Fully exposed canopy tree and liana branches in a tropical forest differ in mechanical traits but are similar in hydraulic traits

doi:10.1093/treephys/tpz070

	Fully exposed canopy tree and liana branches in a tropical forest differ in mechanical traits but are similar in hydraulic traits
	Zhang, Lan 1; Chen, Yajun 2,3; Ma, Keping1 ; Bongers, Frans ; Sterck, Frank J.
	2019
发表期刊	TREE PHYSIOLOGY
ISSN	0829-318X
卷号	39 期号:10 页码:1713-1724
摘要	Large lianas and trees in the forest canopy are challenged by hydraulic and mechanical failures and need to balance hydraulic conductivity, hydraulic safety and mechanical safety. Our study integrates these functions in canopy branches to understand the performance of canopy trees and lianas, and their difference. We sampled and measured branches from 22 species at a canopy crane in the tropical forest at Xishuangbanna, SW China. We quantified the hydraulic conductivity from the xylem-specific hydraulic conductivity (K-S), hydraulic safety from the cavitation resistance (P-50) and mechanical safety from the modulus of rupture (MOR) to evaluate trade-offs and differences between lianas and trees. We also measured a number of anatomical features that may influence these three functional traits. Our results suggest the following: trade-offs between hydraulic conductivity, hydraulic safety and mechanical safety are weak or absent; liana branches better resist external mechanical forces (higher MOR) than tree branches; and liana and tree branches were similar in hydraulic performance (K-S and P-50). The anatomical features underlying K-S, P-50 and MOR may differ between lianas and trees. We conclude that canopy branches of lianas and trees diverged in mechanical design due to fundamental differences in wood formation, but converged in hydraulic design.
关键词	anatomy canopy hydraulic conductivity hydraulic safety mechanical safety trade-off
学科领域	Forestry
DOI	10.1093/treephys/tpz070
收录类别	SCI
语种	英语
WOS关键词	LIFE-HISTORY VARIATION ; CAVITATION RESISTANCE ; WATER-STRESS ; POISON OAK ; WOOD STRUCTURE ; WEAK TRADEOFF ; XYLEM SAFETY ; EFFICIENCY ; STEMS ; VULNERABILITY
WOS研究方向	Forestry
WOS记录号	WOS:000509482600006
出版者	OXFORD UNIV PRESS
文献子类	Article
出版地	OXFORD
EISSN	1758-4469
资助机构	Stichting Het Kronendak Canopy Grant [16-007] ; Youth Innovation Promotion Association [2016351] ; 'Light of West China' Program of CAS ; CAS 135 program [2017XTBG-T01, 2017XTBG-F01] ; Koninklijke Nederlandse Akademie van Wetenschappen Chinese Exchange Program [5305CDP20]
作者邮箱	chenyj@xtbg.org.cn
引用统计	被引频次：24[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/2S10CLM1/19860
专题	植被与环境变化国家重点实验室
作者单位	1.[Zhang, Lan; Bongers, Frans; Sterck, Frank J.] Wageningen Univ & Res Ctr, Forest Ecol & Forest Management Grp, POB 47, NL-6700 AA Wageningen, Netherlands 2.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, 20 Nanxincun, Beijing 100093, Peoples R China 3.Chinese Acad Sci, Xishuangbanna Trop Bot Garden, CAS Key Lab Trop Forest Ecol, Mengla 666303, Yunnan, Peoples R China 4.Chinese Acad Sci, Xishuangbanna Trop Bot Garden, Yuanjiang Savanna Ecosyst Res Stn, Yuanjiang 666303, Yunnan, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Lan,Chen, Yajun,Ma, Keping,et al. Fully exposed canopy tree and liana branches in a tropical forest differ in mechanical traits but are similar in hydraulic traits[J]. TREE PHYSIOLOGY,2019,39(10):1713-1724.
APA	Zhang, Lan,Chen, Yajun,Ma, Keping,Bongers, Frans,&Sterck, Frank J..(2019).Fully exposed canopy tree and liana branches in a tropical forest differ in mechanical traits but are similar in hydraulic traits.TREE PHYSIOLOGY,39(10),1713-1724.
MLA	Zhang, Lan,et al."Fully exposed canopy tree and liana branches in a tropical forest differ in mechanical traits but are similar in hydraulic traits".TREE PHYSIOLOGY 39.10(2019):1713-1724.

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