Relatives

The distribution area of Chinese hawthorn (Crataegus pinnatifida Bunge)

Object description Download GIS-layers

Authors:

The expert-botanist I.G. Chukhina
The GIS-expert T.A. Sinitsyna

Date of creation:

4.06.2004.

Scale:

1:20,000,000.

Exactness of map:

Map was created using data from herbarium specimens and maps of scale 1:25,000,000-1:85,000,000.

The projection:

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

Basic contents:

Map is a vector file consisting of polygons and points. Locations of species are represented by points; areas of possible distribution of species are represented by polygons.

Accuracy of classifier:

Points represent locations of the species referenced in published sources and locations from which herbarium specimens were taken. Polygons are based on generalized information from published sources and herbarium specimens.

Method of map production:

The following sources were used to determine the distribution area: N.I. Vavilov Institute (1992), Sokolov et al. (1980), Koropachinskiy (2002), and Kharkevich (1996). The northern and northeastern borders of the distribution area were determined using Kharkevich (1996) and Sokolov et al. (1980). The three most western locations of the species were not included in the final polygon because supplementary field investigations are needed to confirm distribution of the species in this territory. The southern border of the distribution area passes through the national border of the former USSR.

References.

Institute of biology and soil science FEP RAS, Vladivostok, Russia.
Kharkevich S.S., ed. 1996. Vascular plants of the Soviet Far East. V. 8. Leningrad: Nauka, pp. 148. (in Russian).
Koropachinskiy, I.Yu., Vstovskaya, T.N. 2002. Woody plants of the Asian part of Russia. Novosibirsk: Publishing House of SB RAS, Branch "Geo", pp.319-321 (in Russian).
N.I. Vavilov All-Russian Institute of Plant Industry [WIR], St. Petersburg, Russia.
N.I. Vavilov Institute, Herbarium Department, 1992. Information retrieval system: wild-growing relatives of cultural plants of Russia. STC Informregister 0229905883, St. Petersburg, Russia.
Sokolov, S.I., Svjaseva, O.A., Kubli, V.A. 1980. Areas of distribution of trees and shrubs in the USSR. Vol. 2. Leningrad: Nauka, map # 67E.

Right and copyright:

Copyright on this map and its description belongs to its authors;
copyright on the picture belongs to Egor Chukhin.