Description
The GreekMarineICAS geodataset was created as part of the project ALAS: Aliens in the Aegean – A Sea Under Siege project (https://alas.edu.gr/), with the aim to assess the spatial extent and potential impacts of alien species in the Aegean Sea, and to improve our understanding of the mechanisms driving the impacts of invasive alien species on native marine ecosystems. Methodology of data compilation: Initially, an ICAS catalogue was created, including species classified as of high impact in the European Alien Species Information Network (EASIN), or as invasive or of high impact in recent review papers. A thorough search was conducted to look for information on the presence of these species in the Greek Seas. Georeferenced data, along with information on the reported date / year of sighting, depth range, abundance and habitat type were compiled using all available types of data sources, including published scientific literature, grey literature (e.g., theses, technical reports, and newspaper reports), offline databases (including records from past projects of universities, research institutes, the ELNAIS database, and citizen science initiatives), online scientific or citizen science databases (Algaebase, GBIF, OBIS, iNaturalist - only research-grade data), social networks (e.g., Instagram and Facebook), as well as through field work involving scientific diving and interviews with marine scientists, fishers and divers that were carried out during the ALAS project. In situ underwater sampling during the ALAS project was carried out in 2020 at 156 sites, and all sampling was conducted using non-destructive visual sampling techniques via SCUBA or free diving, down to a maximum of 20 m depth. Moreover, an unstructured interview approach was applied during the respective interviews with marine scientists, fishers and divers, while a photographic guide of the targeted ICAS was produced and provided during the interviews to enhance the species verification process. Information from social networks was specifically retrieved from the websites of diving centers, which were thoroughly checked for images of ICAS, and once relevant images were found the corresponding information was further validated through direct communication. All data were organized within an Excel spreadsheet and all duplicate records were deleted.
Data Records
The data in this occurrence 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 5,398 records.
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:
Sini M, Ragkousis M, Koukourouvli N, Katsanevakis S, Zenetos A (2024). Marine impactful cryptogenic and alien species in the Greek Seas: A georeferenced dataset (1893-2020). Version 2.0. Hellenic Center for Marine Research. Occurrence dataset. https://doi.org/10.25607/t2smha
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
Occurrence; biological invasions; non-indigenous species; Mediterranean Sea; introduced and exotic species; Observation
Contacts
- Metadata Provider ●
- Originator ●
- Point Of Contact
https://orcid.org/https://orcid.org/0000-0002-9608-3503
- Originator
- Originator
- Originator
- Custodian Steward
- Custodian Steward
Geographic Coverage
The GreekMarineICAS geodataset covers all coastal waters of the Aegean, Levantine, Ionian, and Adriatic Seas that are included within the Greek reporting obligations under the Marine Reporting Units of the Marine Strategy Framework Directive of the European Union Seas (collectively referred to as the Greek Seas).
| Bounding Coordinates | South West [34.38, 19.116], North East [41.443, 30.146] |
|---|
Taxonomic Coverage
60 marine ICAS (56 alien and 4 cryptogenic) belonging to 14 phyla, namely Chordata-Teleostei (16 species), Mollusca (14), Arthropoda (seven), Rhodophyta (four), Chlorophyta (three), Chordata – Tunicata (three), Annelida (two), Bryozoa (two), Echinodermata (two), Cnidaria-Anthozoa (one), Cnidaria – Scyphozoa (one), Ctenofora (one), Foraminifera (one), Ochrophyta (one), Porifera (one), Tracheophyta (one).
| Phylum | Mollusca, Arthropoda, Rhodophyta, Chlorophyta, Annelida, Bryozoa, Echinodermata, Ctenophora, Foraminifera, Ochrophyta, Porifera, Tracheophyta |
|---|---|
| Subphylum | Tunicata, Anthozoa |
| Class | Teleostei, Scyphozoa |
Temporal Coverage
| Start Date / End Date | 1893-01-01 / 2020-12-31 |
|---|
Project Data
The GreekMarineICAS geodataset was created as part of the project ALAS: Aliens in the Aegean – A Sea Under Siege project (https://alas.edu.gr/), with the aim to assess the spatial extent and potential impacts of alien species in the Aegean Sea, and to improve our understanding of the mechanisms driving the impacts of invasive alien species on native marine ecosystems.
| Title | ALAS: Aliens in the Aegean – A Sea Under Siege project |
|---|---|
| Identifier | https://alas.edu.gr/ |
| Study Area Description | Greek Seas |
Sampling Methods
Methodology of data compilation: Initially, an ICAS catalogue was created, including species classified as of high impact in the European Alien Species Information Network (EASIN), or as invasive or of high impact in recent review papers. A thorough search was conducted to look for information on the presence of these species in the Greek Seas. Georeferenced data, along with information on the reported date / year of sighting, depth range, abundance and habitat type were compiled using all available types of data sources, including published scientific literature, grey literature (e.g., theses, technical reports, and newspaper reports), offline databases (including records from past projects of universities, research institutes, the ELNAIS database, and citizen science initiatives), online scientific or citizen science databases (Algaebase, GBIF, OBIS, iNaturalist - only research-grade data), social networks (e.g., Instagram and Facebook), as well as through field work involving scientific diving and interviews with marine scientists, fishers and divers that were carried out during the ALAS project. In situ underwater sampling during the ALAS project was carried out in 2020 at 156 sites, and all sampling was conducted using non-destructive visual sampling techniques via SCUBA or free diving, down to a maximum of 20 m depth. Moreover, an unstructured interview approach was applied during the respective interviews with marine scientists, fishers and divers, while a photographic guide of the targeted ICAS was produced and provided during the interviews to enhance the species verification process. Information from social networks was specifically retrieved from the websites of diving centers, which were thoroughly checked for images of ICAS, and once relevant images were found the corresponding information was further validated through direct communication.
| Study Extent | Greek Seas |
|---|---|
| Quality Control | For taxonomy, the WoRMS has been used and for localities the Marine Region Gazetteer |
Method step description:
- All data were organized within an Excel spreadsheet and all duplicate records were deleted.
Bibliographic Citations
- Ragkousis M., Sini M., Koukourouvli N., Zenetos A., Katsanevakis S. (2023). Invading the Greek Seas: spatiotemporal patterns of marine impactful alien and cryptogenic species. Diversity 15, 353. doi: 10.3390/d15030353 doi: 10.3390/d15030353
- Tsirintanis K., Sini M., Ragkousis M., Zenetos A., Katsanevakis S. (2023). Cumulative negative impacts of invasive alien species on marine ecosystems of the Aegean Sea. Biology 12(7), 933. doi: 10.3390/biology12070933 doi: 10.3390/biology12070933
Additional Metadata
| Alternative Identifiers | 10.25607/t2smha |
|---|---|
| http://ipt.medobis.eu/resource?r=greekmarineicas_geodataset |