a506089e-5ff6-4f0d-b85c-51de31f18006 Lo-Yat Alain IFREMER PDG-DGDS-RBE-RMPF Alain.Lo.Yat@ifremer.fr pointOfContact 2026-05-27T09:55:37.301585Z ISO 19115-3 - SEXTANT 1.0 0 false WGS 84 (EPSG:4326) EPSG 8.6 16S and 18S V4 rRNA metabarcoding sequencing of bacterial, archaeal, and eukaryote communities in benthic sediment sampled along a geographical gradient around a shrimp farm (Toahotu lagoon, French Polynesia) for the DEPOMOD-shrimp project, 2020-2024 2021-11-08 creation 2026-05-26 publication FR-330-715-368-00032-IFR_BIOINFO_SEARSE_METABARCODING This work aims at describing benthic bacterial, archaeal, and metazoan communities along a geographical gradient to assess the effects of a shrimp farm (releasing organic matter such as uneaten feed and faecal pellets) on these communities. The samples were collected in several benthic stations from 0 m to 200 m from the farm cages, as well as in another station located several kilometers from the study area. This study includes two datasets: one based on 16S rRNA gene sequencing, which characterizes the bacterial and archaeal communities, and the other based on 18S rRNA gene sequencing, which describes the metazoan communities. Ifremer - Unité Ressources Marines en Polynésie IFREMER sismer@ifremer.fr publisher Moritz Charlotte CMOANA Consulting charlotte.moritz@gmail.com author Archambault Philippe Université Laval philippe.archambault@bio.ulaval.ca author Callier Myriam IFREMER PDG-DGDS-RBE-MARBEC-LAAAS 04 67 13 04 24 Myriam.Callier@ifremer.fr author Darinot-Thomas Sophie IFREMER sophie.darinot@gmail.com author Dorant Yann IFREMER PDG-DGDS-RBE-RMPF Yann.Dorant@ifremer.fr author Grant Cindy Université Laval cindy.grant@bio.ulaval.ca author Melina Grouazel IFREMER Melina.Grouazel@ifremer.fr author Lafille Marc-André DRM marc-andre.lafille@administration.gov.pf author Le Luyer Jeremy IFREMER PDG-DGDS-RBE-PHYTNESS 02 98 22 49 60 Jeremy.Le.Luyer@ifremer.fr author Menniti Christophe CEFREM menniti@univ-perp.fr author Mitta Guillaume IFREMER PDG-DGDS-RBE-RMPF Guillaume.Mitta@ifremer.fr author Nahon Sarah INRAE sarah.nahon@inrae.fr author Lo-Yat Alain IFREMER PDG-DGDS-RBE-RMPF Alain.Lo.Yat@ifremer.fr author https://sextant.ifremer.fr/geonetwork/srv/api/records/a506089e-5ff6-4f0d-b85c-51de31f18006/attachments/BioinfoMarine.png Habitats and biotopes GEMET - INSPIRE themes, version 1.0 2018-07-27T14:39:48 publication 2018-07-27 publication geonetwork.thesaurus.external.theme.httpinspireeceuropaeutheme-theme /Biological Environment/Bioinformatics Thèmes Sextant 2025-12-09 publication geonetwork.thesaurus.local.theme.sextant-theme Bioinformatics ODATIS aggregation parameters and Essential Variable names 2025-07-29 publication geonetwork.thesaurus.external.theme.NVS.OD1 Analysis data Type de jeux de donnée ODATIS 2025-12-09 publication geonetwork.thesaurus.local.theme.type_jeux_donnee CC-BY (Creative Commons - Attribution) grid utf8 -149.3329 -149.308934 -17.78005 -17.753247 2021-11-08 2022-03-28 /home/ref-bioinfo/ifremer/rmpf/DEPOMOD-shrimp NETWORK:LINK https://www.ebi.ac.uk/ena/browser/view/PRJEB113418 WWW:LINK ENA Publication https://doi.org/10.12770/a506089e-5ff6-4f0d-b85c-51de31f18006 DOI Digital Object Identifier (DOI) "To compare benthic bacterial, archaeal and metazoan communities (abundance, composition, etc.) around a shrimp farm (cages located in Toahotu lagoon, French Polynesia), sediment samples were collected around the farm and further south using a 0.1 m2 Van Veen grab. Twelve stations were located in the study area of the farm, from 0 to 200 m from the cages, and another station serving as a technical control was located several kilometers south of the farm (station X). For archaeal and bacterial DNA extractions (16S-dataset), three replicates of sediment were collected in three (unsieved) grabs (Ntotal = 9) at each station in clean 15 mL Flacon® tubes preserved on ice on the boat then frozen at -80°C at the laboratory. After thawing on ice, ~ 3 g of wet sediment from each sample were transferred into PowerBead® tubes, homogenised with 200 µL TrisEDTA, and DNA was extracted following instructions from the DNeasy Power Soil kit (Qiagen, CA, USA). DNA concentrations were verified with NanoDrop ND2000 (Thermo-Fisher) and DNA solutions were dried in 96-well plates using a SpeedVac for 4 hours, and frozen at -20°C. An amplicon library targeting the V4 region of the 16S rRNA gene for prokaryotes (~250–300 base pairs) was built using the following primers: 515F: 5′-GTG YCA GCM GCC GCG GTA A-3′ (Parada et al. 2016) and 806R: 5′-GGA CTA CNV GGG TWT CTA AT-3′ (Apprill et al. 2015). For metazoan DNA extractions (18S-dataset), three replicates of the material retained on the 0.5 mm sieve (Section 2.5) were collected in three grabs (Ntotal = 9) at each station in clean 15 mL Flacon® tubes preserved on ice on the boat then frozen at -80°C at the laboratory. Using the sieved material allowed to focus on target benthic fauna (infauna, endofauna, meiofauna and macrofauna) to improve the DNA signal. After thawing on ice, ~3 g of wet sediment from each sample were transferred into 2 mL Eppendorf® tubes and filled with distilled water, vortexed and centrifuged (5000 g, 24°C, 2 min). The supernatant was removed and the same operations were performed one more time, which allowed proper desalination of the samples. The material was then inserted into PowerBead tubes, homogenised with 200 µL TrisEDTA, and DNA was extracted following instructions from the DNeasy Power Soil kit (Qiagen, CA, USA). DNA preparation and sequencing followed the same procedure as described above, including extraction and PCR negative controls, after building a library targeting eukaryotes using the universal eukaryotic primers TAReuk454FWD: 5′-CCA GCA SCY GCG GTA ATT CC-3′ and TAReukREV3: 5′-ACT TTC GTT CTT GAT YRA-3′ (Hadziavdic et al. 2014) to amplify the V4 region (~380 base pairs) of the 18S rRNA gene. The libraries were then multiplexed (117 samples per run) and sequenced on an Illumina MiSeq platform using 250-bp paired-end reads at Génome Québec (Montréal, Canada). Extraction and PCR negative controls were included throughout the workflow to assess potential contamination."