Relatives

The distribution area of Willow-leaf pear. - Pyrus salicifolia Pall.

Object description Download GIS-layers

Authors:

Expert botanist I.G. Chuhina
GIS-expert O.V. Pereloma

Date of creation:

26.04.2005

Scale:

1:20,000,000.

Accuracy of map:

Map was created using herbarium specimens and maps of scale 1:13,000,000-1:25,000,000.

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 regions of possible distribution of the species are represented by polygons.

Accuracy of qualifier:

Points represent species locations referenced in published sources and locations from which herbarium specimens were taken. Polygons are based on generalized information from published sources and herbarium specimens.

Method of map construction:

The species distribution data were obtained from the database of species locations, the Information Retrieval System, "Wild-growing relatives of cultural plants of Russia" (NTC "Informregistr" № 0229905883), Grossgeim (1952) and Sokolov et al (1980). The northern, southern, northwestern, and southwestern borders of the distribution area were drawn in accordance with Grossgeim (1952) and with information from herbarium specimens (N.I. Vavilov All-Russian Institute of Plant Industry and the Komarov Botanical Institute (St. Petersburg)). This information is stored in the IRS database. In Talysh, the borders of the distribution area were constructed in accordance with information on herbarium specimens from the IRS database.

References:

Grossgeim A.A. 1962. Flora of the Caucasus. Vol. 5. Moscow/Leningrad: Publishing House of the USSR Academy of Sciences, Map #22. (in Russian).
Herbarium N.I. Vavilov All Russian Institute of Plant Industry (WIR) (St.-Petersburg, Russia), Komarov Botanical Institute (LE) (Saint-Petersburg).
Information Retrieval System (IRS), "Wild relatives of cultural plants of Russia", 1999. N.I. Vavilov All-Russian Institute of Plant Industry (WIR) (St. Petersburg, Russia) NTC "Informregistr" № 0229905883.
Sokolov S.I., Svjaseva O.A., Kubli V.A. 1980. Areas of distribution of trees and shrubs in the USSR. vol.2. Leningrad: Nauka, map # 49G.

Right and copyright:

Copyright on this map and its description belongs to its authors.
Copyright on the picture belongs to W. Semenov.