OPENAIRE OpenAire Sygma PURE Aarhus University Crossref Microsoft Academic Graph European Union Open Data Portal https://onlinelibrary.wiley.com/doi/pdf/10.1002/ldr.3656 https://doi.org/10.1002/ldr.3656 Land Degradation &amp; Development Restricted 2020-06-07 Abstract<p>Quantifying the effects of grazing on soil organic carbon (SOC) decomposition is of crucial importance for understanding soil C dynamics. However, less attention has been paid to the pool￢ﾀﾐspecific SOC decomposition and the underlying factors associated with each C pool, representing critical knowledge gaps on soil C dynamics. In this study, we applied a state￢ﾀﾐof￢ﾀﾐthe￢ﾀﾐart Bayesian data assimilation technique to re￢ﾀﾐanalyze previous soil incubation data to examine how herbivores influenced the fraction and cumulative respiration of labile and recalcitrant soil C pools from seven edaphically diverse sites in Yellowstone National Park, whereas those variables were not explored in the earlier study. Our results showed that grazing significantly increased cumulative respiration from both labile and recalcitrant C pools. Greater cumulative respiration from the labile C pool was related to grazers increasing labile C pool fractions, while higher cumulative respiration from the recalcitrant C pool was associated with grazers accelerating the decomposition rate of the recalcitrant C pool. Cumulative respiration from both labile and recalcitrant C pools was positively correlated with shoot biomass, soil gravimetric moisture, and soil C and nitrogen content. Our results underscore how knowledge of pool￢ﾀﾐspecific SOC decomposition can provide a better mechanistic understanding of soil C dynamics along topo￢ﾀﾐedaphic gradients in grazed grassland.</p 2. Zero hunger decomposition recalcitrant carbon pool 0401 agriculture, forestry, and fisheries soil incubation | microorganisms 04 agricultural and veterinary sciences herbivores grazing plant productivity 15. Life on land data assimilation labile carbon pool Chen, Ji, Frank, Douglas A., 2020-06-07 journalpaper Abstract<p>Quantifying the effects of grazing on soil organic carbon (SOC) decomposition is of crucial importance for understanding soil C dynamics. However, less attention has been paid to the pool￢ﾀﾐspecific SOC decomposition and the underlying factors associated with each C pool, representing critical knowledge gaps on soil C dynamics. In this study, we applied a state￢ﾀﾐof￢ﾀﾐthe￢ﾀﾐart Bayesian data assimilation technique to re￢ﾀﾐanalyze previous soil incubation data to examine how herbivores influenced the fraction and cumulative respiration of labile and recalcitrant soil C pools from seven edaphically diverse sites in Yellowstone National Park, whereas those variables were not explored in the earlier study. Our results showed that grazing significantly increased cumulative respiration from both labile and recalcitrant C pools. Greater cumulative respiration from the labile C pool was related to grazers increasing labile C pool fractions, while higher cumulative respiration from the recalcitrant C pool was associated with grazers accelerating the decomposition rate of the recalcitrant C pool. Cumulative respiration from both labile and recalcitrant C pools was positively correlated with shoot biomass, soil gravimetric moisture, and soil C and nitrogen content. Our results underscore how knowledge of pool￢ﾀﾐspecific SOC decomposition can provide a better mechanistic understanding of soil C dynamics along topo￢ﾀﾐedaphic gradients in grazed grassland.</p Herbivores stimulate respiration from labile and recalcitrant soil carbon pools in grasslands of Yellowstone National Park 10.1002/ldr.3656 839806