A Thermodynamic Analysis of Soil Ecosystem Development in Northern Wetlands
| Autor: | Daniel L. Childers, Everett L. Shock, Eric J. Chapman, Merritt R. Turetsky |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
geography
geography.geographical_feature_category Peat 010504 meteorology & atmospheric sciences Ecology Chronosequence Wetland Soil science 04 agricultural and veterinary sciences 15. Life on land Permafrost 01 natural sciences 13. Climate action Soil water 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Environmental Chemistry Environmental science Permafrost carbon cycle Ecosystem Bog 0105 earth and related environmental sciences General Environmental Science |
| Zdroj: | Wetlands. 36:1143-1153 |
| ISSN: | 1943-6246 0277-5212 |
| DOI: | 10.1007/s13157-016-0833-9 |
| Popis: | The Maximum Power Principle (MPP) — a theoretical construct that argues that systems develop to maximize energy throughput, or power — is the subject of few empirical studies. We used the MPP to explore the thermodynamic basis for microbial processes and greenhouse gas fluxes in high latitude peat soils. Increasing temperatures cause extensive areas of permafrost degradation, which can lead to wetland formation, though permafrost degradation and aggradation can be cyclical under the right conditions. Differential ecosystem responses to permafrost degradation offer an opportunity to use the unifying approach of thermodynamics. We used adenosine triphosphate (ATP) production in peat soils as a soil-relevant proxy for power to test the MPP along a chronosequence of wetlands with time following permafrost degradation. We conducted soil incubation experiments and measured production rates of CO2, methane (CH4), nitrous oxide (N2O), and ATP. ATP production was significantly lower (p |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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