Description
This dataset is based on the Atlas of Freshwater Bivalves in Mainland Portugal published by ICNF in 2006. It presents occurrence data of native and exotic freshwater bivalves on water bodies in hundreds of sampling stations at Mainland Portugal, from 2001 to 2004. There are records of 12 native species and one exotic with confirmed occurrence in Portugal, namely Corbicula fluminea (O. F. Müller, 1774). The project "Atlas of freshwater bivalves in mainland Portugal" was coordinated by Joaquim Reis and involved the participation of several individual and institutional collaborators.
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 3,167 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:
Reis J, Breves A (2021): Atlas of Freshwater Bivalves 2007. v1.1. ICNF - Instituto da Conservação da Natureza e das Florestas. Dataset/Occurrence. http://ipt.gbif.pt/ipt/resource?r=atlas_bivalves_2007&v=1.1
Rights
Researchers should respect the following rights statement:
The publisher and rights holder of this work is ICNF - Instituto da Conservação da Natureza e das Florestas. This work is licensed under a Creative Commons Attribution (CC-BY 4.0) License.
GBIF Registration
This resource has been registered with GBIF, and assigned the following GBIF UUID: 49f3138e-28c2-4a74-8950-cf8a0ecc1840. ICNF - Instituto da Conservação da Natureza e das Florestas publishes this resource, and is itself registered in GBIF as a data publisher endorsed by GBIF Portugal.
Keywords
Occurrence; Atlas; Bivalvia; Mainland Portugal; Portuguese river basins; Observation
External data
The resource data is also available in other formats
Metadados | https://sig.icnf.pt/portal/sharing/rest/content/items/66dc9514332647b986c00f5adfff32e9/info/metadata/metadata.xml?format=default&output=html UTF-8 html |
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Shapefile | http://si.icnf.pt/shp/atlas_bivalves_2007 UTF-8 shapefile |
KML | http://si.icnf.pt/kml/atlas_bivalves_2007 UTF-8 kml |
WFS | http://si.icnf.pt/wfs/atlas_bivalves_2007 UTF-8 shapefile |
WMS | http://si.icnf.pt/wms/atlas_bivalves_2007 UTF-8 wms |
Metadados | https://geocatalogo.icnf.pt/metadados/atlas_bivalves_2007.html UTF-8 html |
Contacts
- Originator
- Metadata Provider
- Point Of Contact
- Point Of Contact
Geographic Coverage
Mainland Portugal. There is also some cross-border data, with records in Spain.
Bounding Coordinates | South West [37.143, -9.347], North East [42.141, -6.27] |
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Taxonomic Coverage
The Atlas of Bivalves recorded data of 13 freshwater species of Bivalvia in 03 orders and 04 families. All the bivalves were identified up to the species level.
Kingdom | Animalia |
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Phylum | Mollusca |
Class | Bivalvia |
Order | Unionida, Venerida, Sphaeriida |
Family | Unionidae, Cyrenidae, Margaritiferidae, Sphaeriidae |
Species | Anodonta anatina (Duck mussel), Anodonta cygnea (Swan mussel), Potomida littoralis, Unio delphinus, Unio tumidiformis, Margaritifera margaritifera (Freshwater pearl mussel), Pisidium casertanum (Ubiquitous peaclam), Pisidium milium (Quadrangular pillclam), Pisidium nitidum (Shining pea mussel), Pisidium personatum (Red-crusted pea mussel), Pisidium subtruncatum (Short-end Peaclam), Musculium lacustre (Lake Orb-Mussel), Corbicula fluminea (Asian clam) |
Temporal Coverage
Start Date / End Date | 2001-01-01 / 2004-01-01 |
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Project Data
The project “Atlas dos bivalves de água doce em Portugal continental” aimed to assess the distribution of freshwater bivalves in mainland Portugal. The distribution is related to 13 species, being 12 natives and one exotic in the country.
Title | Atlas dos bivalves de água doce em Portugal continental |
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Identifier | POA 1.100021 |
Funding | This work was co-fund by ICNF, I.P. and the European Union, through the Environment Operational Programme (application 1.1/00021– Documentos Estruturantes da Conservação da Natureza e da Biodiversidade). The preparation of this resource for publication through GBIF was supported by Project PORBIOTA—Portuguese E-Infrastructure for Information and Research on Biodiversity (POCI-01-0145-FEDER-022127), under the Operational Thematic Program for Competitiveness and Internationalization (POCI), under the PORTUGAL 2020 Partnership Agreement, through the European Regional Development Fund (FEDER) and FCT. |
The personnel involved in the project:
- Point Of Contact
Sampling Methods
The data was obtained for the elaboration of the Atlas, with the survey of the species distribution at Mainland Portugal. At each location the survey of the freshwater bivalves were performed using specific techniques for detecting their presence or absence. Whenever possible, the abundance of each species was assessed. Data collection of the occurrence was also based on previous publications. All data was inserted in a specific database build for the project.
Study Extent | The geographic area considered for the study was Mainland Portugal. Since there is some cross-border data, some registers were made in Spain. |
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Quality Control | All initial data was inserted in a specific relational database built specifically for the project, which implemented several quality control methods. In the preparation of the dataset for GBIF publication, data consistency was verified using cluster algorithms using OpenRefine. |
Method step description:
- The dataset presents information of the occurrence status (presence or absence) of the species in each location. There are also classes of abundance for these species, as following: absent = value 0; rare = value 1; common = value 2; abundant = value 3; very abundant = value 4. In some cases, the presence of a species was recorded in a locality, however was not possible to assess its abundance. Aggregation of original data from several sources (see above) into a purpose specific relational database built for the project. For details, see Reis (2006). The preparation of the dataset for GBIF publication used as source the geographic layer in shapefile format. The data layer was a vector layer containing points. The following steps were performed: - Conversion of the spatial layer to geographic coordinates using WGS84 as reference system; - Used the points to determine the locations based on the Carta Administrativa Oficial de Portugal 2020 (CAOP2020) and OpenStreetMaps; - Exported to csv, unpivot the data in the table and reinterpreted attributes matching to DwC standard terms.
Bibliographic Citations
- Reis, Joaquim (coord.) 2006. Atlas dos bivalves de água doce em Portugal continental. Instituto da Conservação da Natureza. Lisboa. 130 pp.
Additional Metadata
Alternative Identifiers | http://ipt.gbif.pt/ipt/resource?r=atlas_bivalves_2007 |
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