Relatives

The area of Twisted leaf garlic (Allium obliquum L.).

Object description Download GIS-layers

Authors:

The expert-botanist - Chukhina I.G., the GIS-expert - Sinitsyna T.A.

Date of creation:

21.07.2005.

Scale:

1:20 000 000.

Exactness of the map:

Map is based on data from herbarium specimans and on map having the following scale 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 species are represented by points, areas of possible distribution of species are represented by polygons.

Accuracy of the classifier:

Points represent locations of the species referenced in literature sources and from herbarium specimens. Polygons are based on generalized information from literature sources and herbarium specimens.

Method of map production:

Species location data were obtained from a database of site coordinates of the species in the INFORMATION RETRIEVAL SYSTEM " Wild-growing relatives of cultural plants of Russia " (NTC "Informregistr" № 0229905883, 1999) and from map published by N.V.Friesen (1988).
The species has a disjunctive area. European part of the area, polygon on Urals (south) and part of the area in Balkhash lake region were constructed using information of herbarium materials, which is kept in a database IRS. The borders of small polygons in Kazakhstan (Saur, Tarbagatai) were drawn in accordance with map published by N.Friesen (1988) and were corrected using information of herbarium materials. Western, northern and eastern borders of south-siberian part of the area were constructed using information of herbarium materials, southern border was drawn in accordance with map published by N.Friesen (1988).
We consider that isolated from the basic area location at south-west of Ukraine shouldn't be included to the polygon.

References.

Friesen, N.V. 1988. Onions plants of Siberia. Novosibirsk: Nauka, 184 p. (in Russian).
Herbarium N.I. Vavilov All Russian Institute of Plant Industry (WIR) and Komarovian Botanical Institute (LE) (St.-Petersburg, Russia), Tomsk state university (TK), Moscow state university, South-Siberian botanical garden (SSBG) (Barnaul) and Central Siberian botanical garden (NS) (Novosibirsk).
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.

Right and copyright:

Copyright on this map and description belongs to its authors.
Copyright on the photo belongs to Chukhina I.G.