MONet (Molecular Observation Network) is an open science network developed by EMSL to build a continental-scale database of standardized molecular and microstructural soil data. The initiative aims to advance understanding and prediction of microbially and root-driven inputs in soil ecosystems and terrestrial aerosol processes. MONet collects thousands of soil samples across US ecoregions to develop a comprehensive FAIR database of molecular and microscale information on soil composition, structure, water characteristics, microbial communities, and biogenic emissions. Data is publicly available on EMSL Science Central without embargo. First capability launched February 2023 with the Soil Function soil core solicitation.
Lead institution:
Pacific Northwest National Laboratory
Funding:
DOE BER
/ Environmental Molecular Sciences Laboratory
Initiative:
MONet
Established:
2023
Principal investigators:
John Bargar
Principal Investigator
Pacific Northwest National Laboratory
Emily B. Graham
Co-Investigator
Pacific Northwest National Laboratory
Odeta Qafoku
Co-Investigator
Pacific Northwest National Laboratory
Scientific questions:
- How do molecular and microscale processes determine whether soil carbon enters the atmosphere or remains sequestered?
- What drives microbially and root-driven carbon inputs in soil ecosystems?
- How can molecular-scale soil data be integrated into Earth system models?
Keywords:
Soil Carbon
Soil Microbiome
Soil Organic Matter
Metagenomics
Carbon Cycling
Decomposition
Data types:
Metabolomics
Metagenomics
Imaging Data
Biogeochemical Data
Soil Microbiome Data
Modalities:
Mass Spectrometry
Metagenomics
Imaging
Field Experiments
Laboratory Experiments
Field Sites
22
NEON Terrestrial Sites Network
(Continental United States and territories)
MONet leverages NEON's 47 terrestrial field sites across 20 ecoclimatic domains spanning the continental United States, Alaska, Hawaii, and Puerto Rico. Sites represent diverse ecosystems including forests, grasslands, shrublands, and wetlands. Each domain has 1-3 terrestrial sites with standardized sampling protocols. MONet-NEON First Collection ran September 2023 to July 2024.
Harvard Forest (HARV)
(Massachusetts)
NEON Domain 01 - Northeast temperate forest site with archived soil cores
Konza Prairie (KONZ)
(Kansas)
NEON Domain 06 - Prairie grassland site in the Great Plains
Ordway-Swisher Biological Station (OSBS)
(Florida)
NEON Domain 03 - Southeast longleaf pine and oak scrub ecosystem
W.K. Kellogg Biological Station
(Hickory Corners, Michigan)
Michigan State University long-term ecological research site. Sarah Evans (MSU) is studying how agricultural management affects soil molecular properties, linking soil measurements to management decisions (tillage, cover crops, perennials) and ecosystem service outcomes. Summer 2024 campaign.
MSU Bioenergy Cropping Systems
(Hickory Corners, Michigan)
Alexandra Kravchenko (MSU) sampling energy sorghum, switchgrass (perennial monoculture), restored prairie (perennial polyculture), and poplar (fast-growing woody species) to obtain high-resolution molecular, microbial, and structural soil data. Goal is understanding microscale interactions leading to soil carbon accrual under long-term bioenergy cropping systems. Spring 2025 campaign.
Eastern Cottonwood Bioenergy Plantation
(Algoma, Mississippi)
Heidi Renninger (Mississippi State) studying soil carbon sequestration through eastern cottonwood short rotation woody crops for sustainable aviation fuel feedstocks. Quantifying carbon accrual rates and soil carbon processes in short rotation woody crop fields. Summer 2024 campaign.
ORNL Bioenergy Plant-Soil Site
(Midland, Oregon)
Udaya Kalluri (ORNL) characterizing bioenergy plant-soil interactions and soil health under field conditions. Spring 2025 campaign.
WSU Potato Cropland Management
(Mount Vernon, Washington)
Deirdre Griffin-LaHue (WSU) investigating four soil management systems along a disturbance gradient in potato-driven crop rotations. Evaluating practices to improve soil functions including water supply, drainage, residue breakdown, and nutrient cycling while addressing soil degradation from intensive tillage. Winter 2024 campaign.
Stanford Salinas Valley Vegetable Systems
(Salinas, California)
Robert Jackson (Stanford) assessing cover-crop system effectiveness in reducing excess nitrogen fertilizer losses through leaching, runoff, and emissions in vegetable production systems. Winter 2024 campaign.
Umpqua National Forest Wildfire Sites
(Umpqua National Forest, Oregon)
USDA Forest Service ecologist Devin McMahon collecting and comparing severely burned soils with soils in areas of little apparent fire impact. Sampling allows land managers to assess effects of severe wildfire and postfire management on soil physical, chemical, and biological properties. Soil analyses provide microbial community data to form baseline for discussing potential impacts of forest management. Summer 2024 campaign.
California Sage Scrub Fire Frequency Sites
(Claremont, California)
Jason Keller (Claremont McKenna) sampling California sage scrub ecosystems experiencing nonnative invasion, urbanization, and changing fire frequency to analyze carbon/nitrogen shifts and microbial community changes. Winter 2024 campaign.
Rocky Mountain Snowpack Decline Sites
(Crested Butte, Colorado)
Mariah Carbone (NAU) quantifying how declining snowpack and earlier snowmelt affect soil CO2 flux and plant-microbial processes across forest elevations. Winter 2024 campaign.
Blue River Drought Hydraulic Redistribution Site
(Blue River, Oregon)
Alexander Takver (Oregon State) studying hydraulic redistribution affecting soil properties and carbon dynamics during drought conditions. Summer 2024 campaign.
Grinnell Glacier Climate Change Site
(Grinnell Glacier, Glacier National Park, Montana)
Christine Foreman (Montana State) studying glacier retreat impacts on downstream ecosystems and microbial communities at this rapidly receding glacier. Summer 2024 campaign.
Unalaska Island Climate-Defense Site
(Unalaska Island, Alaska)
Yu (Frank) Yang (University of Nevada, Reno) studying soil organic carbon dynamics under climate change at formerly used defense sites. Summer 2024 campaign.
Douglas-fir Forest Health Sites
(Stabler, Washington)
James Lutz (Utah State) examining how belowground soil and microbial characteristics vary around large-diameter Douglas-fir trees at different life stages (healthy, declining, standing dead, decomposing logs). Winter 2024 campaign.
Smoot Hill Invasive Species Site
(Smoot Hill, Eastern Washington)
Tanya Cheeke (WSU Tri-Cities) studying impacts of Ventenata dubia invasion on above- and below-ground communities in Palouse prairie ecosystem. Summer 2024 campaign.
Sevilleta National Wildlife Refuge
(Sevilleta National Wildlife Refuge, New Mexico)
Rae DeVan (University of New Mexico) studying water availability and plant cycles affecting microbial activity in arid lands of the desert southwest. Summer 2024 campaign.
Jornada Experimental Range
(Las Cruces, New Mexico)
Kalpana Kukreja (UT El Paso) investigating phosphorus acquisition through microbial distribution and organic acid production. Spring 2025 campaign.
Worcester Urban Soils Gradient
(Worcester and Petersham, Massachusetts)
Matt Kaufman (Worcester State) examining urban soil properties across an urbanization gradient to understand anthropogenic impacts on soil composition. Spring 2025 campaign.
North Carolina Coastal Wetlands
(Wilmington, North Carolina)
Lori Sutter (UNC Wilmington) comparing microbial and plant-driven ecosystem function across sites with varying salinity and tidal conditions in wetland and saline marshland. Spring 2025 campaign.
Studies
5
1000 Soils Pilot
(Emily B. Graham)
Pilot study collecting standardized soil samples across US ecoregions to develop continental-scale molecular and microstructural soil database. Samples analyzed using FTICR-MS for organic matter composition, X-ray computed tomography for 3D pore structure, and metagenomics via JGI partnership. Includes geochemistry, texture, respiration, enzyme activities, and microbial biomass measurements.
Data modalities:
Metabolomics
Metagenomics
Imaging Data
Biogeochemical Data
Keywords:
Soil Carbon
Soil Organic Matter
Carbon Cycling
MONet-NEON First Collection
(Sarah Leichty)
Advanced soil physical, chemical and biological characterization of soil cores from all ecoregions within the United States through partnership with National Ecological Observatory Network (NEON). Observational sampling September 2023 to July 2024.
Data modalities:
Metabolomics
Metagenomics
Biogeochemical Data
Keywords:
Soil Carbon
Soil Microbiome
MONet Soil Function Call
(John Bargar)
First major MONet capability launched February 2023. Community soil core solicitation with standardized analysis workflows. JGI proposal 510110 for metagenome sequencing.
Data modalities:
Metabolomics
Metagenomics
Imaging Data
Keywords:
Soil Carbon
Soil Organic Matter
MONet Winter Soil Sampling 2024
Five selected projects: Douglas-fir forest function (Lutz, Utah State), potato cropland management (Griffin-LaHue, WSU), vegetable cropping nitrogen (Jackson, Stanford), snowpack decline effects (Carbone, NAU), sage scrub recovery (Keller, Claremont McKenna).
Data modalities:
Metagenomics
Biogeochemical Data
Keywords:
Soil Carbon
Carbon Cycling
SOILS-AI Campaign
(Sakthi Kumaran)
Soil Organic Indicators at Large Scale for Artificial Intelligence campaign targeting ten underrepresented soil orders to strengthen AI models for soil carbon dynamics. Applies pedotransfer functions to upscale measurements to continental scales.
Data modalities:
Metabolomics
Metagenomics
Imaging Data
Biogeochemical Data
Keywords:
Soil Carbon
Machine Learning
Carbon Cycling
Source:
SOILS-AI Campaign | EMSL
EMSL proposal call page describing the campaign goals, targeted soil orders, sampling protocols, and how to submit proposals.
Key Publications
2
doi:10.3389/fsoil.2023.1120425
One thousand soils for molecular understanding of belowground carbon cycling
- MONet pilot collected standardized soil samples using molecular techniques including FTICR-MS and X-ray computed tomography to advance understanding of belowground carbon cycling.
- Wildfire may result in oxidation of SOM and structural changes to soil pore networks that persist into deeper soils, with reduced soil respiration, microbial biomass, and enzyme activity.
doi:10.1029/2024GL113091
Scaling High-Resolution Soil Organic Matter Composition to Improve Predictions of Potential Soil Respiration Across the Continental United States
- Machine learning can distill thousands of SOM formulas into tractable units for integration into soil respiration models.
- In surface soils, SOM chemistry provides better estimates of potential soil respiration than soil physicochemistry alone; combining both yields the best prediction.
Datasets
1
1000 Soils Pilot Dataset
Comprehensive dataset from MONet 1000 Soils Pilot including geochemistry, texture, respiration, enzyme activities, FTICR-MS organic matter chemistry, microbial biomass C and N, water-extractable organic matter TOC/TDN, X-ray computed tomography metrics, metagenomes, and soil hydraulic properties. Interactive visualization at https://shinyproxy.emsl.pnnl.gov/app/1000soils
Repository:
Zenodo
Data type:
multi-omics
Collaborators:
Joint Genome Institute (sequencing and metagenome analysis), National Ecological Observatory Network (field sites and continuous sensing), National Microbiome Data Collaborative (microbiome metadata standards)