Publication Details |
| Category | Text Publication |
| Reference Category | Journals |
| DOI | 10.1016/j.soilbio.2024.109575 |
Licence  |
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| Title (Primary) | Under the lens: Carbon and energy channels in the soil micro-food web |
| Author | van Bommel, M.; Arndt, K.; Endress, M.-G.; Dehghani, F.
; Wirsching, J.; Blagodatskaya, E.; Blagodatsky, S.; Kandeler, E.; Marhan, S.; Poll, C.; Ruess, L. |
| Source Titel | Soil Biology & Biochemistry |
| Year | 2024 |
| Department | BOOEK |
| Volume | 199 |
| Page From | art. 109575 |
| Language | englisch |
| Topic | T5 Future Landscapes |
| Supplements | https://ars.els-cdn.com/content/image/1-s2.0-S0038071724002645-mmc1.docx https://ars.els-cdn.com/content/image/1-s2.0-S0038071724002645-mmc2.docx https://ars.els-cdn.com/content/image/1-s2.0-S0038071724002645-mmc3.docx https://ars.els-cdn.com/content/image/1-s2.0-S0038071724002645-mmc4.docx |
| Keywords | Arable systems; Fertilization; Decomposition channels; Nematode indices; Metabolic footprints; Carbon flow; Energy flow |
| Abstract | While
carbon flow through soil decomposition channels is well studied, the
associated energy fluxes are less considered. In particular, how
microbial substrate and energy turnover are linked to higher trophic
levels has hardly been investigated to date. Soil nematode communities
can serve as a model group to address this knowledge gap. As important
microbial grazers nematodes hold a central position in soil food webs.
The present study relates the structure and function of the micro-food
web to microbial carbon and energy use efficiency. Microbial biomass
(phospholipid fatty acids), activity (substrate-induced growth) and
energy flow (substrate-induced heat release) are linked with the
nematode fauna, i.e. population density, ecological indices and
metabolic footprints. Soils from four agricultural sites in central
Europe were compared, either long-term unfertilized or fertilized with
farmyard manure. Environmental conditions (e.g. soil nutrients, moisture) influenced microbial biomass, nematode population density and decomposition channels more than fertilization. While all arable soils were dominated by bacteria, at sites with moderate nutrient status fungi also contributed to carbon and energy flow. The life strategies of microorganisms and nematodes showed a comparable pattern: nutrient-poor unfertilized soils comprised more K-strategists, characterized by an efficient but slow metabolism. Conversely, nutrient-rich soils represented fast cycle systems, dominated by copiotrophic microorganisms and strong r-strategists among nematodes. Across soils, microbial energy use efficiency was quite balanced compared to carbon use efficiency. Remarkably, nematode functional groups were closely linked to microbial substrate turnover efficiency, suggesting nematode faunal analysis as a useful proxy. The nematode Channel Index, a measure for soil decomposition channel activity, is proposed as a tool for mapping microbial carbon and energy turnover. |
| Persistent UFZ Identifier | https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=30030 |
| van Bommel, M., Arndt, K., Endress, M.-G., Dehghani, F., Wirsching, J., Blagodatskaya, E., Blagodatsky, S., Kandeler, E., Marhan, S., Poll, C., Ruess, L. (2024): Under the lens: Carbon and energy channels in the soil micro-food web Soil Biol. Biochem. 199 , art. 109575 10.1016/j.soilbio.2024.109575 |
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