Incorporation of root C and fertilizer N into the food web of an arable field: Variations with functional group and energy channel

Scheunemann, Nicole; Pausch, Johanna; Digel, Christoph; Krämer, Susanne; Scharroba, Anika; Kuzyakov, Yakov; Kandeler, Ellen; Rueß, Liliane; Butenschoen, Olaf; Scheu, Stefan

doi:10.1016/j.fooweb.2016.02.006

Cited by 18 publications

(13 citation statements)

References 58 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Further, in food choice experiments it has been shown that Collembola feed on mycorrhizal fungi [ 50 ]. In line with these findings Collembola have been shown to rapidly incorporate root-derived C in field experiments [ 34 , 51 – 53 ], with high amounts being incorporated into Onychiuridae [ 36 , 37 ]. Also, the fast tissue turnover of Collembola likely contributed to the high incorporation of root-derived C in Onychiuridae, as previously suggested [ 34 ].…”

Section: Discussionsupporting

confidence: 55%

Root-derived carbon and nitrogen from beech and ash trees differentially fuel soil animal food webs of deciduous forests

et al. 2017

Self Cite

View full text Add to dashboard Cite

Evidence is increasing that soil animal food webs are fueled by root-derived carbon (C) and also by root-derived nitrogen (N). Functioning as link between the above- and belowground system, trees and their species identity are important drivers structuring soil animal communities. A pulse labeling experiment using 15N and 13C was conducted by exposing beech (Fagus sylvatica) and ash (Fraxinus excelsior) seedlings to 13CO2 enriched atmosphere and tree leaves to 15N ammonium chloride solution in a plant growth chamber under controlled conditions for 72 h. C and N fluxes into the soil animal food web of beech, associated with ectomycorrhizal fungi (EMF), and ash, associated with arbuscular mycorrhizal fungi (AMF), were investigated at two sampling dates (5 and 20 days after labeling). All of the soil animal taxa studied incorporated root-derived C, while root-derived N was only incorporated into certain taxa. Tree species identity strongly affected C and N incorporation with the incorporation in the beech rhizosphere generally exceeding that in the ash rhizosphere. Incorporation differed little between 5 and 20 days after labeling indicating that both C and N are incorporated quickly into soil animals and are used for tissue formation. Our results suggest that energy and nutrient fluxes in soil food webs depend on the identity of tree species with the differences being associated with different types of mycorrhiza. Further research is needed to prove the generality of these findings and to quantify the flux of plant C and N into soil food webs of forests and other terrestrial ecosystems.

show abstract

Section: Discussionsupporting

confidence: 55%

Root-derived carbon and nitrogen from beech and ash trees differentially fuel soil animal food webs of deciduous forests

et al. 2017

Self Cite

View full text Add to dashboard Cite

show abstract

“…Rhizodeposits and exudates are consumed by root-associated fungi and bacteria that are in turn grazed upon by protozoans and microbivorous metazoan animals (Inderjit and Weston 2003;Bonkowski et al 2009). Root carbon can therefore reach soil animals via both bacterial and fungal energy channels (Pollierer et al 2012;Scheunemann et al 2016). In addition, many saprophagous soil animals like earthworms can feed directly on live plant roots (Cortez and Bouche´1992;Gunn and Cherrett 1993).…”

Section: Introductionmentioning

confidence: 99%

Short‐term incorporation of freshly fixed plant carbon into the soil animal food web: field study in a spruce forest

Goncharov

Tsurikov

Potapov

et al. 2016

Ecological Research

View full text Add to dashboard Cite

We analyzed the dynamics of the short‐term incorporation of recently fixed carbon into the below‐ground food web in a boreal forest. Five young spruce trees (Picea abies) were pulse‐labeled with 13CO2 and the isotopic label was traced in soil invertebrates during 5 weeks. The freshly fixed plant carbon quickly entered both litter‐located and soil‐located compartments of the detrital food web. Among invertebrates inhabiting the mineral soil layers, a trophic link to the root‐derived C was most pronounced in species with higher δ15N values, suggesting this energy source to be more important in deeper mineral soil horizons. The label appeared faster in saprophagous animals than in predators (the median time lag after labeling was 6 and 12 days, respectively), but the difference was not significant. The label was recovered in 15 of 38 species of saprophagous animals and in 20 of 63 species of predators. Among saprophages, the frequency and intensity of the label was relatively high in endogeic collembolans and in bibionid larvae, but earthworms and enchytraeids were not labeled. Several groups of predators, lithobiid centipedes in particular, quickly acquired the root‐derived carbon, possibly indicating the feeding on live roots or mycorrhizal mycelium. In total, only 35 % of species or genera examined acquired the label. This suggests that majority of invertebrate taxa in the decomposer food web are unlikely to depend heavily on freshly fixed plant carbon provided by roots and root‐associated microorganisms.

show abstract

“…Soil food web modelling has mainly been used to calculate the flow of C and nutrients through soil and to investigate the role of the various functional groups in these flows ( Scheunemann et al, 2016 ; Malard et al, 2020 ). This kind of modelling requires knowledge about the architecture of the food web (“who eats who”), the biomass of the functional groups and physiological information, such as generation time, growth and death rates and metabolic efficiencies (see chapters above for details).…”

Section: Introductionmentioning

confidence: 99%

KEYLINK: towards a more integrative soil representation for inclusion in ecosystem scale models. I. review and model concept

Deckmyn

Flores

Mayer

et al. 2020

PeerJ

View full text Add to dashboard Cite

The relatively poor simulation of the below-ground processes is a severe drawback for many ecosystem models, especially when predicting responses to climate change and management. For a meaningful estimation of ecosystem production and the cycling of water, energy, nutrients and carbon, the integration of soil processes and the exchanges at the surface is crucial. It is increasingly recognized that soil biota play an important role in soil organic carbon and nutrient cycling, shaping soil structure and hydrological properties through their activity, and in water and nutrient uptake by plants through mycorrhizal processes. In this article, we review the main soil biological actors (microbiota, fauna and roots) and their effects on soil functioning. We review to what extent they have been included in soil models and propose which of them could be included in ecosystem models. We show that the model representation of the soil food web, the impact of soil ecosystem engineers on soil structure and the related effects on hydrology and soil organic matter (SOM) stabilization are key issues in improving ecosystem-scale soil representation in models. Finally, we describe a new core model concept (KEYLINK) that integrates insights from SOM models, structural models and food web models to simulate the living soil at an ecosystem scale.

show abstract

Incorporation of root C and fertilizer N into the food web of an arable field: Variations with functional group and energy channel

Cited by 18 publications

References 58 publications

Root-derived carbon and nitrogen from beech and ash trees differentially fuel soil animal food webs of deciduous forests

Root-derived carbon and nitrogen from beech and ash trees differentially fuel soil animal food webs of deciduous forests

Short‐term incorporation of freshly fixed plant carbon into the soil animal food web: field study in a spruce forest

KEYLINK: towards a more integrative soil representation for inclusion in ecosystem scale models. I. review and model concept

Contact Info

Product

Resources

About