干旱区生态环境知识资源中心(Arid): Climate-Driven Holocene Migration of Forest-Steppe Ecotone in the Tien Mountains

Arid

DOI	10.3390/f11111139
	Climate-Driven Holocene Migration of Forest-Steppe Ecotone in the Tien Mountains
	Cheng, Ying; Liu, Hongyan; Wang, Hongya; Hao, Qian; Han, Yue; Duan, Keqin; Dong, Zhibao
通讯作者	Liu, HY
来源期刊	FORESTS
EISSN	1999-4907
出版年	2020
卷号	11 期号:11
英文摘要	Climate change poses a considerable threat to the forest-steppe ecotone in arid mountain areas. However, it remains unclear how the forest-steppe ecotone responds to climate change due to the limitation of the traditional pollen assemblages, which greatly limits the understanding of the history of the forest-steppe ecotone. Here, we examined the Tien Mountains, the largest mountain system in the world's arid regions, as a case study to explore the migration of the forest-steppe ecotone using the pollen taxa diversity, by combining modern vegetation surveys, surface pollen and two fossil pollen sequences-in the mid-elevation forest belt (Sayram Lake) and in the low-elevation desert belt (Aibi Lake). We found that the forest-steppe migration followed Holocene climate change. Specifically, the forest belt where Picea schrenkiana Fisch. & C.A.Mey. dominates has a very low pollen taxa diversity, characterized by high richness and low evenness, which plays a key role in mountainous diversity. By detecting the diversity change of the deposition sites, we found that in coping with the warm and wet middle Holocene, the forest belt expanded and widened as the observed diversities around the two lakes were very low, thus the forest-steppe ecotone moved downward accordingly. During the early and late Holocene, the forest belt and the forest-steppe ecotone moved upward under a warm and dry climate, and downward under a cold and wet climate, as there was a reduced forest belt effect on, or contribution to, the sites, and the observed diversities were high. Moisture loss may pose the greatest threat to the narrow forest-steppe ecotone, considering the climatic niche space and the limited living space for humidity-sensitive taxa. This study highlights that temperature and moisture co-influence the forest belt change, which further determines the position migration of the forest-steppe ecotone.
英文关键词	pollen analysis forest belt forest-steppe ecotone position migration moisture change
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000593176700001
WOS关键词	ARID CENTRAL-ASIA ; QUANTITATIVE RECONSTRUCTION ; VEGETATION ; POLLEN ; BIODIVERSITY ; EVOLUTION ; MOISTURE ; LAKE ; DIVERSITY ; CHINA
WOS类目	Forestry
WOS研究方向	Forestry
来源机构	北京大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/327689
作者单位	[Cheng, Ying; Duan, Keqin; Dong, Zhibao] Shaanxi Normal Univ, Sch Geog & Tourism, Xian 710119, Peoples R China; [Liu, Hongyan; Wang, Hongya; Han, Yue] Peking Univ, Coll Urban & Environm Sci, Beijing 100871, Peoples R China; [Liu, Hongyan; Wang, Hongya; Han, Yue] Peking Univ, MOE Lab Earth Surface, Beijing 100871, Peoples R China; [Hao, Qian] Tianjin Univ, Sch Earth Syst Sci, Inst Surface Earth Syst Sci, Tianjin 300072, Peoples R China
推荐引用方式 GB/T 7714	Cheng, Ying,Liu, Hongyan,Wang, Hongya,et al. Climate-Driven Holocene Migration of Forest-Steppe Ecotone in the Tien Mountains[J]. 北京大学,2020,11(11).
APA	Cheng, Ying.,Liu, Hongyan.,Wang, Hongya.,Hao, Qian.,Han, Yue.,...&Dong, Zhibao.(2020).Climate-Driven Holocene Migration of Forest-Steppe Ecotone in the Tien Mountains.FORESTS,11(11).
MLA	Cheng, Ying,et al."Climate-Driven Holocene Migration of Forest-Steppe Ecotone in the Tien Mountains".FORESTS 11.11(2020).