Early Postfire Vegetation Dynamics of Shrub-steppe Communities (On the example of Burtinskaya Shrub-steppe of Orenburg Nature Reserve)
The intensification of fire regime in the shrub-steppe determined the need for research aimed at identifying the regularities of the effect exerted by wildfires on shrub-steppe ecosystems and one of their most dynamic components referred to as plant cover. A present study was carried out on the territory of Burtinskaya Steppe of the Orenburg Reserve and in its protected area in 2015–2016, following the fire that occurred in August 2014. It was found out that in the first year following a fire event, the total plant cover of steppe ecosystems affected by a wildfire is almost halved. The plant cover dominated by bunchgrasses, especially of the genus Stipa, significantly decreases, and the abundance and diversity of ephemeroids increase. The floristic alteration manifesting itself in the form of an invasive role of certain species (most often ephemeroids and biennials) during one vegetative stage is endemic to the areas exposed to overgrazing in the past. The outburning of plant cover can bring about a change in dominant and codominant plant species within a shrub-steppe assemblage.
 Popov, A.V. (2004). Steppe fires and biodiversity conservation in the protected areas of the Northern Caspian region. Proceedings of the international conference dedicated to the 15th anniversary of the Orenburg State Reserve, pp. 152–153.
 Yunusbayev, U.B., Abdulina, K.Kh., Yanturin, S.I. (2007). The role of fires in the formation of aboveground phytomass of steppe grasslands of the Trans-Urals of the Republic of Bashkortostan. Agrarian Russia, no. 5, pp. 24–25.
 Sambuu, A.D., Khomushku, N.G. (2015). The problem of forest and steppe fires on the territory of the Republic of Tyva. Modern problems of science and education, no. 2-2. Retrieved from: http://science-education.ru/ru/article/view?id=21607 (access date: 02/26/2019).
 Sambuu, A.D., Dapylday, A.B. (2016). Steppe vegetation fires on the territory of Tuva and their consequences. Proceedings of the 1st International Scientific and Practical Conference ``Preservation of the diversity of flora of Tuva and cross-border regions of Central Asia: history, modernity, prospects''. Tuva, pp. 135–141.
 Tkachuk, T.E. (2015). Dynamics of steppe fires in the south of Dauria in the first decade of the 21st century. Scientific notes of Trans-Baikal State University. Series: Natural Sciences, no. 1(60), pp. 72–79.
 Tkachuk, T.E., Denisova, Yu.Yu. (2015). ``The Effect of Experimental Burning on the Structure of Steppe Ecosystems in the South of Dauria'', Proceedings of the VII International Symposium ``Steppes of Northern Eurasia'', pp. 847–849.
 Drogobych, N.E. (2000). Post-pyrogenic dynamics of the elevated phytomass of the steppe ecosystems of the Black Sea region. Materials of the II InternationalSymposium ``Steppes of Northern Eurasia: a strategy for the conservation of natural diversity and steppe environmental management in the 21st century'', pp. 148–150.
 Lysenko, G.N. (2006). Stability of steppe phytocenostructures: thermodynamic aspect. Materials of the IV International Symposium ``Steppes of Northern Eurasia'', pp. 449–451.
 Ruprecht, E., Enyedi, M.Z., Szabo, A., Fenesi, A. (2016). Biomass removal by clipping and raking vs burning for the restoration of abandoned Stipa-dominated European steppe-like grassland. Applied Vegetation Science, vol. 19, pp. 78–88.
 Kertész, M., Aszalós, R., Lengyel, A., Ónodi, G. (2017). Synergistic effects of the components of global change: Increased vegetation dynamics in open, forest-steppe grasslands driven by wildfires and year-to-year precipitation differences. PLoS ONE, vol. 12. Retrieved from: http://journals.plos.org/plosone/article?id=10.1371/ journal.pone.0188260,2017
 Rostagno, C.M., Guillermo, D.E., del Valle He´ctor, F. (2006). Postfire Vegetation Dynamics in Three Rangelands of Northeastern Patagonia, Argentina. Rangeland Ecol. Manage, vol. 59, pp. 163–170.
 Bates, J.D., Rhodes, E., Davies, K., Sharp, R. (2009). Grazing after fire in the sagebrush steppe. Rangeland Ecology and Management, vol. 62, pp. 98–110.
 Twidwell, D., Rogers, W.E., McMahon, E.A., Thomas, B.R., Kreuter, U.P., Blankenship, T.L. (2012). Prescribed Extreme Fire Effects on Richness and Invasion in Coastal Prairie. Invasive Plant Science and Management, vol. 5, pp. 330–340.
 Winter, S.L., Allred, B.W., Hickman, K.R., Fuhlendorf, S.D. (2015). Tallgrass prairie vegetation response to spring fires and bison grazing. The Southwestern Naturalist, vol. 60(1), pp. 30–35.
 Hanna, S.K., Fulgham Hanna, K.O. (2015). Post-fire vegetation dynamics of a sagebrush steppe community change significantly over time. California Agriculture, vol. 69(1), pp. 36–42.
 Davies, K.W., Gearhart, A., Boyd, Ch.S., Bates, J.D. (2017). Fall and spring grazing influence fire ignitability and initial spread in shrub steppe communities. International Journal of Wildland Fire, vol. 26, pp. 485–490.
 Gullap, M.K., Erkovan, S., Erkovan, H.I., Koc, A. (2018). Effects of Fire on Litter, Forage Dry Matter Production, and Forage Quality in Steppe Vegetation of Eastern Anatolia, Turkey. Journal of Agricultural Science and Technology, vol. 20 (1), pp. 61–70.
 Mata-Gonzáleza, R., ReedDustin, C.M., Rodhouse Th.J. (2018). Contrasting Effects of Long-Term Fire on Sagebrush Steppe Shrubs Mediated by Topography and Plant Community. Rangeland Ecology & Management, vol. 71(3), pp. 336–344.
 Safronova, I.N., Kalmykova, O.G. (2012). Issues of zonality and the role of nature reserves in their solution. News of the Samara Scientific Center of the Russian Academy of Sciences, no. 1(6), P. 1638–
1641.  The Red Book of Orenburg Oblast: soils. (2001), pp. 2–295.
 Cherepanov, S.K. (1995). Vascular plants of Russia and cross-border states (within the former USSR), pp. 3–990.