Plankton assessment across the distribution of West African hake and tuna based on eDNA metabarcoding.

Autor: Fernandez S; Department of Functional Biology, University of Oviedo, Spain., Ardura A; Department of Functional Biology, University of Oviedo, Spain., Martinez JL; Unit of DNA Analysis, University of Oviedo, Spain., Rick J; Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, AWI - Department of Coastal Ecology, Germany., Machado-Schiaffino G; Department of Functional Biology, University of Oviedo, Spain., Garcia-Vazquez E; Department of Functional Biology, University of Oviedo, Spain. Electronic address: egv@uniovi.es.
Jazyk: angličtina
Zdroj: Marine environmental research [Mar Environ Res] 2024 Feb; Vol. 194, pp. 106312. Date of Electronic Publication: 2023 Dec 22.
DOI: 10.1016/j.marenvres.2023.106312
Abstrakt: The richness of plankton communities determines the fish productivity in the ocean, including important resources that rely on extractive fisheries, such as hakes (genus Merluccius) and tunas (genus Thunnus). Their preys forage on zooplankton, and the latter feed on phytoplankton. Inventories of plankton communities for scientific advice to sustainable fishing are essential in this moment of climate change. Plankton is generally inventoried using conventional methodologies based on large water volumes and visual morphological analyses of samples. In this study, we have employed metabarcoding on environmental DNA (eDNA) samples extracted from small water volumes for plankton inventory from twelve distant sampling stations in the East Atlantic Ocean. Zones rich in hake and tuna prey were detected from eDNA, and multivariate multiple regression analysis was able to predict those zones from diatom-based indices and planktonic diversity based on functional groups. Salinity was negatively correlated with the proportion of diatoms in phytoplankton, highlighting expected impacts of current global change on marine plankton communities. The results emphasise the importance of the plankton richness for fish productivity and support the utility of environmental DNA as a tool to monitor plankton composition changes.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2023 The Authors. Published by Elsevier Ltd.. All rights reserved.)
Databáze: MEDLINE
Externí odkaz: