Hyphae move matter and microbes to mineral microsites: Integrating the hyphosphere into conceptual models of soil organic matter stabilization DOI
Craig R. See, Adrienne B. Keller, Sarah E. Hobbie

et al.

Global Change Biology, Journal Year: 2022, Volume and Issue: 28(8), P. 2527 - 2540

Published: Jan. 6, 2022

Associations between soil minerals and microbially derived organic matter (often referred to as mineral-associated or MAOM) form a large pool of slowly cycling carbon (C). The rhizosphere, immediately adjacent roots, is thought control the spatial extent MAOM formation because it dominant entry point new C inputs soil. However, emphasis on rhizosphere implicitly assumes that microbial redistribution into bulk (non-rhizosphere) soils minimal. We question this assumption, arguing extensive fungal exploration rapid hyphal turnover, from common, encourages formation. First, we summarize published estimates length density turnover rates demonstrate are high throughout rhizosphere-bulk continuum. Second, colonization surfaces common dispersal mechanism for bacteria, argue allows non-random mineral by hyphae-associated taxa. Third, these bacterial communities their hosts determine chemical deposited colonized surfaces. Collectively, our analysis demonstrates omission hyphosphere conceptual models flow overlooks key mechanisms in soils. Moving forward, there clear need spatially explicit, quantitative research characterizing environmental drivers community composition across systems, important controls over rate chemistry minerals.

Language: Английский

Conceptualizing soil organic matter into particulate and mineral‐associated forms to address global change in the 21st century DOI Creative Commons
Jocelyn M. Lavallee, Jennifer L. Soong, Maurizio Cotrufo

et al.

Global Change Biology, Journal Year: 2019, Volume and Issue: 26(1), P. 261 - 273

Published: Oct. 6, 2019

Managing soil organic matter (SOM) stocks to address global change challenges requires well-substantiated knowledge of SOM behavior that can be clearly communicated between scientists, management practitioners, and policy makers. However, is incredibly complex separation into multiple components with contrasting in order study predict its dynamics. Numerous diverse schemes are currently used, making cross-study comparisons difficult hindering broad-scale generalizations. Here, we recommend separating particulate (POM) mineral-associated (MAOM) forms, two fundamentally different terms their formation, persistence, functioning. We provide evidence highly physical chemical properties, mean residence times soil, responses land use change, plant litter inputs, warming, CO2 enrichment, N fertilization. Conceptualizing POM versus MAOM a feasible, well-supported, useful framework will allow scientists move beyond studies bulk SOM, but also consistent scheme across studies. Ultimately, propose the as best way forward understand dynamics context necessary recommendations managers

Language: Английский

Citations

1348
Quantitative assessment of microbial necromass contribution to soil organic matter DOI Creative Commons
Chao Liang, Wulf Amelung, Johannes Lehmann

et al.

Global Change Biology, Journal Year: 2019, Volume and Issue: 25(11), P. 3578 - 3590

Published: July 31, 2019

Soil carbon transformation and sequestration have received significant interest in recent years due to a growing need for quantitating its role mitigating climate change. Even though our understanding of the nature soil organic matter has recently been substantially revised, fundamental uncertainty remains about quantitative importance microbial necromass as part persistent matter. Addressing this hampered by absence assessments whether makes up majority soil. Direct quantitation is very challenging because an overlapping molecular signature with nonmicrobial carbon. Here, we use comprehensive analysis existing biomarker amino sugar data published between 1996 2018, combined novel appropriation using ecological systems approach, elemental carbon-nitrogen stoichiometry, scaling, demonstrate suit strategies contribution microbe-derived topsoil reservoir global temperate agricultural, grassland, forest ecosystems. We show that can make more than half Hence, suggest next-generation field management requires promoting biomass formation preservation maintain healthy soils, ecosystems, climate. Our analyses important implications improving current models, helping develop practices policies.

Language: Английский

Citations

1086
Plant- or microbial-derived? A review on the molecular composition of stabilized soil organic matter DOI Creative Commons
Gerrit Angst, Kevin E. Mueller, Klaas G.J. Nierop

et al.

Soil Biology and Biochemistry, Journal Year: 2021, Volume and Issue: 156, P. 108189 - 108189

Published: March 1, 2021

Language: Английский

Citations

717
Microbial necromass as the source of soil organic carbon in global ecosystems DOI
Baorong Wang, Shaoshan An, Chao Liang

et al.

Soil Biology and Biochemistry, Journal Year: 2021, Volume and Issue: 162, P. 108422 - 108422

Published: Sept. 14, 2021

Language: Английский

Citations

480
Soil organic matter formation, persistence, and functioning: A synthesis of current understanding to inform its conservation and regeneration DOI
Maurizio Cotrufo, Jocelyn M. Lavallee

Advances in agronomy, Journal Year: 2022, Volume and Issue: unknown, P. 1 - 66

Published: Jan. 1, 2022

Language: Английский

Citations

353
Soil organic carbon response to global environmental change depends on its distribution between mineral-associated and particulate organic matter: A meta-analysis DOI Creative Commons
Katherine S. Rocci, Jocelyn M. Lavallee, Catherine E. Stewart

et al.

The Science of The Total Environment, Journal Year: 2021, Volume and Issue: 793, P. 148569 - 148569

Published: June 22, 2021

Language: Английский

Citations

279
Contrasting pathways of carbon sequestration in paddy and upland soils DOI
Xiangbi Chen,

Yajun Hu,

Yinhang Xia

et al.

Global Change Biology, Journal Year: 2021, Volume and Issue: 27(11), P. 2478 - 2490

Published: March 13, 2021

Paddy soils make up the largest anthropogenic wetlands on earth, and are characterized by a prominent potential for organic carbon (C) sequestration. By quantifying plant- microbial-derived C in across four climate zones, we identified that accrual is achieved via contrasting pathways paddy upland soils. Paddies 39%-127% more efficient soil (SOC) sequestration than their adjacent counterparts, with greater differences warmer cooler climates. Upland replenished C, whereas enriched proportion of plant-derived because retarded microbial decomposition under anaerobic conditions induced flooding paddies. Under both land-use types, maximal contribution plant residues to SOC at intermediate mean annual temperature (15-20°C), neutral (pH~7.3), low clay/sand ratio. contrast, high (~24°C), pH (~5), large ratio favorable strengthening necromass. The necromass waterlogged paddies climates likely due fast anabolism from bacteria, fungi unlikely be involved as they aerobic. In scenario conversion upland, total 504 Tg may lost CO

Language: Английский

Citations

239
Speciation of heavy metals in soils and their immobilization at micro-scale interfaces among diverse soil components DOI Creative Commons
Qi Li, Yanhong Wang, Yichun Li

et al.

The Science of The Total Environment, Journal Year: 2022, Volume and Issue: 825, P. 153862 - 153862

Published: Feb. 15, 2022

Heavy metal (HM) pollution of soils is a globally important ecological and environmental problem. Previous studies have focused on i) tracking sources in HM-contaminated soils, ii) exploring the adsorption capacity distribution HMs, iii) assessing phyto-uptake HMs their ecotoxicity. However, few reviews systematically summarized HM soil-plant systems over past decade. Understanding mechanisms interaction between solid soil components consequently key to effectively controlling remediating pollution. compositions phases are diverse, structures complex, spatial arrangements heterogeneous, all leading formation micro-domains that exhibit different particle sizes surface properties. The various interactions ultimately control speciation, transformation, bioavailability soils. Over decades, extensive application advanced instrumental techniques methods has greatly expanded our understanding behavior organic mineral assemblages. In this review, investigating immobilization by minerals, compounds, microorganisms, associated complexes summarized, with particular emphasis interfacial HMs. addition, for analyzing speciation aggregates natural also discussed. Moreover, we review speciating at mineral-organic micro-scale interfaces. Lastly, developmental prospects research inorganic-organic interfaces outlined. future research, most should be used characterize situ characteristics metals complexes. particular, roles contributions microorganisms complex require significant further investigation.

Language: Английский

Citations

225
The soil microbial carbon pump: From conceptual insights to empirical assessments DOI
Xuefeng Zhu, Randall D. Jackson, Evan H. DeLucia

et al.

Global Change Biology, Journal Year: 2020, Volume and Issue: 26(11), P. 6032 - 6039

Published: Aug. 26, 2020

Abstract The global soil carbon (C) pool is massive, so relatively small changes in organic (SOC) stocks can significantly alter atmospheric C and climate. recently proposed concept of the microbial pump (MCP) emphasizes active role microbes SOC storage by integrating continual transformation from labile to persistent anabolic forms. However, has not been evaluated with data. Here, we combine datasets, including necromass biomarker amino sugars SOC, two long‐term agricultural field studies conducted large United States bioenergy research programs. We interrogate MCP investigating asynchronous responses land‐use change. Microbial appeared preferentially accumulate be dominant contributor accrual diversified perennial crops. Specifically, ~92% additional enhanced plant diversity was estimated C, >76% transition annual crops necromass. This suggests that stimulated agroecosystems. further delineate suggest parameters—soil capacity efficacy —reflecting conversion into contribution respectively, should serve as valuable metrics for future evaluating under alternative management changing climates.

Language: Английский

Citations

212
Climate, carbon content, and soil texture control the independent formation and persistence of particulate and mineral-associated organic matter in soil DOI
Michelle L. Haddix, E. G. Gregorich, Bobbi L. Helgason

et al.

Geoderma, Journal Year: 2020, Volume and Issue: 363, P. 114160 - 114160

Published: Jan. 17, 2020

Language: Английский

Citations

206