The data dune_trait_env contains three data frames with abundance
data of 28 plant species in 20 samples (relevés), trait data (9 traits:
of which 5 morphological and 4 ecological (Ellenberg indicator values) and
environmental data (9 environmental variables, four of which are geographic
coordinates). Compared to the data in Jongman et al. (1987, 1995), the two
moss species are lacking, and the traits of plant species and the geographic
coordinates of the samples are added. The data and the following description
are an edited version of the DataKey in the Jamil2013_AJ data set in the
CESTES database (Jeliazkov et al. 2020).
The Dune Meadow Data originate from a MSc thesis report of Batterink & Wijffels (1983). It consisted of 80 relevés in about 68 dune meadows (lots) on the island Terschelling in the Netherlands. A subset of their data was selected by Caspar Looman as an example data set for the edited book Jongman, ter Braak and van Tongeren (1987, 1995). The subset consists of 20 relevés, 28 species (and 2 mosses, excluded here) and 5 environmental variables.
The trait data were taken from the LEDA database by Jamil et al 2013. The spatial coordinates were retrieved by geo-referencing in GIS of the maps in Batterink & Wijffels (1993) by Ruut Wegman and Cajo ter Braak. The X, Y coordinates are by geo-referencing the relevé locations on Kaart 3a, 3b and 3c; the X_lot, Y_lot coordinates are from Kaart 2a, 2b and 2c.
For the Ellenberg indicator values see Ellenberg (1992).
The data dune_trait_env is a list with elements that are data frames
each
comm: community data; vegetation data.
traits: trait data, taken from the LEDA database.
envir: environmental data, taken from Jongman et al. (1987,1995).
The community data collection was done by the Braun-Blanquet method; the data are recorded according to the ordinal scale of van der Maarel (1979, Vegetatio, 39, 97-114); see pages XVII-XVIII and 18 in Jongman, ter Braak & van Tongeren 1995. Nomenclature follows Heukels-Van der Meijden (1983) Flora van Nederland, 20th ed.
The morphological traits are
SLA: Specific Leaf Area
Height: Canopy height of a shoot
LDMC: Leaf dry matter content
Seedmass: Seed mass
Lifespan: Life span. Nominal; annual vs. perennial
The ecological traits (habitat requirements) are the Ellenberg values
F: Moisture (ranging [1 to 12] (low to high))
R: Soil acidity, ranging [1 to 9] (acidic to alkaline)
N: Nitrogen requirement, ranging [1 to 9] (low to high)
L: Light requirement, ranging [1 to 9] (low to high)
The data frame envir contains the environmental variables
A1: horizon thickness
Moist: Moisture content of the soil (a five point scale)
Mag: Grassland management type
Use: type of use (Agricultural grassland use (1) hay production
(2) intermediate (3) grazing)
Manure: Quantity of manure applied based on N and P manuring
(N/P class in B&W 1983)
X: longitude geographical coordinates (m) of the 2x2 m2
sample (relevé)
Y: latitude geographical coordinates (m) of the 2x2 m2
sample (relevé)
X_lot: longitude geographical coordinates (m) of the lot center
Y_lot: latitude geographical coordinates (m) of the lot center
The management types are standard farming (SF), biological farming (BF), hobby farming (HF), nature conservation management (NM). The coordinates are Rijksdriehoekscoordinaten in meters. https://nl.wikipedia.org/wiki/Rijksdriehoekscoordinaten
Batterink, M. & Wijffels, G. (1983) Een vergelijkend vegetatiekundig onderzoek naar de typologie en invloeden van het beheer van 1973 tot 1982 in de duinweilanden op Terschelling. Landbouwhogeschool. ISN 215909.01. WUR library stacks 704B58.
Ellenberg, H. (1992) Indicator values of plants in Central Europe. Scripta Geobotanica, 18, 258 pp.
Jamil, T., Ozinga, W.A., Kleyer, M. & ter Braak, C.J.F. (2013) Selecting traits that explain species–environment relationships: a generalized linear mixed model approach. Journal of Vegetation Science, 24, 988-1000. tools:::Rd_expr_doi("10.1111/j.1654-1103.2012.12036.x").
Jeliazkov, A., Mijatovic, D., and 78 others. (2020) A global database for metacommunity ecology, integrating species, traits, environment and space. Scientific Data, 7. tools:::Rd_expr_doi("10.1038/s41597-019-0344-7").
Jongman, R.H.G., ter Braak, C.J.F. & van Tongeren, O.F.R. (1987) Data analysis in community and landscape ecology. Pudoc, Wageningen. ISBN 90-220-0908-4.
Jongman, R.H.G., ter Braak, C.J.F. & van Tongeren, O.F.R. (1995) Data analysis in community and landscape ecology. Cambridge University Press, Cambridge. ISBN 0-521-47574-0. https://edepot.wur.nl/248017.
Kleyer, M., and 33 others (2008) The LEDA Traitbase: a database of life-history traits of the Northwest European flora. Journal of Ecology, 96, 1266-1274. tools:::Rd_expr_doi("10.1111/j.1365-2745.2008.01430.x").