Meetnetten.be - Exuviae counts for dragonflies in Flanders, Belgium

Frederik Piesschaert1, Geert De Knijf1, Dimitri Brosens2, Toon Westra1, Peter Desmet1, Hannes Ledegen3, Marc Pollet1

1 Research Institute for Nature and Forest (INBO), , Belgium; 2 Research Institute for Nature and Forest (INBO)/ Belgian Biodiversity Platform, , Belgium; 3 Natuurpunt, , Belgium

Corresponding author(s): Frederik Piesschaert (frederick.piesschaert@inbo.be)Geert De Knijf (geert.deknijf@inbo.be)Dimitri Brosens (dimitri.brosens@inbo.be)Toon Westra (toon.westra@inbo.be)Peter Desmet (peter.desmet@inbo.be)Hannes Ledegen (hannes.ledegen@natuurpunt.be)Marc Pollet

Received {date}; Revised {date}; Accepted {date}; Published {date}

Citation: Combination of authors, year of data paper publication (in parentheses), Title, Journal Name, Volume, Issue number (in parentheses), and doi of the data paper.

Resource Citation

Piesschaert F, De Knijf G, Brosens D, Westra T, Desmet P, Ledegen H, Pollet M (2021): Meetnetten.be - Exuviae counts for dragonflies in Flanders, Belgium. v1.10. Research Institute for Nature and Forest (INBO). Dataset/Samplingevent. https://doi.org/10.15468/ue87ux https://doi.org/10.15468/ue87ux

Abstract

Meetnetten.be - Exuviae counts  for dragonflies 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 exuviae (larval skin remained behind after ecdysis) counts for 1 priority dragonfly species (Gomphus flavipes). 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), the length of the transect (in the measurement or fact extension) and for each occurrence an occurrenceID, the number of recorded individuals, status (present/absent), life stage, sex 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

Keywords: Samplingevent, Odonata, dragonflies, damselflies, monitoring, priority species, Flanders, Samplingevent

General description

Additional information: We like to thank the "Libellenvereniging Vlaanderen” (https://www.odonata.be) for their input in creating this dataset.

Project details

Project title: Meetnetten.be
Personnel: Frederic Piesschaert
Funding: Flemish Government
Study area descriptions/descriptor: Flanders, Belgium
Design description: Each monitoring network consists of fixed sample locations in which the target species is 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.

Data published through GBIF: https://ipt.inbo.be/resource?r=meetnetten-libellen-larvenhuidjes-occurrences

Taxonomic coverage

General taxonomic coverage description: The target dragonfly species for Meetnetten.be are listed at https://meetnetten.be/#group-6. Other dragonflies observed during the sampling are momentarily not included. This dataset covers the larval skin protocol, for which there is 1 target species. In a later phase, when the monitoring of Gomphus vulgatissimus is operational, more data will be included.
Taxonomic ranks
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Odonata
Species: Gomphus flavipes
Common names: insects, dragonflies, Rivierrombout

Spatial coverage

General spatial coverage: Flanders, Belgium
Coordinates: 50°40'12''N and 51°30'36''N Latitude; 2°31'48''E and 5°56'24''E Longitude 

Temporal coverage: January 1, 2016 - December 31, 2019

Methods

Method step description: 
- . 	Researchers from INBO and Natuurpunt Studie define and document the appropriate sampling protocol for the target species.
- . 	Fieldwork is planned and coordinated by Natuurpunt Studie, using https://meetnetten.be.
- . 	Data are collected in the field by specialized volunteers, using the predefined sampling protocol.
- . 	Volunteers enter the collected data in https://meetnetten.be.
- . 	A custom SQL view is created in the meetnetten.be database to map the original data to Darwin Core as an event core, occurrence extension and measurement or fact extension.
Study extent description: 1. Gomphus flavipes (River Clubtail / Rivierrombout) occurs in medium-sized to large rivers, preferably with sandy substrate. The habitat of the Flemish population is somewhat different as the species reproduces her in a busy canal with concrete banks (De Knijf et al. 2013). We follow up on this species by counting the larval skins.
Sampling description: Sampling was done using the protocol described in De Knijf et al. (2019) and explained to volunteers in Ledegen et al. (2017).
1. Gomphus flavipes (River Clubtail/ Rivierrombout): During a count of larval skins, the riparian bank is slowly crossed over a length of 500 m and every larval skin found is collected. The location is preferably read with a GPS. Each transect is visited once every 10 days and this in the period from 1 June to 15 August (6 visits in total).
Quality control description: Data are collected using a predefined sampling protocol.

Datasets

Dataset description
Object name: Darwin Core Archive Meetnetten.be - Exuviae counts for dragonflies in Flanders, Belgium
Character encoding: UTF-8
Format name: Darwin Core Archive format
Format version: 1.0
Distribution: https://ipt.inbo.be/archive.do?r=meetnetten-libellen-larvenhuidjes-occurrences
Publication date of data: 2021-04-15
Language: English
Licences of use: Public Domain (CC0 1.0)

Metadata language: English
Date of metadata creation: 2020-06-18
Hierarchy level: Dataset

References
De Knijf G, Ledegen H & Westra T (2019) Monitoringsprotocol Libellen. Versie – 2.0. Rapporten van het Instituut voor Natuur- en Bosonderzoek 2019 (49). Instituut voor Natuur- en Bosonderzoek, Brussel. https://doi.org/10.21436/inbor.17262395
De Knijf G., Adriaens T., Vermylen R. & Van der Schoot P. 2013. Ontdekking van een populatie Rivierrombout (Gomphus flavipes) op het Albertkanaal (België), een van de drukst bevaren kanalen van Europa, en een overzicht van de status in West- en Midden-Europa. Brachytron, 16: 3-17.
Ledegen H & De Knijf G (2017) Veldwerkhandleiding Libellen. Natuurpunt Studie, Mechelen.