Changes in soil carbon mineralization related to earthworm activity depend on the time since inoculation and their density in soil - Archive ouverte HAL Access content directly
Journal Articles Scientific Reports Year : 2022

Changes in soil carbon mineralization related to earthworm activity depend on the time since inoculation and their density in soil

(1) , (2) , (3) , (4)
1
2
3
4

Abstract

Earthworms play a key role in soil carbon mineralization, but their effect is highly uncertain and suspected to vary as a function of several factors, particularly the earthworm density and time from earthworm inoculation. We conducted a meta-analysis considering these factors based on 42 experiments comparing carbon mineralization in the absence and presence of earthworms at different times. The results reveal an average carbon mineralization increase of 24% (sd 41%) in the presence of earthworms with an initial median earthworm density of 1.95 mg/g soil DM (Dry Mass) (sd 48%). We show that carbon mineralization due to earthworms was related to their density and time from inoculation. From a simple regression model using these two variables, the estimated impact of earthworms on carbon mineralization was 20% increase from 0 to 60 days and 14% decrease at day 350 for a density of worms commonly found in soils (0.5 mg/g soil DM). Finally, we proposed a simple equation that could be used in organic matter decomposition models that do not take macrofauna into account.
Fichier principal
Vignette du fichier
Garnier-SR-2022-CC-BY.pdf (2.47 Mo) Télécharger le fichier
Origin : Files produced by the author(s)

Dates and versions

hal-03749765 , version 1 (11-08-2022)

Identifiers

Cite

Patricia Garnier, David Makowski, Mickael Hedde, Michel Bertrand. Changes in soil carbon mineralization related to earthworm activity depend on the time since inoculation and their density in soil. Scientific Reports, 2022, 12 (1), pp.13616. ⟨10.1038/s41598-022-17855-z⟩. ⟨hal-03749765⟩
86 View
3 Download

Altmetric

Share

Gmail Facebook Twitter LinkedIn More