Sticky Dead Microbes : rapid abiotic retention of microbial necromass in soil

Buckeridge, Kate and La Rosa, Alfio Fabio and Mason, Kelly and Whitaker, Jeanette and McNamara, Niall and Grant, Helen and Ostle, Nick (2020) Sticky Dead Microbes : rapid abiotic retention of microbial necromass in soil. Soil Biology and Biochemistry, 149: 107929. ISSN 0038-0717

[thumbnail of 20200710_Sticky Dead Microbes_AAM]
Text (20200710_Sticky Dead Microbes_AAM)
20200710_Sticky_Dead_Microbes_AAM.pdf - Accepted Version
Available under License Creative Commons Attribution-NonCommercial-NoDerivs.

Download (661kB)


Microbial necromass dominates soil organic matter. Recent research on necromass and soil carbon storage has focused on necromass production and stabilization mechanisms but not on the mechanisms of necromass retention. We present evidence from soil incubations with stable-isotope labeled necromass that abiotic adsorption may be more important than biotic immobilization for short-term necromass retention. We demonstrate that necromass adsorbs not only to mineral surfaces, but may also interact with other necromass. Furthermore, necromass cell chemistry alters necromass-necromass interaction, with more bacterial tracer retained when there is yeast necromass present. These findings suggest that the adsorption and abiotic interaction of microbial necromass and its functional properties, beyond chemical stability, deserve further investigation in the context of soil carbon sequestration.

Item Type:
Journal Article
Journal or Publication Title:
Soil Biology and Biochemistry
Uncontrolled Keywords:
?? soil organic matterfunctional propertiesstable isotopegrassland pasturecarbon sequestrationnitrogensoil sciencemicrobiology ??
ID Code:
Deposited By:
Deposited On:
28 Jul 2020 10:55
Last Modified:
07 Jun 2024 09:37