SomSOM

Self-organisation of microbial soil organic matter turnover

Microbial turnover of soil organic matter (SOM) is key for the terrestrial carbon (C) cycle. Its underlying mechanisms, however, are not fully understood. The role of soil microbes for organic matter turnover has so far been studied mainly from the point of view of microbial physiology, stoichiometry or community composition. I propose to shed new light on it from the perspective of complex systems science.
Microbial decomposition of organic matter requires the concerted action of functionally different microbes interacting with each other in a spatially structured environment. From complex systems theory, it is known that interactions among individuals at the microscale can lead to an ‘emergent’ system behavior, or ‘self-organisation’, at the macroscale, which adds a new quality to the system that cannot be derived from the traits of the interacting agents. Importantly, if microbial decomposer systems are self-organised, they may behave in a different way as currently assumed, especially under changing environmental conditions.
The aim of this project is thus to investigate i) if microbial decomposition of organic matter is driven by emergent behaviour, and ii) what consequences this has for soil C and nitrogen cycling. Combining state-of-the-art methods from soil biogeochemistry, microbial ecology, and complex systems science I will:

  • Investigate mechanisms of spatial self-organization of microbial decomposer communities by linking microscale observations from experimental microcosms to mathematical, individual-based modelling,

  • Elucidate microbial interaction networks across the soil’s microarchitecture by linking microbial community composition, process rates and chemical composition of spatially explicit soil micro-units at an unprecedented small and pertinent scale.

  • Explore fundamental patterns of self-organisation by applying the framework of complex systems science to high-resolution spatial and temporal data of soil microstructure and process rates.

Project ID

819446

Funding period

1 May 2019 - 30 April 2025

Total budget

€1,896,129.00

EU contribution

€1,896,129.00

Funding programme

Horizon 2020

Call for proposals

ERC-2018-COG

Type of action

ERC-COG Consilidator Grant

Type of stakeholder

Not specified

Project contribution to Mission Soil’s:

Specific objectives

  • 1. Reduce land degradation relating to desertification
    Not targeted
  • 2. Conserve and increase soil organic carbon stocks
    Partially targeted
  • 3. No net soil sealing and increase the reuse of urban soils
    Not targeted
  • 4. Reduce soil pollution and enhance restoration
    Not targeted
  • 5. Prevent erosion
    Not targeted
  • 6. Improve soil structure to enhance habitat quality for soil biota and crops
    Partially targeted
  • 7. Reduce the EU global footprint on soils
    Not targeted
  • 8. Increase soil literacy in society across Member States
    Not targeted

Operational objectives

  • 1. Build capacities and the knowledge base for soil stewardship
    Not targeted
  • 2. Co-create and upscale place-based innovations to improve soil health in all places
    Not targeted
  • 3. Develop an integrated EU soil monitoring system and track progress towards soil health
    Not targeted
  • 4. Engage with the soil user community and society at large
    Not targeted

Innovation hotspots

  • 1. Carbon farming
    Targeted
  • 2. Soil pollution and restoration
    Not targeted
  • 3. Soil biodiversity including the microbiome
    Targeted
  • 4. Circular economy solutions
    Not targeted

Cross-cutting dimensions

  • 1. Business
    Not targeted
  • 2. Digital
    Partially targeted
  • 3. Territorial
    Not targeted
  • 4. International
    Not targeted

© European Union, 2024. Image sources: Adobe.Stock.com