EDP Foz Tua: Bivalvia – Complementary Studies [2011]

The dataset contains records of freshwater bivalves (Mollusca, Bivalvia) collected in the rivers Tua, Tuela and Rabaçal, in the scope of the Complementary Studies to the Environmental Impact Assessment of the Foz Tua Hydroelectric Dam, promoted by EDP – Energias de Portugal, S.A. Data were collected in July and October 2011, during field visits to 31 fixed stations.The main taxa targeted during the field visits were species from the families Unionidae, Margaritiferidae, Sphaeriidae and Cyrenidae.

Default

Identification

Alternate Identifier

08516469-1a7c-42fe-800b-f864d4521f71

Publication Date
2018-06-27
Title

EDP Foz Tua: Bivalvia – Complementary Studies [2011]

Abstract

The dataset contains records of freshwater bivalves (Mollusca, Bivalvia) collected in the rivers Tua, Tuela and Rabaçal, in the scope of the Complementary Studies to the Environmental Impact Assessment of the Foz Tua Hydroelectric Dam, promoted by EDP – Energias de Portugal, S.A. Data were collected in July and October 2011, during field visits to 31 fixed stations.The main taxa targeted during the field visits were species from the families Unionidae, Margaritiferidae, Sphaeriidae and Cyrenidae.

purpose

This dataset is part of a broader initiative whereby the company EDP - Energias de Portugal S.A. will made available biodiversity data collected during impact assessment and biological monitoring studies.

Dataset Language

ENGLISH

 
Dataset Creator
  BIOTA - Estudos e Divulgação em Ambiente, Lda - Joaquim Reis (Principal investigator)

ABC - Convento de São Miguel das Gaeiras

,

Óbidos

,

2510-718 Gaeiras

,

PORTUGAL

Dataset Creator
  BIOTA - Estudos e Divulgação em Ambiente, Lda - Patrícia Rodrigues (Researcher)

ABC - Convento de São Miguel das Gaeiras

,

Óbidos

,

2510-718 Gaeiras

,

PORTUGAL

Dataset Creator
  BIOTA - Estudos e Divulgação em Ambiente, Lda - Daniel Pires (Researcher)

ABC - Convento de São Miguel das Gaeiras

,

Óbidos

,

2510-718 Gaeiras

,
Dataset Creator
  AQUALOGUS - Engenharia e Ambiente, Lda. - Paulo Pinheiro (Manager)

Rua do Mar da China, Nº 1, Escritório 2.4, Parque das Nações

,

Lisboa

,

1990-137 Lisboa

,

PORTUGAL

Dataset Creator
  EDP - Energia de Portugal - João Madeira (Manager)

Av. 24 de Julho, 12, Torre Nascente, Piso 4

,

Lisboa

,

1249-300 Lisboa

,

PORTUGAL

Dataset Creator
Metadata Provider
  EDP - Energia de Portugal - João Madeira (Manager)

Av. 24 Julho, 12, Torre Nascente, Piso 4

,

Lisbon

,

1249-300 Lisboa

,

PORTUGAL

Associated Party

AUTHOR
  Aqualogus - Paulo Pinheiro (General coordination)

Rua do Mar da China, Nº 1, Escritório 2.4, Parque das Nações

,

Lisboa

,

PORTUGAL

Dataset Contact
  EDP - Energia de Portugal - João Madeira (Manager)

Av. 24 Julho, 12, Torre Nascente, Piso 4

,

Lisbon

,

1249-300 Lisboa

,

PORTUGAL

Keywords (GBIF Dataset Type Vocabulary: http://rs.gbif.org/vocabulary/gbif/dataset_type.xml)

  • Occurrence; Observation; freshwater bivalves; Bivalvia; Unio delphinus; Anodonta anatina; Margaritifera margaritifera; Potomida littoralis; Corbicula fluminea; Sphaerium corneum

  • Pisidium casertanum

  • Pisidium subtruncatum

  • Pisidium personatum

Geographic Coverage

Geographic Description

The data was collected at 30 field stations along the valleys of rivers Tua, Tuela and Rabaçal (Northeast Portugal, Europe), within the municipalities of Alijó, Carrazeda de Ansiães, Mirandela, Macedo de Cavaleiros and Valpaços.

Bounding Box

West Bounding Coordinate

-7.619

East Bounding Coordinate

-7.114

North Bounding Coordinate

41.719

South Bounding Coordinate

41.079

Temporal Coverage

Range of Dates

Begin Date

2011-07-07

End Date

2011-10-27

Taxonomic Coverage

General Taxonomic Coverage

The taxonomic coverage of this dataset spans 1 class, 2 orders, 4 families and 8 species. All individuals were identified to the species level.

Taxonomic Classification

Taxonomic Rank Name

Kingdom

Taxonomic Rank Value

Animalia

Taxonomic Classification

Taxonomic Rank Name

Phylum

Taxonomic Rank Value

Mollusca

Taxonomic Classification

Taxonomic Rank Name

Class

Taxonomic Rank Value

Bivalvia

Common Name

Bivalves

Taxonomic Classification

Taxonomic Rank Name

Order

Taxonomic Rank Value

Unionoida

Taxonomic Classification

Taxonomic Rank Name

Order

Taxonomic Rank Value

Veneroida

Taxonomic Classification

Taxonomic Rank Name

Family

Taxonomic Rank Value

Unionidae

Taxonomic Classification

Taxonomic Rank Name

Family

Taxonomic Rank Value

Margaritiferidae

Taxonomic Classification

Taxonomic Rank Name

Family

Taxonomic Rank Value

Cyrenidae

Taxonomic Classification

Taxonomic Rank Name

Family

Taxonomic Rank Value

Sphaeriidae

License Information

Intellectual Rights

This work is licensed under a

Creative Commons Attribution (CC-BY) 4.0 License

.

 
 

Additional Metadata

Metadata

GBIF Metadata Block

Date Stamp

2021-11-29T09:02:16Z

Citation

Reis J, Rodrigues P, Pires D, Pinheiro P, Madeira J, Múrias T (2018). EDP Foz Tua: Bivalvia – Complementary Studies [2011]. Version 1.2. EDP - Energias de Portugal. Sampling event dataset https://doi.org/10.15468/wb3blm accessed via GBIF.org on 2021-11-29.

Logo URL
http://ipt.gbif.pt/ipt/logo.do?r=edp_sabor_herpetology_baseline
 

Project

• Project

Title

Complementary Studies to the Environmental Impact Assessment of the Foz Tua Hydroelectric Dam – Freshwater bivalves data (EC 48)

Personnel

Individual Name

Given Name

Joaquim

Surname

Reis

Role

AUTHOR

Personnel

Individual Name

Given Name

Patrícia

Surname

Rodrigues

Role

AUTHOR

Personnel

Individual Name

Given Name

Daniel

Surname

Pires

Role

AUTHOR

Personnel

Individual Name

Given Name

Paulo

Surname

Pinheiro

Role

AUTHOR

Abstract

The dataset contains records of freshwater bivalves (Mollusca, Bivalvia) collected in the rivers Tua, Tuela and Rabaçal, which are included in the Complementary Studies to the Environmental Impact Assessment of the Foz Tua Hydroelectric Dam, promoted by EDP – Energias de Portugal, S.A. Data were collected in July and October 2011, during field visits to 30 fixed stations.The main taxa targeted during the field visits were species from the families Unionidae, Margaritiferidae, Sphaeriidae and Cyrenidae. A total of 2072 specimes were identified, of which 1055 Unio delphinus, 329 Corbicula fluminea, 314 Anodonta anatina, 295 Potomida litoralis, 20 Margaritifera margaritifera, 48 Pisidium nitidum, 8 P. casertanum and 3 P. subtruncatum.

Funding

The work was funded by EDP - Energias de Portugal, S.A.

Study Area Description

Descriptor

The study was conducted in part of the sub-basin of river Tua, prior to the construction and subsequent flooding of the lower part of this river’s valley by the Foz-Tua Hydroelectric Dam. It encompassed a total length of 112 km of river, of which 57 in river Tua, 28 in river Rabaçal, and 27 in river Tuela.

Design Description

Description

The objective of the study was to establish in detail the current distribution, extent of occurrence and abundances of the various species of freshwater bivalves in the Tua river sub-basin, in order to fill gaps of knowledge that the EIA had acknowledged but not addressed, as well as to obtain relevant data for the analysis of the impacts of AHFT.

 
 

Methods

• Method

Method Step

Description

To be completed

Sampling

Study Extent

The study was carried out in 31 fixed stations covering the whole length of river Tua (19 stations) and the lower valleys of rivers Tuela (6 stations) and Rabaçal (6 stations). Sampling took place between 5-14 July and 25-27 October 2011.

Sampling Description

Sampling was designed to obtain complementary data: (1) a general characterization of the freshwater bivalve communities (presence/absence and Capture per Unit Effort only), using 19 field stations located every 2 km in the lenthic zone (lower Tua) and every 5 km in the lothic zone (upper Tua and lower Tuela and Rabaçal), totalizing 31 field stations, and (2) a detailed characterization aiming to quantify the abundances at community and population levels, using a restricted number of field stations (5 in river Tua, 2 in river Tuela and 1 in river Rabaçal), roughly 10 km apart.



The method used to perform the general characterization of the communities was random visual search of the river bottom in each field station, using “snorkeling” in clear water of less than 1 m deep. All bivalves found were counted, identified, measured (shell length) and weighted, before being returned to the habitat. A relative count (number/hour/observer) of all bivalves present was made in each field station. The characterization of the riverbed substrate was included, by estimating the relative proportion of rock, pebble, gravel, sand and mud present), as well as a characterization of the riparian vegetation, using a simplified version of the River Habitat Survey (RHS) methodology. To sample small bivalves fully buried in the substrate (sphaeriidae: genus Pisidium, Sphaerium and Musculium; Cyrenidae: genus Corbicula; Unionidae and Margaritiferidae: juveniles only) a modified kick-sampling method was applied using a hand net of 0.5 mm mesh in suitable habitats for these specimens (fine sediments near the margins, roots, underwater vegetation, etc). The captured specimens were sorted and preserved in 96% alcohol for subsequent identification in the lab. The results (presence/absence, total numbers and relative numbers) were used to define homogeneous sectors of rivers regarding the bivalve communities, either by using objective landmarks (e.g., small dams, orographic features, confluence of two water lines), or subjectively, using the station or the medium point between stations.



For detailed characterization, 10 transects of 1 m wide perpendicular to the river (independently of the river’s width) were surveyed in each station by 2-3 technicians by scuba diving. All animals found were identified, counted and processed as above. These data were used to estimate the densities present in each station (expressed as number of bivalves/100 meters of river, by multiplying the number of captures for all transects combined by 10). The number of individual per sector of river (as defined above) was found by multiplying the average value of abundance per 100 m of river from the various stations of a given sector by the coefficient corresponding to the length of that sector (for example, for a sector of 10 km multiplied by the factor 100).

qualityControl

Description

All individuals was identified by experienced researchers with a deep knowledge of the Iberian freshwater mussels