Ecosystem

Soil water

Archaeology

Plea

Ecosystem services

Biology

Environmental chemistry

Mineralization (soil science)

Soil health

Political science

Soil science

Geography

Soil organic matter

Chemistry

Ecology

Soil quality

Context (archaeology)

Environmental science

Organic matter

Plant and Soil

Background Soil organic matter (SOM) supports multiple soil ecosystem functions, underpinned by processes such as C sequestration, N mineralization, aggregation, promotion of plant health and compound retention. We know little about the relationship between these functions and SOM quality. Scope We aimed to develop “eco-functionality” as a framework to address questions on the relation between SOM properties and soil ecosystem functions. Conclusions Paradigm shifts in SOM research have not led to metrics for eco-functionality beyond decomposability and C:N ratio. Recalcitrant OM is under-researched despite its essential role in aggregation and C sequestration, especially in C-saturated soils. Most soil functions are dependent on SOM decomposition and require labile compounds. We conclude that eco-functionality is context-dependent and needs to take time scales into account. We plea for attempts to link operationally defined SOM fractions to functions in order to make SOM research more applicable.

Eco-functionality of organic matter in soils