Meetnetten.be - Bat maternity roosts counts Flanders, Belgium

Événement d'échantillonnage Observation
Dernière version Publié par Research Institute for Nature and Forest (INBO) le déc. 3, 2025 Research Institute for Nature and Forest (INBO)
Date de publication:
3 décembre 2025
Licence:
CC0 1.0

Téléchargez la dernière version de la ressource en tant qu'Archive Darwin Core (DwC-A), ou les métadonnées de la ressource au format EML ou RTF :

Données sous forme de fichier DwC-A (zip) télécharger 330 enregistrements dans Anglais (20 KB) - Fréquence de mise à jour: quand cela est nécessaire
Métadonnées sous forme de fichier EML télécharger dans Anglais (22 KB)
Métadonnées sous forme de fichier RTF télécharger dans Anglais (16 KB)

Description

Meetnetten.be - Bat maternity roosts counts 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 bat maternity roosts count data of four target bat species (Geoffroy's bat, Brown long-eared bat, Grey long-eared bat and Serotine bat). 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, 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 this dataset includes sensitive priority species, location information is generalized for all bat species to 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

Enregistrements de données

Les données de cette ressource données d'échantillonnage ont été publiées sous forme d'une Archive Darwin Core (Darwin Core Archive ou DwC-A), le format standard pour partager des données de biodiversité en tant qu'ensemble d'un ou plusieurs tableurs de données. Le tableur de données du cœur de standard (core) contient 330 enregistrements.

1 tableurs de données d'extension existent également. Un enregistrement d'extension fournit des informations supplémentaires sur un enregistrement du cœur de standard (core). Le nombre d'enregistrements dans chaque tableur de données d'extension est illustré ci-dessous.

Event (noyau)
330
Occurrence 
399

Cet IPT archive les données et sert donc de dépôt de données. Les données et métadonnées de la ressource sont disponibles pour téléchargement dans la section téléchargements. Le tableau des versions liste les autres versions de chaque ressource rendues disponibles de façon publique et permet de tracer les modifications apportées à la ressource au fil du temps.

Versions

Le tableau ci-dessous n'affiche que les versions publiées de la ressource accessibles publiquement.

Droits

Les chercheurs doivent respecter la déclaration de droits suivante:

L’éditeur et détenteur des droits de cette ressource est Research Institute for Nature and Forest (INBO). En vertu de la loi, l'éditeur a abandonné ses droits par rapport à ces données et les a dédié au Domaine Public (CC0 1.0). Les utilisateurs peuvent copier, modifier, distribuer et utiliser ces travaux, incluant des utilisations commerciales, sans aucune restriction.

Enregistrement GBIF

Cette ressource a été enregistrée sur le portail GBIF, et possède l'UUID GBIF suivante : 1446ada0-18f3-4508-9025-8876f40826a0.  Research Institute for Nature and Forest (INBO) publie cette ressource, et est enregistré dans le GBIF comme éditeur de données avec l'approbation du Belgian Biodiversity Platform.

Mots-clé

Samplingevent; Observation; bats; monitoring; priority species; Flanders

Contacts

Frederic Piesschaert
  • Créateur
  • Personne De Contact
Research Institute for Nature and Forest (INBO)
BE
Luc De Bruyn
  • Créateur
Research Institute for Nature and Forest (INBO)
BE
Ralf Gyselings
  • Créateur
Research Institute for Nature and Forest (INBO)
BE
Daan Dekeukeleire
  • Fournisseur Des Métadonnées
  • Créateur
Research Institute for Nature and Forest (INBO)
BE
Stijn Cooleman
  • Fournisseur Des Métadonnées
  • Créateur
Research Institute for Nature and Forest (INBO) / Belgian Biodiversity Platform
BE
Dimitri Brosens
  • Créateur
Research Institute for Nature and Forest (INBO)
BE
Toon Westra
  • Créateur
Research Institute for Nature and Forest (INBO)
BE
Peter Desmet
  • Créateur
Research Institute for Nature and Forest (INBO)
BE
Sanne Ruyts
Elke Roels
Marc Pollet
  • Créateur
Research Institute for Nature and Forest (INBO)
BE
Natuurpunt Vleermuizenwerkgroep Vlaanderen
vleermuizen@natuurpunt.be
BE

Couverture géographique

Flanders, Belgium

Enveloppe géographique Sud Ouest [50,67, 2,53], Nord Est [51,51, 5,94]

Couverture taxonomique

The four target species of bat maternity roosts counts in Meetnetten.be are listed at https://meetnetten.be/#group-9 (as emergence and attic counts). Other bat species observed during these count events are also included.

Kingdom Animalia
Class Mammalia
Order Chiroptera
Species Eptesicus serotinus (Serotine bat), Plecotus auritus (Brown long-eared bat), Plecotus austriacus (Grey long-eared bat), Myotis emarginatus (Geoffroy's bat)

Couverture temporelle

Date de début / Date de fin 1999-07-01 / 2024-12-31

Données sur le projet

Meetnetten.be is a suite of monitoring networks through which the Flemish Government is collecting high-quality information on 65 priority plant and animal species. These are species on which Flanders has to report to Europe in the framework of the Habitats and Birds Directives, but also other species that are important for the Flemish nature policy.

Titre Meetnetten.be
Identifiant meetnetten.be
Financement Flemish Government
Description du domaine d'étude / de recherche Flanders, Belgium
Description du design Each monitoring network consists of fixed sample locations in which target species are counted based on a standardized protocol. Data collection relies mainly on specialized volunteers, coordinated by the NGO Natuurpunt Studie. Fieldwork is planned and monitored with the web tool https://meetnetten.be, which is also used for entering the collected data.

Les personnes impliquées dans le projet:

Frederic Piesschaert

Méthodes d'échantillonnage

For Serotine bat (Eptesicus serotinus), Brown long-eared bat (Plecotus auritus) and Grey long-eared bat (Plecotus austriacus), two emergence counts took place outside the selected maternity roosts each year: one before juveniles emerge (late May - early June) and one when both adults and juveniles emerge (late July - early August). Emergence counts were conducted from 15 minutes before sunset until 15 minutes after the last bat had exited the building (if no bats were observed, the count lasted until 1 hour after sunset). Emergence counts were supported with handheld ultrasonic detectors, and in some cases with thermal imaging cameras. For Geoffroy's bat (Myotis emarginatus), two complementary protocols were used. Firstly, attic counts inside the roosts: one count took place inside the selected maternity roosts each year, when both adults and juveniles were present (late July - early August). Roosts were visited during the day, and a picture was taken of the bat clusters. The number of bats were then counted on these pictures. Secondly, emergence counts, following the same method as used for the three species mentioned above, were also conducted at one location for a limited period.

Etendue de l'étude Within a maximum of 36 squares in a 5x5 km UTM grid, located throughout Flanders, bats are counted at maternity roosts during late spring or summer.
Contrôle qualité Data are collected using predefined sampling protocols.

Description des étapes de la méthode:

  1. Researchers from INBO and Natuurpunt Studie define and document the appropriate sampling protocols 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 protocols.
  4. Volunteers enter the collected data in https://meetnetten.be.
  5. A custom SQL view is created in the meetnetten.be database (exceptionally combining two protocolIDs due to their complementarity) to map the original data to Darwin Core as an event core and 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.

Métadonnées additionnelles

We like to thank the many volunteers for their input in creating this dataset, especially Hans Vermeiren, Bob vandendriessche, Alex Lefevre, Kris Boers and René Janssen.

Remerciements We like to thank the many volunteers for their input in creating this dataset, especially Hans Vermeiren, Bob vandendriessche, Alex Lefevre, Kris Boers and René Janssen.
Identifiants alternatifs 1446ada0-18f3-4508-9025-8876f40826a0
https://ipt.inbo.be/resource?r=meetnetten-vleermuizen-uitvliegtellingen-occurrences