干旱区生态环境知识资源中心(Arid): Post-pyrogenic changes in vegetation cover and biological soil crust in steppe ecosystems

Arid

DOI	10.15421/021797
	Post-pyrogenic changes in vegetation cover and biological soil crust in steppe ecosystems
	Shcherbyna, V. V.; Maltseva, I. A.; Maltsev, Y. I.; Solonenko, A. N.
通讯作者	Shcherbyna, VV
来源期刊	REGULATORY MECHANISMS IN BIOSYSTEMS
ISSN	2519-8521
EISSN	2520-2588
出版年	2017
卷号	8 期号:4 页码:633-638
英文摘要	The study of the processes of restoration of species richness and productivity of steppe ecosystems after fires is an urgent problem that affects not only the conservation of biodiversity but also the maintenance of pasture resources. This article presents the results of a study of post-pyrogenic effects in steppe ecosystems, taking into account changes in the species composition of cyanoprokaryotes and algae that are art of the biological soil crust, which performs ecologically important functions in xerophytic ecosystems. The investigations were carried out in virgin and post-pyrogenic steppe ecosystems of the "Troitsk Clough" reserve (Zaporizhia region, Ukraine). For three years, the dynamics of the projective cover and the height of the vegetation cover in virgin areas of herbs-fescue-feather-grass and fescue-feather-grass steppes was studied as well as within two ecosystems of post-pyrogenic development after fires that occurred in the spring and winter periods. We discovered that restoration of the herbs-fescue-feather-grass and fescue-feather-grass steppes after fires occurs at different rates. The cause of the slow restoration of vegetation cover can be its severe damage by fire at the beginning of the vegetation season and the development of erosion processes. The number of species of cyanoprokaryotes and algae in the biological soil crust of virgin and post-pyrogenic ecosystems is not significantly different. It varies from 35 to 49 species. The greatest diversity is noted for Cyanoprokaryota. Chlorophyta is in the second place. Among the dominants, the filamentous forms of Cyanoprokaryota prevail. Nostoc edaphicum was noted as a nitrogen fixing representative. The similarity of the species lists of cyanoprokaryotes and algae of post-pyrogenic and virgin ecosystems, according to the calculated Jaccard coefficient, varies from 49.1% to 55.3%. This indicates a strong specificity of the composition of cyanoprokaryotes and algae in post-pyrogenic biological soil crusts. Changes in their composition reflect different stages of post-pyrogenic succession. In the first year after a fire, there is a slight increase in species richness, which is a consequence of the favorable effect of increasing the amount of mineral substances in the soil after the organic matter has burned out. The "pioneer" group includes: Phormidium autumnale, Ph. dimorphum, Ph. retzii, Ph. (Leptolyngbya) henningsii, Luticola mutica, Hantzschia amphioxys. Gradually this effect is leveled and the species richness of cyanoprokaryotes and algae is stabilized at a level peculiar for this type of ecosystem.
英文关键词	steppe fire algae cyanoprokaryotes projective cover biological soil crust post-pyrogenic succession
类型	Article
语种	英语
开放获取类型	DOAJ Gold
收录类别	ESCI
WOS记录号	WOS:000424421300026
WOS关键词	SHORTGRASS STEPPE ; PLANT COMMUNITY ; FIRE ; ALGAE ; IMPACTS ; DESERT ; MICROSTRUCTURE ; RESISTANCE ; EMERGENCE ; CARBON
WOS类目	Biology
WOS研究方向	Life Sciences & Biomedicine - Other Topics
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/332521
作者单位	[Shcherbyna, V. V.] Tavria State Agrotechnol Univ, B Khmelnytskyi Ave 18, UA-72310 Melitopol, Ukraine; [Maltseva, I. A.; Maltsev, Y. I.; Solonenko, A. N.] Melitopol Bohdan Khmelnytskyi State Pedag Univ, Hetmanska Str 20, UA-72312 Melitopol, Ukraine
推荐引用方式 GB/T 7714	Shcherbyna, V. V.,Maltseva, I. A.,Maltsev, Y. I.,et al. Post-pyrogenic changes in vegetation cover and biological soil crust in steppe ecosystems[J],2017,8(4):633-638.
APA	Shcherbyna, V. V.,Maltseva, I. A.,Maltsev, Y. I.,&Solonenko, A. N..(2017).Post-pyrogenic changes in vegetation cover and biological soil crust in steppe ecosystems.REGULATORY MECHANISMS IN BIOSYSTEMS,8(4),633-638.
MLA	Shcherbyna, V. V.,et al."Post-pyrogenic changes in vegetation cover and biological soil crust in steppe ecosystems".REGULATORY MECHANISMS IN BIOSYSTEMS 8.4(2017):633-638.