Latitude, Elevation, and Mean Annual Temperature Predict Peat Organic Matter Chemistry at a Global Scale

Verbeke, Brittany A.; Lamit, Louis J.; Lilleskov, Erik A.; Hodgkins, Suzanne B.; Basiliko, Nathan; Kane, Evan S.; Andersen, Roxane; Artz, Rebekka E.; Benavides, Juan C.; Benscoter, Brian W.; Borken, Werner; Bragazza, Luca; Brandt, Stefani M.; Bräuer, Suzanna L.; Carson, Michael A.; Charman, Dan; Chen, Xin; Clarkson, Beverley R.; Cobb, Alexander R.; Convey, Peter; Pasquel, Jhon Águila; Enriquez, Andrea S.; Griffiths, Howard; Grover, Samantha P.; Harvey, Charles F.; Harris, Lorna I.; Hazard, Christina; Hodgson, Dominic; Hoyt, Alison M.; Hribljan, John; Jauhiainen, Jyrki; Juutinen, Sari; Knorr, Klaus‐Holger; Kolka, Randall K.; Könönen, Mari; Larmola, Tuula; McCalley, Carmody K.; McLaughlin, James; Moore, Tim R.; Mykytczuk, Nadia; Normand, Anna E.; Rich, Virginia; Roulet, Nigel; Royles, Jessica; Rutherford, Jasmine; Smith, David S.; Svenning, Mette M.; Tedersoo, Leho; Thu, Pham Q.; Trettin, Carl C.; Tuittila, Eeva‐Stiina; Urbanová, Zuzana; Varner, Ruth K.; Wang, Meng; Wang, Zheng; Warren, Matt; Wiedermann, Magdalena M.; Williams, Shanay; Yavitt, Joseph B.; Yu, Zhi‐Guo; Yu, Zicheng; Chanton, Jeffrey P.

doi:10.1029/2021gb007057

Title: Latitude, Elevation, and Mean Annual Temperature Predict Peat Organic Matter Chemistry at a Global Scale

Journal Article · 27 January 2022 · Global Biogeochemical Cycles

DOI: https://doi.org/10.1029/2021gb007057 · OSTI ID:1978511

^[1]; Lamit, Louis J. ^[2];

^[3];

^[4]; Basiliko, Nathan ^[5];

^[6]; Andersen, Roxane ^[7];

^[8]; Benavides, Juan C. ^[9];

^[10]; Borken, Werner ^[11];

^[12]; Brandt, Stefani M. ^[13];

^[14];

^[5]; Charman, Dan ^[15]; Chen, Xin ^[16]; Clarkson, Beverley R. ^[17];

^[18];

^[19] more »

Florida State Univ., Tallahassee, FL (United States); OSTI
State Univ. of New York (SUNY), Syracuse, NY (United States)
USDA Forest Service, Houghton, MI (United States)
Florida State Univ., Tallahassee, FL (United States); The Ohio State Univ., Columbus, OH (United States)
Laurentian Univ., Sudbury, ON (Canada)
USDA Forest Service, Houghton, MI (United States); Michigan Technological Univ., Houghton, MI (United States)
University of the Highlands and Islands (United Kingdom)
James Hutton Institute, Craigiebuckler, Aberdeen (United Kindgom)
Pontificia Universidad Javeriana (Colombia)
Florida Atlantic Univ., Boca Raton, FL (United States); US Department of Energy (USDOE), Washington, DC (United States). Office of Science, Biological and Environmental Research (BER)
Univ. of Bayreuth (Germany)
Agroscope (Switzerland). Plant-Production Systems
Humboldt State Univ., Arcata, CA (United States)
Appalachian State University, Boone, NC (United States)
Univ. of Exeter, Devon (United Kingdom)
Zhejiang Univ., Hangzhou (China)
Landcare Research (New Zealand)
Singapore-MIT Alliance for Research and Technology (Singapore)
British Antarctic Survey, Cambridge (United Kingdom)
Universidad Nacional de la Amazonia Peruana (Peru); Instituto de Investigaciones de la Amazonía Peruana (Peru)
Instituto de Investigaciones Forestales y Agropecuarias (CONICET‐INTA) (Argentina)
Univ. of Cambridge (United Kingdom)
Univ. of Melbourne, VIC (Australia)
Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States); Singapore-MIT Alliance for Research and Technology, Cambridge, MA (United States)
Univ. of Alberta, Edmonton, AB (Canada); McGill Univ., Montreal, QC (Canada)
Univ. of Lyon (France)
Max Planck Institute for Biogeochemistry, Jena (Germany)
Univ. of Nebraska, Omaha, NE (United States)
Univ. of Helsinki (Finland); Natural Resources Institute (Finland)
Univ. of Helsinki (Finland)
University of Muenster (Germany)
USDA Forest Service, Grand Rapids, MN (United States)
Univ. of Helsinki (Finland); University of Eastern Finland (Finland)
Natural Resources Institute (Finland)
Rochester Inst. of Technology, NY (United States)
Ontario Forest Research Institute (Canada)
McGill Univ., Montreal, QC (Canada)
Univ. of Florida, Gainesville, FL (United States)
The Ohio State Univ., Columbus, OH (United States)
Department of Biodiversity, Conservation and Attractions (Australia)
California State University, San Bernardino (CSUSB), CA (United States)
UiT The Arctic Univ. of Norway, Tromso (Norway)
University of Tartu (Estonia); King Saud Univ., Riyadh (Saudi Arabia)
Vietnamese Academy of Forest Sciences (Vietnam)
USDA Forest Service, Cordesville, SC (United States). Southern Research Station
Univ. of Eastern Finland, Kuopio (Finland)
University of South Bohemia České Budějovice (Czech Republic)
Univ. of New Hampshire, Durham, NH (United States)
Northeast Normal University (China)
Hebei Agricultural University (HEBAU) (China)
Earth Innovation Institute, San Francisco, CA (United States)
Univ. of Cincinnati, OH (United States)
University of Saskatchewan (Canada)
Cornell Univ., Ithaca, NY (United States)
Nanjing Univ. of Information Science and Technology (China)
Lehigh Univ., Bethlehem, PA (United States); Northeast Normal University (China)
Florida State Univ., Tallahassee, FL (United States)

Peatlands contain a significant fraction of global soil carbon, but how these reservoirs will respond to the changing climate is still relatively unknown. A global picture of the variations in peat organic matter chemistry will aid our ability to gauge peatland soil response to climate. Here, the goal of this research is to test the hypotheses that (a) peat carbohydrate content, an indicator of soil organic matter reactivity, will increase with latitude and decrease with mean annual temperatures, (b) while peat aromatic content, an indicator of recalcitrance, will vary inversely, and (c) elevation will have a similar effect to latitude. We used Fourier Transform Infrared Spectroscopy to examine variations in the organic matter functional groups of 1034 peat samples collected from 10 to 20, 30–40, and 60–70 cm depths at 165 individual sites across a latitudinal gradient of 79°N–65°S and from elevations of 0–4,773 m. Carbohydrate contents of high latitude peat were significantly greater than peat originating near the equator, while aromatic content showed the opposite trend. For peat from similar latitudes but different elevations, the carbohydrate content was greater and aromatic content was lower at higher elevations. Higher carbohydrate content at higher latitudes indicates a greater potential for mineralization, whereas the chemical composition of low latitude peat is consistent with their apparent relative stability in the face of warmer temperatures. The combination of low carbohydrates and high aromatics at warmer locations near the equator suggests the mineralization of high latitude peat until reaching recalcitrance under a new temperature regime.

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Research Organization:: Georgia Institute of Technology, Atlanta, GA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Biological and Environmental Research (BER); National Science Foundation (NSF)

Grant/Contract Number:: SC0007144; SC0012088

OSTI ID:: 1978511

Journal Information:: Global Biogeochemical Cycles, Journal Name: Global Biogeochemical Cycles Journal Issue: 2 Vol. 36; ISSN 0886-6236

Publisher:: American Geophysical Union (AGU)Copyright Statement

Country of Publication:: United States

Language:: English

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Related Subjects

54 ENVIRONMENTAL SCIENCES
Fourier Transform Infrared Spectroscopy (FTIR)
aromatics
carbohydrate
carbon cycling
geochemical cycles
o-alkyl carbon
organic and biogenic geochemistry
peatlands
soil carbon
soils
wetlands

Title: Latitude, Elevation, and Mean Annual Temperature Predict Peat Organic Matter Chemistry at a Global Scale

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