Description
The dataset describes the megabenthic biodiversity that has been recorded in five locations at the upper mesophotic zone of the National Marine Park of Alonissos Northern Sporades. The expedition ran in the summer of 2021 with a focus on the study of the structure of the octocoral habitats with emphasis on the forests of Eunicella cavolini and Paramuricea clavata. Non-invasive methods have been applied to collect the relevant information. This includes 4K GoPro cameras with lights and scaled laser beams along with an underwater camera system with strobes. The provided dataset is preliminary and far from being considered complete; however, it sets the foundation for new information to be added in future expeditions.
Data Records
The data in this sampling event resource has been published as a Darwin Core Archive (DwC-A), which is a standardized format for sharing biodiversity data as a set of one or more data tables. The core data table contains 5 records.
2 extension data tables also exist. An extension record supplies extra information about a core record. The number of records in each extension data table is illustrated below.
This IPT archives the data and thus serves as the data repository. The data and resource metadata are available for download in the downloads section. The versions table lists other versions of the resource that have been made publicly available and allows tracking changes made to the resource over time.
Versions
The table below shows only published versions of the resource that are publicly accessible.
How to cite
Researchers should cite this work as follows:
Giovanni Chimienti, Michela Maiorca, Markos Digenis, Dimitris Poursanidis. Conservation status of upper-mesophotic octocoral habitats at Sporades Archipelago (Aegean Sea), 2023
Rights
Researchers should respect the following rights statement:
The publisher and rights holder of this work is Hellenic Center for Marine Research. This work is licensed under a Creative Commons Attribution (CC-BY 4.0) License.
GBIF Registration
This resource has not been registered with GBIF
Keywords
Metadata; Biodiversity; gorgonians; upper-mesophotic; octocoral; Northern Sporades; Aegean Sea
Contacts
- Metadata Provider ●
- Originator ●
- Point Of Contact
- Content Provider
- Content Provider
- Custodian Steward
Geographic Coverage
National Marine Park of Alonissos Northern Sporades (Aegean Sea, Greece)
| Bounding Coordinates | South West [39.011, 22.906], North East [39.593, 24.532] |
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Taxonomic Coverage
Algae, Ascidiacea, Bryozoa, Cnidaria, Crustacea, Echinodermata, Mollusca, Pisces, Polychaeta, Porifera
| Phylum | Bryozoa, Cnidaria, Echinodermata, Mollusca, Porifera |
|---|---|
| Subphylum | Crustacea |
| Superclass | Pisces |
| Class | Ascidiacea, Polychaeta |
Temporal Coverage
| Start Date / End Date | 2021-06-20 / 2021-06-26 |
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Project Data
This work is part of the project “The Coral gardens of Alonnisos Northern Sporades Marine Park”, funded by the Thalassa Foundation. Without them, this work could not be possible. Special thanks to the Eforate of Undewater Antiquites for the special permission for Science Dive operations, to Panos Anagnostou and the Alonissos-Seacolours Dive center for the technical support and the Management Body of the Alonnisos Northern Sporades Marine Park for their support
| Title | “The Coral gardens of Alonnisos Northern Sporades Marine Park” |
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| Funding | Funded by the Thalassa Foundation. |
| Study Area Description | Alonnisos Northern Sporades Marine Park |
The personnel involved in the project:
Sampling Methods
Equipment used are GoPro cameras, Canon Cameras, Visual Census. During June 2021, technical scuba diving operations were carried out at every site to verify the occurrence of coral forests and perform noninvasive monitoring from 30 to 45 m depth, with qualitative explorations up to 60 m depth. Underwater videos were carried out using 4K cameras equipped with two video lights of 12,000 lm each and two parallel laser beams for scaling. Image analysis and processing for the coral forests were performed using ImageJ/Fiji software, and sampling units of 2.5 ± 0.2 m2 were defined along each transect, according to the minimal area used for the quantification of Mediterranean octocoral habitats.
| Study Extent | Octocoral forests created by the yellow sea fan Eunicella cavolini and the red sea fan Paramuricea clavata were studied at the National Marine Park of Alonissos Northern Sporades (Aegean Sea, Greece), between 30 and 45 m depth, in order to assess their conservation status and the occurrence of both natural and anthropogenic stressors. |
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| Quality Control | Taxonomic Data mapped to WoRMS. |
Method step description:
- Based on local knowledge and interviews with diving centers, five sites have been selected for the assessment of upper mesophotic coral forests. Three of them are located in the straits of Skopelos–Alonnisos, at Agios Georgios islet and Mikro islet, and at the tip of Fanari in Alonnisos. Two more sites are located 1.5 nautical miles northeast of Dyo Adelfia islet, at the so-called Barketa reef, and off the twin islets Moro and Moules.
Bibliographic Citations
- Giovanni Chimienti, Michela Maiorca, Markos Digenis, Dimitris Poursanidis, Conservation status of upper-mesophotic octocoral habitats at Sporades Archipelago (Aegean Sea), Marine Pollution Bulletin, Volume 190, 2023, 114868, ISSN 0025-326X, https://doi.org/10.1016/j.marpolbul.2023.114868.
Additional Metadata
| Alternative Identifiers | http://ipt.medobis.eu/resource?r=uppermesophotic |
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