Linking 3D Soil Structure and Plant-Microbe-Soil Carbon Transfer in the Rhizosphere DOI Creative Commons
Alix Vidal, Juliane Hirte, S. Franz Bender

и другие.

Frontiers in Environmental Science, Год журнала: 2018, Номер 6

Опубликована: Фев. 9, 2018

Plant roots are major transmitters of atmospheric carbon into soil. The rhizosphere, the soil volume around living influenced by root activities, represents hotspots for organic inputs, microbial activity, and turnover. Rhizosphere processes remain poorly understood observation key mechanisms transfer protection in intact rhizosphere microenvironments challenging. We deciphered fate photosynthesis-derived (OC) wheat combining stable isotope labeling at field scale with high-resolution 3D-imaging. used nano-scale secondary ion mass spectrometry focus beam-scanning electron microscopy to generate insights nanometer scale. In immature roots, circulated through apoplastic pathway, via cell walls, from stele cortex. was transferred substantial communuties, mainly represented bacteria surrounding peripheral cells. Iron oxides formed bridges between bigger mineral particles, such as quartz, surrounded microaggregates close surface. Some were also intimately associated fungal hyphae Based on these results, we propose a conceptual model depicting biogeochemical interfaces forefront growing roots. observed complex interplays vectors (roots, fungi, bacteria), transferring plant-derived OC root-free stabilizing agents (iron oxides, microorganism products), potentially protecting within rhizosphere.

Язык: Английский

Soil Organic Matter Characterization by Fourier Transform Ion Cyclotron Resonance Mass Spectrometry (FTICR MS): A Critical Review of Sample Preparation, Analysis, and Data Interpretation DOI
William Bahureksa, Malak Tfaily, Rene Boiteau

и другие.

Environmental Science & Technology, Год журнала: 2021, Номер 55(14), С. 9637 - 9656

Опубликована: Июль 7, 2021

The biogeochemical cycling of soil organic matter (SOM) plays a central role in regulating health, water quality, carbon storage, and greenhouse gas emissions. Thus, many studies have been conducted to reveal how anthropogenic climate variables affect sequestration nutrient cycling. Among the analytical techniques used better understand speciation transformation SOM, Fourier transform ion cyclotron resonance mass spectrometry (FTICR MS) is only technique that has sufficient resolving power separate accurately assign elemental compositions individual SOM molecules. global increase application FTICR MS address complexity highlighted challenges opportunities associated with sample preparation, analysis, spectral interpretation. Here, we provide critical review recent strategies for characterization by emphasis on collection, data Data processing visualization methods are presented suggested workflows detail considerations needed molecular information derived from MS. Finally, highlight current research gaps, biases, future directions improve our understanding chemistry within terrestrial ecosystems.

Язык: Английский

Процитировано

159
Soil redox dynamics under dynamic hydrologic regimes - A review DOI
Zengyu Zhang, Alex Furman

The Science of The Total Environment, Год журнала: 2020, Номер 763, С. 143026 - 143026

Опубликована: Окт. 20, 2020

Язык: Английский

Процитировано

144
Microscale carbon distribution around pores and particulate organic matter varies with soil moisture regime DOI Creative Commons
Steffen Schlüter, Frederic Leuther, Lukas Albrecht

и другие.

Nature Communications, Год журнала: 2022, Номер 13(1)

Опубликована: Апрель 21, 2022

Abstract Soil carbon sequestration arises from the interplay of input and stabilization, which vary in space time. Assessing resulting microscale distribution an intact pore space, however, has so far eluded methodological accessibility. Here, we explore role soil moisture regimes shaping gradients by a novel mapping protocol for particulate organic matter matrix based on combination Osmium staining, X-ray computed tomography, machine learning. With three different types show that regime governs C losses redistribution stabilization patterns matrix. Carbon depletion around pores (aperture > 10 µm) occurs much larger volume (19–74%) than enrichment (1%). Thus, interacting processes shaped are decisive factor overall persistence.

Язык: Английский

Процитировано

105
Oxygen priming induced by elevated CO2 reduces carbon accumulation and methane emissions in coastal wetlands DOI
Genevieve L. Noyce, Alexander Smith, Matthew L. Kirwan

и другие.

Nature Geoscience, Год журнала: 2023, Номер 16(1), С. 63 - 68

Опубликована: Янв. 1, 2023

Язык: Английский

Процитировано

62
Dual role of silt and clay in the formation and accrual of stabilized soil organic carbon DOI
Hairuo Mao, Maurizio Cotrufo, Stephen C. Hart

и другие.

Soil Biology and Biochemistry, Год журнала: 2024, Номер 192, С. 109390 - 109390

Опубликована: Март 6, 2024

Язык: Английский

Процитировано

39
The anaerobic soil volume as a controlling factor of denitrification: a review DOI Creative Commons
Steffen Schlüter, Maik Lucas, Balázs Grosz

и другие.

Biology and Fertility of Soils, Год журнала: 2024, Номер unknown

Опубликована: Апрель 16, 2024

Abstract Denitrification is an important component of the nitrogen cycle in soil, returning reactive to atmosphere. activity often concentrated spatially anoxic microsites and temporally ephemeral events, which presents a challenge for modelling. The anaerobic fraction soil volume can be useful predictor denitrification soils. Here, we provide review this characteristic, its controlling factors, estimation from basic properties implementation current models. concept relationship has undergone several paradigm shifts that came along with advent new oxygen microstructure mapping techniques. understanding hotspots are partially decoupled air distances wet matrix mainly associated particulate organic matter (POM) form fresh plant residues or manure. POM fragments harbor large amounts labile carbon promote local consumption and, as result, these differ their aeration status surrounding matrix. Current models relate bulk concentration various ways but make little use information, such distance between air-filled pores. Based on meta-analyses, derive empirical relationships estimate conditions formation anoxia at microscale outline how could used future improve prediction accuracy profile scale.

Язык: Английский

Процитировано

20
Plant diversity drives positive microbial associations in the rhizosphere enhancing carbon use efficiency in agricultural soils DOI Creative Commons
Luiz A. Domeignoz‐Horta, Seraina L. Cappelli, Rashmi Shrestha

и другие.

Nature Communications, Год журнала: 2024, Номер 15(1)

Опубликована: Сен. 14, 2024

Expanding and intensifying agriculture has led to a loss of soil carbon. As agroecosystems cover over 40% Earth's land surface, they must be part the solution put in action mitigate climate change. Development efficient management practices maximize carbon retention is currently limited, part, by poor understanding how plants, which input soil, microbes, determine its fate there, interact. Here we implement diversity gradient intercropping undersown species with barley large field trial, ranging from one eight species. We find that increasing plant strengthens positive associations within rhizosphere microbial community relation negative associations. These associations, turn, enhance use efficiency. Jointly, our results highlight can used as strategy potential agricultural soils.

Язык: Английский

Процитировано

16
Microbial Carbon Use Efficiency and Growth Rates in Soil: Global Patterns and Drivers DOI
Junxi Hu, Yongxing Cui, Stefano Manzoni

и другие.

Global Change Biology, Год журнала: 2025, Номер 31(1)

Опубликована: Янв. 1, 2025

ABSTRACT Carbon use efficiency (CUE) of microbial communities in soil quantifies the proportion organic carbon (C) taken up by microorganisms that is allocated to growing biomass as well used for reparation cell components. This C amount subsequently involved turnover, partly leading necromass formation, which can be further stabilized soil. To unravel underlying regulatory factors and spatial patterns CUE on a large scale across biomes (forests, grasslands, croplands), we evaluated 670 individual data obtained three commonly approaches: (i) tracing substrate 13 (or 14 C) incorporation into respired CO 2 (hereafter C‐substrate), (ii) 18 O from water DNA ( O‐water), (iii) stoichiometric modelling based activities enzymes responsible nitrogen (N) cycles. The global mean depends approach: 0.59 C‐substrate approach, 0.34 O‐water approaches. Across biomes, was highest grassland soils, followed cropland forest soils. A power‐law relationship identified between growth rates, indicating faster utilization corresponds reduced losses maintenance associated with mortality. Microbial rate increased content C, total N, phosphorus, fungi/bacteria ratio. Our results contribute understanding linkage rates CUE, thereby offering insights impacts climate change ecosystem disturbances physiology consequences cycling.

Язык: Английский

Процитировано

2
Anoxic microsites in upland soils dominantly controlled by clay content DOI Creative Commons
Marco Keiluweit, K. E. Gee,

A. Denney

и другие.

Soil Biology and Biochemistry, Год журнала: 2017, Номер 118, С. 42 - 50

Опубликована: Дек. 22, 2017

Язык: Английский

Процитировано

143
Unifying soil organic matter formation and persistence frameworks: the MEMS model DOI Creative Commons
Andy D. Robertson, Keith Paustian, Stephen M. Ogle

и другие.

Biogeosciences, Год журнала: 2019, Номер 16(6), С. 1225 - 1248

Опубликована: Март 25, 2019

Abstract. Soil organic matter (SOM) dynamics in ecosystem-scale biogeochemical models have traditionally been simulated as immeasurable fluxes between conceptually defined pools. This greatly limits how empirical data can be used to improve model performance and reduce the uncertainty associated with their predictions of carbon (C) cycling. Recent advances our understanding processes that govern SOM formation persistence demand a new mathematical structure built around key mechanisms biogeochemically relevant Here, we present one approach aims address this need. Our (MEMS v1.0) is developed from Microbial Efficiency-Matrix Stabilization framework, which emphasizes importance linking chemistry inputs efficiency microbial processing ultimately soil mineral matrix, when studying stabilization. Building on MEMS v1.0 also capable simulating concept C saturation represents decomposition physico-chemical stabilization define into four primary fractions. After describing detail, optimize parameters identified through variance-based sensitivity analysis. Optimization employed fractionation 154 sites diverse environmental conditions, directly equating mineral-associated particulate fractions corresponding Finally, was evaluated using total topsoil (0–20 cm) 8192 forest grassland across Europe. Despite relative simplicity model, it able accurately capture general trends stocks extensive gradients temperature, precipitation, annual texture. The novel takes simulate has potential forecasts soils respond management perturbation. Ensuring these are accurate effectively informing policy sustainability ecosystem services help mitigate climate change.

Язык: Английский

Процитировано

137