The dataset contains records of the Great bustard (Otis tarda) collected in the area of the Secondary Irrigation Network of the Alqueva Dam, block C (irrigation blocks of Baleizão-Quintos, Beringel-Beja, Cinco Reis, Ermida, Ervidel, Roxo-Sado and São Pedro-Baleizão) and a control area, performed within the General Bird Monitoring Plan of the area, promoted by EDIA, S.A. Data were collected in the winter, spring and summer of 2021. An ad-hoc number of road transects was performed to detect the target species (in the surrounding fields) using 550 km road net of the study areas (396 km in the impact and 153 km in the “contorol” zone). A total of 145 contacts from the Great Bustard was obtained.
","language":"eng","citation":{"text":"Almeida J, Venade D, Mirinha M, Correia S, Caetano M, Caldeira T, Guégués N, Múrias T (2026). EDIA – Global Bird Monitoring Program of the Alqueva Dam (EFMA) Secondary Irrigation Network, block C - Large steppe species: Great Bustard (Otis tarda) [2021]. Version 1.1. EDIA – Empresa de Desenvolvimento e Infra-estruturas do Alqueva, S.A.. Sampling event dataset https://doi.org/10.15468/zt4xxt accessed via GBIF.org on 2026-10-14.","citationProvidedBySource":false},"contactsCitation":[{"key":7006363,"abbreviatedName":"Almeida J","firstName":"João","lastName":"Almeida","roles":["ORIGINATOR"],"userId":[]},{"key":7006364,"abbreviatedName":"Venade D","firstName":"Diogo","lastName":"Venade","roles":["ORIGINATOR"],"userId":[]},{"key":7006365,"abbreviatedName":"Mirinha M","firstName":"Marco","lastName":"Mirinha","roles":["ORIGINATOR"],"userId":[]},{"key":7006366,"abbreviatedName":"Correia S","firstName":"Sérgio","lastName":"Correia","roles":["ORIGINATOR"],"userId":[]},{"key":7006367,"abbreviatedName":"Caetano M","firstName":"Marco","lastName":"Caetano","roles":["ORIGINATOR"],"userId":[]},{"key":7006368,"abbreviatedName":"Caldeira T","firstName":"Tiago","lastName":"Caldeira","roles":["ORIGINATOR"],"userId":[]},{"key":7006369,"abbreviatedName":"Guégués N","firstName":"Nuno","lastName":"Guégués","roles":["ORIGINATOR"],"userId":[]},{"key":7006370,"abbreviatedName":"Múrias T","firstName":"Tiago","lastName":"Múrias","roles":["METADATA_AUTHOR"],"userId":[]}],"lockedForAutoUpdate":false,"createdBy":"61b5d63a-27f7-4834-8ea6-74012b20ec42","modifiedBy":"crawler.gbif.org","created":"2026-04-08T14:56:43.049+00:00","modified":"2026-05-08T10:00:51.772+00:00","contacts":[{"key":7006363,"type":"ORIGINATOR","primary":true,"userId":[],"firstName":"João","lastName":"Almeida","position":["Project Manager"],"email":["geral@aqualogus.pt"],"phone":[],"homepage":[],"organization":"AQUALOGUS - 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Large steppe species: Great Bustard (Otis tarda) [2021]","identifier":"EDIA Biodiversity Data ","contacts":[{"type":"AUTHOR","primary":false,"userId":[],"firstName":"João","lastName":"Almeida","position":[],"email":[],"phone":[],"homepage":[],"address":[]},{"type":"AUTHOR","primary":false,"userId":[],"firstName":"Diogo","lastName":"Venade","position":[],"email":[],"phone":[],"homepage":[],"address":[]},{"type":"AUTHOR","primary":false,"userId":[],"firstName":"Marco","lastName":"Mirinha","position":[],"email":[],"phone":[],"homepage":[],"address":[]},{"type":"AUTHOR","primary":false,"userId":[],"firstName":"Sérgio","lastName":"Correia","position":[],"email":[],"phone":[],"homepage":[],"address":[]},{"type":"AUTHOR","primary":false,"userId":[],"firstName":"Marco","lastName":"Caetano","position":[],"email":[],"phone":[],"homepage":[],"address":[]},{"type":"AUTHOR","primary":false,"userId":[],"firstName":"Tiago","lastName":"Caldeira","position":[],"email":[],"phone":[],"homepage":[],"address":[]},{"type":"AUTHOR","primary":false,"userId":[],"firstName":"Nuno","lastName":"Guégués","position":[],"email":[],"phone":[],"homepage":[],"address":[]},{"type":"METADATA_AUTHOR","primary":false,"userId":[],"firstName":"Tiago","lastName":"Múrias","position":[],"email":[],"phone":[],"homepage":[],"address":[]}],"funding":"The work was funded by EDIA, S.A.","awards":[],"studyAreaDescription":"The data were collected in the area covered by the Secondary Irrigatrion Network of the Alqueva Dam project, block C (irrigation blocks of Baleizão-Quintos, Beringel-Beja, Cinco Reis], Ermida, Ervidel, Roxo-Sado and São Pedro-Baleizão) in the municipalities of Beja and Aljustrel, and in a control area, in the municipality of Castro Verde (all in the district of Beja).","designDescription":"The objective of the study was to determine the general patterns of occurrence of the target species, their abundance and breeding status in the study area, based on had-oc road transects. The method use was deemed suitable to assess the sampling of all species occurrying in the area of the study area and of an associated control area.","relatedProjects":[],"abstract":"The dataset contains records of Great Bustard collected in the area in the area of the Secundary Irrigation Network of the Alqueva Dam, block C (irrigation blocks of Baleizão-Quintos, Beringel-Beja, Cinco Reis], Ermida, Ervidel, Roxo-Sado and São Pedro-Baleizão) and a control area, promoted by EDIA, S.A. Data were collected in the winter (January-February), spring (April) and summer (July-August) of 2021. An ad-hoc number of road transects was performed to detect the target species (and, for Great Bustard, possible “leks” during the breeding season) in the surrounding fields, using the 550 km road net of the study area (396 km in the “impact” and 153 km in the “control” zone). The occurrence of the target taxa was documented through 145 records of individuals of the target species."},"samplingDescription":{"studyExtent":"The data were collected in the area covered by the Secondary Irrigatrion Network of the Alqueva Dam project, block C (irrigation blocks of Baleizão-Quintos, Beringel-Beja, Cinco Reis, Ermida, Ervidel, Roxo-Sado and São Pedro-Baleizão) in the municipalities of Beja and Aljustrel, and in a control area, in the munuicipality of Castro Verde (all in the district of Beja).","sampling":"Car transects were carried out along the entire network of available trails (approximately 550 km) to cover the entire area, in “impact” and “control” (“TCxx”) zones. They were driven at low speeds (less than 20 km/h) during the cooler periods of the day (early morning and late afternoon). frequent stopping points were made in places with good visibility to locate the birds. All detections of the species were noted in a field form specifically made for this purpose. These forms included (a) the location (with geographic coordinates), time, number of individuals, sex, age (classifying each animal as Immature, Juvenile, Sub-adult or Adult), number of offspring per female, behaviour and habitat of occurrence. Additionaly, the following metadata were included: (a) day of the visit, start and end time of the transect, observer identification, weather conditions in qualitative scales (cloud cover, temperature wind and rainfall. \n\nThe geographic coordinates of the starting point of each transect is given in columns “decimalLatitude”/decimalLongitude” , and the start/end points of the transect in the column “footprintWKT” of the DarwinCore files. \n\nRegarding the habitat of occurrence, a pre-established list of habitat classes was used, which based on the COS 2007 (Land Use and Occupation Chart for Mainland Portugal for 2007), produced by the Portuguese Geographical Institute.","qualityControl":"All identifications were performed by qualified technicians","methodSteps":["To be completed"]},"countryCoverage":[],"collections":[],"dataDescriptions":[],"dataLanguage":"eng","purpose":"This dataset is part of a broader initiative whereby the company EDIA, S.A. will make available all biodiversity data collected during impact assessment and biological monitoring studies.
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