EDP Foz Tua: Bat Habitats - Complementary Studies [2010]

The dataset contains records of bats (Chiroptera) collected in the lower valley of River Tua. Data were collected in the scope of the Complementary Studies (2010-2011) of the Environmental Impact Assessment of the Foz Tua Hydroelectric Dam, promoted by EDP – Energias de Portugal, S.A. Data were collected in April 2010 during field visits to 48 points located in suitable foraging habitats for bats, within a 5-km radius buffer around the lower valley of River Tua. The presence and identity of the bat species was assessed by acoustic sampling of the echo-location calls emitted in fligth. The records include taxa identified at the species or genus level, as well as groups of species corresponding to seven acoustic “species complexes”.

Default

Identification

Alternate Identifier
10.15468/e2yggd
Alternate Identifier
54df7284-37aa-4584-8484-433100d62c6c
Alternate Identifier
http://ipt.gbif.pt/ipt/resource?r=edp_tua_bathabitats_cs_2010
Publication Date
2019-03-25
Title
EDP Foz Tua: Bat Habitats - Complementary Studies [2010]
Abstract
The dataset contains records of bats (Chiroptera) collected in the lower valley of River Tua. Data were collected in the scope of the Complementary Studies (2010-2011) of the Environmental Impact Assessment of the Foz Tua Hydroelectric Dam, promoted by EDP – Energias de Portugal, S.A. Data were collected in April 2010 during field visits to 48 points located in suitable foraging habitats for bats, within a 5-km radius buffer around the lower valley of River Tua. The presence and identity of the bat species was assessed by acoustic sampling of the echo-location calls emitted in fligth. The records include taxa identified at the species or genus level, as well as groups of species corresponding to seven acoustic “species complexes”.
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
  Profico Ambiente e Ordenamento Lda - Susana Batista (General Coordinator )
Rua Alfredo da Silva, 11B , Lisbon , 1300-040 Lisboa , PORTUGAL
Dataset Creator
  Profico Ambiente e Ordenamento Lda - Sérgio Bruno Ribeiro (Fieldwork Coordinator )
Rua Alfredo da Silva, 11B , Lisbon , 1300-040 Lisboa ,
Dataset Creator
  Profico Ambiente e Ordenamento Lda - Pedro Geraldes (Technician )
Rua Alfredo da Silva, 11B , Lisbon , 1300-040 Lisboa , PORTUGAL
Dataset Creator
  Profico Ambiente e Ordenamento Lda - Pedro Araújo (Technician )
Rua Alfredo da Silva, 11B , Lisbon , 1300-040 Lisboa , PORTUGAL
Dataset Creator
  CIBIO-InBIO, Centro de Investigação em Biodiversidade e Recursos Genéticos, Universidade do Porto - Tiago Múrias (Researcher )
Campus Agrário de Vairão , Vairão , 4485-661 Vairão , PORTUGAL
Metadata Provider
  CIBIO-InBIO, Centro de Investigação em Biodiversidade e Recursos Genéticos, Universidade do Porto - Tiago Múrias (Researcher )
Campus Agrário de Vairão , Vairão , 4485-661 Vairão , PORTUGAL
Associated Party
USER
  CIBIO-InBIO, Centro de Investigação em Biodiversidade e Recursos Genéticos, Universidade do Porto - Tiago Múrias (Researcher )
Campus Agrário de Vairão , Vairão , 4485-661 Vairão , PORTUGAL
Dataset Contact
  EDP - Energias de Portugal - João Madeira (Manager )
Av. 24 de 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
Keywords (NA )
  • Bats; acoustic sampling; reproduction; foraging habitats

Geographic Coverage

Geographic Description
The data were collected within a 5-km radius buffer around the lower valley of River Tua (Northeast Portugal), up to 45 km from the mouth, in the municipalities of Alijó, Carrazeda de Ansiães, Alijó, Mirandela and Murça.

Bounding Box

West Bounding Coordinate
-7.564
East Bounding Coordinate
-7.141
North Bounding Coordinate
41.564
South Bounding Coordinate
41.181

Temporal Coverage

Range of Dates

Begin Date

2010-04-01

End Date

2010-04-30

Taxonomic Coverage

General Taxonomic Coverage
The taxonomic coverage of this dataset spans 1 phylum, 1 class, 1 order, 4 families, 9 genus and 11 species positively identified. Additionally, a set of 9 potential species may be present in the 7 “species complexes” identified.

Taxonomic Classification

Taxonomic Rank Name
Phylum
Taxonomic Rank Value
Chordata

Taxonomic Classification

Taxonomic Rank Name
Class
Taxonomic Rank Value
Mammalia

Taxonomic Classification

Taxonomic Rank Name
Order
Taxonomic Rank Value
Chiroptera

Taxonomic Classification

Taxonomic Rank Name
Family
Taxonomic Rank Value
Vespertilionidae

Taxonomic Classification

Taxonomic Rank Name
Family
Taxonomic Rank Value
Miniopteridae

Taxonomic Classification

Taxonomic Rank Name
Family
Taxonomic Rank Value
Rhinolophidae

Taxonomic Classification

Taxonomic Rank Name
Family
Taxonomic Rank Value
Molossidae

License Information

Intellectual Rights

This work is licensed under a

Creative Commons Attribution (CC-BY) 4.0 License

.

 
 
 

Projects

Projects

• ProjectEDP Biodiversity Data

Title
EDP Foz Tua: Bat Habitats - Complementary Studies [2010]

Personnel

Individual Name

Given Name
Susana
Surname
Batista
Role
AUTHOR

Personnel

Individual Name

Given Name
Sérgio Bruno
Surname
Ribeiro
Role
AUTHOR

Personnel

Individual Name

Given Name
Pedro
Surname
Geraldes
Role
AUTHOR

Personnel

Individual Name

Given Name
Pedro
Surname
Araújo
Role
AUTHOR

Personnel

Individual Name

Given Name
Tiago
Surname
Múrias
Role
ADMINISTRATIVE_POINT_OF_CONTACT
Abstract
The dataset contains records of bats (Chiroptera) collected in suitable foraging habitats along the lower valley of River Tua. Data were collected in the scope of the Complementary Studies (2010-2011) to the Environmental Impact Assessment of the Foz Tua Hydroelectric Dam, promoted by EDP – Energias de Portugal, S.A. Data were collected in April 2010, during field visits to 48 sampling points, stratified by habitat, within a 5-km radius around the lower valley of River Tua. The occurrence of the target taxa was documented through 427 observation events. In total, 12 taxa were identified, 11 to the species rank and 1 to the genus rank. The 7 “species complexes” identified could potentially add 9 more species to the list. The most common species (>20 records) were Pipistrellus pygmaeus (151 records), Tatarida teniotis (60 records), Pipistrellus kuhlii (34 records), Myotis daubentonii (27 records) and Eptesicus serotinus (24 records). The “species complex” Pipistrellus pipistrellus/P. pygamaeus was also relevant, with 61 records.
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. The sampling area covered a radius of 5 km centered in the river margins, up to a length of about 45 km from the Tua mouth.

Design Description

Description
The objective of the study was do document the usage of the potential foraging habitats for bats in the river Tua lower valley before the dam construction (river margins, woodlands, shrublands, vineyards, orchards/olive-orchards and urbanized areas), to gather quality data to support the design and implementation of mitigation and/or compensation measures.
 
 

Methods

Methods

• Method

Method Step

Description

Sampling

Study Extent

The data were collected within a 5-km radius buffer around the lower valley of River Tua (Northeast Portugal), up to 45 km from the mouth, in the municipalities of Alijó, Carrazeda de Ansiães, Mirandela and Murça.

Sampling Description

Sampling was designed to cover all suitable foraging habitats for bats in the study area. A stratified sampling procedure was used, with the number of samples allocated to each habitat in proportion to the area occupied and/or its significance for bats. A total of 48 sampling points were set in natural woodlands (7), river margins (15), shrublands (7), orchards/olive groves (5), vineyards (8) and urbanized areas (6). Each point was visited once between 8 and 22 April 2010, within ± 3 hours of sunset, and acoustic sampling was carried out for 20 (consecutive) minutes.

The detection of the specimens in flight was made with a bat detector (Pettersson Elektronik, D240X model), with a frequency range of 10-120 kHz. The detector was connected to an automatic digital recorder (model Nomad Jukebox 3, from Creative Technology Ltd.) which saved the recordings in a “Wave” format, at a frequence of 44.1 kHz and at an expanded mode of 10x, making them audible to the human ears while, at the same time, preserving the original acoustic characteristics.

The analysis of the sound records was made in the lab, with the software “Batsound Pro – Sound Analysis”, from Pettersson Elektronik. This software generates graphics (oscillograms, sonograms and power spectrums) that allow the identification of the detected species by comparing them with those available in reference bat sound libraries. The acoustic variables used to identify the sounds are (1) the structure of the pulse, (2) the frequency of maximum energy (kHz), (3) the range of frequencies (kHz), (4) the pulse duration (ms), (5) the interval between pulses (ms), and (6) the pulse repetition rate (Hz).

The exact identification of the bat species by sound analysis is not always possible, due to problems in detectability and/or identifiability. In the context of this work, all records that could not be unequivocally attributed to a given species were assigned to the “species complex” that best fitted their frequency characteristics. Thus, 3 multi-specific groups sharing the same acoustic characteristics were considered: Myotis spp. (in turn subdivided in “large” Myotis – M. myotis and M. blythii – and “small” Myotis – the remaining 7 species), Pipistrellus ssp. (several complexes of different combinations of species, including Miniopterus schreibersii, whose vocalization is undistinguishable from that of Pipistrellus pygmaeus), and Nyctalus spp. (N. lasipoterus and N. noctula).

qualityControl

Description
All individual identifications were performed by qualified technicians
 
 

Not available