Assessing the utility of marine filter feeders for environmental DNA (eDNA) biodiversity monitoring.

Autor: Jeunen GJ; Department of Anatomy, School of Biomedical Sciences, University of Otago, Dunedin, New Zealand., Cane JS; Department of Anatomy, School of Biomedical Sciences, University of Otago, Dunedin, New Zealand.; ARC CoE for Coral Reef Studies, James Cook University, Townsville, Australia., Ferreira S; Department of Anatomy, School of Biomedical Sciences, University of Otago, Dunedin, New Zealand., Strano F; School of Biological Sciences, Victoria University of Wellington, Kelburn, New Zealand., von Ammon U; Cawthron Institute, Nelson, New Zealand., Cross H; Department of Anatomy, School of Biomedical Sciences, University of Otago, Dunedin, New Zealand., Day R; Department of Biochemistry, School of Biomedical Sciences, University of Otago, Dunedin, New Zealand., Hesseltine S; Department of Marine Sciences, University of Otago, Dunedin, New Zealand., Ellis K; Department of Marine Sciences, University of Otago, Dunedin, New Zealand., Urban L; Department of Anatomy, School of Biomedical Sciences, University of Otago, Dunedin, New Zealand., Pearson N; Department of Marine Sciences, University of Otago, Dunedin, New Zealand., Olmedo-Rojas P; Department of Marine Sciences, University of Otago, Dunedin, New Zealand., Kardailsky A; Department of Anatomy, School of Biomedical Sciences, University of Otago, Dunedin, New Zealand., Gemmell NJ; Department of Anatomy, School of Biomedical Sciences, University of Otago, Dunedin, New Zealand., Lamare M; Department of Marine Sciences, University of Otago, Dunedin, New Zealand.
Jazyk: angličtina
Zdroj: Molecular ecology resources [Mol Ecol Resour] 2023 May; Vol. 23 (4), pp. 771-786. Date of Electronic Publication: 2023 Jan 15.
DOI: 10.1111/1755-0998.13754
Abstrakt: Aquatic environmental DNA (eDNA) surveys are transforming how marine ecosystems are monitored. The time-consuming preprocessing step of active filtration, however, remains a bottleneck. Hence, new approaches that eliminate the need for active filtration are required. Filter-feeding invertebrates have been proven to collect eDNA, but side-by-side comparative studies to investigate the similarity between aquatic and filter-feeder eDNA signals are essential. Here, we investigated the differences among four eDNA sources (water; bivalve gill-tissue; sponges; and ethanol in which filter-feeding organisms were stored) along a vertically stratified transect in Doubtful Sound, New Zealand using three metabarcoding primer sets targeting fish and vertebrates. Combined, eDNA sources detected 59 vertebrates, while concurrent diver surveys observed eight fish species. There were no significant differences in alpha and beta diversity between water and sponge eDNA and both sources were highly correlated. Vertebrate eDNA was successfully extracted from the ethanol in which sponges were stored, although a reduced number of species were detected. Bivalve gill-tissue dissections, on the other hand, failed to reliably detect eDNA. Overall, our results show that vertebrate eDNA signals obtained from water samples and marine sponges are highly concordant. The strong similarity in eDNA signals demonstrates the potential of marine sponges as an additional tool for eDNA-based marine biodiversity surveys, by enabling the incorporation of larger sample numbers in eDNA surveys, reducing plastic waste, simplifying sample collection, and as a cost-efficient alternative. However, we note the importance to not detrimentally impact marine communities by, for example, nonlethal subsampling, specimen cloning, or using bycatch specimens.
(© 2023 John Wiley & Sons Ltd.)
Databáze: MEDLINE
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