Fast-decaying plant litter enhances soil carbon in temperate forests but not through microbial physiological traits

被引:212
作者
Craig, Matthew E. [1 ,2 ,3 ]
Geyer, Kevin M. [4 ,5 ]
Beidler, Katilyn, V [1 ]
Brzostek, Edward R. [6 ]
Frey, Serita D. [4 ]
Grandy, A. Stuart [4 ]
Liang, Chao [7 ]
Phillips, Richard P. [1 ]
机构
[1] Indiana Univ, Dept Biol, Bloomington, IN 47405 USA
[2] Oak Ridge Natl Lab, Environm Sci Div, Oak Ridge, TN 37830 USA
[3] Oak Ridge Natl Lab, Climate Change Sci Inst, Oak Ridge, TN 37830 USA
[4] Univ New Hampshire, Dept Nat Resources & Environm, Durham, NH 03824 USA
[5] Young Harris Coll, Dept Biol, Young Harris, GA USA
[6] West Virginia Univ, Dept Biol, Morgantown, WV 26506 USA
[7] Chinese Acad Sci, Inst Appl Ecol, Key Lab Forest Ecol & Management, Shenyang, Peoples R China
基金
美国国家科学基金会; 中国国家自然科学基金;
关键词
ORGANIC-MATTER FORMATION; PARTICLE-SIZE FRACTIONS; USE EFFICIENCY; STABILIZATION DYNAMICS; N STABILIZATION; INPUTS; DECOMPOSITION; NITROGEN; STORAGE; ROOT;
D O I
10.1038/s41467-022-28715-9
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
Mineral-associated soil carbon buildup is poorly explained by microbial necromass production (a common hypothesis). During litter decomposition, these processes are decoupled by priming effects and alternate soil carbon formation pathways Conceptual and empirical advances in soil biogeochemistry have challenged long-held assumptions about the role of soil micro-organisms in soil organic carbon (SOC) dynamics; yet, rigorous tests of emerging concepts remain sparse. Recent hypotheses suggest that microbial necromass production links plant inputs to SOC accumulation, with high-quality (i.e., rapidly decomposing) plant litter promoting microbial carbon use efficiency, growth, and turnover leading to more mineral stabilization of necromass. We test this hypothesis experimentally and with observations across six eastern US forests, using stable isotopes to measure microbial traits and SOC dynamics. Here we show, in both studies, that microbial growth, efficiency, and turnover are negatively (not positively) related to mineral-associated SOC. In the experiment, stimulation of microbial growth by high-quality litter enhances SOC decomposition, offsetting the positive effect of litter quality on SOC stabilization. We suggest that microbial necromass production is not the primary driver of SOC persistence in temperate forests. Factors such as microbial necromass origin, alternative SOC formation pathways, priming effects, and soil abiotic properties can strongly decouple microbial growth, efficiency, and turnover from mineral-associated SOC.
引用
收藏
页数:10
相关论文
共 89 条
[1]   The Millennial model: in search of measurable pools and transformations for modeling soil carbon in the new century [J].
Abramoff, Rose ;
Xu, Xiaofeng ;
Hartman, Melannie ;
O'Brien, Sarah ;
Feng, Wenting ;
Davidson, Eric ;
Finzi, Adrien C. ;
Moorhead, Daryl ;
Schimel, Josh ;
Torn, Margaret ;
Mayes, Melanie A. .
BIOGEOCHEMISTRY, 2018, 137 (1-2) :51-71
[2]   Towards an integration of ecological stoichiometry and the metabolic theory of ecology to better understand nutrient cycling [J].
Allen, Andrew P. ;
Gillooly, James F. .
ECOLOGY LETTERS, 2009, 12 (05) :369-384
[3]   Soil-carbon response to warming dependent on microbial physiology [J].
Allison, Steven D. ;
Wallenstein, Matthew D. ;
Bradford, Mark A. .
NATURE GEOSCIENCE, 2010, 3 (05) :336-340
[4]  
Amelung W., 2001, Assessment Methods for Soil Carbon Pools, P233
[5]   CTFS-ForestGEO: a worldwide network monitoring forests in an era of global change [J].
Anderson-Teixeira, Kristina J. ;
Davies, Stuart J. ;
Bennett, Amy C. ;
Gonzalez-Akre, Erika B. ;
Muller-Landau, Helene C. ;
Wright, S. Joseph ;
Abu Salim, Kamariah ;
Almeyda Zambrano, Angelica Maria ;
Alonso, Alfonso ;
Baltzer, Jennifer L. ;
Basset, Yves ;
Bourg, Norman A. ;
Broadbent, Eben N. ;
Brockelman, Warren Y. ;
Bunyavejchewin, Sarayudh ;
Burslem, David F. R. P. ;
Butt, Nathalie ;
Cao, Min ;
Cardenas, Dairon ;
Chuyong, George B. ;
Clay, Keith ;
Cordell, Susan ;
Dattaraja, Handanakere S. ;
Deng, Xiaobao ;
Detto, Matteo ;
Du, Xiaojun ;
Duque, Alvaro ;
Erikson, David L. ;
Ewango, Corneille E. N. ;
Fischer, Gunter A. ;
Fletcher, Christine ;
Foster, Robin B. ;
Giardina, Christian P. ;
Gilbert, Gregory S. ;
Gunatilleke, Nimal ;
Gunatilleke, Savitri ;
Hao, Zhanqing ;
Hargrove, William W. ;
Hart, Terese B. ;
Hau, Billy C. H. ;
He, Fangliang ;
Hoffman, Forrest M. ;
Howe, Robert W. ;
Hubbell, Stephen P. ;
Inman-Narahari, Faith M. ;
Jansen, Patrick A. ;
Jiang, Mingxi ;
Johnson, Daniel J. ;
Kanzaki, Mamoru ;
Kassim, Abdul Rahman .
GLOBAL CHANGE BIOLOGY, 2015, 21 (02) :528-549
[6]  
[Anonymous], **DATA OBJECT**, DOI DOI 10.15485/1835182
[7]   NATURAL C-13 ABUNDANCE AS A TRACER FOR STUDIES OF SOIL ORGANIC-MATTER DYNAMICS [J].
BALESDENT, J ;
MARIOTTI, A ;
GUILLET, B .
SOIL BIOLOGY & BIOCHEMISTRY, 1987, 19 (01) :25-30
[8]   COLORIMETRIC DETERMINATION OF OXIDIZABLE CARBON IN ACID SOIL SOLUTIONS [J].
BARTLETT, RJ ;
ROSS, DS .
SOIL SCIENCE SOCIETY OF AMERICA JOURNAL, 1988, 52 (04) :1191-1192
[9]  
Berg B., 2003, Plant litter: decomposition, humus formation, carbon sequestration
[10]   13C and 15N stabilization dynamics in soil organic matter fractions during needle and fine root decomposition [J].
Bird, Jeffrey A. ;
Kleber, Markus ;
Torn, Margaret S. .
ORGANIC GEOCHEMISTRY, 2008, 39 (04) :465-477