{"key":"abf331a0-b1d4-4a02-9943-c2e601074842","installationKey":"06d75b22-fc7a-42ff-a14f-65a25cd0f3ab","publishingOrganizationKey":"61b5d63a-27f7-4834-8ea6-74012b20ec42","doi":"10.15468/363uys","version":"1.1","external":false,"numConstituents":0,"type":"SAMPLING_EVENT","shortName":"EDIA - Alqueva Birds: Bird Atlas winter 2017-2018","title":"EDIA – Global Bird Monitoring Program of the Alqueva Dam (EFMA) Secondary Irrigation Network (Block A) and Cuba IBA: Bird Atlas [winter 2017-2018]","description":"\n            The dataset contains records of all birds collected in an area of the Secondary Irrigation Network of the Alqueva Dam (Block A: Alvito-Pisão) and in the Important Bird Area (IBA) of Cuba, in the framework of a “Bird Atlas” performed within the General Bird Monitoring Plan of the area, promoted by EDIA, S.A. Data were collected in the winter of 2017-2018, in 178 sampling squares of 1x1 km (UTM grid), distributed in the area affected by the Irrigation Block (152 “impact” squares) and in a control area (26 “control” squares), stratified by habitat. A total of 12864 contacts was obtained, for 83 species of birds.\n        ","language":"eng","citation":{"text":"Almeida J, Venade D, Mirinha M, Safara J, Guégués N, Múrias T (2025). EDIA – Global Bird Monitoring Program of the Alqueva Dam (EFMA) Secondary Irrigation Network (Block A) and Cuba IBA: Bird Atlas [winter 2017-2018]. Version 1.1. EDIA – Empresa de Desenvolvimento e Infra-estruturas do Alqueva, S.A.. 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J., Burgess, N. D. e Hill, D. A. 2000. Bird Census Techniques, second Edition. Ed. Academic Press.","identifier":"ISBN-0-12-095830-9","citationProvidedBySource":false},{"text":"Rabaça, J. E. 1995. Métodos de Censos de Aves: Aspectos Gerais, Pressupostos e Princípios de Aplicação. SPEA. Lisboa.","identifier":"ISBN: 9789729678608","citationProvidedBySource":false},{"text":"Robbins, C. S. 1981. Effect of the time of the day on bird activity. 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data were collected in the area the area of the Secondary Irrigation Network of the Alqueva Dam (Block A: Alvito-Pisão) and in the Important Bird Area (IBA) of Cuba” and in an adjacent control area, covering in total 21872 ha, in the municipalities of Vidigueira, Cuba, Beja and Alvito (district of Beja, “impact zone”) and Évora and Arraiolos (district of Évora, “control zone”).","boundingBox":{"minLatitude":38.06049,"maxLatitude":38.69575,"minLongitude":-7.95865,"maxLongitude":-7.74568,"globalCoverage":false}}],"temporalCoverages":[{"@type":"range","start":"2018-01-14T00:00:00.000+00:00","end":"2018-03-04T00:00:00.000+00:00"}],"keywordCollections":[{"thesaurus":"GBIF Dataset Type Vocabulary: http://rs.gbif.org/vocabulary/gbif/dataset_type_2015-07-10.xml","keywords":["bird atlas; Aqueva dam; irrigation block A; Alvito-Pisão; IBA; monitoring plan; impact; winter 2017--2018"]}],"project":{"title":"EDIA – Global Bird Monitoring Program of the Alqueva Dam (EFMA) Secondary Irrigation Network (Block A) and Cuba IBA: Bird Atlas [winter 2017-2018]","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":"Jorge","lastName":"Safara","position":[],"email":[],"phone":[],"homepage":[],"address":[]},{"type":"ADMINISTRATIVE_POINT_OF_CONTACT","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 study was conducted in part the Secondary Irrigation Network of the Alqueva Dam (Block A: Alvito-Pisão) and the IBA “Cuba”, as well as in a control area outside these limits, covering a total area of 21872 ha.","designDescription":"The objective of the study was to determine the general patterns of occurrence of the local species and their abundance during the winter period in the study area, based on a regular grid of 1x1 km UTM squares. The method use was deemed suitable to assess the sampling of all species occurrying in the area of the study block, and of an associated control area. For the purpose of estimating the number of grids to be sampled, the overlap of the UTM grid with the study area was considered, determined as the area defined by the outer limits of the irrigation block and the Cuba IBA, plus a buffer of 500 m, as well as by the control area. In addition, all UTM grids with less than 50% of the area within the study area were removed from the study area.","relatedProjects":[],"abstract":"The dataset contains records of all birds collected in an area of the Secondary Irrigation Network of the Alqueva Dam (Block A: Alvito-Pisão) and in the Important Bird Area (IBA) of Cuba, in the framework of a “Bird Atlas” performed within the General Bird Monitoring Plan of the area, promoted by EDIA, S.A. Data were collected in the winter of 2017-2018, in 178 sampling squares of 1x1 km (UTM grid), distributed in the area affected by the Irrigation Block (152 “impact” squares) and in a control area (26 “control” squares), stratified by habitat. The occurrence of the target taxa was documented through 13037 records of individuals. The most abundant species (>900 records) were Sturnus unicolor (1285),  Vanellus vanellus (1100) and Passer domesticus (904)."},"samplingDescription":{"studyExtent":"The data were collected in the area of the Secondary Irrigation Network of the Alqueva Dam (Block A: Alvito-Pisão) and in an adjacent control area, covering in total 21872 ha, in the municipalities of Vidigueira, Cuba, Beja and Alvito (district of Beja, “impact zone”) and Évora and Arraiolos (district of Évora, “control zone”).","sampling":"The survey consisted of a systematic visit to each square, walking around it at low speed for a period of 20 min. In order to maximize the probability of detecting birds, the visits were carried out under favorable weather conditions, namely the absence of wind and rain (Rabaça, 1995; Bibby et al., 2000). Each square was visited twice during the wintering season.\n\nFieldwork took place between sunrise and sunset, excluding the hottest hours of the day due to the reduced activity of most bird species (e.g., Robbins, 1981). During each visit to a given grid, all contacts and observations made were recorded on a field sheet, along with a number of other biological and environmental parameters (age, sex, flight behavior, habitat). \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.","pubDate":"2025-10-24T00:00:00.000+00:00","maintenanceUpdateFrequency":"AS_NEEDED","maintenanceDescription":"This resource will be regularly checked for accuracy.","license":"http://creativecommons.org/licenses/by/4.0/legalcode","dwca":{"coreType":"http://rs.tdwg.org/dwc/terms/Event","extensions":["http://rs.tdwg.org/dwc/terms/Occurrence"],"modified":"2026-07-11T22:13:24.179+00:00"},"approximateCounts":{"occurrenceCount":4018}}