Variation in carbon and nitrogen concentrations among peatland categories at the global scale

• Autores: Watmough, Shaun; Gilbert Parkes, Spencer; Basiliko, Nathan; Lamit, Louis J.; Lilleskov, Erik A.; Andersen, Roxanne; del Aguila-Pasquel, Jhon; Artz, Rebekka E.; Benscoter, Brian W.; Borken, Werner; Bragazza, Luca; Brandt, Stefani M.; Bräuer, Suzanna L.; Carson, Michael A.; Chen, Xin; Chimner, Rodney A.; Clarkson, Bev R.; Cobb, Alexander R.; Enriquez, Andrea Soledad; Farmer, Jenny; Grover, Samantha P.; Harvey, Charles F.; Harris, Lorna I.; Hazard, Christina; Hoyt, Alison M.; Hribljan, John; Jauhiainen, Jyrki; Juutinen, Sari; Kane, Evan S.; Knorr, Klaus Holger
• Año de publicación: 2022
• Idioma: inglés
• Tipo de recurso: artículo
• Materia: SOIL CARBON CONCENTRATION; NITROGEN CARBON CONCENTRATION; PEATLANDS; GLOBAL FACTORS
• Institución: Consejo Nacional de Investigaciones Científicas y Técnicas

Peatlands account for 15 to 30% of the world's soil carbon (C) stock and are important controls over global nitrogen (N) cycles. However, C and N concentrations are known to vary among peatlands contributing to the uncertainty of global C inventories, but there are few global studies that relate peatland classification to peat chemistry. We analyzed 436 peat cores sampled in 24 countries across six continents and measured C, N, and organic matter (OM) content at three depths down to 70 cm. Sites were distinguished between northern (387) and tropical (49) peatlands and assigned to one of six distinct broadly recognized peatland categories that vary primarily along a pH gradient. Peat C and N concentrations, OM content, and C:N ratios differed significantly among peatland categories, but few differences in chemistry with depth were found within each category. Across all peatlands C and N concentrations in the 10-20 cm layer, were 440 ± 85.1 g kg-1 and 13.9 ± 7.4 g kg-1, with an average C:N ratio of 30.1 ± 20.8. Among peatland categories, median C concentrations were highest in bogs, poor fens and tropical swamps (446-532 g kg-1) and lowest in intermediate and extremely rich fens (375-414 g kg-1). The C:OM ratio in peat was similar across most peatland categories, except in deeper samples from ombrotrophic tropical peat swamps that were higher than other peatlands categories. Peat N concentrations and C:N ratios varied approximately two-fold among peatland categories and N concentrations tended to be higher (and C:N lower) in intermediate fens compared with other peatland types. This study reports on a unique data set and demonstrates that differences in peat C and OM concentrations among broadly classified peatland categories are predictable, which can aid future studies that use land cover assessments to refine global peatland C and N stocks.
Fil: Watmough, Shaun. Trent University (trent University);
Fil: Gilbert Parkes, Spencer. Trent University (trent University);
Fil: Basiliko, Nathan. Laurentian University; Canadá
Fil: Lamit, Louis J.. Syracuse University; Estados Unidos
Fil: Lilleskov, Erik A.. Usda Forest Service; Estados Unidos
Fil: Andersen, Roxanne. University of the Highlands and Islands; Reino Unido
Fil: del Aguila-Pasquel, Jhon. Instituto de Investigaciones de la Amazonía Peruana; Perú
Fil: Artz, Rebekka E.. The James Hutton Institute; Reino Unido
Fil: Benscoter, Brian W.. Florida Atlantic University; Estados Unidos
Fil: Borken, Werner. University of Bayreuth; Alemania
Fil: Bragazza, Luca. Università di Ferrara; Italia
Fil: Brandt, Stefani M.. Arcasa; Estados Unidos
Fil: Bräuer, Suzanna L.. Appalachian State University; Estados Unidos
Fil: Carson, Michael A.. Laurentian University; Canadá
Fil: Chen, Xin. Zhejiang University; China
Fil: Chimner, Rodney A.. Syracuse University; Estados Unidos
Fil: Clarkson, Bev R.. Landcare Research; Nueva Zelanda
Fil: Cobb, Alexander R.. Singapore-mit Alliance For Research And Technology; Singapur
Fil: Enriquez, Andrea Soledad. Instituto Nacional de Tecnología Agropecuaria. Centro Regional Patagonia Norte. Estación Experimental Agropecuaria San Carlos de Bariloche. Instituto de Investigaciones Forestales y Agropecuarias Bariloche. - Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto de Investigaciones Forestales y Agropecuarias Bariloche; Argentina
Fil: Farmer, Jenny. University of Newcastle; Reino Unido
Fil: Grover, Samantha P.. Royal Melbourne Institute of Technology. School of Science; Australia
Fil: Harvey, Charles F.. Singapore-mit Alliance For Research And Technology; Singapur
Fil: Harris, Lorna I.. University of Alberta; Canadá
Fil: Hazard, Christina. Université Claude Bernard Lyon 1; Francia
Fil: Hoyt, Alison M.. Massachusetts Institute of Technology; Estados Unidos
Fil: Hribljan, John. University of Nebraska; Estados Unidos
Fil: Jauhiainen, Jyrki. University of Helsinki; Finlandia
Fil: Juutinen, Sari. University of Helsinki; Finlandia
Fil: Kane, Evan S.. Syracuse University; Estados Unidos
Fil: Knorr, Klaus Holger. Westfälische Wilhelms Universität; Alemania