Weeds

Area of distribution and weediness of Amethystea caerulea L.

Object description Download GIS-layers

Authors:

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

Date of creation:

20.09.2004.

Scale:

1:20 000 000.

Accuracy of map:

Map was created based on materials of maps of natural scale 1:5 000 000 - 1:100 000 000 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 of species distribution is shown by polygons, and sporadic distribution by points. Zones of weediness are shown by polygons.

Accuracy of classifier:

The weed area is subdivided into two zones, one representing species distribution, and the second where weed is considered a serious pest. Points represent locations where sporadic occurrence has been reported. The zone of weediness was established based on criteria of occurence of this species and abundance (Tanskii et al., 1998). In the limits of this zone A. caerulea is characterized by having a 25-50% frequency of occurrence and 3-4 points of abundance.

Method of map production:

Published literature was reviewed, including Atlases, monographs and papers. Occurrence data were obtained from herbarium specimens, floras, monographs and papers. The area of main distribution of A. caerulea was determined according to the map of Volkov (1935). Limits of the zone of weediness were established according to Nikitin (1983) and Ulyanova (1983, 1998) and adjusted according to the data on abundance and frequency of the species occurrence, which was taken from the references below and adjusted to the limits of arable lands map (Koroljeva et al., 2003). According to Nikitin (1983) and Ulyanova (1983, 1998), A. caerulea often infests mostly grain crops, as well as tilled crops in steppe zones in the South of Eastern Siberia and in the Far East. Data were then compiled through scanning and geo-referencing to develop a composite vector map. The biologist, together with the GIS specialist, drew a composite weed distribution area based on compiled data.

Reference citations:

Buch T.G., Kachura N.N., Shvydkaya V.D., Andreeva E.R. 1981. Weed plants of the Primoskii Territory and their control. Vladivostok: Dal'nevostochnoe Publishing House. 243 p. (In Russian)
Kharkevich S.S., ed. 1995. Vascular plants of the Soviet Far East. V. 7. Saint Petersburg: Nauka. 395 p. (In Russian)
Krasnoborov I.M., ed. 1979. Keys to plants of the South of the Krasnoyarsk Territory. Novosibirsk: Nauka. 672 p. (In Russian)
Krasnoborov I.M., ed. 2000. Keys to plants of the Novosibirsk Region. Novosibirsk: Nauka. 492 p. (In Russian)
Malyshev, L.I., ed. 1997. Flora of Siberia. V. 11. Novosibirsk: Nauka. 296 p. (In Russian)
Nikitin V.V. 1979. Geographical distribution of the most important weed species of the USSR and their dynamics. Botanicheskii zhurnal, 64(7): 943-949. (In Russian)
Nikitin V.V. 1983. Weed plants in the flora of the USSR. Leningrad: Nauka. 454 p. (In Russian)
Pavlov, N.V., ed. 1964. Flora of Kazakhstan. V. 7. Alma-Ata: AN Kazakh SSR. 498 p. (In Russian)
Tanskii V.I., Levitin M.M., Ishkova T.I., Kondratenko V.I. 1998. Phytosanitary diagnostics in integrated managemant of cereals. In: Novozhilov K.V., ed. Compendium of methodical recommendations in plant protection. St. Petersburg: VIZR. 5-55 p. (In Russian)
Tolmachev A.I., ed. 1974. Keys to higher plants of Yakutia. Novosibirsk: Nauka. 544 p. (In Russian)
Ulyanova T.N. 1981. Weed plants in wheat of the USSR. In: Korovina O.N., ed. Catalogue of VIR world collection. Issue 320. Leningrad: VIR. 68 p. (In Russian)
Ulyanova T.N. 1983. Weed plants of the Soviet Far East. In: Korovina O.N., ed. Catalogue of VIR world collection. Issue 374. Leningrad: VIR. 48 p. (In Russian)
Ulyanova T.N. 1998. Weed plants in the flora of Russia and other CIS states. St. Petersburg: VIR. 344 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)

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