干旱区生态环境知识资源中心(Arid): Microbial Biomass, Carbon Stocks, and CO2 Emission in Soils of Franz Josef Land: High-Arctic Tundra or Polar Deserts?

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DOI	10.1134/S1064229320040110
	Microbial Biomass, Carbon Stocks, and CO2 Emission in Soils of Franz Josef Land: High-Arctic Tundra or Polar Deserts?
	Nikitin, D. A.1; Lysak, L. V.2; Mergelov, N. S.3; Dolgikh, A. V.3; Zazovskaya, E. P.3; Goryachkin, S. V.3
通讯作者	Nikitin, D. A.
来源期刊	EURASIAN SOIL SCIENCE
ISSN	1064-2293
EISSN	1556-195X
出版年	2020
卷号	53 期号:4 页码:467-484
英文摘要	The biomass of prokaryotes and fungi, organic carbon stocks, and CO2 emission were studied in the Cryosols and Leptosols of Franz Josef Land. The highest carbon stocks were found in the Eutric Leptosols (Loamic, Humic) formed in the wind-sheltered areas (23.2 kg C/m(2) in the upper 50 cm), as well as in Turbic Cryosols (Humic) that contained organic matter buried by cryoturbation (13.7-20.7 kg C/m(2)). The number of prokaryotes varied between 0.14 and 2.10 billion cells/g of soil, and the maximum values of their biomass were found in the litter. The fungal biomass varied from tens to hundreds of mg/g of soil depending on the type of soil and biotope. The share of spores was more than a half of the total fungal biomass in 80% of cases. Spores and mycelium were mainly represented by small forms with a diameter of up to 2-3 microns. The length of the fungal mycelium ranged from 4 to 272 m/g of soil. The maximum development of fungi was observed in the lichen biocrusts and moss litters. The fungal biomass decreased exponentially with the depth of horizons, and at the same time the share of prokaryotes in microbial biomass increased by several times. The share of microbial carbon in the total organic carbon was higher in soils of barrens (the most extreme habitats among the studied ones) as compared with the soils of local tundra areas (12.7 versus 2.5%, respectively). The levels of CO2 emission from the surface of undisturbed soils varied in the range of 1.6-91.7 mg C-CO2/m(2) per hour and differed by tens of times between barrens and tundra areas. The studied soils are close to the soils of the Arctic tundra when compared by their carbon stocks and CO2 emission values; however, their microbial biomass values and their distribution are close to the soils of Antarctica and hot deserts.
英文关键词	High Arctic carbon cycle prokaryotes fungi functioning extreme environment cryogenic processes
类型	Article
语种	英语
国家	Russia
收录类别	SCI-E
WOS记录号	WOS:000531027700008
WOS关键词	BACTERIAL COMMUNITIES ; FUNGI ; DIVERSITY ; RATIOS ; HOT
WOS类目	Soil Science
WOS研究方向	Agriculture
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/318909
作者单位	1.Dokuchaev Soil Sci Inst, Moscow 119017, Russia; 2.Lomonosov Moscow State Univ, Moscow 119991, Russia; 3.Russian Acad Sci, Inst Geog, Moscow 119017, Russia
推荐引用方式 GB/T 7714	Nikitin, D. A.,Lysak, L. V.,Mergelov, N. S.,et al. Microbial Biomass, Carbon Stocks, and CO2 Emission in Soils of Franz Josef Land: High-Arctic Tundra or Polar Deserts?[J],2020,53(4):467-484.
APA	Nikitin, D. A.,Lysak, L. V.,Mergelov, N. S.,Dolgikh, A. V.,Zazovskaya, E. P.,&Goryachkin, S. V..(2020).Microbial Biomass, Carbon Stocks, and CO2 Emission in Soils of Franz Josef Land: High-Arctic Tundra or Polar Deserts?.EURASIAN SOIL SCIENCE,53(4),467-484.
MLA	Nikitin, D. A.,et al."Microbial Biomass, Carbon Stocks, and CO2 Emission in Soils of Franz Josef Land: High-Arctic Tundra or Polar Deserts?".EURASIAN SOIL SCIENCE 53.4(2020):467-484.