Suzanne B. Hodgkins, Curtis J. Richardson, René Dommain, Hongjun Wang, Paul H. Glaser, Brittany Verbeke, B. Rose Winkler, Alexander R. Cobb, Virginia I. Rich, Malak Missilmani, Neal Flanagan, Mengchi Ho, Alison M. Hoyt, Charles F. Harvey, S. Rose Vining, Moira A. Hough, Tim R. Moore, Pierre J. H. Richard, Florentino B. De La Cruz, Joumana Toufaily, Rasha Hamdan, William T. Cooper, Jeffrey P. Chanton
- Peatlands represent large terrestrial carbon banks. Given that most peat accumulates in boreal regions, where low temperatures and water saturation preserve organic matter, the existence of peat in (sub)tropical regions remains enigmatic. Here we examined peat and plant chemistry across a latitudinal transect from the Arctic to the tropics. Near-surface low-latitude peat has lower carbohydrate and greater aromatic content than near-surface high-latitude peat, creating a reduced oxidation state and resulting recalcitrance. This recalcitrance allows peat to persist in the (sub)tropics despite warm temperatures. Because we observed similar declines in carbohydrate content with depth in high-latitude peat, our data explain recent field-scale deep peat warming experiments in which catotelm (deeper) peat remained stable despite temperature increases up to 9 degrees C. We suggest that high-latitude deep peat reservoirs may be stabilized in the face of climate change by their ultimately lower carbohydrate and higher aromatic composition,Peatlands represent large terrestrial carbon banks. Given that most peat accumulates in boreal regions, where low temperatures and water saturation preserve organic matter, the existence of peat in (sub)tropical regions remains enigmatic. Here we examined peat and plant chemistry across a latitudinal transect from the Arctic to the tropics. Near-surface low-latitude peat has lower carbohydrate and greater aromatic content than near-surface high-latitude peat, creating a reduced oxidation state and resulting recalcitrance. This recalcitrance allows peat to persist in the (sub)tropics despite warm temperatures. Because we observed similar declines in carbohydrate content with depth in high-latitude peat, our data explain recent field-scale deep peat warming experiments in which catotelm (deeper) peat remained stable despite temperature increases up to 9 degrees C. We suggest that high-latitude deep peat reservoirs may be stabilized in the face of climate change by their ultimately lower carbohydrate and higher aromatic composition, similar to tropical peats.…
MetadatenVerfasserangaben: | Suzanne B. HodgkinsORCiD, Curtis J. Richardson, René DommainORCiD, Hongjun WangORCiD, Paul H. Glaser, Brittany Verbeke, B. Rose Winkler, Alexander R. CobbORCiD, Virginia I. Rich, Malak Missilmani, Neal Flanagan, Mengchi HoORCiD, Alison M. HoytORCiD, Charles F. HarveyORCiD, S. Rose Vining, Moira A. Hough, Tim R. Moore, Pierre J. H. Richard, Florentino B. De La CruzORCiD, Joumana Toufaily, Rasha Hamdan, William T. Cooper, Jeffrey P. Chanton |
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URN: | urn:nbn:de:kobv:517-opus4-459658 |
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DOI: | https://doi.org/10.25932/publishup-45965 |
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ISSN: | 1866-8372 |
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Titel des übergeordneten Werks (Deutsch): | Postprints der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe |
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Schriftenreihe (Bandnummer): | Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe (1125) |
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Publikationstyp: | Postprint |
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Sprache: | Englisch |
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Datum der Erstveröffentlichung: | 17.02.2021 |
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Erscheinungsjahr: | 2018 |
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Veröffentlichende Institution: | Universität Potsdam |
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Datum der Freischaltung: | 17.02.2021 |
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Freies Schlagwort / Tag: | FTIR spectroscopy; Northern Minnesota; brown rot; chemistry; decomposition; dissolved organic matter; dynamics; greenhouse gas fluxes; lignin content; permafrost thaw |
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Ausgabe: | 1125 |
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Seitenanzahl: | 15 |
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Quelle: | Nature Communications 9 (2018), Art. 3640 DOI: 10.1038/s41467-018-06050-2 |
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Organisationseinheiten: | Mathematisch-Naturwissenschaftliche Fakultät |
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| Mathematisch-Naturwissenschaftliche Fakultät / Institut für Umweltwissenschaften und Geographie |
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DDC-Klassifikation: | 5 Naturwissenschaften und Mathematik / 50 Naturwissenschaften / 500 Naturwissenschaften und Mathematik |
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Peer Review: | Referiert |
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Publikationsweg: | Open Access / Green Open-Access |
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Lizenz (Deutsch): | CC-BY - Namensnennung 4.0 International |
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Externe Anmerkung: | Bibliographieeintrag der Originalveröffentlichung/Quelle |
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