干旱区生态环境知识资源中心(Arid): Large-scale permafrost degradation as a primary factor in Larix sibirica forest dieback in the Khentii massif, northern Mongolia

Arid

DOI	10.1007/s11676-018-0866-4
	Large-scale permafrost degradation as a primary factor in Larix sibirica forest dieback in the Khentii massif, northern Mongolia
	Juricka, David 1,2; Novotna, Jitka 1; Houska, Jakub 1; Parilkova, Jana 3; Hladky, Jan 1,2; Pecina, Vaclav 1; Cihlarova, Hana 1; Burnog, Marcela 1; Elbl, Jakub 1,2; Rosicka, Zdena 1; Brtnicky, Martin 1,2; Kynicky, Jindrich 1,2
通讯作者	Juricka, David
来源期刊	JOURNAL OF FORESTRY RESEARCH
ISSN	1007-662X
EISSN	1993-0607
出版年	2020
卷号	31 期号:1 页码:197-208
英文摘要	The objective of this study is to investigate the potential causes of widespread Larix sibirica Ledeb. mortality observed in the Khentii massif of northern Mongolia. The ratio of deadwood to living trees in affected stands in the Goricho region, the southernmost study site situated close to the Gobi Desert, was as high as 3.6:1. Moisture fluctuations monitored over 2 years using electrical impedance spectrometry revealed that the Goricho study site had higher soil moisture levels than the two less affected sites Barun Bayan and Dzun Bayan. High soil moisture was recorded in an area characterized by highly skeletal soils, ones with more than 35% by volume of rock fragments, and comparatively shallow soil horizons, from valley to mountains. The layer of permafrost influencing hydrogeological processes is much deeper in the Goricho region compared to the undisturbed study sites. Redundancy analysis confirmed a significant number of dead L. sibirica on sites with developed soils. Live forest stands, however damaged, grow in this region on well-drained scree slopes or on rocky bastions. The mass mortality observed for L. sibirica may be directly linked to accelerated permafrost thaw in the area bordered by the Tuul and the Terelj Rivers. Our assumption is that L. sibirica root system necrosis occurred as a result of long-term waterlogging of developed soils with high spatial heterogeneity, normally able to absorb high quantities of groundwater. The areas unaffected were scree fields and rocky bastions characterized by adequate drainage. All of our findings support the primary stages of large-scale permafrost thaw, i.e., correlating increases in soil moisture with increasing permafrost active layer thickness.
英文关键词	Larix sibirica Mortality Permafrost thawing Waterlogging Mongolia
类型	Article
语种	英语
国家	Czech Republic
收录类别	SCI-E
WOS记录号	WOS:000511930900018
WOS关键词	BOREAL FORESTS ; CLIMATE ; VEGETATION ; WATER ; REGION ; TEMPERATURE ; STEPPE ; ROOT ; REGENERATION ; SPRUCE
WOS类目	Forestry
WOS研究方向	Forestry
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/314957
作者单位	1.Mendel Univ Brno, Fac Forestry & Wood Technol, Dept Geol & Pedol, Zemedelska 1, Brno 61300, Czech Republic; 2.Brno Univ Technol, Cent European Inst Technol, Purkynova 656-123, Brno 61200, Czech Republic; 3.Brno Univ Technol, Fac Civil Engn, Inst Water Struct, Zizkova 17, Brno 60200, Czech Republic
推荐引用方式 GB/T 7714	Juricka, David,Novotna, Jitka,Houska, Jakub,et al. Large-scale permafrost degradation as a primary factor in Larix sibirica forest dieback in the Khentii massif, northern Mongolia[J],2020,31(1):197-208.
APA	Juricka, David.,Novotna, Jitka.,Houska, Jakub.,Parilkova, Jana.,Hladky, Jan.,...&Kynicky, Jindrich.(2020).Large-scale permafrost degradation as a primary factor in Larix sibirica forest dieback in the Khentii massif, northern Mongolia.JOURNAL OF FORESTRY RESEARCH,31(1),197-208.
MLA	Juricka, David,et al."Large-scale permafrost degradation as a primary factor in Larix sibirica forest dieback in the Khentii massif, northern Mongolia".JOURNAL OF FORESTRY RESEARCH 31.1(2020):197-208.