Matches in SemOpenAlex for { <https://semopenalex.org/work/W4241092183> ?p ?o ?g. }
Showing items 1 to 82 of
82
with 100 items per page.
- W4241092183 abstract "Abstract. The distribution of organic substrates and microorganism in soils is spatially heterogeneous at the micro-scale. Most soil carbon cycling models do not account for this micro-scale heterogeneity, which may affect predictions of carbon (C) fluxes and stocks. In this study, we hypothesize that the mean respiration rate R at the soil-core scale (i) is affected by the micro-scale spatial heterogeneity of substrate and microbes and (ii) depends upon the degree of this heterogeneity. To assess theoretically the effect of spatial heterogeneities on R, we contrast highly heterogeneous conditions with isolated patches of substrate and microbes versus spatially homogeneous conditions equivalent to those assumed in most soil C models. Moreover, we distinguish between biophysical heterogeneity, defined as the non-uniform spatial distribution of substrate and microbes, and full heterogeneity, defined as the non-uniform spatial distribution of substrate quality (or accessibility) in addition to biophysical heterogeneity. Three commonly used formulations for decomposition kinetics (linear, multiplicative and Michaelis-Menten) are considered in a coupled substrate-microbial biomass model valid at the micro-scale. We start with a 2D domain characterized by a heterogeneous substrate distribution and numerically simulate organic matter dynamics at each cell in the domain. To interpret the mean behavior of this spatially-explicit system, we propose an analytical scale transition approach in which micro-scale heterogeneities affect R through the second order spatial moments (spatial variances and covariances). It was not possible to capture the mean behavior of the heterogeneous system when the model assumed spatial homogeneity, because the second order moments cause the heterogeneous system to deviate from the behavior attained under homogeneous conditions. Consequently, R in the heterogeneous system can be higher or lower than the respiration of the homogeneous system, depending on the sign of the second order spatial moments. This effect of the spatial heterogeneities appears in the upscaled nonlinear decomposition formulations, whereas the upscaled linear decomposition model deviates from homogeneous conditions only when substrate quality is heterogeneous. Thus, this study highlights the inadequacy of applying at the macro-scale the same decomposition formulations valid at the micro-scale, and proposes a scale transition approach as a way forward to capture micro-scale dynamics in core-scale models." @default.
- W4241092183 created "2022-05-12" @default.
- W4241092183 creator A5004930328 @default.
- W4241092183 creator A5014130236 @default.
- W4241092183 creator A5036229388 @default.
- W4241092183 creator A5054222977 @default.
- W4241092183 creator A5056436778 @default.
- W4241092183 creator A5066750010 @default.
- W4241092183 creator A5080758190 @default.
- W4241092183 date "2019-07-02" @default.
- W4241092183 modified "2023-10-18" @default.
- W4241092183 title "Dynamic upscaling of decomposition kinetics for carbon cycling models" @default.
- W4241092183 doi "https://doi.org/10.5194/gmd-2019-133" @default.
- W4241092183 hasPublicationYear "2019" @default.
- W4241092183 type Work @default.
- W4241092183 citedByCount "4" @default.
- W4241092183 countsByYear W42410921832020 @default.
- W4241092183 countsByYear W42410921832023 @default.
- W4241092183 crossrefType "posted-content" @default.
- W4241092183 hasAuthorship W4241092183A5004930328 @default.
- W4241092183 hasAuthorship W4241092183A5014130236 @default.
- W4241092183 hasAuthorship W4241092183A5036229388 @default.
- W4241092183 hasAuthorship W4241092183A5054222977 @default.
- W4241092183 hasAuthorship W4241092183A5056436778 @default.
- W4241092183 hasAuthorship W4241092183A5066750010 @default.
- W4241092183 hasAuthorship W4241092183A5080758190 @default.
- W4241092183 hasBestOaLocation W42410921831 @default.
- W4241092183 hasConcept C105795698 @default.
- W4241092183 hasConcept C121332964 @default.
- W4241092183 hasConcept C158709400 @default.
- W4241092183 hasConcept C159390177 @default.
- W4241092183 hasConcept C159750122 @default.
- W4241092183 hasConcept C180478619 @default.
- W4241092183 hasConcept C186060115 @default.
- W4241092183 hasConcept C18903297 @default.
- W4241092183 hasConcept C2777016058 @default.
- W4241092183 hasConcept C2777289219 @default.
- W4241092183 hasConcept C2778755073 @default.
- W4241092183 hasConcept C33923547 @default.
- W4241092183 hasConcept C39432304 @default.
- W4241092183 hasConcept C39464130 @default.
- W4241092183 hasConcept C62520636 @default.
- W4241092183 hasConcept C86803240 @default.
- W4241092183 hasConceptScore W4241092183C105795698 @default.
- W4241092183 hasConceptScore W4241092183C121332964 @default.
- W4241092183 hasConceptScore W4241092183C158709400 @default.
- W4241092183 hasConceptScore W4241092183C159390177 @default.
- W4241092183 hasConceptScore W4241092183C159750122 @default.
- W4241092183 hasConceptScore W4241092183C180478619 @default.
- W4241092183 hasConceptScore W4241092183C186060115 @default.
- W4241092183 hasConceptScore W4241092183C18903297 @default.
- W4241092183 hasConceptScore W4241092183C2777016058 @default.
- W4241092183 hasConceptScore W4241092183C2777289219 @default.
- W4241092183 hasConceptScore W4241092183C2778755073 @default.
- W4241092183 hasConceptScore W4241092183C33923547 @default.
- W4241092183 hasConceptScore W4241092183C39432304 @default.
- W4241092183 hasConceptScore W4241092183C39464130 @default.
- W4241092183 hasConceptScore W4241092183C62520636 @default.
- W4241092183 hasConceptScore W4241092183C86803240 @default.
- W4241092183 hasFunder F4320321033 @default.
- W4241092183 hasFunder F4320322581 @default.
- W4241092183 hasLocation W42410921831 @default.
- W4241092183 hasLocation W42410921832 @default.
- W4241092183 hasLocation W42410921833 @default.
- W4241092183 hasLocation W42410921834 @default.
- W4241092183 hasLocation W42410921835 @default.
- W4241092183 hasLocation W42410921836 @default.
- W4241092183 hasOpenAccess W4241092183 @default.
- W4241092183 hasPrimaryLocation W42410921831 @default.
- W4241092183 hasRelatedWork W2354015993 @default.
- W4241092183 hasRelatedWork W2359246110 @default.
- W4241092183 hasRelatedWork W2371428959 @default.
- W4241092183 hasRelatedWork W2372925641 @default.
- W4241092183 hasRelatedWork W2378614147 @default.
- W4241092183 hasRelatedWork W2382777282 @default.
- W4241092183 hasRelatedWork W2385570549 @default.
- W4241092183 hasRelatedWork W4241092183 @default.
- W4241092183 hasRelatedWork W4287958829 @default.
- W4241092183 hasRelatedWork W4367680091 @default.
- W4241092183 isParatext "false" @default.
- W4241092183 isRetracted "false" @default.
- W4241092183 workType "article" @default.