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

	Large-scale permafrost degradation as a primary factor in Larix sibirica forest dieback in the Khentii massif,northern Mongolia
	Juricka David; Novotna Jitka; Houska Jakub; Parilkova Jana; Hladky Jan; Pecina Vaclav; Cihlarova Hana; Burnog Marcela; Elbl Jakub; Rosicka Zdena; Brtnicky Martin; Kynicky Jindrich
来源期刊	Journal of Forestry Research
ISSN	1007-662X
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
收录类别	CSCD
WOS研究方向	Forestry
CSCD记录号	CSCD:6659549
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/336246
作者单位	Juricka David, Department of Geology and Pedology, Faculty of Forestry and Wood Technology, Mendel University in Brno;;Central European Institute of Technology, Brno University of Technology, ;;, Brno;;Brno, Czech Republic;;Czech Republic 613 00;;612 00.; Hladky Jan, Department of Geology and Pedology, Faculty of Forestry and Wood Technology, Mendel University in Brno;;Central European Institute of Technology, Brno University of Technology, ;;, Brno;;Brno, Czech Republic;;Czech Republic 613 00;;612 00.; Elbl Jakub, Department of Geology and Pedology, Faculty of Forestry and Wood Technology, Mendel University in Brno;;Central European Institute of Technology, Brno University of Technology, ;;, Brno;;Brno, Czech Republic;;Czech Republic 613 00;;612 00.; Brtnicky Martin, Department of Geology and Pedology, Faculty of Forestry and Wood Technology, Mendel University in Brno;;Central European Institute of Technology, Brno University of Technology, ;;, Brno;;Brno, Czech Republic;;Czech Republic 613 00;;612 00.; ...
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.