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Investigating the dynamics of the aquatic community in Oslofjord through time series analysis of eDNA

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Publicado en:bioRxiv (Feb 8, 2025)
Autor principal: Mahlangu, Sibusiso
Otros Autores: Ewers, Isabelle, Cintia Oliveira Carvalho, Schroder-Nielsen, Audun, Dunthorn, Micah, Karlsen, Hans Erik, Sornes, Grete, Chavarie, Louise, Endresen, Dag, Ready, Jonathan Stuart, De Boer, Hugo J, Mauvisseau, Quentin
Publicado:
Cold Spring Harbor Laboratory Press
Materias:
Marine ecosystems
Multidimensional scaling
DNA barcoding
Aquatic ecosystems
Environmental DNA
Species richness
Clupea harengus
Acceso en línea:Citation/Abstract
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Resumen:Understanding temporal dynamics of marine communities is critical for assessing ecosystem health and guiding conservation efforts. Here, we conducted a survey using environmental DNA (eDNA) metabarcoding with two primer sets, MiFish and Elas02, to investigate seasonal and interannual changes in the fish community of Oslofjord (Norway) over two consecutive years. Using the MitoFish reference database through the GBIF querying tool, we identified 61 fish species and found significant changes in the dominant taxa between seasons and years. Clupea harengus (Atlantic herring) consistently peaked in early spring, while Scomber scombrus (Atlantic mackerel) dominated winter months in the second year. The MiFish primer set showed increased species richness in the second year, whereas the Elas02 primer set showed stable richness despite compositional turnover. Non-metric multidimensional scaling (NMDS) revealed distinct community separation between years in presence/absence data, driven by species turnover rather than abundance read changes. Our findings support the use of eDNA metabarcoding to capture fine-scale temporal dynamics and emphasise the importance of multi-year datasets for distinguishing ecological trends from stochastic changes. This strategy improves monitoring practices for marine ecosystems under anthropogenic stressors.Competing Interest StatementThe authors have declared no competing interest.Footnotes* https://doi.org/10.5281/zenodo.14809757
ISSN:2692-8205
DOI:10.1101/2025.02.05.636659
Fuente:Biological Science Database