Kari Skjånes
Research Scientist
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Abstract
Algal-based wastewater remediation systems (phycoremediation) include phycosphere bacterial communities that influence algal growth, pollutant remediation, and downstream applications of biomass as fertilizers or bio-stimulants. This study investigated the bacterial community dynamics in a novel phycoremediation system using a co-culture of the green algae Stigeoclonium sp. and Oedogonium vaucheri. Bacterial abundance was estimated using flow cytometry (FCM), while community composition was assessed through 16S rRNA gene metabarcoding. Additionally, 28 bacterial strains were isolated from the bioremediation experiment, cultured, genetically characterized for identification and screened for production of the auxin phytohormone indole-3-acetic acid (IAA). Metabarcoding showed that the free-living bacterial community consisted of bacteria from both the wastewater effluent and the algal inocula, while the attached phycosphere community was dominated by bacteria from the algal inocula, indicating the stability of the algae-associated phycosphere. Taxa known to include plant growth-promoting bacteria (PGPB) were abundant, and several strains produced IAA. The bacterial community composition, combined with the potential production of phytohormone by isolated bacteria indicates symbiotic or commensal algae-microbe interactions within the phycosphere bacterial communities. Sterile filtration of wastewater effluent, including only the algal inoculum bacterial communities, reduced algal biomass production and increased bacterial abundance. This study highlights the critical role of microbial interactions in engineered ecosystems and provides insights for optimizing algal-based wastewater treatment technologies.
Authors
Ralf Rautenberger Alexandre Detain Kari Skjånes Peter Simon Claus Schulze Viswanath Kiron Daniela Morales-SánchezAbstract
No abstract has been registered
Abstract
No abstract has been registered

Division of Biotechnology and Plant Health
Microalgae contributions to future protein and fatty acid rich feed for Norwegian chicken at industrial scale - ALGEKYLLING
The main goal of the project is to create a knowledge and technology platform for production and use of chicken feed with proteins and polyunsaturated fatty acids (PUFA) from Norwegian microalgae biomass. The project consortium includes the whole production/value chain.

Division of Biotechnology and Plant Health
MikRho - Establishing Rhodomonas culture with beneficial microbiome adapted to industrial production
As one of the largest microalgae producers in Norway, CFEED contributes to sustainable feed solutions through its production of microalgae and the copepod