Relatives
Area of strawberry clover (Trifolium fragiferum) .
Object description Download GIS-layers
Authors:
The experts - Dzyubenko, N.I., E.A. Dzyubenko.The GIS-Expert - Dzyubenko, A.N.
Date of creation:
08.12.2003.Scale:
1:20 000 000.Accuracy of map:
The map was created using maps that had the following scale 1:10 000 000-1:80 000 000.The projection:
"Alber's Equal Area Conic for Russia", 9, 1001, 7, 100, 0, 44, 68, 0, 0.Basic contents:
Vector map. Area of species distribution is shown by polygons, actual location occurrence is shown by points.Accuracy of classifier:
Point data were obtained from literature sources and herbarium specimens. Polygons are based on literature sources, herbarium samples, and field surveys by the authors. Light-colored points are locations of species referenced in literature sources. Dark-colored points are locations of the species that were reported from the VIR and BIN databases (N.I. Vavilov Institute, 2003 & V.L. Komarov Institute.Method of map production:
Published literature was reviewed, including Atlases, monographs and papers. Literature used included: Grossgheim (1952), Hulten & Fries (1986) and Meusel et al. (1965). Points not included in polygon represent invasion by the species.Occurrence data were obtained from herbarium specimens, floras, monographs and papers. Data were then compiled through scanning and geo-referencing to develop a composite vector map. The biologist, together with the GIS specialist, drew a new plant distribution area based on compiled data.
Reference citations:
Grossgheim, A.A. 1952. Genus Trifolium. Flora of the Caucasus. Moscow-Leningrad: AN USSR. V. 5: 194-221. (In Russian)Hulten E., Fries M. 1986. Atlas of North European Vascular Plants North of the Tropic of Cancer. Konigstein. V. 1-3: 1172.
Mosel H. 1965. Comparative Chorology of the Flora of Central Europe. Jena. 583 p.
N.I. Vavilov Institute, Herbarium Department, 2003. Database of geographic coordinates (in house), St. Petersburg, Russia.
V.L. Komarov Botanical Institute [LE], Database, St. Petersburg, Russia.