EDP Foz-Tua: Cabrera vole (Microtus cabrerae) - Ecological Monitoring Program, Exploration Phase [2017-2020]

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¿Cómo referenciar?

Los usuarios deben citar este trabajo de la siguiente manera:

Cabral J A, Travassos P, Vale-Gonçalves H, Barros P, Duro V, Brás L, Carvalho D, Paupério J, Quirós J, Múrias T (2023): EDP Foz-Tua: Cabrera vole (Microtus cabrerae) - Ecological Monitoring Program, Exploration Phase [2017-2020]. v1.0. EDP - Energias de Portugal. Dataset/Samplingevent. http://ipt.gbif.pt/ipt/resource?r=edp_tua_cabrera_2018-20&v=1.0

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El publicador y propietario de los derechos de este trabajo es EDP. Esta obra está bajo una licencia Creative Commons de Atribución/Reconocimiento (CC-BY 4.0).

Registro GBIF

Este recurso ha sido registrado en GBIF con el siguiente UUID: fb9d1b2f-2716-4afd-82d6-459722a4a457.  EDP publica este recurso y está registrado en GBIF como un publicador de datos avalado por GBIF Portugal.

Palabras clave

Cabrera vole; Microtus cabrerae; small mammals; occurrence; indirect evidence; Rodentia; exploration phase

Contactos

Cobertura geográfica

The data were collected within a 2-km buffer around the valley of the River Tua (Northeast Portugal), up to 50 km from the mouth, in the municipalities of Carrazeda de Ansiães, Murça, Vila Flor and Mirandela.

Cobertura taxonómica

The taxonomic coverage of this dataset spans 1 phylum, 2 classes, 3 orders, 5 families 6 genera and 7 species.

Cobertura temporal

Datos del proyecto

The dataset contains records of the Cabrera vole (Microtus cabrerae) and similar species of the class Rodentia and Soricomoprha collected in plots along the lower Tua River, included in the Ecological Monitoring Program (2017-2020) of the Foz Tua Hydroelectric Dam, promoted by EDP – Energias de Portugal, S.A. Data were collected between November 2017 and December 2020 during field visits to 50 known or presumed colonies of the species within a 3-km buffer around the River Tua lower valley. The occurrence of the target taxa was documented through 245 observation events distributed among the 32 known or potential occupied colonies. In total, four taxa were identified, at genus (19) or species levels. Microtus cabrerae was the most abundant species (121 indirect observations/signs of presence), followed by Apodemus sylvaticus (19), M. lusitanicus (15), Crocidura russula (14) and Mus spretus (13). Two bird species identified by scats (Curruca undata and Turdus merula) were also included. Non-identifiable/contaminated scats (42) were assessed to the phylum, only.

Personas asociadas al proyecto:

Métodos de muestreo

Sampling was designed to cover all sites with potential habitats for the Cabrera vole (fallows, bushes, river habitats with herbaceous vegetation) located in a buffer of 3 km around the lower Tua valley affected by the Foz Tua dam. All areas surveyed during the previous phases of the project (EIA and Baseline Studies) that were not flooded (50) were included. These areas, were prospected for indirect signs of the Cabrera vole presence (number of tracks, faeces or latrines, and heaps of grass clippings) in November of 2017 and in spring/summer (April-May) and autumn (November-December) of 2018-2020. In each known or potential area surveyed, a detailed description of all the relevant biotopes was performed. This description included (a) the type of biotope, (b) the height of vegetation, (c) the characteristics of the landscape surrounding the demarked areas, namely in relation to the land-use and disturbance. Any changes in these parameters observed between sampling periods were recorded. This description, linked with the type of evidences found, was used to classify each area in one of five possible cases: (a) confirmed colony (active and occupied colony of M. cabrerae), (b) confirmed but unoccupied colony (absence of recent evidence in a colony previously identified by molecular tools), (c) potential colony (with evidences of possible, but not (genetically) confirmed, presence of the target species, like tracks and heaps of grass clippings), (d) potential habitat (patches with suitable habitat but without recorded evidences), and (e) no habitat (habitat patches currently without suitable conditions to the occurrence of the species – eg., agriculture or plowed terrain, flat areas without herbaceous cover, riverbeds, with no confirmed occurrences of the species). All faecal samples found in each visit to a colony were collected for subsequent genetic analysis (mitochondrial gene cytocrome-b) in a dedicated laboratory in CIBIO-InBIO (non-invasive samplings), using specific protocols to extract, sequence and analyze the resulting DNA information. This dataset only provides information about the faeces collected (and subjected to molecular analysis) along the study period, thus excluding the “subjective” evidences (tracks, heaps…). Thus, in all, only 34 of the 50 surveyed sites were really useful to assess the occurrence of the species.

Descripción de la metodología paso a paso:

1. To be completed

Metadatos adicionales