Convergence of soil nitrogen isotopes across global climate gradients
Copyright policy )Convergence of soil nitrogen isotopes across global climate gradients
AbstractQuantifying global patterns of terrestrial nitrogen (N) cycling is central to predicting future patterns of primary productivity, carbon sequestration, nutrient fluxes to aquatic systems and climate forcing. With limited direct measures of soil N cycling at the global scale, syntheses of the 15N:14N ratio of soil organic matter across climate gradients provide key insights into understanding global patterns of N cycling. In synthesizing data from over 6000 soil samples, we show strong global relationships among soil N isotopes, mean annual temperature (MAT), mean annual precipitation (MAP) and the concentrations of organic carbon and clay in soil. In both hot ecosystems and dry ecosystems, soil organic matter was more enriched in 15N than in corresponding cold ecosystems or wet ecosystems. Below a MAT of 9.8°C, soil δ15N was invariant with MAT. At the global scale, soil organic C concentrations also declined with increasing MAT and decreasing MAP. After standardizing for variation among mineral soils in soil C and clay concentrations, soil δ15N showed no consistent trends across global climate and latitudinal gradients. Our analyses could place new constraints on interpretations of patterns of ecosystem N cycling and global budgets of gaseous N loss.
- University of Copenhagen Denmark
- National Scientific and Technical Research Council Argentina
- National Institute of Amazonian Research Brazil
- University of Brasília Brazil
- United States Department of the Interior United States
550, TROPICAL FORESTS, Organic chemistry, Suelo, Nutrient cycle, Agricultural and Biological Sciences, Soil water, SDG 13 - Climate Action, Climate change, croisement de données, Milieux et Changements globaux, Global change, SDG 15 - Life on Land, Geography, Nutrient Cycling, FRACTIONATION, ECOSYSTEM ECOLOGY, Life Sciences, Forestry, Carbon cycle, Nitrogen Cycle, Organic-Matter, Earth and Planetary Sciences, Physical Sciences, Science & Technology - Other Topics, Stable Isotope Analysis of Groundwater and Precipitation, 570, STABLE ISOTOPE, Biogeochemical Cycling of Nutrients in Aquatic Ecosystems, Stable isotope analysis, Nitrogen, [SDE.MCG]Environmental Sciences/Global Changes, Soil Science, stable isotope analysis;ecosystem ecology, Article, Environmental science, Geochemistry and Petrology, stable isotope analysis, Carbono, Biology, Ecosystem, Soil science, Soil organic matter, Science & Technology, Soil Fertility, climat, Carbon, Inorganic, [SDE.MCG] Environmental Sciences/Global Changes, FOS: Biological sciences, Environmental Science, Soil Carbon Dynamics and Nutrient Cycling in Ecosystems, N-15 Natural-Abundance, Nitrogen cycle, cycle de l'azote, CARBON, Soil, Terrestrial ecosystem, Isotopes, https://purl.org/becyt/ford/1.6, N-15 NATURAL-ABUNDANCE, SDG 15 – Leben an Land, 106022 Mikrobiologie, Climatic Factors, Tropical Forests, Ecology, Nitrógeno, Litter Decomposition, ecosystem ecology, Cycling, Isótopos, Soil carbon, Multidisciplinary Sciences, ORGANIC-MATTER, Chemistry, PRECIPITATION, SDG 13 – Maßnahmen zum Klimaschutz, 106022 Microbiology, carbone du sol, Ecosystem Functioning, LITTER DECOMPOSITION, sol minéral, INORGANIC NITROGEN, Environmental Chemistry, Factores Climáticos, https://purl.org/becyt/ford/1, AVAILABILITY, Nitrogen Dynamics, NITROGEN, MODEL, PATTERNS
550, TROPICAL FORESTS, Organic chemistry, Suelo, Nutrient cycle, Agricultural and Biological Sciences, Soil water, SDG 13 - Climate Action, Climate change, croisement de données, Milieux et Changements globaux, Global change, SDG 15 - Life on Land, Geography, Nutrient Cycling, FRACTIONATION, ECOSYSTEM ECOLOGY, Life Sciences, Forestry, Carbon cycle, Nitrogen Cycle, Organic-Matter, Earth and Planetary Sciences, Physical Sciences, Science & Technology - Other Topics, Stable Isotope Analysis of Groundwater and Precipitation, 570, STABLE ISOTOPE, Biogeochemical Cycling of Nutrients in Aquatic Ecosystems, Stable isotope analysis, Nitrogen, [SDE.MCG]Environmental Sciences/Global Changes, Soil Science, stable isotope analysis;ecosystem ecology, Article, Environmental science, Geochemistry and Petrology, stable isotope analysis, Carbono, Biology, Ecosystem, Soil science, Soil organic matter, Science & Technology, Soil Fertility, climat, Carbon, Inorganic, [SDE.MCG] Environmental Sciences/Global Changes, FOS: Biological sciences, Environmental Science, Soil Carbon Dynamics and Nutrient Cycling in Ecosystems, N-15 Natural-Abundance, Nitrogen cycle, cycle de l'azote, CARBON, Soil, Terrestrial ecosystem, Isotopes, https://purl.org/becyt/ford/1.6, N-15 NATURAL-ABUNDANCE, SDG 15 – Leben an Land, 106022 Mikrobiologie, Climatic Factors, Tropical Forests, Ecology, Nitrógeno, Litter Decomposition, ecosystem ecology, Cycling, Isótopos, Soil carbon, Multidisciplinary Sciences, ORGANIC-MATTER, Chemistry, PRECIPITATION, SDG 13 – Maßnahmen zum Klimaschutz, 106022 Microbiology, carbone du sol, Ecosystem Functioning, LITTER DECOMPOSITION, sol minéral, INORGANIC NITROGEN, Environmental Chemistry, Factores Climáticos, https://purl.org/becyt/ford/1, AVAILABILITY, Nitrogen Dynamics, NITROGEN, MODEL, PATTERNS
