Weeds

Area of distribution and harmfulness of Oberna behen (L.) Ikonn.

Object description Download GIS-layers

Authors:

Object specialist - T. D. Sokolova, GIS-specialist - I.A.Budrevskaja.

Date of creation:

15.12.2003

Scale:

1:20 000 000

Accuracy of the map:

It is created on materials of maps of natural scale 1:80 000 000 and larger and on literature data

Projection:

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

Basic contents:

Vector map. Area is shown by polygons (basic distribution) and by points (sporadic distribution). Zone of harmfulness is shown by polygons

Accuracy of the classifier:

Within weed area the zones of basic and sporadic distribution are shown, and the zone of harmfulness, where Oberna behen is a pernicious weed

Procedure of map drawing:

Areas of basic distribution, sporadic distribution and harmfulness are established according to the analysis of the open-published maps and literature. The area of Oberna behen is based on the map from Volkov A.N., 1935. Limits of the zone of harmfulness are established according to Nikitin V.V., 1979, 1983 and adjusted with the limits of arable lands.

Sources of the data:

Dorogostayskaya E.V. 1972. Weed plants of the Far North of the USSR. Leningrad: Nauka, p.101.
Nikitin V.V. 1979. Geographical distribution of the most important weed species of the USSR and their dinamics/ Botanical journal. V.64. №7, p.p.943-949.
Nikitin V.V. 1983. Weed plants of the flora of the USSR. Leningrad: Nauka, p.p. 48-54.
Tolmachev A.I. 1976. Flora of Northeast of the European part of the USSR. V.II. Leningrad: Nauka, p.p. 229-230.
Ulyanova T.N. 1983. Weed plants of the Soviet Far East. The catalogue of world collection of VIR. Issue 374. Leningrad, VIR, p.20.
Volkov A.N. 1935. Regions of distribution of the most important weed species in the USSR. Moscow-Leningrad: State printing office, p.p.92-93.

Right and copyright:

Copyright on this map and description belongs to their authors.