The objective of this dataset is to compile 0.25 m2 quadrats and the abundance of macro-phytes covering area beneath these quadrats taken across the intertidal areas of the Tagus Es-tuary and Ria de Aveiro Coastal Lagoon over the boreal summer of 2022. The data recorded percentage cover of the seagrass (Zostera noltei (Hornemann 1832)) and macroalgae, Ulva sp., Chaetomorpha sp., Fucus vesiculosus (Linnaeus 1853) and Agarophyton vermiculophyllum (Ohmi Gurgel, J.N. Norris & Fredericq, 2018.) Quadrat photographs were taken between the 13th and 17th of June 2022. This dataset has been acquired to validate maps of the spatial dis-tribution of Zostera noltei obtained at the ecosystem scale with remote sensing images and notably Sentinel 2 with a 10 to 20 m pixel resolution. Therefore, some quadrats were spatially arranged to form a cross shape to fill a 10 m satellite pixel.
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 419 records.
1 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.
The table below shows only published versions of the resource that are publicly accessible.
How to cite
Researchers should cite this work as follows:
Davies B F R, Figueira R, Oiry S, Sousa A, Gernez P, Barillé L (2022): Benthic Intertidal Vegetation from the Tagus Estuary and Aveiro Lagoon. v1.2. No organisation. Dataset/Samplingevent. http://ipt.gbif.pt/ipt/resource?r=bentic-vegetation-tagus-aveiro&v=1.2
Researchers should respect the following rights statement:
The publisher and rights holder of this work is Université de Nantes. This work is licensed under a Creative Commons Attribution (CC-BY 4.0) License.
This resource has been registered with GBIF, and assigned the following GBIF UUID: 7b14790c-8ddf-4709-9596-c938f9d5dc11. Université de Nantes publishes this resource, and is itself registered in GBIF as a data publisher endorsed by GBIF France.
Samplingevent; Intertidal; Vegetation; Seagrass; Macroalgae; Portugal
- Metadata Provider ●
- Originator ●
- Point Of Contact
Atlantic Coast of Portugal. The Tagus Estuary, found on the Western Portuguese Coast, is the mouth of the longest river in the Iberian peninsula. The Estuary is protected by the Tagus Es-tuary Nature Reserve as an IUCN category IV habitat and species management area. Ria de Aveiro is a shallow coastal lagoon located on the North West coast of Portugal. The only connection to the Atlantic Ocean is through a narrow channel 1.3 km in length, 350 m wide and 20 m deep. Ria de Aveiro is a Long-Term Socio-Ecological Research (LTsER) platform (https://www.lterportugal.pt/riadeaveiro) with several important habitats, it is included in the Nature 2000 network and is classified as a Special Protection Area containing Sites of Com-munity Importance.
|Bounding Coordinates||South West [36.386, -12.92], North East [42.876, -6.064]|
The seagrass tracheophyta (Zostera noltei), the macroalgae ochrophyta Fucus vesiculosus and the rhodophyta Agarophyton vermiculophyllum were ranked to species level, while the chlorophytes Ulva sp. and Chaetomorpha sp. were ranked at the genus level. Nomenclature follows WoRMs (https://www.marinespecies.org).
|Class||Magnoliopsida (Angiosperms/Seagrasses), Phaeophyceae (Brown Algae), Ulvophyceae (Green Algae), Florideophyceae (Red Algae)|
|Start Date / End Date||2022-06-13 / 2022-06-17|
No Description available
|Title||Biodiversity of the Coastal Ocean: Monitoring with Earth Observation (BiCOME) | BioPradaRia - Restoration, management and conservation of biodiversity and biological re-sources associated with Ria de Aveiro seagrass ecosystems | PORBIOTA - Portuguese E-Infrastructure for Information and Research on Biodiversity|
|Identifier||BiCOME (FutureEO-1 BIODIVERSITY+PRECURSORS No. 4000135756/21/I-EF.) | BioPradaRia (MAR-01.04.02-FEAMP-0020) | PORBIOTA (POCI-01-0145-FEDER-022127)|
|Funding||This research was funded by a grant by the European Space Agency (ESA), and partially funded by the projects BioPradaRia (MAR-01.04.02-FEAMP-0020) (https://biopradaria.weebly.com) (Operational Program MAR2020, EMFF-European Maritime and Fisheries Fund, European Union, Portugal2020), and PORBIOTA (PO-CI-01-0145-FEDER-022127) (FCT - Fundação para a Ciência e a Tecnologia, supported by Operational Tematic Program for Competitiveness and Internationalization POCI (COM-PETE 2020) under the PORTUGAL 2020 Partnership Agreement through the European Re-gional Development Fund (FEDER).|
The personnel involved in the project:
Quadrats (0.25 m2) placed on benthic intertidal vegetation were photographed and images were loaded into ImageJ software. Polygons were drawn around visible extent of vegetation types, which allowed the percentage cover of each species or genus per quadrat to be calculated.
|Study Extent||Sampling was carried out across intertidal areas during low tide.|
|Quality Control||Images were analysed consistently, with 10% of images being checked by expert commentators. The dataset was adjusted to the Darwin Core specifications (Wieczorek et al. 2012) in order to be published in the GBIF network.|
Method step description:
- Quadrat Photographed alongside taking dGPS location (Trimble Geo 7).
- Wieczorek, J.; Bloom, D.; Guralnick, R.; Blum, S.; Döring, M.; Giovanni, R.; Robertson, T. & Vieglais D. (2012) Darwin Core: An evolving community-developed biodiversity data standard. PLOS One 7: e29715. https://doi.org/10.1371/journal.pone.0029715 https://doi.org/10.1371/journal.pone.0029715