Database Report

Dutch National Vegetation Database

Stephan Hennekens

GIVD Database ID: EU-NL-001	Last update: 2018-11-08
Dutch National Vegetation Database	Web address: http://www.synbiosys.alterra.nl/lvd
Database manager(s): Stephan Hennekens (Stephan.Hennekens@wur.nl)
Owner: A third part is property of by Alterra, the other part is owned by many different parties
Scope: The database covers all existing plant communities in the Netherlands from 1868 (!) up to now.
Abstract:
Availability: according to a specific agreement	Online upload: no	Online search: yes
Database format(s): TURBOVEG, PostgreSQL	Export format(s): TURBOVEG, MS Access, MySQL, Excel
Plot type(s): normal plots, time series	Plot-size range (m²): 0.1 to 1000
Non-overlapping plots: 600000	Estimate of existing plots: 750000	Completeness: 80%	Status: completed and continuing
Total no. of plot observations: 650933	Number of sources (biblioreferences, data collectors): 80	Valid taxa: 922
Countries (%): NL: 100
Formations: Forest: 14% = Semi-aquatic: 9%; Terrestrial: 4% // Non Forest: 86% = Aquatic: 14% (Haline water: 1%; Fresh water: 13%); Semi-aquatic: 20% (Haline water: 5%; Fresh water: 15%); Terrestrial: 52% (Non arctic-alpin: 52% [Natural: 7%; Semi-natural: 30%; Anthropogenic: 16%])
Guilds: all vascular plants: 100%
Plot size categories (%): < 1 m2: 1%; 1-10 m2: 22%; 10-100 m2: 27%; 100-1000 m2: 21%; 1000-10000 m2: 1%; unknowmn: 28%;
Environmental data (%):
Performance measure(s): presence/absence only: 0.6%; cover: 99.4%
Geographic localisation: GPS coordinates (precision 25 m or less): 50%; small grid (not coarser than 10 km): 40%; political units or only on a coarser scale ( above 10 km): 10%
Sampling periods: before 1920: 0.04%; 1920-1929: 0%; 1930-1939: 1%; 1940-1949: 1%; 1950-1959: 1%; 1960-1969: 2%; 1970-1979: 15%; 1980-1989: 21%; 1990-1999: 39.86%; 2000-2009: 19%; 2010-2019: 0%; unknown: 0.1%
Information as of 2026-05-19; further details and future updates available from http://www.givd.info/ID/EU-NL-001

Stephan Hennekens* (Stephan.Hennekens@wur.nl)
Alterra, NETHERLANDS
* corresponding author