Weeds
Area of distribution and weediness of Vetch Tetra-Seed Vicia tetrasperma (L.) Moench.
Object description Download GIS-layers
Authors:
Object specialist A.Yu. Doronina, GIS-specialist I.A. Budrevskaya.Date of creation:
20.09.2004.Scale:
1:20 000 000.Accuracy of map:
It is created on materials of maps of natural scale 1:15 000 000-1:100 000 000 and on information taken from the open-published literature.Projection:
"Alber's Equal Area Conic for the USSR", 9, 1001, 7, 100, 0, 44, 68, 0, 0.Basic contents:
Vector map. Area of distribution is shown by polygons (main distribution) and by dots (sporadic distribution). Zone of weediness is shown by polygons.Accuracy of the classifier:
Within the weed area the zones of weediness are shown, where Vicia tetrasperma is pernicious.The zones of weediness are shown - established by criteria of occurence (50% of fields where this species is found) and abundance, expressed as projective cover of this species in the field (more than 15 % to the field area (Tanskii et al., 1998).Procedure of map drawing:
The map is made by results of the analysis of the open-published cartographical materials and literature. The map of E. Hulten & M. Fries (1986) was taken as a prototype, supplemented by maps of distribution from A. I. Tolmachev (1976), S. S. Kharkevich (1989). The northern, southern, western and eastern boundaries of area are outlined according to E. Hulten, M. Fries (1986) and amplificated according to V. L. Komarov (1936) (northern, southern, western and eastern boundaries), A. I. Tolmachev (1962; 1976) (northern and eastern boundaries), E. V. Dorogostaiskaya (1972) (northern boundary), S. S. Kharkevich (1989) (northern, southern and eastern boundaries), A. V. Polozii & L. I. Malyshev (1994). The northern, southern, western and eastern boundaries of area are outlined according with the same sources. The sporadic distribution given according to E. Hulten & M. Fries (1986), E. V. Dorogostaiskaya (1972), A. I. Tolmachev (1976), S. S. Kharkevich (1989). The zone of weediness is determined after V. V. Nikitin (1983) and specified according to data on abundance, frequency of occurrence or weediness of the weed, taken from the below-mentioned references (for exception "Manuals" and "Flores"). Within the weed area the zones of occurence and abundance (Tanskii et al., 1998) - occurence of Cuscuta europaea exceeded 20% with its abundance 3 numbers.Sources of the data:
Dorogostaiskaya, E. V. 1972. Weed plants of Extreme North of USSR. Leningrad: Nauka, 172 p. (in Russian).Hulten E. & Fries M. 1986. Atlas of North European Vascular Plants, North of the Tropic of Cancer: Konigstein. V. 1-3. 1172 p. (in English).
Keller B.A., ed. 1934. Weed plants of the USSR. V. 3. Leningrad: AN SSSR. 448 p. (in Russian).
Kharkhevich S.S., ed. 1989. Flora of the Soviet Far East. Leningrad: Nauka. V. 4. P. 309 (picture N 91, p. 305) (in Russian).
Komarov V.L., ed. 1948. Flora of the USSR. Moscow & Leningrad: AN SSSR. V. 13: 410-411. (in Russian)
Nikitin V.V. 1983. Weeds in the flora of the USSR. Leningrad: Nauka. 454 p. (in Russian)
Shishkin B.K., ed. 1963. Botanical atlas. Moscow & Leningrad: Selkhozgiz, 504 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).
Tolmachev A.I. ed. 1976. Flora of North-East of the European part of the USSR. Leningrad: Nauka. V.4. 312 p. (in Russian)