Warming stimulates sediment denitrification at the expense of anaerobic ammonium oxidation
| Autor: | Tan, Ehui, Zou, Wenbin, Zheng, Zhenzhen, Yan, Xiuli, Du, Moge, Hsu, Ting-Chang, Tian, Li, Middelburg, Jack J., Trull, Thomas W., Kao, Shuh-Ji, Geochemistry, Bio-, hydro-, and environmental geochemistry |
|---|---|
| Přispěvatelé: | Geochemistry, Bio-, hydro-, and environmental geochemistry |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
0303 health sciences
Denitrification 010504 meteorology & atmospheric sciences Chemistry Anaerobic ammonium oxidation Biogeochemistry Sediment Environmental Science (miscellaneous) equipment and supplies 01 natural sciences 03 medical and health sciences Environmental chemistry Social Sciences (miscellaneous) 030304 developmental biology 0105 earth and related environmental sciences |
| Zdroj: | Nature Climate Change, 10(4), 349. Nature Publishing Group |
| ISSN: | 1758-678X |
| Popis: | Temperature is one of the fundamental environmental variables governing microbially mediated denitrification and anaerobic ammonium oxidation (anammox) in sediments. The GHG nitrous oxide (N2O) is produced during denitrification, but not by anammox, and knowledge of how these pathways respond to global warming remains limited. Here, we show that warming directly stimulates denitrification-derived N2O production and that the warming response for N2O production is slightly higher than the response for denitrification in subtropical sediments. Moreover, denitrification had a higher optimal temperature than anammox. Integrating our data into a global compilation indicates that denitrifiers are more thermotolerant, whereas anammox bacteria are relatively psychrotolerant. Crucially, recent summer temperatures in low-latitude sediments have exceeded the optimal temperature of anammox, implying that further warming may suppress anammox and direct more of the nitrogen flow towards denitrification and associated N2O production, leading to a positive climate feedback at low latitudes. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full text from SpringerLink