Functional correlations between specific leaf area and specific root length along a regional environmental gradient in Inner Mongolia grasslands

doi:10.1111/1365-2435.12569

	Functional correlations between specific leaf area and specific root length along a regional environmental gradient in Inner Mongolia grasslands
	Cheng, Junhui 1; Chu, Pengfei ; Chen, Dima ; Bai, Yongfei
	2016
发表期刊	FUNCTIONAL ECOLOGY
ISSN	0269-8463
卷号	30 期号:6 页码:985-997
摘要	1. Among above-and below-ground traits, specific leaf area (SLA, cm(2) g(-1)) and specific root length (SRL, m g(-1)) are the two key traits reflecting species resource acquisition strategies. However, patterns of variation in SLA and SRL have rarely been examined simultaneously across evolutionary history and environmental gradients, and the SLA-SRL relationship is still controversial on several grounds. 2. We examined the inter-and intraspecific variations in SLA and SRL of different root branching orders and the SLA-SRL relationship across 55 species and 21 plant communities of four vegetation types along a 2000-km transect in the Inner Mongolia grassland. 3. With increasing root branching order, the interspecific variation in SRL increased, but the intraspecific variation in SRL decreased considerably, and the form of SLA-SRL relationship shifted from positive to negative. This indicates that acquisition of soil resources (e.g. water and nutrients) is a fundamental strategy for plant investment to root length. When inter-and intraspecific variations in SLA and SRLs were partitioned into alpha (within-community) and beta (among-community) components, the alpha component exhibited substantially greater inter-and intraspecific variations than the beta component. 4. Across the transect, the evolutionarily late diverged species in phylogenetic tree evolved towards low SLA and SRL-1 (SRL for first-order roots) and tended to distribute in resource-poor conditions along the environmental gradient. The early diverged species, in contrast, had high SLA and SRL-1 and mostly distributed in resource-rich conditions. 5. Our findings suggest that patterns of inter-and intraspecific variations in SLA and SRL of different root branching orders and the form of SLA-SRL relationship could be well explained by within-and among-community filtering processes and species divergence time. Coordination and trade-offs between leaves and roots do not mutually exclude but operate simultaneously at different scales and among different root branching orders in arid and semi-arid grasslands.
关键词	divergence time environmental gradient evolutionary history root branching order spatial scale specific leaf area specific root length trait-gradient analysis
学科领域	Ecology
DOI	10.1111/1365-2435.12569
收录类别	SCI
语种	英语
WOS关键词	POTENTIAL GROWTH-RATE ; COMMUNITY ECOLOGY ; WITHIN-COMMUNITY ; ARID ECOSYSTEMS ; RAIN-FOREST ; FINE ROOTS ; LIFE-SPAN ; TRAITS ; PLANT ; TREE
WOS研究方向	Science Citation Index Expanded (SCI-EXPANDED)
WOS记录号	WOS:000379979800016
出版者	WILEY-BLACKWELL
文献子类	Article
出版地	HOBOKEN
EISSN	1365-2435
资助机构	National Key Technology RD ProgramNational Key Technology R&D Program [2012BAD16B0304] ; Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [31320103916, 31030013] ; Strategic Priority Research Program of the Chinese Academy of SciencesChinese Academy of Sciences [XDA05050400]
作者邮箱	yfbai@ibcas.ac.cn
作品OA属性	Bronze
引用统计	被引频次：66[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ibcas.ac.cn/handle/2S10CLM1/25173
专题	植被与环境变化国家重点实验室
作者单位	1.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, 20 Nanxincun, Beijing 100093, Peoples R China 2.Chinese Acad Sci, Grad Univ, 19A Yuquan Rd, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Cheng, Junhui,Chu, Pengfei,Chen, Dima,et al. Functional correlations between specific leaf area and specific root length along a regional environmental gradient in Inner Mongolia grasslands[J]. FUNCTIONAL ECOLOGY,2016,30(6):985-997.
APA	Cheng, Junhui,Chu, Pengfei,Chen, Dima,&Bai, Yongfei.(2016).Functional correlations between specific leaf area and specific root length along a regional environmental gradient in Inner Mongolia grasslands.FUNCTIONAL ECOLOGY,30(6),985-997.
MLA	Cheng, Junhui,et al."Functional correlations between specific leaf area and specific root length along a regional environmental gradient in Inner Mongolia grasslands".FUNCTIONAL ECOLOGY 30.6(2016):985-997.

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