NDLI: Influence of root structure on root survivorship: an analysis of 18 tree species using a minirhizotron method

Content Provider	Springer Nature Link
Author	Gu, Jiacun Yu, Shuiqiang Sun, Yue Wang, Zhengquan Guo, Dali
Copyright Year	2011
Abstract	Fine root survivorship is an important aspect of root ecology and is known to be influenced by a suite of covariates. However, the relative importance of each covariate on root survivorship is not clear. Here, we used minirhizotron-based data from 18 woody species to evaluate the relative strength of influence on root survivorship by root diameter, branch order, soil depth, and season of root birth, and to examine how the relationship between each covariate and root survivorship differed across species. We extracted hazard ratio estimates for 16 species from published studies that performed Cox proportional hazards regression analysis, and from our own unpublished data for two Chinese temperate tree species. The mean change in hazard ratio (CHR) and corresponding coefficient of variation for each factor were calculated across species. On average, root diameter and season of root birth had stronger effects on root survivorship than branch order and soil depth. However, the effects of season varied with species and were stronger in temperate forests, whereas the influence of diameter and order were relatively consistent across species. These results suggest that root structures such as diameter and branch order should be carefully considered in root classification and sampling, and adding season of birth (particularly in temperate forests) as a covariate in root survivorship analysis should further enhance our ability in achieving a better understanding of root demography and more accurate estimates of root turnover in forests of different climate zones.
Starting Page	755
Ending Page	762
Page Count	8
File Format	PDF
ISSN	09123814
Journal	Ecological Research
Volume Number	26
Issue Number	4
e-ISSN	14401703
Language	English
Publisher	Springer Japan
Publisher Date	2011-05-07
Publisher Place	Japan
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Fine roots Root life span Root diameter Root branch order Carbon cycling Evolutionary Biology Plant Sciences Behavioural Sciences Ecology Zoology Forestry
Content Type	Text
Resource Type	Article
Subject	Ecology, Evolution, Behavior and Systematics

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