Weeds
Area of distribution and weediness of Lycopsis orientalis L.
Object description Download GIS-layers
Authors:
Object specialist N.N. Luneva,GIS-specialist I.A. Budrevskaya.
Date of creation:
10.03.2005.Scale:
1:20 000 000.Accuracy of map:
Map was created based on information taken from open-published literature and maps of scale 1: 5 000 000 - 1: 100 000 000.Projection:
"Alber's Equal Area Conic for the 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. Area of the species is divided into zones of main distribution, moderate weediness and sporadic distribution. Zone of weediness was allocated according to criteria of occurrence (% of fields where this species is found) and abundance (Tanskii et al., 1998), i.e., where the occurrence of this species exceeded 50% with its field abundance (projective cover) more than 15%.Method of map production:
Published literature was reviewed, including Atlases, monographs and papers. Occurrence data were obtained from herbarium specimens, floras, monographs and papers. Data on L. orientalis distribution in Russia taken from Keller (1934) was used as a basis. Modern general distribution of the species was determined according to the following supplemental references: Ul.yanova (1981), Nikitin (1983). The zone of main distribution in the European part of the former USSR was confirmed and corrected according to the following sources: Maevskii (1954), Taliev (1935), Zozulin & Fedyaeva (1985), Zernov (2002), Geideman (1954). The species occurrence in the North Caucasus and Transcaucasia was confirmed according to the following sources: Maisuryan (1927), Galushko (1980), Vasil.chenko & Pidotti (1975). The zone of weediness was defined based on Nikitin (1983) and corrected according to data on weed occurrence, abundance, or harming ability taken from below references (except .Keys. and .Floras.), adjusted according to maps of steppe zone and arable lands. Sporadic distribution areas were determined according to herbarium data. 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:
Galushko, A.I. 1978. Flora of the Northern Caucasus. V. 1. Rostov-na-Donu: Rostov University. 316 p. (In Russian)Geideman T.S. 1954. Keys to plants of Moldavian SSR. Moscow-Leningrad: Nauka. 468 p. (In Russian)
Keller B.A., ed. 1934. Weed plants of the USSR. V. 3. Leningrad: AN SSSR. 448 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)
Maisuryan, N.A. 1927. Keys to main weed plants of Transcaucasia. Tiflis. 102 p. (In Russian)
Nikitin V.V. 1983. Weeds in the flora of the USSR. Leningrad: Nauka. 454 p. (In Russian)
Taliev V.I. 1935. Keys to higher plants of the European part of the USSSR. Moscow: State Publishing House of Kolkhoz and Sovkhoz Literature. 648 p. (In Russian)
Ulyanova T.N. 1983. Weed plants in wheat of the USSR. In: Korovina O.N., ed. Catalogue of VIR world collection. N. 320. Leningrad: VIR. 454 p. (In Russian)
Vasilchenko I.T., Pidotti O.A. 1975. Keys to weed plants of areas of irrigated agriculture. Leningrad: Kolos. 375 p. (In Russian)
Zernov A.S. 2002. Keys to vascular plants of the north of Russian Black Sea coast. Moscow: KMK. 284 p. (In Russian)
Zozulin, G.M. & V.V. Fedyaeva, eds. 1985. Flora of Lower Don. Keys. Part 2. Rostov: Rostov Universitety. 240 p. (In Russian)