Journal ArticleDOI
Nitrogen mineralization: challenges of a changing paradigm
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TLDR
A complete new conceptual model of the soil N cycle needs to incorporate recent research on plant–microbe competition and microsite processes to explain the dynamics of N across the wide range of N availability found in terrestrial ecosystems.Abstract:
Until recently, the common view of the terrestrial nitrogen cycle had been driven by two core assumptions—plants use only inorganic N and they compete poorly against soil microbes for N. Thus, plants were thought to use N that microbes “left over,” allowing the N cycle to be divided cleanly into two pieces—the microbial decomposition side and the plant uptake and use side. These were linked by the process of net mineralization. Over the last decade, research has changed these views. N cycling is now seen as being driven by the depolymerization of N-containing polymers by microbial (including mycorrhizal) extracellular enzymes. This releases organic N-containing monomers that may be used by either plants or microbes. However, a complete new conceptual model of the soil N cycle needs to incorporate recent research on plant–microbe competition and microsite processes to explain the dynamics of N across the wide range of N availability found in terrestrial ecosystems. We discuss the evolution of thinking abou...read more
Citations
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Nutrient pulses after prescribed winter fires and preferential patterns of N uptake may contribute to the expansion of Brachypodium pinnatum (L.) P. Beauv. in highland grasslands
TL;DR: Control winter burnings, despite being low intensity, cause a significant release of the main nutrients associated with plant growth, which makes the plant community more susceptible to floristic changes.
Journal ArticleDOI
Consequences of elevated temperatures on legume biomass and nitrogen cycling in a field warming and biodiversity experiment in a North American prairie
TL;DR: The results suggest that legume-mediated effects of temperature on N cycling will arise from changes in biomass and tissue chemistry, not N2 fixation, suggesting that these may be more responsive to precipitation changes than elevated temperature.
Journal ArticleDOI
The contribution of successional grasslands to the conservation of semi-natural grasslands species – A landscape perspective
TL;DR: In this paper, the authors used a space-for-time approach to analyse changes in the frequencies of typical grassland species, and changes in soil properties, over a 280-year arable-to-grassland succession within a Swedish landscape.
Journal ArticleDOI
Structural equation modeling reveals iron (hydr)oxides as a strong mediator of N mineralization in California agricultural soils
TL;DR: In this paper, a high degree of multicollinearity existed between many of the physiochemical parameters of the human body's physiological parameters and was found to be the case for most of the physiological parameters.
Journal ArticleDOI
The carbon economy of drought: comparing respiration responses of roots, mycorrhizal fungi, and free-living microbes to an extreme dry-rewet cycle
Cari D. Ficken,Jeffrey M. Warren +1 more
TL;DR: In this article, the effects of drying and wetting on soil carbon processes are regulated by the responses of plants, plant-associated microbes, and free-living microbes in the soil.
References
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Journal ArticleDOI
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TL;DR: Quality Control and Quality Assurance in Applied Soil Microbiology and Biochemistry in applied soil microbiology and biochemistry and field methods.