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Carvalho CO, Gromstad W, Dunthorn M, Karlsen HE, Schrøder-Nielsen A, Ready JS, Haugaasen T, Sørnes G, de Boer H, Mauvisseau Q. Harnessing eDNA metabarcoding to investigate fish community composition and its seasonal changes in the Oslo fjord. Sci Rep 2024; 14:10154. [PMID: 38698067 PMCID: PMC11065990 DOI: 10.1038/s41598-024-60762-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2024] [Accepted: 04/26/2024] [Indexed: 05/05/2024] Open
Abstract
In the face of global ecosystem changes driven by anthropogenic activities, effective biomonitoring strategies are crucial for mitigating impacts on vulnerable aquatic habitats. Time series analysis underscores a great significance in understanding the dynamic nature of marine ecosystems, especially amidst climate change disrupting established seasonal patterns. Focusing on Norway's Oslo fjord, our research utilises eDNA-based monitoring for temporal analysis of aquatic biodiversity during a one year period, with bi-monthly sampling along a transect. To increase the robustness of the study, a taxonomic assignment comparing BLAST+ and SINTAX approaches was done. Utilising MiFish and Elas02 primer sets, our study detected 63 unique fish species, including several commercially important species. Our findings reveal a substantial increase in read abundance during specific migratory cycles, highlighting the efficacy of eDNA metabarcoding for fish composition characterization. Seasonal dynamics for certain species exhibit clear patterns, emphasising the method's utility in unravelling ecological complexities. eDNA metabarcoding emerges as a cost-effective tool with considerable potential for fish community monitoring for conservation purposes in dynamic marine environments like the Oslo fjord, contributing valuable insights for informed management strategies.
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Affiliation(s)
- Cintia Oliveira Carvalho
- Natural History Museum, University of Oslo, Oslo, Norway
- Group for Integrated Biological Investigation, Center for Advanced Studies of Biodiversity, Federal University of Pará, Belém, Brazil
| | | | - Micah Dunthorn
- Natural History Museum, University of Oslo, Oslo, Norway
| | | | | | - Jonathan Stuart Ready
- Group for Integrated Biological Investigation, Center for Advanced Studies of Biodiversity, Federal University of Pará, Belém, Brazil
| | - Torbjørn Haugaasen
- Faculty of Environmental Sciences and Natural Resource Management, Norwegian University of Life Sciences (NMBU), P.O. Box 5003, 1432, Aas, Norway
| | - Grete Sørnes
- Marine Research Station Drøbak, University of Oslo, Oslo, Norway
| | - Hugo de Boer
- Natural History Museum, University of Oslo, Oslo, Norway
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Zhou C, Liu D, Keesing J, Zhao N, Serrano O, Masqué P, Yuan Z, Jia Y, Wang Y. Microalgal assemblages response to water quality remediation in coastal waters of Perth, Australia. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2024; 351:124017. [PMID: 38685553 DOI: 10.1016/j.envpol.2024.124017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2023] [Revised: 04/16/2024] [Accepted: 04/19/2024] [Indexed: 05/02/2024]
Abstract
Nutrient reduction is an essential environmental policy for water quality remediation, but climate change can offset the ecological benefits of nutrient reduction and lead to the difficulty of environmental evaluation. Here, based on the records of three lipid microalgal biomarkers and stable isotopes of carbon and nitrogen in two sediment cores from the embayment of Perth, Australia, we reconstructed the microalgal biomasses (diatoms, dinoflagellates and coccolithophores) over the past century and evaluated the ecological effects of nutrient reduction on them, using Change Point Modeling (CPM) and redundancy analysis (RDA). The CPM result showed that total microalgal biomarkers increased by 25% and 51% in deep and shallow areas, respectively, due to nutrient enrichment caused by industrial wastewater in the 1950s and the causeway construction in the 1970s, and dinoflagellates were beneficiaries of eutrophication. The nutrient reduction policy since the 1980s had not decreased total microalgal biomass, and diatoms were beneficiaries of this period. RDA based on time series of sediment cores and water monitoring data revealed that the increase of sea-surface temperature and the decrease of rainfall since the 1980s may be important factors sustaining the high total microalgal biomass and increasing the degree of diatom dominance. The result also indicated that the variations of microalgal assemblages may better explain the effect of nutrient reduction rather than total microalgal biomass.
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Affiliation(s)
- Chongran Zhou
- State Key Laboratory of Estuarine and Coastal Research, Institute of Eco-Chongming, East China Normal University, Shanghai, 200241, China
| | - Dongyan Liu
- State Key Laboratory of Estuarine and Coastal Research, Institute of Eco-Chongming, East China Normal University, Shanghai, 200241, China.
| | - John Keesing
- CSIRO Oceans and Atmosphere Research, Indian Ocean Marine Research Centre, Crawley, WA, Australia; School of Molecular and Life Sciences, Curtin University, Perth, WA, Australia
| | - Ning Zhao
- State Key Laboratory of Estuarine and Coastal Research, Institute of Eco-Chongming, East China Normal University, Shanghai, 200241, China
| | - Oscar Serrano
- Centro de Estudios Avanzados de Blanes, Consejo Superior de Investigaciones Científicas (CEAB-CSIC), Blanes, Spain
| | - Pere Masqué
- School of Science and Centre for Marine Ecosystems Research, Edith Cowan University, Joondalup, Western Australia, Australia
| | | | - Yonghao Jia
- State Key Laboratory of Estuarine and Coastal Research, Institute of Eco-Chongming, East China Normal University, Shanghai, 200241, China
| | - Yujue Wang
- State Key Laboratory of Estuarine and Coastal Research, Institute of Eco-Chongming, East China Normal University, Shanghai, 200241, China
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Bachmann L, Beermann J, Brey T, de Boer HJ, Dannheim J, Edvardsen B, Ericson PGP, Holston KC, Johansson VA, Kloss P, Konijnenberg R, Osborn KJ, Pappalardo P, Pehlke H, Piepenburg D, Struck TH, Sundberg P, Markussen SS, Teschke K, Vanhove MPM. The role of systematics for understanding ecosystem functions: Proceedings of the Zoologica Scripta Symposium, Oslo, Norway, 25 August 2022. ZOOL SCR 2023. [DOI: 10.1111/zsc.12593] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/28/2023]
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