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Van Driessche C, Everts T, Neyrinck S, Halfmaerten D, Verschelde P, Breine J, Bonte D, Brys R. Environmental DNA metabarcoding reflects spatiotemporal fish community shifts in the Scheldt estuary. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 934:173242. [PMID: 38763188 DOI: 10.1016/j.scitotenv.2024.173242] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/03/2024] [Revised: 03/28/2024] [Accepted: 05/12/2024] [Indexed: 05/21/2024]
Abstract
Estuarine ecosystems face increasing anthropogenic pressures, necessitating effective monitoring methods to mitigate their impacts on the biodiversity they harbour. The use of environmental DNA (eDNA) based detection methods is increasingly recognized as a promising tool to complement other, potentially invasive monitoring techniques. Integrating such eDNA analyses into monitoring frameworks for large ecosystems is still challenging and requires a deeper understanding of the scale and resolution at which eDNA patterns may offer insights in species presence and community composition space and time. The Scheldt estuary, characterized by its diverse habitats and complex currents, is one of the largest Western European tidal river systems. Until now, it remains challenging to obtain accurate information on fish communities living in and migrating through this ecosystem, consequently confining our knowledge to specific locations. To explore the potential of eDNA based monitoring, we simultaneously combine stow net fishing with eDNA metabarcoding, to assess spatiotemporal shifts in the Scheldt estuary's fish communities. In total, we detected 71 fish species in the estuary using eDNA metabarcoding, partly overlapping with historic fish community data gathered at the different study locations and in contrast to only 42 species using stow net fishing during the same survey period. Community compositions found by both detection methods varied among sampling locations, driven by a clear correlation to the salinity gradient. Limited effects of sampling depth and tide were observed on the eDNA metabarcoding data, allowing a significant reduction of the eDNA sampling effort for future eDNA fish monitoring campaigns in this study system. Our results further demonstrate that seasonal shifts in fish species occurrence can be detected using eDNA metabarcoding. Combining eDNA metabarcoding and stow net fishing further enhances our understanding of this vital waterway's diverse fish populations, allowing a higher resolution and more efficient monitoring strategy.
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Affiliation(s)
- Charlotte Van Driessche
- Research Institute for Nature and Forest (INBO), Geraardsbergen, Belgium; Ghent University, Department of Biology, Terrestrial Ecology Unit, Ghent, Belgium.
| | - Teun Everts
- Research Institute for Nature and Forest (INBO), Geraardsbergen, Belgium; KU Leuven, Department of Biology, Plant Conservation and Population Biology, Leuven, Belgium
| | - Sabrina Neyrinck
- Research Institute for Nature and Forest (INBO), Geraardsbergen, Belgium
| | - David Halfmaerten
- Research Institute for Nature and Forest (INBO), Geraardsbergen, Belgium
| | - Pieter Verschelde
- Research Institute for Nature and Forest (INBO), Geraardsbergen, Belgium
| | - Jan Breine
- Research Institute for Nature and Forest (INBO), Linkebeek, Belgium
| | - Dries Bonte
- Ghent University, Department of Biology, Terrestrial Ecology Unit, Ghent, Belgium
| | - Rein Brys
- Research Institute for Nature and Forest (INBO), Geraardsbergen, Belgium
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2
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Bader S, Gaye-Siessegger J, Scholz B, Mota-Ferreira M, Brinker A. Obtaining accurate population estimates with reduced workload and lower fish mortality in multi-mesh gillnet sampling of a large pre-alpine lake. PLoS One 2024; 19:e0299774. [PMID: 38498550 PMCID: PMC10947718 DOI: 10.1371/journal.pone.0299774] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2023] [Accepted: 02/14/2024] [Indexed: 03/20/2024] Open
Abstract
The EU Water Framework Directive requires monitoring of the ecological status of lakes, with fish as a relevant class of biotic quality indicator, but monitoring fish populations in large lakes is demanding. This study evaluated use in Lake Constance of a novel multi-mesh gillnet modified to reduce catch numbers. In direct comparison with conventional European Committee for Standardization (CEN) nets we achieved 48% reduction in fish mortality with 38% less labour for tasks directly influenced by fish catch numbers, while maintaining comparable species composition and catch per unit effort. Comparison of mesh sizes indicated no significant reduction in species detection in area-reduced panels of the small mesh sizes, while total observed species richness was greater when using the modified nets. Differences in benthic species communities among depth strata were common, while those of pelagic zones were more homogeneous and did not differ significantly with depth. Catches of different net types from the same depth stratum did not exhibit significant differences. The dominance structure of the most common species, relevant to lake assessment, was similar in catches of both net types, suggesting overall superiority of the modified nets in Lake Constance. Sampling conducted according to standard European CEN protocol, while deploying 60% fewer nets, yielded sufficiently precise abundance estimates for monitoring shallow areas of the benthic zone. A 50% difference in the abundance of dominant species was detected among sampling events with a certainty of 95%. The sample did not provide comparable accuracy in deep benthic strata or the pelagic zone, but was adequate to record complete inventories of species present. Based on this trial data, a new stratified sampling design is proposed for monitoring large lake fish communities for ecological assessment. Depth-dependent fish communities were used to calculate the required number of nets, which resulted in a 69% reduction for the entire lake compared to the CEN calculation method. Using the modified nets increases the feasibility of performing WFD surveys, by reducing effort and cost, while the simultaneous halving of fish mortality minimises the negative impact of fish surveys.
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Affiliation(s)
- Steffen Bader
- Fisheries Research Station Baden-Württemberg, Langenargen, Germany
| | | | - Barbara Scholz
- Fisheries Research Station Baden-Württemberg, Langenargen, Germany
- The Bavarian State Institute of Forestry, Freising, Germany
| | | | - Alexander Brinker
- Fisheries Research Station Baden-Württemberg, Langenargen, Germany
- University of Konstanz, Konstanz, Germany
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3
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Griffiths NP, Wright RM, Hänfling B, Bolland JD, Drakou K, Sellers GS, Zogaris S, Tziortzis I, Dörflinger G, Vasquez MI. Integrating environmental DNA monitoring to inform eel ( Anguilla anguilla) status in freshwaters at their easternmost range-A case study in Cyprus. Ecol Evol 2023; 13:e9800. [PMID: 36861027 PMCID: PMC9969183 DOI: 10.1002/ece3.9800] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2022] [Revised: 12/28/2022] [Accepted: 01/20/2023] [Indexed: 03/03/2023] Open
Abstract
Despite significant population declines and targeted European Union regulations aimed at Anguilla anguilla conservation, little attention has been given to their status at their easternmost range. This study applies wide-scale integrated monitoring to uncover the present-day eel distribution in Cyprus' inland freshwaters. These are subject to increasing pressures from water supply requirements and dam construction, as seen throughout the Mediterranean. We applied environmental DNA metabarcoding of water samples to determine A. anguilla distribution in key freshwater catchments. In addition, we present this alongside 10 years of electrofishing/netting data. Refuge traps were also deployed to establish the timing of glass eel recruitment. These outputs are used together, alongside knowledge of the overall fish community and barriers to connectivity, to provide eel conservation and policy insights. This study confirm the presence of A. anguilla in Cyprus' inland freshwaters, with recruitment occurring in March. Eel distribution is restricted to lower elevation areas, and is negatively associated with distance from coast and barriers to connectivity. Many barriers to connectivity are identified, though eels were detected in two reservoirs upstream of dams. The overall fish community varies between freshwater habitat types. Eels are much more widespread in Cyprus than previously thought, yet mostly restricted to lowland intermittent systems. These findings make a case to reconsider the requirement for eel management plans. Environmental DNA-based data collected in 2020 indicate that "present-day" eel distribution is representative of 10-year survey trends. Suggesting that inland freshwaters may act as an unrealized refuge at A. anguilla's easternmost range. Conservation efforts in Mediterranean freshwaters should focus on improving connectivity, therefore enabling eels to access inland perennial refugia. Thus, mitigating the impact of climate change and the growing number of fragmented artificially intermittent river systems.
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Affiliation(s)
- Nathan P. Griffiths
- Biological and Marine Sciences, Hardy BuildingUniversity of HullHullUK,Institute for Biodiversity and Freshwater ConservationUniversity of the Highlands and IslandsInvernessUK
| | | | - Bernd Hänfling
- Institute for Biodiversity and Freshwater ConservationUniversity of the Highlands and IslandsInvernessUK
| | | | - Katerina Drakou
- Department of Chemical EngineeringCyprus University of TechnologyLimassolCyprus
| | - Graham S. Sellers
- Biological and Marine Sciences, Hardy BuildingUniversity of HullHullUK
| | - Stamatis Zogaris
- Hellenic Centre for Marine ResearchInstitute of Marine Biological Resources and Inland WatersAnavissosGreece
| | - Iakovos Tziortzis
- Water Development Department, Ministry of AgricultureRural Development and EnvironmentNicosiaCyprus
| | - Gerald Dörflinger
- Water Development Department, Ministry of AgricultureRural Development and EnvironmentNicosiaCyprus
| | - Marlen I. Vasquez
- Department of Chemical EngineeringCyprus University of TechnologyLimassolCyprus
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4
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Hervé A, Domaizon I, Baudoin JM, Dejean T, Gibert P, Jean P, Peroux T, Raymond JC, Valentini A, Vautier M, Logez M. Spatio-temporal variability of eDNA signal and its implication for fish monitoring in lakes. PLoS One 2022; 17:e0272660. [PMID: 35960745 PMCID: PMC9374266 DOI: 10.1371/journal.pone.0272660] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2022] [Accepted: 07/24/2022] [Indexed: 11/18/2022] Open
Abstract
Environmental DNA (eDNA) metabarcoding is revolutionizing the monitoring of aquatic biodiversity. The use of eDNA has the potential to enable non-invasive, cost-effective, time-efficient and high-sensitivity monitoring of fish assemblages. Although the capacity of eDNA metabarcoding to describe fish assemblages is recognised, research efforts are still needed to better assess the spatial and temporal variability of the eDNA signal and to ultimately design an optimal sampling strategy for eDNA monitoring. In this context, we sampled three different lakes (a dam reservoir, a shallow eutrophic lake and a deep oligotrophic lake) every 6 weeks for 1 year. We performed four types of sampling for each lake (integrative sampling of sub-surface water along transects on the left shore, the right shore and above the deepest zone, and point sampling in deeper layers near the lake bottom) to explore the spatial variability of the eDNA signal at the lake scale over a period of 1 year. A metabarcoding approach was applied to analyse the 92 eDNA samples in order to obtain fish species inventories which were compared with traditional fish monitoring methods (standardized gillnet samplings). Several species known to be present in these lakes were only detected by eDNA, confirming the higher sensitivity of this technique in comparison with gillnetting. The eDNA signal varied spatially, with shoreline samples being richer in species than the other samples. Furthermore, deep-water samplings appeared to be non-relevant for regularly mixed lakes, where the eDNA signal was homogeneously distributed. These results also demonstrate a clear temporal variability of the eDNA signal that seems to be related to species phenology, with most of the species detected in spring during the spawning period on shores, but also a peak of detection in winter for salmonid and coregonid species during their reproduction period. These results contribute to our understanding of the spatio-temporal distribution of eDNA in lakes and allow us to provide methodological recommendations regarding where and when to sample eDNA for fish monitoring in lakes.
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Affiliation(s)
- Alix Hervé
- SPYGEN, Le Bourget du Lac, France
- Pole R&D ECLA, Le Bourget-du-Lac, France
- INRAE, Aix Marseille Université, RECOVER, Aix-en-Provence, France
| | - Isabelle Domaizon
- Pole R&D ECLA, Le Bourget-du-Lac, France
- INRAE, UMR CARRTEL, Thonon-les-Bains, France
| | - Jean-Marc Baudoin
- Pole R&D ECLA, Le Bourget-du-Lac, France
- OFB, Direction de la Recherche et de l’Appui Scientifique, Route Cézanne, Aix-en-Provence, France
| | | | - Pierre Gibert
- Pole R&D ECLA, Le Bourget-du-Lac, France
- INRAE, Aix Marseille Université, RECOVER, Aix-en-Provence, France
| | | | - Tiphaine Peroux
- Pole R&D ECLA, Le Bourget-du-Lac, France
- INRAE, Aix Marseille Université, RECOVER, Aix-en-Provence, France
| | - Jean-Claude Raymond
- Pole R&D ECLA, Le Bourget-du-Lac, France
- OFB, DR AURA, Thonon-les-Bains, France
| | | | - Marine Vautier
- Pole R&D ECLA, Le Bourget-du-Lac, France
- INRAE, UMR CARRTEL, Thonon-les-Bains, France
| | - Maxime Logez
- Pole R&D ECLA, Le Bourget-du-Lac, France
- INRAE, Aix Marseille Université, RECOVER, Aix-en-Provence, France
- INRAE, UR RIVERLY, Villeurbanne, France
- * E-mail:
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5
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Mathon L, Valentini A, Guérin PE, Normandeau E, Noel C, Lionnet C, Boulanger E, Thuiller W, Bernatchez L, Mouillot D, Dejean T, Manel S. Benchmarking bioinformatic tools for fast and accurate eDNA metabarcoding species identification. Mol Ecol Resour 2021; 21:2565-2579. [PMID: 34002951 DOI: 10.1111/1755-0998.13430] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2021] [Revised: 05/10/2021] [Accepted: 05/11/2021] [Indexed: 12/01/2022]
Abstract
Bioinformatic analysis of eDNA metabarcoding data is a crucial step toward rigorously assessing biodiversity. Many programs are now available for each step of the required analyses, but their relative abilities at providing fast and accurate species lists have seldom been evaluated. We used simulated mock communities and real fish eDNA metabarcoding data to evaluate the performance of 13 bioinformatic programs and pipelines to retrieve fish occurrence and read abundance using the 12S mt rRNA gene marker. We used four indices to compare the outputs of each program with the simulated samples: sensitivity, F-measure, root-mean-square error (RMSE) on read relative abundances, and execution time. We found marked differences among programs only for the taxonomic assignment step, both in terms of sensitivity, F-measure and RMSE. Running time was highly different between programs for each step. The fastest programs with best indices for each step were assembled into a pipeline. We compared this pipeline to pipelines constructed from existing toolboxes (OBITools, Barque, and QIIME 2). Our pipeline and Barque obtained the best performance for all indices and appear to be better alternatives to highly used pipelines for analysing fish eDNA metabarcoding data when a complete reference database is available. Analysis on real eDNA metabarcoding data also indicated differences for taxonomic assignment and execution time only. This study reveals major differences between programs during the taxonomic assignment step. The choice of algorithm for the taxonomic assignment can have a significant impact on diversity estimates and should be made according to the objectives of the study.
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Affiliation(s)
- Laetitia Mathon
- CEFE, Univ. Montpellier, CNRS, EPHE-PSL University, IRD, Montpellier, France.,SPYGEN, Savoie Technolac, Le Bourget du Lac, France
| | | | | | - Eric Normandeau
- Université Laval, IBIS (Institut de Biologie Intégrative et des Systèmes), Québec, QC, Canada
| | - Cyril Noel
- IFREMER - IRSI - Service de Bioinformatique (SeBiMER), Plouzané, France
| | - Clément Lionnet
- Univ. Grenoble Alpes, Univ. Savoie Mont Blanc, CNRS, LECA, Laboratoire d'Ecologie Alpine, Grenoble, France
| | - Emilie Boulanger
- CEFE, Univ. Montpellier, CNRS, EPHE-PSL University, IRD, Montpellier, France.,MARBEC, Univ. Montpellier, CNRS, IRD, Ifremer, Montpellier, France
| | - Wilfried Thuiller
- Univ. Grenoble Alpes, Univ. Savoie Mont Blanc, CNRS, LECA, Laboratoire d'Ecologie Alpine, Grenoble, France
| | - Louis Bernatchez
- Université Laval, IBIS (Institut de Biologie Intégrative et des Systèmes), Québec, QC, Canada
| | - David Mouillot
- MARBEC, Univ. Montpellier, CNRS, IRD, Ifremer, Montpellier, France.,Institut Universitaire de France, IUF, Paris, France
| | - Tony Dejean
- SPYGEN, Savoie Technolac, Le Bourget du Lac, France
| | - Stéphanie Manel
- CEFE, Univ. Montpellier, CNRS, EPHE-PSL University, IRD, Montpellier, France
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6
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Pont D, Valentini A, Rocle M, Maire A, Delaigue O, Jean P, Dejean T. The future of fish-based ecological assessment of European rivers: from traditional EU Water Framework Directive compliant methods to eDNA metabarcoding-based approaches. JOURNAL OF FISH BIOLOGY 2021; 98:354-366. [PMID: 31644817 PMCID: PMC7891642 DOI: 10.1111/jfb.14176] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2019] [Accepted: 10/22/2019] [Indexed: 05/07/2023]
Abstract
Most of the present EU Water Framework Directive (WFD) compliant fish-based assessment methods of European rivers are multi-metric indices computed from traditional electrofishing (TEF) samples, but this method has known shortcomings, especially in large rivers. The probability of detecting rare species remains limited, which can alter the sensitivity of the indices. In recent years, environmental (e)DNA metabarcoding techniques have progressed sufficiently to allow applications in various ecological domains as well as eDNA-based ecological assessment methods. A review of the 25 current WFD-compliant methods for river fish shows that 81% of the metrics used in these methods are expressed in richness or relative abundance and thus compatible with eDNA samples. However, more than half of the member states' methods include at least one metric related to age or size structure and would have to adapt their current fish index if reliant solely on eDNA-derived information. Most trait-based metrics expressed in richness are higher when computed from eDNA than when computed from TEF samples. Comparable values are obtained only when the TEF sampling effort increases. Depending on the species trait considered, most trait-based metrics expressed in relative abundance are significantly higher for eDNA than for TEF samples or vice versa due to over-estimation of sub-surface species or under-estimation of benthic and rare species by TEF sampling, respectively. An existing predictive fish index, adapted to make it compatible with eDNA data, delivers an ecological assessment comparable with the current approved method for 22 of the 25 sites tested. Its associated uncertainty is lower than that of current fish indices. Recommendations for the development of future fish eDNA-based indices and the associated eDNA water sampling strategy are discussed.
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Affiliation(s)
- Didier Pont
- Institute of Hydrobiology and Aquatic Ecosystem ManagementUniversity of Natural Resources and Life Sciences, Gregor‐Mendel‐Strasse 33ViennaAustria
| | - Alice Valentini
- SPYGEN, 17 rue du Lac Saint‐André, Savoie TechnolacLe Bourget du LacFrance
| | | | - Anthony Maire
- EDF R&D LNHE ‐ Laboratoire National d'Hydraulique et EnvironnementChatouFrance
| | | | - Pauline Jean
- SPYGEN, 17 rue du Lac Saint‐André, Savoie TechnolacLe Bourget du LacFrance
| | - Tony Dejean
- SPYGEN, 17 rue du Lac Saint‐André, Savoie TechnolacLe Bourget du LacFrance
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7
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Jerde CL. Can we manage fisheries with the inherent uncertainty from eDNA? JOURNAL OF FISH BIOLOGY 2021; 98:341-353. [PMID: 31769024 DOI: 10.1111/jfb.14218] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2019] [Accepted: 11/25/2019] [Indexed: 06/10/2023]
Abstract
Environmental (e)DNA, as a general approach in aquatic systems, seeks to connect the presence of species' genetic material in the water and hence to infer the species' physical presence. However, fisheries managers face making decisions with risk and uncertainty when eDNA indicates a fish is present but traditional methods fail to capture the fish. In comparison with traditional methods such as nets, electrofishing and piscicides, eDNA approaches have more sources of underlying error that could give rise to false positives. This has resulted in some managers to question whether eDNA can be used to make management decisions because there is no fish in hand. As a relatively new approach, the methods and techniques have quickly evolved to improve confidence in eDNA. By evaluating an eDNA based research programmes through the pattern of the eDNA signal, assay design, experimental design, quality assurance and quality control checks, data analyses and concurrent search for fish using traditional gears, the evidence for fish presence can be evaluated to build confidence in the eDNA approach. The benefits for fisheries management from adopting an eDNA approach are numerous but include cost effectiveness, broader geographic coverage of habitat occupancy, early detection of invasive species, non-lethal stock assessments, exploration of previously inaccessible aquatic environments and discovery of new species hidden beneath the water's surface. At a time when global freshwater and marine fisheries are facing growing threats from over-harvest, pollution and climate change, we anticipate that growing confidence in eDNA will overcome the inherent uncertainty of not having a fish in hand and will empower the informed management actions necessary to protect and restore our fisheries.
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Affiliation(s)
- Christopher L Jerde
- Marine Science Institute, University of California, Santa Barbara, California, USA
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8
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Hänfling B, Lawson-Handley L. Environmental DNA-based approaches for the monitoring of fish populations have come of age. JOURNAL OF FISH BIOLOGY 2021; 98:339-340. [PMID: 33570202 DOI: 10.1111/jfb.14660] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Affiliation(s)
- Bernd Hänfling
- Evolutionary Biology Group, Department of Biological and Marine Sciences, University of Hull, Hull, UK
| | - Lori Lawson-Handley
- Evolutionary Biology Group, Department of Biological and Marine Sciences, University of Hull, Hull, UK
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9
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Curtis AN, Tiemann JS, Douglass SA, Davis MA, Larson ER. High stream flows dilute environmental DNA (eDNA) concentrations and reduce detectability. DIVERS DISTRIB 2020. [DOI: 10.1111/ddi.13196] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Affiliation(s)
- Amanda N. Curtis
- Program in Ecology, Evolution, and Conservation Biology University of Illinois Urbana‐Champaign Urbana IL USA
| | - Jeremy S. Tiemann
- Illinois Natural History Survey Prairie Research Institute University of Illinois Urbana‐Champaign Champaign IL USA
| | - Sarah A. Douglass
- Illinois Natural History Survey Prairie Research Institute University of Illinois Urbana‐Champaign Champaign IL USA
| | - Mark A. Davis
- Illinois Natural History Survey Prairie Research Institute University of Illinois Urbana‐Champaign Champaign IL USA
- Department of Natural Resources and Environmental Sciences University of Illinois Urbana‐Champaign Urbana IL USA
| | - Eric R. Larson
- Program in Ecology, Evolution, and Conservation Biology University of Illinois Urbana‐Champaign Urbana IL USA
- Department of Natural Resources and Environmental Sciences University of Illinois Urbana‐Champaign Urbana IL USA
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10
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Unger S, Bodinof Jachowski CM, Diaz L, Williams LA. Shelter Guarding Behavior of the Eastern Hellbender (Cryptobranchus alleganiensis alleganiensis) in North Carolina Streams. SOUTHEAST NAT 2020. [DOI: 10.1656/058.019.0411] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Affiliation(s)
- Shem Unger
- Department of Biology, Wingate University, Wingate, NC 28174
| | | | - Lauren Diaz
- Forestry and Environmental Conservation, Clemson University, Clemson, SC 29634
| | - Lori A. Williams
- North Carolina Wildlife Resources Commission, 1722 Mail Service Center, Raleigh, NC 27699
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11
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Goutte A, Molbert N, Guérin S, Richoux R, Rocher V. Monitoring freshwater fish communities in large rivers using environmental DNA metabarcoding and a long-term electrofishing survey. JOURNAL OF FISH BIOLOGY 2020; 97:444-452. [PMID: 32412670 DOI: 10.1111/jfb.14383] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2020] [Revised: 05/12/2020] [Accepted: 05/13/2020] [Indexed: 06/11/2023]
Abstract
Monitoring freshwater fish communities in a large human-impacted river is a challenging task. The structure of fish assemblages has been monitored yearly in the Marne and the Seine Rivers, across the Paris conurbation, France, using traditional electrofishing (EF) surveys since 1990, in accordance with the European Water Framework Directive. In addition, metabarcoding of DNA extracted from environmental samples (eDNA) was concomitantly conducted in nine sampling sites in 2017 and in 2018 to compare the estimates of species richness and relative abundance among three methods: annual, long-term EF monitoring and eDNA. The present study confirms better detection of fish species using eDNA compared to annual EF. eDNA metabarcoding was also more efficient for species detection than a 3-6-year EF survey but was similar or less efficient than a long-term EF survey of 14 years of monitoring. In addition, the numbers of reads per species relative to the total number of reads significantly increased with (a) increasing relative abundance (relative percentage of individuals caught per species) and (b) increasing number of years that a fish species was detected during the 2000-2018 period. These results suggest that eDNA could reflect local population persistence.
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Affiliation(s)
- Aurélie Goutte
- Sorbonne Université, CNRS, EPHE, UMR METIS, Paris, France
- EPHE, PSL Research University, Paris, France
| | - Noëlie Molbert
- Sorbonne Université, CNRS, EPHE, UMR METIS, Paris, France
| | - Sabrina Guérin
- Syndicat Interdépartemental pour l'Assainissement de l'Agglomération Parisienne (SIAAP), Colombes, France
| | - Robin Richoux
- Syndicat Interdépartemental pour l'Assainissement de l'Agglomération Parisienne (SIAAP), Colombes, France
| | - Vincent Rocher
- Syndicat Interdépartemental pour l'Assainissement de l'Agglomération Parisienne (SIAAP), Colombes, France
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