干旱区生态环境知识资源中心(Arid): Drought Enhances the Role of Competition in Mediating the Relationship between Tree Growth and Climate in Semi-Arid Areas of Northwest China

Arid

DOI	10.3390/f10090804
	Drought Enhances the Role of Competition in Mediating the Relationship between Tree Growth and Climate in Semi-Arid Areas of Northwest China
	Lu, Kanglong 1,2; Chen, Ning 1,2; Zhang, Cankun 1,2; Dong, Xiaoxue 1,2; Zhao, Changming 1,2
通讯作者	Zhao, Changming
来源期刊	FORESTS
EISSN	1999-4907
出版年	2019
卷号	10 期号:9
英文摘要	Climate variability can exert a powerful impact on biotic competition, but past studies have focused largely on short-lived species, with a lack of attention to long-lived species such as trees. Therefore, there is a need to evaluate how competition regulates the climate-growth relationship in mature trees. We sampled the dominant tree species, Picea wilsonii Mast., on Xinglong Mountain, China, and studied the above issues by analyzing the relationship between tree radial growth, precipitation, and competition. In relatively wet years (precipitation > average), there was no significant difference in climate sensitivity between different competition classes. However, trees suffering from highly competitive stress were more sensitive to climate variability in all years, and particularly in the subset of years that was relatively drought (precipitation < average). These results suggest that competition enhances its ability to regulate tree growth response to climate variability in adverse weather conditions. Competition for resources between trees was asymmetrical, and an increase in height could give trees a disproportionate benefit. Thus, at trunk-level, both basal area incremental growth and intrinsic water-use efficiency of trees subjected to low competitive stress were significantly higher than trees that are subjected to highly competitive stress. Although the intrinsic water-use efficiency of trees under highly competitive stress increased more rapidly as the drought level increases, this did not change the fact that the radial growth of them declined more. Our research is valuable for the development of individual-tree growth models and advances our understanding for forest management under global climate change.
英文关键词	competition climate-growth relationship tree rings resources utilization allometry
类型	Article
语种	英语
国家	Peoples R China
开放获取类型	Green Submitted, gold
收录类别	SCI-E
WOS记录号	WOS:000487978700010
WOS关键词	CARBON-ISOTOPE DISCRIMINATION ; STRESS-GRADIENT HYPOTHESIS ; WATER-USE EFFICIENCY ; POSITIVE INTERACTIONS ; SIZE INEQUALITY ; RING GROWTH ; FACILITATION ; RESPONSES ; MORTALITY ; HEIGHT
WOS类目	Forestry
WOS研究方向	Forestry
来源机构	兰州大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/215706
作者单位	1.Lanzhou Univ, Sch Life Sci, State Key Lab Grassland Agroecosyst, Lanzhou 730000, Gansu, Peoples R China; 2.Lanzhou Univ, Yuzhong Mt Ecosyst Field Observat & Res Stn, 222 Tianshui South Rd, Lanzhou 730000, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Lu, Kanglong,Chen, Ning,Zhang, Cankun,et al. Drought Enhances the Role of Competition in Mediating the Relationship between Tree Growth and Climate in Semi-Arid Areas of Northwest China[J]. 兰州大学,2019,10(9).
APA	Lu, Kanglong,Chen, Ning,Zhang, Cankun,Dong, Xiaoxue,&Zhao, Changming.(2019).Drought Enhances the Role of Competition in Mediating the Relationship between Tree Growth and Climate in Semi-Arid Areas of Northwest China.FORESTS,10(9).
MLA	Lu, Kanglong,et al."Drought Enhances the Role of Competition in Mediating the Relationship between Tree Growth and Climate in Semi-Arid Areas of Northwest China".FORESTS 10.9(2019).