biofilms are surface-attached and matrix-enclosed microbial communities that dominate microbial life in numerous ecosystems. Using flumes and automated optical coherence tomography, we studied the morphogenesis of phototrophic biofilms along a gradient of hydraulic conditions. Compact and coalescent biofilms formed under elevated bed shear stress, whereas protruding clusters separated by troughs formed under reduced shear stress. This morphological differentiation did not linearly follow the hydraulic gradient, but a break point emerged around a shear stress of ~0.08 Pa. While community composition did not differ between high and low shear environments, our results suggest that the morphological differentiation was linked to biomass displacement and reciprocal interactions between the biofilm structure and hydraulics. Mapping oxygen concentrations within and around biofilm structures, we provide empirical evidence for biofilm-induced alterations of oxygen mass transfer. Our findings suggest that architectural plasticity, efficient mass transfer, and resistance to shear stress contribute to the success of phototrophic biofilms. Graphical abstract Highlights • We explored the structural differentiation of phototrophic biofilms in flume experiments • Two distinct morphologies emerged depending on bed shear stress • Oxygen measurements suggest efficient mass transfer in both morphologies • Feedbacks between structure and hydraulics drive biofilm morphogenesis Microbiofilms; biophysics |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|