Relatives

Distribution area of perennial ryegrass (Lolium perenne L.).

Object description Download GIS-layers

Authors:

Experts N.I. Dzyubenko & E.A. Dzyubenko
GIS-expert A.N. Dzyubenko

Date of creation:

17.09.2004

Scale:

1:20,000,000.

Exactness of map:

The map was created using maps of 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:

Map is a vector file consisting of polygons and points. Locations of the species are represented by points, while the area of possible distribution of the species is represented by polygons.

Exactness of classifier:

Light-colored points represent species locations referenced in published sources. Dark-colored points represent species locations reported in the VIR database (N.I. Vavilov All-Russian Research Institute of Plant Industry) and BIN database (Komorov Institute of Botany). Polygons are based on published sources, herbarium samples, political boundaries and ecological descriptions.

Method of map construction:

In order to construct the distribution area of Lolium perenne, published maps of species distribution (Grossheim, 1939; Cereals of Ukraine, 1977; Harkevich, 1985; Hulten & Fries, 1986), herbaria data (Komarov Botanical Institute (BIN)), and collected germplasm data (N.I. Vavilov All-Russian Institute of Plant Industry (VIR), St. Petersburg) were used. Our point of view as to the distribution of the species within Russia and the adjacent states partly coincides with that of Hulten & Fries (1986). The mapped distribution area is based on all available data. The area has a disjunctive quality and consists of four polygons and separate points. The largest polygon occupies western and central parts of the European region of the former USSR (except the Arctic), and extends to Western Siberia (all regions except the north). In the south, there are two polygons that cover the mountainous regions of Central Asia. In the southwest, there is one polygon that covers the mountainous regions oh the Crimea and the Caucasus (except the Talysh and Kura lowlands). The points, which were not included in the general distribution area, represent secondary, invasive sites of the species. The polygon shown in Hulten & Fries (1986) in western Turkmenia was confirmed neither by our studies nor other publications (Nikitin & Geldikhanov, 1988).

Sources of the data:

Cereals of Ukraine. 1977. Kiev: Naukova Dumka, 518 pp. (in Russian).
Database of VIR materials (N.I. Vavilov All-Russian Institute of Plant Industry) and BIN materials (the Komorov Institute of Botany).
Grossheim A.A. 1939. Flora of the Caucasus. Vol. 2. Baku: AzFAN, pp. 587. (in Russian).
Harkevich S.S., ed. 1985. Vascular Plants of the Soviet Far East. Vol. 1. St. Petersburg: Nauka, 390 p. (in Russian).
Hulten E., Fries M. 1986. Atlas of Northern European Vascular Plants North of the Tropic of Cancer. Vol. 1-3. Konigstein, 1172 pp.

Rights and copyrights:

Copyright on the map and its description belongs to its authors.
Copyright on the photos belongs to N.I. Dzyubenko.