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Meetnetten.be - Sightings for Natterjack toad in Flanders, Belgium

Dataset homepage

Citation

Piesschaert F, Speybroeck J, Brosens D, Westra T, Desmet P, Ledegen H, Van de Poel S, Pollet M (2025). Meetnetten.be - Sightings for Natterjack toad in Flanders, Belgium. Version 1.16. Research Institute for Nature and Forest (INBO). Sampling event dataset https://doi.org/10.15468/2xfw8y accessed via GBIF.org on 2025-06-14.

Description

Meetnetten.be - Sightings for Natterjack toad in Flanders, Belgium is a sampling event dataset published by the Research Institute of Nature and Forest (INBO). It is part of the Meetnetten.be suite of monitoring networks for priority species in Flanders, in which data are collected at fixed locations using a standardized protocol (https://meetnetten.be). This dataset contains site counts for 1 priority species (Epidalea calamita), as well as other amphibians observed during sampling. Here it is published as a standardized Darwin Core Archive and includes for each sampling event an eventID, date, location and sampling protocol (in the event core) and for each occurrence an occurrenceID, the number of recorded individuals, behaviour, sex, status, (present/absent) and scientific name (in the occurrence extension). Issues with the dataset can be reported at https://github.com/inbo/meetnetten-occurrences/issues

Generalized and/or withheld information: as these are sensitive priority species, location information is generalized to 1, 5 or 10 km Universal Transverse Mercator (UTM) grid cells. Original locations are available upon request.

We have released this dataset to the public domain under a Creative Commons Zero waiver. We would appreciate it if you follow the INBO norms for data use (https://www.inbo.be/en/norms-data-use) when using the data. If you have any questions regarding this dataset, don't hesitate to contact us via the contact information provided in the metadata or via opendata@inbo.be.

For all published Meetnetten.be datasets, see https://www.gbif.org/dataset/search?project_id=meetnetten.be

Sampling Description

Study Extent

Epidalea calamita or the Natterjack toad is a pioneer species that thrives in dynamic environments. The species reproduces from April to August, when the animals gather in breeding pools and the males call loudly.

Sampling

Due to the ephemeral nature of the breeding waters of this species and its overall dynamic nature, monitoring is executed at site (and not waterbody) level. A long reproductive period results into the presence of multiple life stages throughout the year. Therefore, three nocturnal visits per site are made and all life stages are counted along a predetermined route running between water bodies: · Egg strands, · Tadpoles, · Terrestrial juveniles (< 2 cm), · Terrestrial juveniles (> 2 cm), · Adults observed · Adults heard (calling males) Sampling was done using the protocol described in De Bruyn et al. (2015), updated by Speybroeck et al. (2020), and explained to volunteers in Lewylle et al. (2017).

Quality Control

Data are collected using a predefined sampling protocol.

Method steps

  1. Researchers from INBO and Natuurpunt Studie define and document the appropriate sampling protocol for the target species.
  2. Fieldwork is planned and coordinated by Natuurpunt Studie, using https://meetnetten.be.
  3. Data are collected in the field by specialized volunteers, using the predefined sampling protocol.
  4. Volunteers enter the collected data in https://meetnetten.be.
  5. A custom SQL view is created in the meetnetten.be database to map the original data to Darwin Core as an event core with an occurrence extension
  6. The Darwin Core views are connected to the INBO IPT and documented with metadata.
  7. The dataset is published and registered with GBIF.

Taxonomic Coverages

The target species for Meetnetten.be are listed at https://meetnetten.be/#group-1. Other salamanders observed during the sampling are also included. This dataset covers the Natterjack sighting protocol, for which there are 1 target species.
  1. Animalia
    rank: kingdom
  2. Chordata
    rank: phylum
  3. Amphibia
    rank: class
  4. Anura
    rank: order
  5. Epidalea calamita
    common name: Rugstreeppad rank: species

Geographic Coverages

Flanders, Belgium

Bibliographic Citations

  1. Luc De Bruyn, Jeroen Speybroeck, Dirk Maes, Geert De Knijf, Thierry Onkelinx, Frederic Piesschaert, Marc Pollet, Toon Westra & Paul Quataert (2015). Monitoringsprotocol kikkers en padden. Rapporten van het Instituut voor Natuur- en Bosonderzoek 2015 (INBO.R.11336466). Instituut voor Natuur- en Bosonderzoek, Brussel. - INBO.R.11336466
  2. Lewylle I., S. Van de Poel, M. Segal & H. Ledegen. 2018. Veldwerkhandleiding Rugstreeppad. Natuurpunt Studie, Mechelen -
  3. Speybroeck J, De Bruyn L, Van de Poel S, Ledegen H, Westra T (2020). Monitoringsprotocol amfibieën en reptielen. Versie 2.0. Rapporten van het Instituut voor Natuur- en Bosonderzoek 2020 (22). Instituut voor Natuur- en Bosonderzoek, Brussel. - https://doi.org/10.21436/inbor.17954118.

Contacts

Frederic Piesschaert
originator
position: researcher
Research Institute for Nature and Forest (INBO)
BE
email: frederik.piesschaert@inbo.be
userId: http://orcid.org/0000-0002-5843-646X
Jeroen Speybroeck
originator
position: Researcher
Research Institute for Nature and Forest (INBO)
BE
email: jeroen.speybroeck@inbo.be
userId: http://orcid.org/0000-0002-7241-7804
Dimitri Brosens
originator
position: Researcher
Research Institute for Nature and Forest (INBO)/ Belgian Biodiversity Platform
BE
email: dimitri.brosens@inbo.be
userId: http://orcid.org/0000-0002-0846-9116
Toon Westra
originator
Research Institute for Nature and Forest (INBO)
BE
email: toon.westra@inbo.be
userId: http://orcid.org/0000-0003-2478-9459
Peter Desmet
originator
position: Researcher
Research Institute for Nature and Forest (INBO)
email: peter.desmet@inbo.be
userId: http://orcid.org/0000-0002-8442-8025
Hannes Ledegen
originator
position: Researcher
Natuurpunt
BE
homepage: http://www.natuurpunt.be
Sam Van de Poel
originator
position: Researcher
Natuurpunt
BE
homepage: http://natuurpunt.be
Marc Pollet
originator
position: Research manager
Research Institute for Nature and Forest (INBO)
BE
email: marc.pollet@inbo.be
userId: http://orcid.org/0000-0001-5198-5928
Dimitri Brosens
metadata author
position: researcher
Research Institute for Nature and Forest (INBO)/ Belgian Biodiversity Platform
BE
email: dimitri.brosens@inbo.be
userId: http://orcid.org/0000-0002-0846-9116
Peter Desmet
metadata author
position: Researcher
Research Institute for Nature and Forest (INBO)
BE
email: peter.desmet@inbo.be
userId: http://orcid.org/0000-0002-8442-8025
Dimitri Brosens
user
email: dimitri.brosens@inbo.be
Frederic Piesschaert
administrative point of contact
position: researcher
Research Institute for Nature and Forest (INBO)
BE
email: frederik.piesschaert@inbo.be
userId: http://orcid.org/0000-0002-5843-646X
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