Changes in the ground environment under the influence of fires in the territory of the State Natural Reserve «Olekminsky»

¹ Irkutsk national research technical University, Lermontova Str. 83, 664074, Irkutsk, Russia
² State natural reserve «Olekminsky», Logovaya Str. 31, 678100, Olyokminsk, Sakha Republic, Russia
³ Kaliningrad State Technical University, Sovietsky Prospect 1, 236022, Kaliningrad, Russia
⁴ Siberian Fire and Rescue Academy of the State Fire Service of the Emergencies Ministry of Russia, Severnaya Str. 1, 662972, Zheleznogorsk, Krasnoyarsk Krai, Russia

^* Corresponding author: tno73@yandex.ru

Abstract

This paper discusses the chronology and cause of forest fires on the territory of the State Reserve “Olekminsky”. Forest fires on the territory of the reserve are low-level, caused by dry thunderstorms. The overgrowth of burnt areas occurs at the expense of specific groups of pyrophyte plants. For 2-3 years after the fires, Camenerion angustifolium (L.) Scop., Corydalis sibirica (L.) Pers., Plantago canescens Adams, Crepis tectorum L. and others were found. In waterlogged areas, Tephroseris palustris (L.) Reichenb appear and subsequently do not occur, and mosses: Marshantia polymorpha L., Ceratodon purpureum (Hedw.) Brid. It was found that the restoration of ground cover is mainly due to species characteristic only for intermediate stages: Lichens - Baeomyces carneus, Dibaeis baeomyces and Trapeliopsis granulosa, as well as Arctous erythrocarpa (Small) M. Ivanova, Chamaenerion angustifolium (L.) Scop., Calamagrostis obtusata Trin, Сarex spp., cereals and green mosses. More than 40 species of lichens participate in the formation of the ground cover of the studied larch forests, mainly bushy species of Cladonia, Stereocaulon, Peltigera. Forest fires of a natural nature occurring on the territory of the reserve are the main limiting factor affecting bio-resources and theirrestoration.