Area of distribution and weediness of Carduus uncinatus Bieb.

Object description Download GIS-layers


Object specialist - I.N.Nadtochii,
GIS-specialist - I.A.Budrevskaya.

Date of creation:



1:20 000 000.

Accuracy of the map:

It is created on materials of maps of natural scale 1:10 000 - 1:5 000 000 and on literature data.


"Alber's Equal Area Conic for the USSR", 9, 1001, 7, 100, 0, 44, 68, 0, 0.

Basic content:

Vector map. Area of distribution is shown by polygon (main distribution) and by dots (sporadic distribution). Zone of weediness is shown by polygon.

Accuracy of the classifier:

The weed area is divided into zones of main distribution, sporadic distribution, and weediness. The zone of its weediness is shown, established by criteria of occurrence (% of fields where this species is found) and abundance [expressed as projective cover of this species in the field (in % to the field area)] (Tanskii et al., 1998), i.e.; where the occurrence of this species exceeded 50% with its abundance (projective cover) more than 15%.

Method of map production:

Area and zone of weediness are established according to the analysis of the open published maps and literature. A map compiled by Volkov A.N. (1935) is taken as a prototype. The Caucasian part of the area has been changed. Here the area border is shifted northward according to Grossgeim A.A. (1949) and Galushko A.I. (1980). The sites of sporadic distribution are depicted according to Maevskii (1954), Geideman (1954), Pavlov (1966), Tsvelev (1994). The zone of weediness is allocated after the literature data with use of a map of arable lands. Criterion of its allocation is the published indication of the thistle in the literature as the main weed species in the southern forest-steppe zone (Keller, 1934).

Reference citations:

Galushko A.I. 1980. Flora of the Northern Caucasus. V. 4. Rostov-na-Donu: Rostov Univ. 352 p. (in Russian).
Geideman T.S. 1954. Keys to plants of Moldavian SSR. Moscow & Leningrad: Nauka, 468 p. (in Russian).
Grossgeim A.A. 1949. Keys to plants of the Caucasus. Moscow: Sovetskaya nauka, 747 p. (in Russian).
Keller B.A., ed. 1934. Weed plants of the USSR. V. 1. Leningrad: AN SSSR. 324 p. (in Russian).
Maevskii P.F. 1954. Flora of middle belt of the European part of the USSR. Moscow & Leningrad: Selkhozgiz. 912 p. (in Russian).
Pavlov N. V., ed. 1966. Flora of Kazakhstan. V. 9. Alma-Ata: AN Kaz. SSR. 640 p. (in Russian).
Tanskii V.I., Levitin M.M., Ishkova T.I. & Kondratenko V.I. 1998. Phytosanitary diagnostics in integrated management of cereals. In: Novozhilov K.V., ed. Compendium of methodical recommendations in plant protection. St. Petersburg: VIZR, p. 5-55. (in Russian).
Tsvelev N.N., ed. 1994. Flora of the European part of the USSR. St.-Petersburg: Nauka, V. 7. 317 p. (in Russian).
Volkov A.N., ed. 1935. Areas of distribution of the major weed plants in the USSR. Moscow & Leningrad: State Publishing House of Kolkhoz and Sovkhoz Literature, 152 p. (in Russian).

Right and copyright:

All rights reserved. Copyright 2006© I.N.Nadtochii & I.A.Budrevskaya.

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