globalchange  > 气候变化事实与影响
DOI: 10.1111/gcb.14548
WOS记录号: WOS:000461817500024
论文题名:
Soil organic carbon stability in forests: Distinct effects of tree species identity and traits
作者: Angst, Gerrit1; Mueller, Kevin E.2,3; Eissenstat, David M.3,4; Trumbore, Susan5,6; Freeman, Katherine H.7; Hobbie, Sarah E.8; Chorover, Jon9; Oleksyn, Jacek10,11; Reich, Peter B.10,12; Mueller, Carsten W.13
通讯作者: Angst, Gerrit
刊名: GLOBAL CHANGE BIOLOGY
ISSN: 1354-1013
EISSN: 1365-2486
出版年: 2019
卷: 25, 期:4, 页码:1529-1546
语种: 英语
英文关键词: C-14 ; N-15 ; common garden ; heterotrophic respiration ; mineral associated SOM ; physical fractionation ; stoichiometry
WOS关键词: DENSITY FRACTIONATION ; NATURAL-ABUNDANCE ; MATTER DYNAMICS ; EUROPEAN BEECH ; COMMON GARDEN ; TEMPERATE ; STABILIZATION ; STOCKS ; NITROGEN ; PLANT
WOS学科分类: Biodiversity Conservation ; Ecology ; Environmental Sciences
WOS研究方向: Biodiversity & Conservation ; Environmental Sciences & Ecology
英文摘要:

Rising atmospheric CO2 concentrations have increased interest in the potential for forest ecosystems and soils to act as carbon (C) sinks. While soil organic C contents often vary with tree species identity, little is known about if, and how, tree species influence the stability of C in soil. Using a 40 year old common garden experiment with replicated plots of eleven temperate tree species, we investigated relationships between soil organic matter (SOM) stability in mineral soils and 17 ecological factors (including tree tissue chemistry, magnitude of organic matter inputs to the soil and their turnover, microbial community descriptors, and soil physicochemical properties). We measured five SOM stability indices, including heterotrophic respiration, C in aggregate occluded particulate organic matter (POM) and mineral associated SOM, and bulk SOM delta N-15 and increment C-14. The stability of SOM varied substantially among tree species, and this variability was independent of the amount of organic C in soils. Thus, when considering forest soils as C sinks, the stability of C stocks must be considered in addition to their size. Further, our results suggest tree species regulate soil C stability via the composition of their tissues, especially roots. Stability of SOM appeared to be greater (as indicated by higher delta N-15 and reduced respiration) beneath species with higher concentrations of nitrogen and lower amounts of acid insoluble compounds in their roots, while SOM stability appeared to be lower (as indicated by higher respiration and lower proportions of C in aggregate occluded POM) beneath species with higher tissue calcium contents. The proportion of C in mineral associated SOM and bulk soil increment C-14, though, were negligibly dependent on tree species traits, likely reflecting an insensitivity of some SOM pools to decadal scale shifts in ecological factors. Strategies aiming to increase soil C stocks may thus focus on particulate C pools, which can more easily be manipulated and are most sensitive to climate change.


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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/133864
Appears in Collections:气候变化事实与影响

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作者单位: 1.Czech Acad Sci, Inst Soil Biol & SoWa Res Infrastruct, Biol Ctr, Ceske Budejovice, Czech Republic
2.Cleveland State Univ, Biol Geol & Environm Sci, Cleveland, OH 44115 USA
3.Penn State Univ, Intercoll Grad Degree Program Ecol, University Pk, PA 16802 USA
4.Penn State Univ, Dept Ecosyst Sci & Management, University Pk, PA 16802 USA
5.Max Planck Inst Biogeochem, Biogeochem Proc, Jena, Germany
6.Univ Calif Irvine, Dept Earth Syst Sci, Irvine, CA USA
7.Penn State Univ, Dept Geosci, University Pk, PA 16802 USA
8.Univ Minnesota, Dept Ecol Evolut & Behav, St Paul, MN 55108 USA
9.Univ Arizona, Dept Soil Water & Environm Sci, Tucson, AZ USA
10.Univ Minnesota, Dept Forest Resources, St Paul, MN 55108 USA
11.Polish Acad Sci, Inst Dendrol, Kornik, Poland
12.Western Sydney Univ, Hawkesbury Inst Environm, Penrith, NSW, Australia
13.TUM, Chair Soil Sci, Freising Weihenstephan, Germany

Recommended Citation:
Angst, Gerrit,Mueller, Kevin E.,Eissenstat, David M.,et al. Soil organic carbon stability in forests: Distinct effects of tree species identity and traits[J]. GLOBAL CHANGE BIOLOGY,2019-01-01,25(4):1529-1546
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