Monitoring of colonial waterfowl species (2013-2014)

Study Extent

This report is covering a monitoring survey of colonial waterfowl species in 148 wetlands of Continental Portugal from 20 February to 31 July during 2013 and 2014.

Sampling

A total of 148 wetlands were considered during the survey, distributed in 9 river basins. The abundance quantification method was carried out in the form of directed censuses, according to the characteristics of each species, except in large colonies where estimate counts were done. In non-accessible areas, the counts were based on aerial photographs, complemented by in-out movements of adult birds in those colonies.

Quality Control

All initial data was inserted in a specific relational database built specifically for the project, which implemented several quality control methods. In the preparation of the dataset for the GBIF publication, data consistency was verified through cluster algorithms using OpenRefine.

Method steps

1. (1) Aggregation of original data from several sources (see above) into a purpose specific relational database built for the project. (2) Preparation of the dataset for GBIF publication used as source the geographic layer in shapefile format. The data layer was a vector layer containing points. The following steps were performed: - Used the WGS84 points to extract the locations from the CAOP2020; - Exported to csv and reinterpreted attributes matching to DwC standard terms.

This dataset is composed by a total of 258 records of 10 waterfowl species, 9 genera, 3 families: 7 species of Ardeidae 2 species of Threskiornithidae 1 species of Phalacrocoracidae

1. Ardea purpurea
   rank: species
2. Phalacrocorax carbo
   rank: species
3. Platalea leucorodia
   rank: species
4. Bubulcus ibis
   rank: species
5. Egretta garzetta
   rank: species
6. Ardea cinerea
   rank: species
7. Nycticorax nycticorax
   rank: species
8. Plegadis falcinellus
   rank: species
9. Botaurus stellaris
   rank: species
10. Ardeola ralloides
    rank: species
11. Ardeidae
    rank: family
12. Threskiornithidae
    rank: family
13. Phalacrocoracidae
    rank: family

A total of 148 wetlands distributed by 9 river basins in Continental Portugal