Description
Enregistrements de données
Les données de cette ressource données d'échantillonnage ont été publiées sous forme dune Archive Darwin Core (Darwin Core Archive ou DwC-A), le format standard pour partager des données de biodiversité en tant quensemble dun ou plusieurs tableurs de données. Le tableur de données du cœur de standard (core) contient 122 enregistrements.
1 tableurs de données dextension existent également. Un enregistrement dextension fournit des informations supplémentaires sur un enregistrement du cœur de standard (core). Le nombre denregistrements dans chaque tableur de données dextension est illustré ci-dessous.
Cet IPT archive les données et sert donc de dépôt de données. Les données et métadonnées de la ressource sont disponibles pour téléchargement dans la section téléchargements. Le tableau des versions liste les autres versions de chaque ressource rendues disponibles de façon publique et permet de tracer les modifications apportées à la ressource au fil du temps.
Versions
Le tableau ci-dessous naffiche que les versions publiées de la ressource accessibles publiquement.
Droits
Les chercheurs doivent respecter la déclaration de droits suivante:
L’éditeur et détenteur des droits de cette ressource est TotalEnergies. Ce travail est sous licence Creative Commons Attribution Non Commercial (CC-BY-NC) 4.0.
Enregistrement GBIF
Cette ressource a été enregistrée sur le portail GBIF, et possède lUUID GBIF suivante : 30ca25d8-fce4-4d1f-ae3f-c0650826f84e. TotalEnergies publie cette ressource, et est enregistré dans le GBIF comme éditeur de données avec lapprobation du GBIF France.
Mots-clé
Samplingevent; TotalEnergies; TEEPSA; Block 5/6/7; South Africa; EBS; 2022; Marine Mammal; Benthic; Zooplankton; phytoplankton
Contacts
- Créateur
- 3rd Floor – Tygervalley Chambers 2 27 Willie Van Schoor Avenue
- +27210034060
- Personne De Contact
- Environmental Coordinator
- 3rd Floor – Tygervalley Chambers 2 27 Willie Van Schoor Avenue
- +27210034060
- Utilisateur
- Biodiversity Coordinator
- 3rd Floor – Tygervalley Chambers 2 27 Willie Van Schoor Avenue, Bellville 7530 -– South Africa
- +27210034060
Couverture géographique
Multiblock Regional, Environmental Baseline Survey, Block 567, South Africa.
| Enveloppe géographique | Sud Ouest [-90, -180], Nord Est [90, 180] |
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Couverture taxonomique
N/A
| Kingdom | Animalia |
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| Phylum | Chordata |
| Class | Mammalia |
| Order | Testudines, Cetartiodactyla |
| Family | Balaenopteridae, Delphinidae, Physeteridae, Cheloniidae |
Couverture temporelle
| Date de début / Date de fin | 2022-11-09 / 2022-11-26 |
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Données sur le projet
Pas de description disponible
| Titre | Environmental Baseline Study, Block 567 South Africa – 2022 – TotalEnergies E&P South Africa (TEEPSA) |
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| Financement | TotalEnergies E&P South Africa (TEEPSA) contracted Benthic Solutions Limited (BSL) for the provision of an Environmental Baseline Study (EBS) within Block 5/6/7 located off the southwest coast of South Africa. |
| Description du design | Methodology
Marine mammal :
The survey included opportunistic observations of marine megafauna by marine mammal observations (MMO) and passive accoustic monitoring (PAM).
Benthic macrofauna :
49 stations was sampled with a 0.25 m^2 Grey O’Hara box corer at Block 5/6/7 in South Africa for the Environmental Baseline Study by TotalEnergies E&P South Africa (TEEPSA). Infauna were subsambled by a small frame, comprising an area of 0.1m^2. Station depths ranged between 677 to 3115 meters. Sediment Particle Size analyses undertaken for each sampling event.
Zooplancton & phytoplancton :
Planktonic organisms were collected at 5 stations in the block 5/6/7, located between the Benguela current and the Agulhas current, in close proximity to the southern Benguela upwelling ecosystem. At each sampling station, a net with a mesh of 50 µm and another with a mesh of 200 µm were deployed vertically, from 100 m depth to the surface to collect plankton. Samples collected with the 50 µm net were fixed with lugol (2 % final concentration) and analysed using a Flowcan, while samples collected with the 200 µm net were fixed with formol (4 % final concentration) and analysed using a Zooscan. The Flowcam and Zooscan are imagery devices that are used to get pictures of plankton organisms as well as morphometric measurements. Pictures of the organisms were then uploaded on the Ecotaxa platform to get identified by a machine learning algorithm first before being validated by experts in plankton taxonomy. (https://ecotaxa.obs-vlfr.fr/) and sorted by experts into taxonomical taxa. Only living planktonic organisms were kept, therefore the “non-living”, “detritus”, “dead”, “seaweed” categories were removed. Non-identified objects labelled as “othertocheck”, “duplicate”, “multiple” were also removed from the dataset. The “egg” category was also subsided from the analysis since net sampling is not the most suitable way to efficiently collect plankton eggs.
Abundances of the organisms were estimated based on the number of pictures collected and the volume of water filtered by the nets during sampling to obtain a number of individuals m-3 for large organisms collected with the 200 µm net, and individuals or cells L-1 for smaller ones collected with the 50 µm net. However, before abundances were computed, the category “part”, that corresponds to parts of damaged organisms, was removed from the dataset to avoid any overestimation. The same principle was also applied for specific organisms that can easily be damaged and are routinely identified in distinct parts categories. For instance, Appendicularia, which are fragile organisms that can easily be damaged during sampling, were often identified from parts, notably the head, the tail, or the trunk (the head with a part of the tail). To avoid overestimation of their abundances, only the category “tail |
Métadonnées additionnelles
| Identifiants alternatifs | https://ipt.gbif.fr/resource?r=block-567-2022 |
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