Full text of article: Russian language.

Abstract:
The results of remote sensing monitoring of tree density in Subpolar Ural are presented per period of 18 years (1988-2006). The SMA-method of winter images was a basis for calculation of changes. The forest density was more stable in plain part of area. The main natural trends of forest density were related with increasing of crown density in ecoton zone with rare Larix is near 1-2% per year on gently sloping mountains slopes.

Key words:
satellite monitoring, optical spectral diapason, forest crown, Subpolar Ural

References:

1. Sergeev, V.V. The analysis and processing of images received in observation Earth surface from space / V.V. Ser­ge­ev // Computer Optics. – 2006. – N 29. – P. 41-57. – (in Russian).
2. Karlsen, S.R. Method using indicator plants to map local climatic variation in the Kangerlussuaq/Scoresby Sund area, East Greenland / S.R. Karlsen, A.A. Elvebakk // Journal of Biogeography. – 2003. – N 30. – P. 1469-1491.
3. Shutova, E. Growing seasons of Nordic mountain birch in northernmost Europe as indicated by long-term field studies and analyses of satellite images / E. Shutova // Int. J. Biometeorol. – 2006. – N 51. – P. 155-166.
4. Karlsen, S.R. Satellite-based mapping of the growing season and bioclimatic zones in Fennoscandia / S.R. Karlsen, A. Elvebakk, K.A. Hogda, B. Johansen // Global Ecology and Biogeography. – 2006. – N 15. – P. 416-430.
5. Shijatov, S.G. Spatial-Temporal dynamic of forest-tundra ecotones on Polar Ural / S.G. Shijatov, M.M. Terentjev, V.V. Phomin // Journal of Ecology. – 2005. – N 2. – P. 83-90. – (in Russian).
6. Shijatov, S.G. The tree and shrub vegetation dynamic in mountains part of Polar Ural under climatic effects / S.G. Shijatov // Yekaterinburg: UrD RAS, 2009. – 216 p. – (in Russian).
7. Ojdupa, O.Ch. The long-term changes of summer temperature and radial growth of larch on high forest border of Altai-Sajan Mounties area / O.Ch. Ojdupa, E.А. Vaga­nov, M.М. Naurzbaev // Journal  of Dendrology. – 2004. – N 6. – P. 14-24. – (in Russian).
8. Alekseenko, N.А. The winter topographic maps / N.А. Alek­seenko, T.G. Svatkova // Bulletin of Moscow st. Un-v. Series. 5., Geography. – 2008. – N 3. – P. 8-11. – (in Russian).
9. The forestry and forest resources of Komi Republic. – Moscow: “Dizain. Informatia. Kartographya” Publisher, 2000. – 260 p. – (in Russian).
10. The Biodiversity of aquatic and terrestrial ecosystem of Kozim river basin. – Syktyvkar, 2010. – P. 128-136. – (in Russian).
11. Nepomilueva, N.I. The trees vegetation form of mountains plains of Subpolar Ural / N.I. Nepomilueva, V.V. Pachuchii, G.А. Simonov // Geography and natural resources. – 1986. – N 4. – P. 73. – (in Russian).
12. Teillet, P.M. On the slope-aspect correction of multispectral scanner data / P.M. Teillet, B. Guindon, D.G. Goodeonugh // Can. J. Remote Sens. – 1982. – Vol. 8. – P. 84-106.
13. Nichol, J. Empirical correction of low Sun angle images in steeply sloping terrain: a slope-matching technique / J. Nichol, Law Kin Hang, Wong Man Sing // International Journal of Remote Sensing. – 2006. – Vol. 27, N 3. – P. 629-635.
14. Twele, A. The effect of stratified topographic correction on land cover classification in tropical mountainous regions / A. Twele, M. Kappas, J. Lauer // ISPRS Commission VII Mid-term Symposium "Remote Sensing: From Pixels to Processes", Enschede, the Netherlands, 2006. – P. 8-11.
15. Civco, D.L. Topographic Normalization of Landsat Thematic Mapper Digital Imagery / D.L. Civco // Photogrammetric Engineering and Remote Sensing. – 1989. – Vol. 55(9). – P. 1303-1309.
16. Law, K.H. Topographic correction for differential illumination effects on ikonos satellite imagery / K.H. Law, J. Nichol. ? URL: http://www.isprs.org/istanbul2004/comm3/papers/347.pdf.
17. Colby, J.D. Topographic normalization in rugged terrain / J.D. Colby // Photogrammetric Engineering and Remote Sensing. – 1991. – Vol. 57. – P. 531-537.
18. Elsakov, V.V. Mapping of vegetation cover of Kozim river basin (Subpolar Ural) with remote sensing data / V.V. Elsakov, I.О. Marushak, V.M. Schyanov // Modern problems of remote sensing methods of Earth from Space. – 2009. – Vol. 6, part. 2. – P. 360-363. – (in Russian).
19. Bartalev, S.А. The satellite images for estimation of carbon sink in forest ecosystems under cutting effects / S.А. Bartalev, T.С. Chpvratovich, V.V. Elsakov // Modern problems of remote sensing methods of Earth from Space. – 2009. – Vol. 6, part. 2. – P. 343-352. – (in Russian).
20. Mounties forests. – Мoscow: The Forestry industry, 1979. – 200 p. – (in Russian).
21. Egorov, V.А. The Monitoring of vegetation cover fire damages with satellite data / V.А. Egorov, S.А. Bartalev, E.А. Lupjan, I.А. Uvarov // Proceedings of the university. Geodesy and aero photography. – 2006. – Vol. 2. – P. 98-109. – (in Russian).

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