EDP Foz-Tua: Dragonflies and Damselflies (Odonata) - Ecological Monitoring Program (2011-2017)

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 332 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:

Costa H, Salgueiro N, Marques A T, Coelho H, Monteiro B, Brás L, Gonçalves R, Oliveira J, Silva M, Sousa D, Caetano M, Romão F, Santos J, Peixoto M, Múrias, T (2019): EDP Foz-Tua: Dragonflies and Damselflies (Odonata) - Ecological Monitoring Program (2011-2017). v1. EDP - Energias de Portugal. Dataset/Samplingevent. http://ipt.gbif.pt/ipt/resource?r=edp_tua_odonata_pme&v=1.0

Rights

Researchers should respect the following rights statement:

The publisher and rights holder of this work is EDP. 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: 875efb2d-7527-4f91-8583-04e3d2e47176.  EDP publishes this resource, and is itself registered in GBIF as a data publisher endorsed by GBIF Portugal.

Keywords

Dragonflies; Damselflies; Odonata; terrestrial; occurrence; observations; captures; point counts

Contacts

Geographic Coverage

The data were collected within a 5-km buffer around the valley of the River Tua (Northeast Portugal), in Trás-os-Montes e Alto Douro region, up to 50 km from the mouth, in the municipalities of Carrazeda de Ansiães, Alijó, Murça, Vila Flor and Mirandela.

Taxonomic Coverage

The taxonomic coverage of this dataset spans 1 phylum, 1 class, 1 order, 10 families, 23 genera and 40 species.

Temporal Coverage

Project Data

The dataset contains records of Dragonflies and Damselflies (Odonata) along the lower Tua River valley, and included in the Ecological Monitoring Program of the Foz Tua Hydroelectric Dam, promoted by EDP – Energias de Portugal, S.A. Data were collected between June 2011 and August 2017, during field visits to 33 sampling points with favourable habitats for Odonata within a 5-km buffer around the River Tua lower valley and a small stream in the Douro basin. The occurrence of the target taxa was documented through 802 positive observation events, of which 40 where identified to the taxonomic level of order, 31 to family, 94 to genus and 637 to species. The most recorded species (≥40 individuals) were Plactynemis latipes (67 observations), Orthetrum coerulescens (54), Calopteryx haemorrhoidalis (45), Onychogomphus forcipatus (43) and Anax imperator (40).

The personnel involved in the project:

Sampling Methods

Sampling was designed to cover the main habitat types for Dragonflies and Damselflies in and around the lower River Tua valley affected by the Foz Tua dam and in the Ferradosa stream (Douro basin). Each sampling point was visited twice per year in spring (April-June) and summer (July-August). The sampling aimed to detect both adults and larvae/exuvia of the target species. Adults were monitored during their flight period, between 9:30 and 16:30, on days with appropriate weather conditions (temperature above 13ºC, light wind, little cloudiness, no rain or fog), with a hand-held net. Sampling took place for 15 minutes, during which the sighted individuals were recorded within a 5m range, and the sorrounding vegetation was carefully prospected. Reproductive behavior (individuals in tandem and ovoposition) and territorial behaviors were duly recorded. Specimens were identified in the field using appropriate guides Observations made in a non-systematic manner, particularly during the study area, were also recorded. All individuals were releasad after identification. Larval samples were collected using a hand-held net with a circular section of approximately 30 cm in diameter and 1 square-mm mesh. Also, 15-minute sweeps of the margins in each river/stream were performed in the opposite direction of the current, in order to sample different habitats (rock zones, vegetation). Two replicates were taken at each point, in places with the same characteristics, but not coincident. The samples were screened in the field and the relevant material fixed in situ with 80% alcohol for later identification in the laboratory. The collection of the exuvia was done by prospection of the vegetation around the water line for 15 minutes, in order to verify the presence of this type of structures. These were collected and stored in vials, duly labeled, for later identification in the laboratory, using specialized bibliography.

Method step description:

1. To be completed

Bibliographic Citations

1. Dijkstra, K. 2006. Field Guide to the Dragonflies of Britain and Europe. British Wildlife Publication, Dorset. 320 pp. ISBN: 9780953139941
2. Maravalhas, E, Soares, A 2013. A. As Libélulas de Portugal. Booky Publisher. ISBN: 9899861405
3. Askew, R. R. 1988. The Dragonflies of Europe. Harley Books, Essex. ISBN: 0946589100

Additional Metadata