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• W2892293810 abstract "Effects of changes in functional composition of soil communities on nutrient cycling are still not well understood. Models simulating community dynamics overcome the technical challenges of conducting species removal experiments in the field. However, to date, available soil food web models do not adequately represent the organic matter processing chain which is key for soil dynamics. Here, we present a new model of soil food web dynamics accounting for allometric scaling of metabolic rate, ontogeny of organic matter, and explicit representation of nitrogen and carbon flows. We use this model to investigate what traits are best predictors of species effects on community productivity and on nutrient cycling. To do so, we removed 161 tropho-species (groups of functionally identical species) one at a time from 48 forest soil food webs, and simulated their dynamics until equilibrium. Simulations revealed that combinations of traits better determine removal effects than single ones. The smallest species are the most competitive ones, but carnivores of various body masses presenting the highest connectivity and resource similarity could be key stone species in the regulation of competitive forces. Despite this, most removals had low effects, suggesting functional redundancy provides a high resistance of soil food webs to single tropho-species extinction. We also highlight for the first time that food web structure and soil fertility can drastically change species effects in an unpredictable way. Moreover, the exclusion of detritus and stoichiometric constraints in past studies lead to underestimations of indirect effects and retroactions. While additional work is needed to incorporate complementarity between detritivores, it is essential to take into account these mechanisms in models in order to improve the understanding of soil food web functioning." @default.
• W2892293810 created "2018-09-27" @default.
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• W2892293810 date "2018-09-10" @default.
• W2892293810 modified "2023-09-27" @default.
• W2892293810 title "Species traits and community properties explain species extinction effects on detritus-based food webs" @default.
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• W2892293810 hasPublicationYear "2018" @default.
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