MEDUSA: Marine benthic Ecological Data from Underwater imagery Surveys of sub-Antarctic Crozet environments ...

• Main Author: Lelièvre, Yann
• Format: Dataset
• Language: English
• Published: dataUBFC - Atelier de la donnée de Bourgogne-Franche-Comté 2024
• Subjects: biodiversity conservation; biodiversité, conservation; ecology; écologie; marine & freshwater biology; biologie marine - hydrobiologie; oceanography; océanographie; environmental sciences; sciences de l'environnement; Southern Ocean; Océan Austral; Subantarctic; Subantarctique; Crozet islands; Crozet, Îles; coastal habitats; habitats côtiers; benthic ecosystem; écosystème benthique; underwater imagery; imagerie sous-marine; faunal and algal communities; communautés fauniques et algales; ecosystems monitoring; suivi des écosystèmes; environmental change; changement environnemental; Ile de la Possession; name=Ile de la Possession;projection=WGS84;northlimit=-46.32;eastlimit=51.92;southlimit=-46.5;westlimit=51.6;units=°; HA04-Crozet-2021; name=HA04-Crozet-2021;start=2021-11-04;end=2021-11-09; HA04-Crozet-2022; name=HA04-Crozet-2022;start=2022-11-23;end=2022-11-24; Actinopterygii; Annelida; Anthozoa; Arthropoda; Ascidiacea; Asteroidea; Bivalvia; Brachiopoda; Chlorophyta; Chordata; Cnidaria; Demospongiae; Echinodermata; Echinoidea; Florideophyceae; Gastropoda; Antarc*; Antarctic; Crozet Islands
• Online Access: https://dx.doi.org/10.25666/dataubfc-2024-03-15; https://search-data.ubfc.fr/FR-13002091000019-2024-03-15_MEDUSA-Marine-benthic-Ecological-Data-from.html

Inscribed on the UNESCO World Heritage list, the sub-Antarctic Crozet archipelago is located in a region facing significant environmental changes impacting a poorly known marine biodiversity. Underwater imagery constitutes a valuable non-invasive approach for gathering ecological data and improving our knowledge of ecosystems’ vulnerability. We here compiled two datasets, encompassing 17 video-imagery surveys of Crozet nearshore environments conducted in 2021 and 2022 at two sites of Ile de la Possession: Baie du Marin and Crique du Sphinx. Faunal abundance and algal cover data related to each survey are also provided. A total of 755 images were analysed, comprising 52 faunal and 14 algal taxa identified in 2021, as well as 45 faunal and 14 algal taxa identified in 2022. Video-transects were performed in shallow waters by scuba divers using a GoPro®HERO7 multiple camera set-up, and in deeper waters using a remotely operated vehicle. These data provide a first baseline for biodiversity and ecosystem studies, ... : Audience: General, Research, Policy maker ...