Movhera Foz Tua: Bat Roosts - Ecological Monitoring Program (PME) and Program of Mitigation/ Compensatory Measures (PMC): Exploration Phase (2021-2023)

Data Records

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 510 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.

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:

Cabral J A, Barros P, Carvalho D, Brás L, Vale-Gonçalves H, Bessa I, Ferreira A, Múrias T (2024). Movhera Foz Tua: Bat Roosts - Ecological Monitoring Program (PME) and Program of Mitigation/ Compensatory Measures (PMC): Exploration Phase (2021-2023). Version 1.0. Movhera - Hidroelétricas do Norte, S.A.. Samplingevent dataset. http://ipt.gbif.pt/ipt/resource?r=movhera_ahft_chiroptera_roost_2021-23&v=1.0

Rights

Researchers should respect the following rights statement:

The publisher and rights holder of this work is Movhera - Hidroelétricas do Norte, S.A.. 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: c548171c-296a-47aa-b063-3f4aafd6ca32.  Movhera - Hidroelétricas do Norte, S.A. publishes this resource, and is itself registered in GBIF as a data publisher endorsed by GBIF Portugal.

Keywords

Bats; occurrence; observation; hibernation; reproduction; refuges; roosts; ecological monitoring program; compensatory measures program; 2022-2023

Contacts

Geographic Coverage

Most data were collected within a 5-km radius buffer around the river Tua valley (Northeast Portugal), up to 36 km from the mouth. There were also several sites located up to 15 km and two at >20 km from the river. The sites were located in the municipalities of Alijó, Carrazeda de Ansiães, Vila Flor, Mirandela, Sabrosa and Bragança.

Taxonomic Coverage

The taxonomic coverage of this dataset spans 1 class, 1 order, 4 families, 8 genera and 14 species positively identified.

Temporal Coverage

Project Data

The dataset contains records of bats (Chiroptera) collected in roosts along the lower valley of River Tua. Data was collected in the scope of the Ecological Monitoring Program (PME) and Program of Mitigation/Compensation Measures (PM C) of the Foz Tua Hydroelectric Dam, promoted by EDP – Energias de Portugal, S.A., subsequently (2021) transferred to Movhera – Hidroelétricas do Norte, S.A. Data were collected between January 2022 and October 2023 during field visits to 153 known or presumed bat hibernation, reproduction and pre-dispersion (post-reproduction) roosts, most of them between 0-15 km radius buffer around the lower valley of River Tua. The occurrence of the target taxa was documented through 510 observation events. In total, 17 taxa were identified, 15 to the species rank and two to the genus rank. The most common individual species (>100 records) were Rhinolophus ferrumequinum (954 records), Miniopterus schreibersii (510), and R. hipposideros (128). Due to the vulnerability of the roost locations, the precision of the geographic coordinates was degraded to 0.01

The personnel involved in the project:

Sampling Methods

Sampling was designed to cover all known and potential bat roosts in the study area, including railroad tunnels, caves, mines, wells, bridges and all sorts of buildings. A place was considered to be a roost when the presence of bats was confirmed, either by direct observations or by indirect evidences (e.g., faeces, urine stains, etc.). Each roost was visited once or twice per season, in the hibernation (January-February), reproduction (April-August) and pre-dispersion (September-October) periods, depending on the year. In 2021, due to the Covid-19 pandemics movement restrictions, there was no monitoring campaigns. All roosts were searched for the presence of bats by two observers, which recorded all individuals seen. The time spent in each roost varied with the number of bats present and the accessibility conditions. The potential roosts in the rocky crevices were sampled with the conventional ultra-sound devices. The methodoogy used was the same applied for the habitat sampling program (PME and MC12H). Species identification were usually made “in loco”, with the aid of head-torches, binoculars and field guides. Some bats were photographed to allow a “a posteriori” identification of individuals that raised doubts, or to count large groups that could not be accurately counted in a suitable time in the field.

Method step description:

1. To be completed

Bibliographic Citations

1. Chapman AD & Grafton O (2008) Guide to Best Practices for Generalising Sensitive Species-Occurrence Data. Copenhagen: GBIF Secretariat. https://doi.org/10.15468/doc-b02j-gt10 https://doi.org/10.15468/doc-b02j-gt10

Additional Metadata