气候变化领域集成服务门户(CCPortal): Bark decomposition in white oak soil outperforms eastern hemlock soil, while bark type leads to consistent changes in soil microbial composition

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DOI	10.1007/s10533-020-00701-7
	Bark decomposition in white oak soil outperforms eastern hemlock soil, while bark type leads to consistent changes in soil microbial composition
	Malik R.J.; Trexler R.V.; Eissenstat D.M.; Bell T.H.
发表日期	2020
ISSN	0168-2563
起始页码	329
结束页码	343
卷号	150 期号:3
英文摘要	Bark decomposition is an underexamined component of soil carbon cycling and soil community assembly. Numerous studies have shown faster decomposition of leaf litter in “home” environments (i.e. within soil adjacent to the plant that produced the leaves), suggesting potential legacy effects from previous deposition of similar litter. This is expected to occur through, in part, accumulation of microorganisms that metabolize substrates the litter provides. Whether a similar “home-field advantage” (HFA) exists for bark decomposition is unknown, but this dynamic may differ because annual bark deposits to soil are minimal relative to leaf deposits. We hypothesized that (1) as with leaf litter, bark will be better decomposed near to the tree from which it was collected, and (2) that decomposing bark can initiate change in soil microbial composition. To test these hypotheses, we used a full factorial design that included two bark types (collected from eastern hemlock, Tsuga canadensis, and white oak, Quercus alba) and two soil types (‘home’ and ‘away’) within a temperate mixed hardwood forest at the Shale Hills Catchment in central Pennsylvania, USA. Bark was excised from 25 replicates of each tree type, buried in either home or away soil, and incubated belowground from July 2017 to June 2018. Decomposition was assessed through proportionate mass loss over time, while microbial composition in the bark and adjacent soil was assessed through high-throughput sequencing of 16S rRNA gene and fungal ITS fragments. Overall, bark degraded faster in white oak soils, and there was also an effect of bark type on decomposition. Although white oak bark decomposed more quickly in its home environment, this could be due to either soil conditioning or inherent differences in the soils in which each species grows. Soil microbial assemblages also sorted according to bark type rather than soil type, suggesting that bark strongly influences the composition of nearby microorganisms during decomposition. Our results suggest that both bark type and soil type are important factors during bark decomposition, but our findings suggest no clear evidence for HFA. © 2020, The Author(s).
英文关键词	Bark; Decomposition; Eastern hemlock; Ecosystem ecology; Home-field advantage (HFA); Microbial ecology; Temperate forest; White oak
语种	英语
scopus关键词	bark; belowground biomass; deciduous forest; decomposition; fungus; microbial activity; soil carbon; soil chemistry; soil microorganism; soil type; temperate forest; Pennsylvania; Shale Hills; United States; Quercus alba; Tsuga canadensis
来源期刊	Biogeochemistry
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/153102
作者单位	Department of Ecosystem Science and Management, Penn State University, University Park, PA 16802, United States; Department of Plant Pathology and Environmental Microbiology, Penn State University, University Park, PA 16802, United States; Huck Institutes of Life Sciences – Intercollege Graduate Degree Program in Ecology, Penn State University, University Park, PA 16802, United States; Department of Ecology and Evolutionary Biology, and Kansas Biological Survey, The University of Kansas, Lawrence, KS 66045, United States
推荐引用方式 GB/T 7714	Malik R.J.,Trexler R.V.,Eissenstat D.M.,et al. Bark decomposition in white oak soil outperforms eastern hemlock soil, while bark type leads to consistent changes in soil microbial composition[J],2020,150(3).
APA	Malik R.J.,Trexler R.V.,Eissenstat D.M.,&Bell T.H..(2020).Bark decomposition in white oak soil outperforms eastern hemlock soil, while bark type leads to consistent changes in soil microbial composition.Biogeochemistry,150(3).
MLA	Malik R.J.,et al."Bark decomposition in white oak soil outperforms eastern hemlock soil, while bark type leads to consistent changes in soil microbial composition".Biogeochemistry 150.3(2020).