The dataset is publicly available (data portal, data archive) and can be used without restrictions, but must be acknowledged and cited correctly.
other/additional criteria:
Data has to be downloaded from the site www.ufz.de/biolflor
Information on data contributors and authors can also be viewed at site www.ufz.de/biolflor
citation of this dataset:
author(s):
Klotz, S., Kühn, I. & Durka, W. [Hrsg.]
title and journal (name, number, pages):
BIOLFLOR - Eine Datenbank zu biologisch-ökologischen Merkmalen der Gefäßpflanzen in Deutschland. - Schriftenreihe für Vegetationskunde 38. Bonn: Bundesamt für Naturschutz.
AND
Kühn, I., Durka, W. and Klotz, S. 2004. BiolFlor – a new plant-trait database as a tool for plant invasion ecology. Diversity & Distributions, 10(5/6): 363-365. PDF
Were any quality control procedures applied to your dataset?
yes
quality control protocols and comments:
data were integrated from several sources, most of them had quality control proceldures, the final database has been controlled via several queries to check inconsistences