Dolichopodidae of Portugal - dataset 2009-2018
A first comprehensive account on the dolichopodid fauna (Diptera: Dolichopodidae) of Portugal is presented here as the result of multiple surveys by primarily Portuguese researchers between 2009 and 2016. All mainland Portuguese provinces and all districts but one (Évora) were investigated. A total of 761 dolichopodid samples were collected in 278 sampling sites distributed over 87 municipalities and 182 localities, with nearly ¾ of the samples gathered by sweepnet. In terms of generic representation, the Portuguese dolichopodid fauna occupies an intermediate position between those of northwestern European and other Mediterranean countries. Despite the large amount of data gathered, the dolichopodid fauna of Portugal remains insufficiently known and a considerable number of additional known and new species can be expected with continued sampling. A more exhaustive description of the dataset and the results of the surveys can be found in Pollet et al. (2019).
We have released this dataset to the public domain under a CC-BY licence. We would appreciate it if you follow the GBIF citation guidelines (https://www.gbif.org/citation-guidelines). If you have any questions regarding this dataset, don't hesitate to contact us via the contact information provided in the metadata.
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 682 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.
Download the latest version of this resource data as a Darwin Core Archive (DwC-A) or the resource metadata as EML or RTF:
The table below shows only published versions of the resource that are publicly accessible.
How to cite
Researchers should cite this work as follows:
Pollet M, Andrade R, Gonçalves A, Andrade P, Jacinto V, Almeida J, De Braekeleer A, Van Calster H, Brosens D (2018): Dolichopodidae of Portugal - dataset 2009-2018. v1.4. Research Institute for Nature and Forest (INBO). Dataset/Samplingevent. https://ipt.inbo.be/resource?r=dolichopodidae-occurrences&v=1.4
Researchers should respect the following rights statement:
The publisher and rights holder of this work is Research Institute for Nature and Forest (INBO). This work is licensed under a Creative Commons Attribution (CC-BY) 4.0 License.
Biodiversity; distribution; ecology; first records; Mediterranean; new species; rarity; Samplingevent
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All mainland Portuguese provinces and all districts but one (Évora) were investigated.
|Bounding Coordinates||South West [36.985, -10.02], North East [42.229, -5.735]|
The collection contains 6,680 specimens of 200 different species, with 142 recognized (known), 40 new (undescribed) and 18 doubtful species of Dolichopodidae. The published dataset holds 2,137 occurrences of 145 different species (144 species and Pelastoneurus sp.) with 5,805 specimens.
|Suborder||Brachycera (true flies)|
|Family||Dolichopodidae (long-legged flies)|
|Genus||Acropsilus, Anahydrophorus, Anepsiomyia, Aphrosylus, Argyra, Campsicnemus, Ceratopos, Chrysotimus, Chrysotus, Diaphorus, Dolichopus, Gymnopternus, Hercostomus, Hydrophorus, Liancalus, Machaerium, Medetera, Muscidideicus, Neurigona, Orthoceratium, Ortochile, Parathalassius, Pelastoneurus, Peloropeodes, Poecilobothrus, Rhaphium, Schoenophilus, Sciapus, Sybistroma, Sympycnus, Syntormon, Systenus, Tachytrechus, Telmaturgus, Teuchophorus, Thinophilus, Thrypticus, Xanthochlorus|
|Start Date / End Date||2009-04-19 / 2016-10-30|
|Start Date / End Date||2018-05-02 / 2018-05-03|
The following sampling strategy was applied by Rui Andrade and Ana Gonçalves (together they gathered about 88% of the samples): the focus of collecting during fieldwork was on various dipteran families with Dolichopodidae as one of the target taxa. Both researchers aimed at collecting all over Portugal to fill gaps in the known distribution of species. For practical reasons, a large number of sites were visited near Porto, and some of them were investigated on multiple occasions and/or during longer periods of time. For more distant collecting trips, mostly protected areas were selected on the assumption that good habitat types for Diptera were present. Rui Andrade steadily sampled Diptera in humid sites; e.g., along banks of streams and rivers, but also visited drier places in order to get a reliable idea of the extant Diptera richness. Collecting was carried out throughout the year with samples taken during every month. Most samples were collected in June, May and September (in decreasing numbers), whereas the first two and last two months of the year each produced 10 or fewer samples. About 72% of the samples and more than 86% (including those collected by Marc Pollet and Anja De Braekeleer) of the specimens were collected by sweep net which was used to gather flies from all kinds of surfaces; e.g., rocks, muddy and sandy soil, but also from tree trunks. Yellow pan traps and hand collecting accounted for 12% and 11% of the samples respectively, and produced about 6% and 7% of the specimens respectively. The other collecting methods (light trap, Malaise trap, observation, pan trap of unknown colour, pooter, rearing) together contributed about 2% (= 17) of the samples and only 0.7% (n = 47) of the specimens.
|Study Extent||Samples were retrieved from all 11 Portuguese provinces, and all districts except for Évora. In terms of number of municipalities, localities and locations, the districts of Bragança, Guarda and Faro were best covered. Next to Bragança and Guarda, the largest number of sampling sites was situated in the Porto and Coimbra districts. Over 1/3 of all samples were gathered in the Porto district, whereas more than 5% originated from (in decreasing order) Braga, Bragança, Coimbra, Guarda, Aveiro and Faro. More than 30% of the sampling sites were situated between 501 and 1,000 m a.s.l., with about 15% of them in or near the littoral zone (0–10m), and between 201 and 500 m a.s.l. The surveys in mainland Portugal were mainly conducted by Portuguese researchers between 2009 and 2016. Belgian researchers contributed to a far smaller extent: Marc Pollet (Belgium) and Anja De Braekeleer (Belgium) visited Portugal in May 2014, and Jonas Mortelmans (Belgium) added a few samples from 2018. The general aim of this project was to get a first comprehensive account of the dolichopodid fauna of mainland Portugal (thus far only 34 species had been recorded from the country). A total of 789 samples were ultimately investigated, 761 of which contained Dolichopodidae. Not taking the 53 samples collected by Marc Pollet & Anja De Braekeleer into account, between 2009 and 2016 on average 88 samples were collected per year, with peaks of 150 and 146 in 2011 and 2013 respectively, and a minimum of 46 in 2012.|
|Quality Control||There was little need for any quality control during the sampling phase of this project. Collecting was mainly executed in promising sites for Diptera. A subsample of representative Diptera species (incl. Dolichopodidae) was systematically retrieved from the sweepnet by Rui Andrade and Ana Conçalves (principal collectors), whereas all Dolichopodidae were retained by Marc Pollet and Anja De Braekeleer. All samples were stored in 75% alcohol solution in cool and dark conditions.|
Method step description:
- Data for this dataset are retrieved, unified and standardized from source data through a series of RMarkdown scripts and Openrefine scripts that are versioned on GitHub (https://github.com/inbo/data-publication/tree/master/datasets/portugal-dolichopodidae-occurrences) and which include the following steps:
- Standardize the dataset to Darwin Core, sampling event dataset type. Containing a sample core and a occurrences extension.
- Conversion of the original coordinates to decimal coordinates, WGS84
- The resulting Darwin Core data files are uploaded to the INBO IPT and documented with metadata.
- The dataset is published and registered with GBIF.
|Collection Name||MAPC (Private Collection of Marc Pollet)|
|Specimen preservation methods||Alcohol|
- Pollet, M., Andrade, R., Gonçalves, A., Andrade, P., Jacinto, V., Almeida, J., De Braekeleer, A., Van Calster, H. & Brosens, D. (2019). Dipterological surveys in Portugal unveil 200 species of long-legged flies, with over 170 new to the country (Diptera: Dolichopodidae). Zootaxa: [01 Aug 2019, 4649(1):zootaxa.4649.1.1]