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	Root and leaf decomposition become decoupled overtime: implications for below- and above-ground relationships
	Ma C. E.; Xiong, Y. M.; Li, L.; Guo, D. L.
	2016
关键词	absorptive fine roots carbon cycling fine root decomposition litter chemistry plant functional traits plant-soil feedback whole-plant economics spectrum woody plants plant economics spectrum litter decomposition chinese temperate carbon fractions forest litter fine roots traits soil communities sensitivity
英文摘要	Studies elucidating patterns and mechanisms of decomposition are moving from a leaf-centred view towards a whole-plant perspective, in which root and leaf decomposition differs among species, yet this prediction has so far received mixed empirical support. Here, we examined the rates and temporal dynamics of decomposition of absorptive fine roots (the distal two root-branch orders) and leaf litter by measuring mass loss across 10 subtropical and temperate tree species, and CO2 efflux across 18 tree species in a 15-month laboratory incubation experiment. Eight of 12 initial chemical traits were positively correlated between roots and leaf litter (Pearson's r range of 048-082). However, mass loss and respiration rates between roots and leaf litter were correlated only in the first 3months, but unrelated in the subsequent 12months. This was due to root decomposition rates slowing down after the first 3months. The disparity in decomposition rates between roots and leaf litter was mainly due to the higher chemical recalcitrance of roots and suggests that roots and leaf litter need to be considered separately when evaluating their role in plant-soil feedbacks. A better understanding of whole-plant ecological strategies is needed to quantify the impact roots vs. leaves on detrital processes.
出处	Functional Ecology
卷	30
期	7
页	1239-1246
语种	英语
ISSN号	0269-8463
DOI标识	10.1111/1365-2435.12619
内容类型	SCI/SSCI论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/43139]
专题	地理科学与资源研究所_历年回溯文献
推荐引用方式 GB/T 7714	Ma C. E.,Xiong, Y. M.,Li, L.,et al. Root and leaf decomposition become decoupled overtime: implications for below- and above-ground relationships. 2016.

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