干旱区生态环境知识资源中心(Arid): Life history strategies drive size-dependent biomass allocation patterns of dryland ephemerals and shrubs

Arid

DOI	10.1002/ecs2.2709
	Life history strategies drive size-dependent biomass allocation patterns of dryland ephemerals and shrubs
	Cheng, Renfei 1; Ran, Jinzhi 1; Huang, Heng 2; Dong, Longwei 1; Sun, Yuan 1; Ji, Mingfei 1; Hu, Weigang 1; Yao, Shuran 1; Lu, Jingli 1; Gong, Haiyang 1; Xie, Shubin 1; Du, Qiajun 1; Hou, Qingqing 1; Niklas, Karl J.3; Deng, Jianming 1
通讯作者	Deng, Jianming
来源期刊	ECOSPHERE
ISSN	2150-8925
出版年	2019
卷号	10 期号:4
英文摘要	Plant biomass allocation patterns are important to understanding and predicting ecosystem carbon cycles and other important ecological processes. Consequently, many attempts have been made to study these patterns. However, most studies focus on data from species in temperate forests to the neglect of data from desert species adapted to arid conditions. We hypothesize that different life history strategies drive or at least participate in different plant biomass allocation patterns, as, for example, the life history differences between desert ephemeral and shrub species. We tested this hypothesis using field data gathered directly from the entire desert vegetation in Northwestern China. When the data from each of the two species groups are pooled, ephemeral and shrub species manifest different scaling relationships between above- and belowground biomass, unlike the isometric scaling relationships typically reported for forest tree species. The observed scaling relationships are sensitive to water stress and temperature gradients. The scaling exponents numerically decrease with increasing drought stress, and relatively more biomass is allocated to shoot growth in ephemeral species (presumably to rapidly complete their life history). In the case of shrubs, the numerical value of the scaling exponent is insensitive to rainfall, presumably because these species allocate more biomass to root growth to access belowground water. However, the scaling exponent is significantly sensitive to temperature, which also regulates root growth. Moreover, for the two species groups, root-shoot ratios are jointly regulated by precipitation and temperature. The different biomass allocation patterns appear to result from different life histories that maximize either competition among neighboring plants, or escaping damage from drought and low temperatures. These findings show how overall body size and life histories jointly regulate biomass allocation patterns under different extreme conditions and provide insights into estimating the dry carbon content in dryland ecosystems.
英文关键词	biomass allocation climate factors desert shrubs ephemeral plants surviving strategies
类型	Article
语种	英语
国家	Peoples R China ; USA
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000472716600049
WOS关键词	FINE-ROOT BIOMASS ; ALLOMETRIC CONSTRAINTS ; GLOBAL PATTERNS ; PLANTS ; DENSITY ; CHINA ; TEMPERATURE ; COMPETITION ; RESPONSES ; DROUGHT
WOS类目	Ecology
WOS研究方向	Environmental Sciences & Ecology
来源机构	兰州大学 ; University of California, Berkeley
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/215304
作者单位	1.Lanzhou Univ, Sch Life Sci, State Key Lab Grassland Agroecosyst, Lanzhou 730000, Gansu, Peoples R China; 2.Univ Calif Berkeley, Dept Environm Sci Policy & Management, Berkeley, CA 94720 USA; 3.Cornell Univ, Sch Integrat Plant Sci, Plant Biol Sect, Ithaca, NY 14853 USA
推荐引用方式 GB/T 7714	Cheng, Renfei,Ran, Jinzhi,Huang, Heng,et al. Life history strategies drive size-dependent biomass allocation patterns of dryland ephemerals and shrubs[J]. 兰州大学, University of California, Berkeley,2019,10(4).
APA	Cheng, Renfei.,Ran, Jinzhi.,Huang, Heng.,Dong, Longwei.,Sun, Yuan.,...&Deng, Jianming.(2019).Life history strategies drive size-dependent biomass allocation patterns of dryland ephemerals and shrubs.ECOSPHERE,10(4).
MLA	Cheng, Renfei,et al."Life history strategies drive size-dependent biomass allocation patterns of dryland ephemerals and shrubs".ECOSPHERE 10.4(2019).