The Origin of the Matter Matters: The Influence of Terrestrial Inputs on Coastal Benthic Microeukaryote Communities Revealed by eDNA
ABSTRACT Estuaries are a key component of the land‐sea continuum, and their microbial diversity depends on the connection with terrestrial ecosystems. This work aimed to demonstrate that the terrestrial matter carried by rivers influences the structuration of microeukaryote communities of superficia...
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Wiley
2024-11-01
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| Series: | Environmental DNA |
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| Online Access: | https://doi.org/10.1002/edn3.70041 |
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| author | Mathisse Meyneng Raffaele Siano Naïna Mouras Dominique Ansquer Christine Laporte‐Magoni Florence Antypas Thomas Haize Hugues Lemonnier |
| author_facet | Mathisse Meyneng Raffaele Siano Naïna Mouras Dominique Ansquer Christine Laporte‐Magoni Florence Antypas Thomas Haize Hugues Lemonnier |
| author_sort | Mathisse Meyneng |
| collection | DOAJ |
| description | ABSTRACT Estuaries are a key component of the land‐sea continuum, and their microbial diversity depends on the connection with terrestrial ecosystems. This work aimed to demonstrate that the terrestrial matter carried by rivers influences the structuration of microeukaryote communities of superficial (0–3 cm) sediments collected at the interface between the land and marine coastal areas. To demonstrate this hypothesis, we have chosen the main island of New Caledonia as a study site, a French overseas territory located in the South West Pacific. Using amplicon sequencing of the 18S‐V4 rDNA extracted from sediments, we analyzed microeukaryote community composition in relation to numerous environmental parameters. Samples were collected in five bays influenced by riverine inputs and corresponding to distinct geological features of the watersheds, as revealed by high variations in metal concentrations released from specific minerals in the sediment. Particularly, the influence of ultramafic soils was highlighted by higher nickel concentration (correlated to Co, Cr, Mn, and Fe). Diatoms were the dominant taxonomic group, especially the classes of Bacillariophyceae and Mediophyceae. Then Apicomplexa, Ciliophora, Dinoflagellata, and Cercozoa followed. The metallic composition of the sediment explained 18.46% of the community spatial variability. The selection of ASVs based on their contribution to beta diversity and their correlation with metallic concentrations enabled us to identify spatial patterns. This information could lead to identifying microeukaryote bioindicators of terrestrial influences, particularly of ultramafic origin. We hypothesized that the association between microeukaryotes and metallic compositions is linked to selection processes, given the resistance of some microeukaryotes to some high metallic concentrations. In vitro experiments are needed to confirm this hypothesis. Our results emphasized the role of terrestrial inputs in shaping estuarine diversity and the need to consider the entire land–sea continuum for studying these ecosystems. |
| format | Article |
| id | doaj-art-bdbd7d8952ee4bfdbc5d360ae49f7e23 |
| institution | Kabale University |
| issn | 2637-4943 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | Wiley |
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| series | Environmental DNA |
| spelling | doaj-art-bdbd7d8952ee4bfdbc5d360ae49f7e232025-01-29T05:11:50ZengWileyEnvironmental DNA2637-49432024-11-0166n/an/a10.1002/edn3.70041The Origin of the Matter Matters: The Influence of Terrestrial Inputs on Coastal Benthic Microeukaryote Communities Revealed by eDNAMathisse Meyneng0Raffaele Siano1Naïna Mouras2Dominique Ansquer3Christine Laporte‐Magoni4Florence Antypas5Thomas Haize6Hugues Lemonnier7IFREMER, DYNECO Plouzané FranceIFREMER, DYNECO Plouzané FranceFrench Institute for Research in the Science of the Sea (IFREMER), Research Institute for Development (IRD), University of New Caledonia, University of Reunion CNRS, UMR 9220 ENTROPIE Nouméa New CaledoniaFrench Institute for Research in the Science of the Sea (IFREMER), Research Institute for Development (IRD), University of New Caledonia, University of Reunion CNRS, UMR 9220 ENTROPIE Nouméa New CaledoniaInstitute of Exact and Applied Sciences University of New Caledonia Nouméa New CaledoniaFrench Institute for Research in the Science of the Sea (IFREMER), Research Institute for Development (IRD), University of New Caledonia, University of Reunion CNRS, UMR 9220 ENTROPIE Nouméa New CaledoniaFrench Institute for Research in the Science of the Sea (IFREMER), Research Institute for Development (IRD), University of New Caledonia, University of Reunion CNRS, UMR 9220 ENTROPIE Nouméa New CaledoniaFrench Institute for Research in the Science of the Sea (IFREMER), Research Institute for Development (IRD), University of New Caledonia, University of Reunion CNRS, UMR 9220 ENTROPIE Nouméa New CaledoniaABSTRACT Estuaries are a key component of the land‐sea continuum, and their microbial diversity depends on the connection with terrestrial ecosystems. This work aimed to demonstrate that the terrestrial matter carried by rivers influences the structuration of microeukaryote communities of superficial (0–3 cm) sediments collected at the interface between the land and marine coastal areas. To demonstrate this hypothesis, we have chosen the main island of New Caledonia as a study site, a French overseas territory located in the South West Pacific. Using amplicon sequencing of the 18S‐V4 rDNA extracted from sediments, we analyzed microeukaryote community composition in relation to numerous environmental parameters. Samples were collected in five bays influenced by riverine inputs and corresponding to distinct geological features of the watersheds, as revealed by high variations in metal concentrations released from specific minerals in the sediment. Particularly, the influence of ultramafic soils was highlighted by higher nickel concentration (correlated to Co, Cr, Mn, and Fe). Diatoms were the dominant taxonomic group, especially the classes of Bacillariophyceae and Mediophyceae. Then Apicomplexa, Ciliophora, Dinoflagellata, and Cercozoa followed. The metallic composition of the sediment explained 18.46% of the community spatial variability. The selection of ASVs based on their contribution to beta diversity and their correlation with metallic concentrations enabled us to identify spatial patterns. This information could lead to identifying microeukaryote bioindicators of terrestrial influences, particularly of ultramafic origin. We hypothesized that the association between microeukaryotes and metallic compositions is linked to selection processes, given the resistance of some microeukaryotes to some high metallic concentrations. In vitro experiments are needed to confirm this hypothesis. Our results emphasized the role of terrestrial inputs in shaping estuarine diversity and the need to consider the entire land–sea continuum for studying these ecosystems.https://doi.org/10.1002/edn3.70041estuariesland–sea interfacemarine sedimentsmetalsNew Caledonia |
| spellingShingle | Mathisse Meyneng Raffaele Siano Naïna Mouras Dominique Ansquer Christine Laporte‐Magoni Florence Antypas Thomas Haize Hugues Lemonnier The Origin of the Matter Matters: The Influence of Terrestrial Inputs on Coastal Benthic Microeukaryote Communities Revealed by eDNA Environmental DNA estuaries land–sea interface marine sediments metals New Caledonia |
| title | The Origin of the Matter Matters: The Influence of Terrestrial Inputs on Coastal Benthic Microeukaryote Communities Revealed by eDNA |
| title_full | The Origin of the Matter Matters: The Influence of Terrestrial Inputs on Coastal Benthic Microeukaryote Communities Revealed by eDNA |
| title_fullStr | The Origin of the Matter Matters: The Influence of Terrestrial Inputs on Coastal Benthic Microeukaryote Communities Revealed by eDNA |
| title_full_unstemmed | The Origin of the Matter Matters: The Influence of Terrestrial Inputs on Coastal Benthic Microeukaryote Communities Revealed by eDNA |
| title_short | The Origin of the Matter Matters: The Influence of Terrestrial Inputs on Coastal Benthic Microeukaryote Communities Revealed by eDNA |
| title_sort | origin of the matter matters the influence of terrestrial inputs on coastal benthic microeukaryote communities revealed by edna |
| topic | estuaries land–sea interface marine sediments metals New Caledonia |
| url | https://doi.org/10.1002/edn3.70041 |
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