Ecological parameter: LANDOLT vascular plants - light Switzerland (Alpine region)

Parameter group: habitat related parameters

Explanation:
The light value of a species indicates the average light quantity received in the respective habitats. Species with high light values particularly grow in places with full light and species with low values are found in the shade. Values for trees and shrubs refer to the shade tolerance of seedlings and saplings.

Landolt, E., Bäumler, B., Erhardt, A., Hegg, O., Klötzli, F., Lämmler, W., Nobis, M., Rudmann-Maurer, K., Schweingruber, F.H., Theurillat, J.-P., Urmi, E., Vust, M. & Wohlgemuth, T. (2010): Flora indicativa - Ökologische Zeigerwerte und biologische Kennzeichen zur Flora der Schweiz und der Alpen, 2. Aufl., Haupt Verlag, Bern, Stuttgart, Wien, 378pp.

Type of assignment: single category assignment system (including variation)
A description of the coding system can be found here  Abbreviations/Coding Systems

Abbreviations:

Category name:	Abbreviations:	Explanation:
1	1	deep shade: plant tolerates even less than 3% of relative illumination
2	2	shade: plant tolerates below 3 %, but often below 10 % of relative illumination
3	3	semi-shade: plant rarely tolerates below 10 % of relative illumination
4	4	well-lit places: plant tolerates light shade only occasionally or for short periods
5	5	full light: plant grows only in open and sunny places
variation		range of variation regarding the light value: I - small variation, II - large variation

Assigned taxa for each higher systematic unit:

Taxagroup	Number of assigned taxa / total number of taxa - percentage
Liliopsida	221 / 361 - 61.2%
Lycopsida	4 / 12 - 33.3%
Magnoliopsida	7 / 20 - 35%
Polypodiopsida	11 / 19 - 57.8%
Rosopsida	286 / 399 - 71.6%
Sphenopsida	8 / 9 - 88.8%