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Somogyi B, Li H, Tapolczai K, Kovács AW, G-Tóth L, Horváth H, Krassován K, Fodor-Kardos A, Vörös L. Regime shift in microalgal dynamics: Impact of water level changes on planktonic and benthic algal biomass. Sci Total Environ 2024; 929:172351. [PMID: 38615783 DOI: 10.1016/j.scitotenv.2024.172351] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2023] [Revised: 02/29/2024] [Accepted: 04/08/2024] [Indexed: 04/16/2024]
Abstract
Whole-lake microalgal biomass surveys were carried out in Lake Balaton to investigate the seasonal, spatial, and temporal changes of benthic algae, as well as to identify the drivers of the phytobenthos. Phytobenthos was controlled mainly by light: the highest benthic algal biomass was in the shallow littoral region characterized by large grain size (sand) with good light availability but lower nutrient content in the sediment. During the investigated period, phytoplankton biomass showed a significant decrease in almost the entire lake. At the same time, the biomass of benthic algae increased significantly in the eastern areas, increasing the contribution of total lake microalgae biomass (from 20 % to 27 %). Benthic algal biomass increase can be explained by the better light supply, owing to the artificially maintained high water level which greatly mitigates water mixing. The decrease in planktonic algal biomass could be attributed to increased zooplankton grazing, which is otherwise negatively affected by mixing. As a result of the high water level, the trophic structure of the lake has been rearranged in recent decades with a shift from the planktonic life form to the benthic one while the nutrient supply has largely remained unchanged.
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Affiliation(s)
- Boglárka Somogyi
- HUN-REN, Balaton Limnological Research Institute, Klebelsberg Kuno utca 3, H-8237, Tihany, Hungary; National Laboratory for Water Science and Water Security, HUN-REN, Balaton Limnological Research Institute, Klebelsberg Kuno utca 3, H-8237, Tihany, Hungary.
| | - Huan Li
- HUN-REN, Balaton Limnological Research Institute, Klebelsberg Kuno utca 3, H-8237, Tihany, Hungary; National Laboratory for Water Science and Water Security, HUN-REN, Balaton Limnological Research Institute, Klebelsberg Kuno utca 3, H-8237, Tihany, Hungary
| | - Kálmán Tapolczai
- HUN-REN, Balaton Limnological Research Institute, Klebelsberg Kuno utca 3, H-8237, Tihany, Hungary; National Laboratory for Water Science and Water Security, HUN-REN, Balaton Limnological Research Institute, Klebelsberg Kuno utca 3, H-8237, Tihany, Hungary
| | - Attila W Kovács
- HUN-REN, Balaton Limnological Research Institute, Klebelsberg Kuno utca 3, H-8237, Tihany, Hungary; National Laboratory for Water Science and Water Security, HUN-REN, Balaton Limnological Research Institute, Klebelsberg Kuno utca 3, H-8237, Tihany, Hungary
| | - László G-Tóth
- HUN-REN, Balaton Limnological Research Institute, Klebelsberg Kuno utca 3, H-8237, Tihany, Hungary; National Laboratory for Water Science and Water Security, HUN-REN, Balaton Limnological Research Institute, Klebelsberg Kuno utca 3, H-8237, Tihany, Hungary
| | - Hajnalka Horváth
- HUN-REN, Balaton Limnological Research Institute, Klebelsberg Kuno utca 3, H-8237, Tihany, Hungary; National Laboratory for Water Science and Water Security, HUN-REN, Balaton Limnological Research Institute, Klebelsberg Kuno utca 3, H-8237, Tihany, Hungary
| | - Krisztina Krassován
- HUN-REN, Balaton Limnological Research Institute, Klebelsberg Kuno utca 3, H-8237, Tihany, Hungary; National Laboratory for Water Science and Water Security, HUN-REN, Balaton Limnological Research Institute, Klebelsberg Kuno utca 3, H-8237, Tihany, Hungary
| | - Andrea Fodor-Kardos
- HUN-REN Research Centre for Natural Sciences, Magyar tudósok körútja 2, 1117 Budapest, Hungary
| | - Lajos Vörös
- HUN-REN, Balaton Limnological Research Institute, Klebelsberg Kuno utca 3, H-8237, Tihany, Hungary; National Laboratory for Water Science and Water Security, HUN-REN, Balaton Limnological Research Institute, Klebelsberg Kuno utca 3, H-8237, Tihany, Hungary
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Kahlert M, Fölster J, Tapolczai K. No lukewarm diatom communities-the response of freshwater benthic diatoms to phosphorus in streams as basis for a new phosphorus diatom index (PDI SE). Environ Monit Assess 2023; 195:807. [PMID: 37278915 DOI: 10.1007/s10661-023-11378-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Subscribe] [Scholar Register] [Received: 01/10/2023] [Accepted: 05/09/2023] [Indexed: 06/07/2023]
Abstract
In the present study, we developed a new Swedish phosphorus diatom index (PDISE) to improve the poor fit of existing indices to match the needs of water managers to detect and mitigate eutrophication. We took advantage of a large amount of data (820 Swedish stream sites) collected in recent years. During our work, we found an unexpected bimodal response of the diatom assemblages to phosphorus. The taxa clustered either into an assemblage with a low or with a high site-specific averaged TP optimum (a calculated value comprised of the diatom taxa-specific optima). We could not find a characteristic diatom assemblage for sites with intermediate site-specific averaged TP optima. To our knowledge, this bimodal community response has not been shown earlier. The PDISE correlated more strongly than the currently used TDI to changes in TP concentrations. Thus, the PDISE should replace the TDI in the Swedish standard method. The modeled TP optima (expressed as categories) were different compared to the TDI for most of the taxa included in the index, indicating that the realized niche for these morphotaxa was different between Sweden and the UK where the TDI was developed originally. With a r2 of 0.68, the correlation of the PDISE to TP is among the highest reported for other diatom nutrient indices globally; thus, we believe that it might be worth to test it for other bioregions with similar geography and climate.
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Affiliation(s)
- Maria Kahlert
- Department of Aquatic Sciences and Assessment, Swedish University of Agricultural Sciences, PO Box 7050, 750 07, Uppsala, Sweden.
| | - Jens Fölster
- Department of Aquatic Sciences and Assessment, Swedish University of Agricultural Sciences, PO Box 7050, 750 07, Uppsala, Sweden
| | - Kálmán Tapolczai
- Balaton Limnological Research Institute, Eötvös Loránd Research Network (ELKH), Klebelsberg Kuno u. 3, Tihany, Hungary
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Svigruha R, Prikler B, Farkas A, Ács A, Fodor I, Tapolczai K, Schmidt J, Bordós G, Háhn J, Harkai P, Kaszab E, Szoboszlay S, Pirger Z. Presence, variation, and potential ecological impact of microplastics in the largest shallow lake of Central Europe. Sci Total Environ 2023; 883:163537. [PMID: 37075990 DOI: 10.1016/j.scitotenv.2023.163537] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2022] [Revised: 04/11/2023] [Accepted: 04/12/2023] [Indexed: 05/03/2023]
Abstract
The presence of microplastics (MPs) in the global ecosystem has generated a rapidly growing concern worldwide. Although their presence in the marine environment has been well-studied, much less data are available on their abundance in freshwaters. MPs alone and in combination with different chemicals has been shown to cause acute and chronic effects on algae and aquatic invertebrate and vertebrate species at different biological levels. However, the combined ecotoxicological effects of MPs with different chemicals on aquatic organisms are still understudied in many species and the reported data are often controversial. In the present study, we investigated, for the first time, the presence of MPs in Lake Balaton, which is the largest shallow lake of Central Europe and an important summer holiday destination. Moreover, we exposed neonates of the well-established ecotoxicological model organism Daphnia magna to different MPs (polystyrene [3 μm] or polyethylene [≤ 100 μm]) alone and in combination with three progestogen compounds (progesterone, drospirenone, levonorgestrel) at an environmentally relevant concentration (10 ng L-1) for 21 days. The presence of 7 polymer types of MPs in the size range of 50-100 μm was detected in Lake Balaton. Similarly to the global trends, polypropylene and polyethylene MPs were the most common types of polymer. The calculated polymer-independent average particle number was 5.5 particles m-3 (size range: 50 μm - 100 μm) which represents the values detected in other European lakes. Our ecotoxicological experiments confirmed that MPs and progestogens can affect D. magna at the behavioral (body size and reproduction) and biochemical (detoxification-related enzyme activity) levels. The joint effects were negligible. The presence of MPs may lead to reduced fitness in the aquatic biota in freshwaters such as Lake Balaton, however, the potential threat of MPs as vectors for progestogens may be limited.
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Affiliation(s)
- Réka Svigruha
- Ecophysiological and Environmental Toxicological Research Group, Balaton Limnological Research Institute, Eötvös Loránd Research Network (ELKH), 8237 Tihany, Hungary
| | - Bence Prikler
- Eurofins-Wessling Hungary Ltd, 1045 Budapest, Hungary; Institute of Aquaculture and Environmental Safety, Hungarian University of Agriculture and Life Sciences, 2100 Gödöllő, Hungary
| | - Anna Farkas
- Ecophysiological and Environmental Toxicological Research Group, Balaton Limnological Research Institute, Eötvös Loránd Research Network (ELKH), 8237 Tihany, Hungary
| | - András Ács
- Ecophysiological and Environmental Toxicological Research Group, Balaton Limnological Research Institute, Eötvös Loránd Research Network (ELKH), 8237 Tihany, Hungary
| | - István Fodor
- Ecophysiological and Environmental Toxicological Research Group, Balaton Limnological Research Institute, Eötvös Loránd Research Network (ELKH), 8237 Tihany, Hungary
| | - Kálmán Tapolczai
- Aquatic Botany and Microbial Ecology Research Group, Balaton Limnological Research Institute, Eötvös Loránd Research Network (ELKH), 8237 Tihany, Hungary
| | - János Schmidt
- Institute of Biochemistry and Medical Chemistry, Medical School, University of Pécs, 7624 Pécs, Hungary
| | - Gábor Bordós
- Eurofins-Wessling Hungary Ltd, 1045 Budapest, Hungary
| | - Judit Háhn
- Institute of Aquaculture and Environmental Safety, Hungarian University of Agriculture and Life Sciences, 2100 Gödöllő, Hungary
| | - Péter Harkai
- Institute of Aquaculture and Environmental Safety, Hungarian University of Agriculture and Life Sciences, 2100 Gödöllő, Hungary
| | - Edit Kaszab
- Institute of Aquaculture and Environmental Safety, Hungarian University of Agriculture and Life Sciences, 2100 Gödöllő, Hungary
| | - Sándor Szoboszlay
- Institute of Aquaculture and Environmental Safety, Hungarian University of Agriculture and Life Sciences, 2100 Gödöllő, Hungary
| | - Zsolt Pirger
- Ecophysiological and Environmental Toxicological Research Group, Balaton Limnological Research Institute, Eötvös Loránd Research Network (ELKH), 8237 Tihany, Hungary.
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Kulaš A, Gligora Udovič M, Tapolczai K, Žutinić P, Orlić S, Levkov Z. Diatom eDNA metabarcoding and morphological methods for bioassessment of karstic river. Sci Total Environ 2022; 829:154536. [PMID: 35304150 DOI: 10.1016/j.scitotenv.2022.154536] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/06/2021] [Revised: 02/20/2022] [Accepted: 03/08/2022] [Indexed: 06/14/2023]
Abstract
Karst ecosystems play a unique role as exceptional natural habitats in sustaining biodiversity. This study focuses on diatoms, a diverse group of microeukaryotes in the periphytic community of a karstic river. In a multi-microhabitat study along the Krka River (Croatia), our goal was to obtain a detailed overview of diatom diversity and community structure using morphological and molecular approaches, and to assess the applicability of eDNA metabarcoding as a reliable tool for biomonitoring assessment. The results revealed a relatively low agreement in the diatom community composition between the two approaches, but also provided complementary information, with no differences in beta diversity detected between microhabitats. The SIMPER analysis underlined the importance of the molecular approach in identifying diatom community composition, due to errors in distinguishing between deposited diatom cells that occurred in the morphological analysis. In contrast, the morphological approach indicated a clear diatom community separation along the river with a strong location effect. Despite certain differences, both approaches provided a feasible assessment of the ecological status according to the relationship to environmental pressures, classifying the Krka River as High (morphological approach) or Good (molecular approach) throughout the most of its course. Moreover, diatom diversity based on both approaches provides a reliable dataset applicable in routine monitoring assessment and offers a deeper understanding of the presented ecological status. The incompleteness of a reference database presents one major drawback of the molecular approach, which needs further updating in order to improve routine diatom metabarcoding.
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Affiliation(s)
- Antonija Kulaš
- University of Zagreb, Faculty of Science, Department of Biology, Rooseveltov trg 6, HR-10000 Zagreb, Croatia.
| | - Marija Gligora Udovič
- University of Zagreb, Faculty of Science, Department of Biology, Rooseveltov trg 6, HR-10000 Zagreb, Croatia
| | - Kálmán Tapolczai
- Premium Postdoctoral Research Program, Hungarian Academy of Sciences, Budapest, Hungary; Research Group of Limnology, Center for Natural Science, University of Pannonia, Egyetem u. 10, H-8200 Veszprém, Hungary; Balaton Limnological Research Institute, Eötvös Loránd Research Network (ELKH), Klebelsberg Kuno u. 3, Tihany, Hungary
| | - Petar Žutinić
- University of Zagreb, Faculty of Science, Department of Biology, Rooseveltov trg 6, HR-10000 Zagreb, Croatia
| | - Sandi Orlić
- Ruđer Bošković Institute, Bijenička cesta 54, HR-10000 Zagreb, Croatia; Center of Excellence for Science and Technology Integrating Mediterranean Region (STIM), HR-10000 Zagreb, Croatia
| | - Zlatko Levkov
- Institute of Biology, Faculty of Natural Science, Ss Cyril and Methodius University, Skopje, Macedonia
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Várbíró G, Borics G, Novais MH, Morais MM, Rimet F, Bouchez A, Tapolczai K, Bácsi I, Usseglio-Polatera P, B-Béres V. Environmental filtering and limiting similarity as main forces driving diatom community structure in Mediterranean and continental temporary and perennial streams. Sci Total Environ 2020; 741:140459. [PMID: 32887020 DOI: 10.1016/j.scitotenv.2020.140459] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2020] [Revised: 06/07/2020] [Accepted: 06/21/2020] [Indexed: 06/11/2023]
Abstract
Climatic extreme events such as droughts (unpredictable), dry periods (predictable) or even flush floods, threaten freshwater ecosystems worldwide. The filtering mechanisms of these events and their strength on communities, however, can be different among regions. While time-for-adaptation theory defines whether or not water scarcity can be considered as disturbance, the stress-dominance theory predicts an increase in importance of environmental filtering and a decrease in the role of biotic interactions in communities with increasing environmental stress. Here, we tested whether environmental filtering (leading to trait convergence) or limiting similarity (leading to trait divergence) is the main assembly rule shaping the structure and trait composition of benthic diatom assemblages in Mediterranean (Portuguese) and continental (Hungarian) temporary and perennial streams. We assumed that the trait composition of diatom assemblages in the two stream types would be less different in the Mediterranean than in the continental region (addressed to time-for-adaptation theory). We also hypothesized that trait composition would be shaped by environmental filtering in the Hungarian streams while by biotic interactions in Portuguese streams (addressed to stress-dominance theory). Our results supported our first hypothesis since traits, which associated primarily to temporary streams were found only in the continental region. Our findings, however, only partially proved the stress-dominance hypothesis. In the continental region, where drying up of streams were induced by unpredictable droughts, biotic interactions were the main assembly rules shaping community structure. In contrast, environmental filtering was nearly as important as limiting similarity in structuring trait composition in the Mediterranean region during the predictable dry phase with no superficial flow. These analyses also highlighted that drought events (both predictable and unpredictable ones) have a complex and strong influence on benthic diatom assemblages resulting even in irreversible changes in trait composition and thereby in ecosystem functioning.
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Affiliation(s)
- Gábor Várbíró
- MTA Centre for Ecological Research, Danube Research Institute, Department of Tisza Research, 18/c. Bem square, 4026 Debrecen, Hungary; MTA Centre for Ecological Research, GINOP Sustainable Ecosystems Group, 3. Klebelsberg Kuno str., H-8237 Tihany, Hungary.
| | - Gábor Borics
- MTA Centre for Ecological Research, Danube Research Institute, Department of Tisza Research, 18/c. Bem square, 4026 Debrecen, Hungary; MTA Centre for Ecological Research, GINOP Sustainable Ecosystems Group, 3. Klebelsberg Kuno str., H-8237 Tihany, Hungary.
| | - Maria Helena Novais
- Renewable Energies Chair, University of Évora, Casa Cordovil, Rua D. Augusto Eduardo Nunes n 7, Évora, 7000-651, Portugal; Institute of Earth Sciences - ICT, University of Évora, Rua Romão Ramalho no. 59, 7000-671 Évora, Portugal.
| | - Maria Manuela Morais
- Institute of Earth Sciences - ICT, University of Évora, Rua Romão Ramalho no. 59, 7000-671 Évora, Portugal; Water Laboratory, Rua da Barba Rala, n.° 1, Parque Industrial e Tecnológico de Évora, 7005-345, Évora, Portugal.
| | - Frédéric Rimet
- UMR CARRTEL, INRAE, Université de Savoie Mont-Blanc, Thonon-les-Bains, France.
| | - Agnès Bouchez
- UMR CARRTEL, INRAE, Université de Savoie Mont-Blanc, Thonon-les-Bains, France.
| | - Kálmán Tapolczai
- Department of Limnology, University of Pannonia, H-8200 Veszprém, Egyetem u. 10, Hungary; Hungarian Academy of Sciences, Premium Postdoctoral Research Program, H-1051 Budapest, Nádor u. 7, Hungary.
| | - István Bácsi
- University of Debrecen, Department of Hydrobiology, P.O. Box 57, H-4010 Debrecen, Hungary.
| | | | - Viktória B-Béres
- MTA Centre for Ecological Research, Danube Research Institute, Department of Tisza Research, 18/c. Bem square, 4026 Debrecen, Hungary; MTA Centre for Ecological Research, GINOP Sustainable Ecosystems Group, 3. Klebelsberg Kuno str., H-8237 Tihany, Hungary.
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Tapolczai K, Keck F, Bouchez A, Rimet F, Kahlert M, Vasselon V. Diatom DNA Metabarcoding for Biomonitoring: Strategies to Avoid Major Taxonomical and Bioinformatical Biases Limiting Molecular Indices Capacities. Front Ecol Evol 2019. [DOI: 10.3389/fevo.2019.00409] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
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Kahlert M, Alfjorden A, Apunte-Ramos K, Bailet B, Pérez Burillo J, Carrera Gonzalez AG, Castro D, Di Bernardi C, Dully V, Fekete J, Frühe L, González R, Gratsia E, Hanjalić J, Kamberović J, Kelly AM, Meriggi C, Nousiainen I, Ørberg S, Orr J, Quintana C, Papatheodoulou A, Sargac J, Shahbaz M, Tapolczai K, Tosic K, Wallin I, Zupančič M, Bohman P, Buttigieg PL, Häubner N, Leese F, Macher J, Peura S, Roslin T, Strand M, Terenius O, Vasselon V, Weigand AM. New molecular methods to assess biodiversity. Potentials and pitfalls of DNA metabarcoding: a workshop report. RIO 2019. [DOI: 10.3897/rio.5.e38915] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
This report presents the outcome of the joint work of PhD students and senior researchers working with DNA-based biodiversity assessment approaches with the goal to facilitate others the access to definitions and explanations about novel DNA-based methods. The work was performed during a PhD course (SLU PNS0169) at the Swedish University of Agricultural Sciences (SLU) in Uppsala, Sweden. The course was co-organized by the EU COST research network DNAqua-Net and the SLU Research Schools Focus on Soils and Water (FoSW) and Ecology - basics and applications. DNAqua-Net (COST Action CA15219, 2016-2020) is a network connecting researchers, water managers, politicians and other stakeholders with the aim to develop new genetic tools for bioassessment of aquatic ecosystems in Europe and beyond. The PhD course offered a comprehensive overview of the paradigm shift from traditional morphology-based species identification to novel identification approaches based on molecular markers. We covered the use of molecular tools in both basic research and applied use with a focus on aquatic ecosystem assessment, from species collection to the use of diversity in environmental legislation. The focus of the course was on DNA (meta)barcoding and aquatic organisms. The knowledge gained was shared with the general public by creating Wikipedia pages and through this collaborative Open Access publication, co-authored by all course participants.
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Tapolczai K, Vasselon V, Bouchez A, Stenger‐Kovács C, Padisák J, Rimet F. The impact of OTU sequence similarity threshold on diatom-based bioassessment: A case study of the rivers of Mayotte (France, Indian Ocean). Ecol Evol 2019; 9:166-179. [PMID: 30680104 PMCID: PMC6342121 DOI: 10.1002/ece3.4701] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2018] [Revised: 09/23/2018] [Accepted: 09/24/2018] [Indexed: 11/10/2022] Open
Abstract
Extensive studies on the taxonomic resolution required for bioassessment purposes have determined that resolution above species level (genus, family) is sufficient for their use as indicators of relevant environmental pressures. The high-throughput sequencing (HTS) and meta-barcoding methods now used for bioassessment traditionally employ an arbitrary sequence similarity threshold (SST) around 95% or 97% to cluster sequences into operational taxonomic units, which is considered descriptive of species-level resolution. In this study, we analyzed the effect of the SST on the resulting diatom-based ecological quality index, which is based on OTU abundance distribution along a defined environmental gradient, ideally avoiding taxonomic assignments that could result in high rates of unclassified OTUs and biased final values. A total of 90 biofilm samples were collected in 2014 and 2015 from 51 stream sites on Mayotte Island in parallel with measures of relevant physical and chemical parameters. HTS sequencing was performed on the biofilms using the rbcL region as the genetic marker and diatom-specific primers. Hierarchical clustering was used to group sequences into OTUs using 20 experimental SST levels (80%-99%). An OTU-based quality index (IdxOTU) was developed based on a weighted average equation using the abundance profiles of the OTUs. The developed IdxOTU revealed significant correlations between the IdxOTU values and the reference pressure gradient, which reached maximal performance using an SST of 90% (well above species level delimitation). We observed an interesting and important trade-off with the power to discriminate between sampling sites and index stability that will greatly inform future applications of the index. Taken together, the results from this study detail a thoroughly optimized and validated approach to generating robust, reproducible, and complete indexes that will greatly facilitate effective and efficient environmental monitoring.
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Affiliation(s)
- Kálmán Tapolczai
- MTA‐PE Limnoecology Research GroupVeszprémHungary
- UMR CARRTELINRAThonon‐les‐BainsFrance
| | | | | | | | - Judit Padisák
- MTA‐PE Limnoecology Research GroupVeszprémHungary
- Department of LimnologyUniversity of PannoniaVeszprémHungary
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Vasselon V, Bouchez A, Rimet F, Jacquet S, Trobajo R, Corniquel M, Tapolczai K, Domaizon I. Avoiding quantification bias in metabarcoding: Application of a cell biovolume correction factor in diatom molecular biomonitoring. Methods Ecol Evol 2018. [DOI: 10.1111/2041-210x.12960] [Citation(s) in RCA: 77] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Valentin Vasselon
- CARRTELFrench National Institute for Agricultural Research (INRA)University of Savoie Mont Blanc Thonon‐les‐Bains France
| | - Agnès Bouchez
- CARRTELFrench National Institute for Agricultural Research (INRA)University of Savoie Mont Blanc Thonon‐les‐Bains France
| | - Frédéric Rimet
- CARRTELFrench National Institute for Agricultural Research (INRA)University of Savoie Mont Blanc Thonon‐les‐Bains France
| | - Stéphan Jacquet
- CARRTELFrench National Institute for Agricultural Research (INRA)University of Savoie Mont Blanc Thonon‐les‐Bains France
| | - Rosa Trobajo
- Aquatic EcosystemsInstitute for Food and Agricultural Research and Technology (IRTA) Catalunya Spain
| | - Méline Corniquel
- CARRTELFrench National Institute for Agricultural Research (INRA)University of Savoie Mont Blanc Thonon‐les‐Bains France
| | - Kálmán Tapolczai
- CARRTELFrench National Institute for Agricultural Research (INRA)University of Savoie Mont Blanc Thonon‐les‐Bains France
| | - Isabelle Domaizon
- CARRTELFrench National Institute for Agricultural Research (INRA)University of Savoie Mont Blanc Thonon‐les‐Bains France
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Tapolczai K, Bouchez A, Stenger-Kovács C, Padisák J, Rimet F. Taxonomy- or trait-based ecological assessment for tropical rivers? Case study on benthic diatoms in Mayotte island (France, Indian Ocean). Sci Total Environ 2017; 607-608:1293-1303. [PMID: 28738506 DOI: 10.1016/j.scitotenv.2017.07.093] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2017] [Revised: 06/29/2017] [Accepted: 07/11/2017] [Indexed: 06/07/2023]
Abstract
Diatom-based ecological quality assessment methods have been implemented and used regularly in the Water Framework Directive. These indices use the species' abundance profiles along a specific environmental gradient, which they aim to assess. However, this approach has several problematic issues including the unstable and fast-changing diatom taxonomy. The use of traits can be a solution if their responses to the environmental pressure are well-defined. Here, we developed taxonomy-based and trait-based diatom assemblage indices to assess the ecological status of riverine sites on a tropical island. The two indices are based on two sub-indices that measure the diatom assemblage response to a nutrient and organic matter/turbidity gradient. Both taxonomy- and trait-based indices correlated significantly with the selected environmental gradients of the test database, which was not used during index development. We showed that traits could be used for quality assessment of the Mayotte rivers and require much less effort than taxonomy-based indices. There were differences between the two types of indices, which are discussed in this paper. As a perspective for further studies, tests of trait-based indices among different eco-regions would be challenging.
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Affiliation(s)
| | | | - Csilla Stenger-Kovács
- Department of Limnology, University of Pannonia, Egyetem u. 10, Veszprém 8200, Hungary
| | - Judit Padisák
- Department of Limnology, University of Pannonia, Egyetem u. 10, Veszprém 8200, Hungary; MTA-PE Limnoecology Research Group, Egyetem u. 10, Veszprém 8200, Hungary
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