RAVON (NL) - Network Ecological Monitoring Reptiles

Ingo Janssen1, Marnix de Zeeuw2, Niels Raes3, Jeroen Creuwels4

1 RAVON, Science Park 904, NL- 1098 XH, Amsterdam, Netherlands; 2 Statistics Netherlands (CBS), Henri Faasdreef 312, 2490 HA, The Hague, Netherlands; 3 NLBIF, PO Box 9517, NL-2300 RA, Leiden, Netherlands; 4 NLBIF, PO Box 9517, NL-2300 RA, Leiden, Netherlands

Corresponding author(s): Ingo Janssen (i.a.w.janssen@uva.nl)

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

Janssen I (2021): RAVON (NL) - Network Ecological Monitoring Reptiles. v1.13. Reptile, Amphibian and Fish Conservation Netherlands (RAVON). Dataset/Occurrence. http://ipt.nlbif.nl/resource?r=ravon_nem_rep&v=1.13

Abstract

The Dutch reptile populations are being monitored intensively within the scope of the Dutch Network Ecological Monitoring (NEM). Since 1994 volunteers, coordinated by RAVON (Reptile, Amphibian and Fish Conservation Netherlands), monitor reptiles on an annual base. All seven indigenous species are monitored on transects that are examined seven times a year. The data are used to monitor population trends and patterns and to support legal reporting obligations, scientific research and policy and conservation related issues. Locality data for GBIF are provided on a 5 x 5 km scale.

Keywords: Occurrence, Observation, reptiles, The Netherlands, monitoring, trends, ecology, Occurrence

Data published through GBIF: http://ipt.nlbif.nl/resource?r=ravon_nem_rep

Taxonomic coverage

General taxonomic coverage description: All indigenous reptile species in The Netherlands are included in the monitor network.
Taxonomic ranks
Species: Anguis fragilis, Lacerta agilis, Zootoca vivipara, Podarcis muralis, Coronella austriaca, Natrix natrix, Vipera berus
Common names: Slow Worm, Sand Lizard, Viviparous Lizard, Common Wall Lizard, Smooth Snake, Grass Snake, Adder

Spatial coverage

General spatial coverage: The Netherlands
Coordinates: 50°37'48''N and 53°38'24''N Latitude; 2°36'36''E and 7°24'36''E Longitude 

Temporal coverage: January 1, 1994 - December 31, 2015

Methods

Method step description: Trends and indices are calculated by Statistics Netherlands (CBS) using the TRIM-software package.

This dataset summarizes the observations per km2 for each year in an occurrence value per species.
Study extent description: Transects are monitored within a two hour timespan. A transect typically consist of only one habitat type.
Sampling description: Transects are visited seven times a year under favourable weatherconditions. All encountered reptiles are counted.
Quality control description: The raw data are validated by the coordinator. Statistics Netherlands (CBS) runs an extensive control of the monitor data before calculating trends and indices.

Datasets

Dataset description
Object name: Darwin Core Archive RAVON (NL) - Network Ecological Monitoring Reptiles
Character encoding: UTF-8
Format name: Darwin Core Archive format
Format version: 1.0
Distribution: http://ipt.nlbif.nl/archive.do?r=ravon_nem_rep
Publication date of data: 2021-11-18
Language: English
Licences of use: Creative Commons Attribution (CC-BY) 4.0 License

Metadata language: English
Date of metadata creation: 2015-11-03
Hierarchy level: Dataset