Low‐severity fire as a mechanism of organic matter protection in global peatlands: Thermal alteration slows decomposition
نویسندگان
چکیده
منابع مشابه
The Relative Importance of Methanogenesis in the Decomposition of Organic Matter in Northern Peatlands
Using an isotope-mass balance approach and assuming the equimolar production of CO2 and CH4 from methanogenesis (e.g., anaerobic decomposition of cellulose), we calculate that the proportion of total CO2 production frommethanogenesis varies from 37 to 83% across a variety of northern peatlands. In a relative sense, methanogenesis was a more important pathway for decomposition in bogs (80 ± 13% ...
متن کاملGlobal vulnerability of peatlands to fire and carbon loss
11 Peatland ecosystems accumulate thick organic soil layers because plant production exceeds decomposition throughout the entire organic soil column (Fig. 1). Peatlands cover only about 2–3% of the Earth’s land surface but store around 25% of the world’s soil carbon1. They are most abundant at northern high latitudes (Fig. 2a), where they cover roughly 4,000,000 km2 of land1 and store an estima...
متن کاملLong-term photochemical and microbial decomposition of wetland-derived dissolved organic matter with alteration
We investigated the long-term photochemical and microbial decomposition of biologically recalcitrant humiclike dissolved organic matter (DOM) leached from a vascular wetland plant, the common rush (Juncus effusus). Although the leachate would have been characterized as biologically recalcitrant by short-term (,14 d) bioassays, microbes decomposed 51% of its organic carbon in 898 d with a first-...
متن کاملThermal Decomposition Mechanism for Ethanethiol.
The thermal decomposition of ethanethiol was studied using a 1 mm × 2 cm pulsed silicon carbide microtubular reactor, CH3CH2SH + Δ → Products. Unlike previous studies these experiments were able to identify the initial ethanethiol decomposition products. Ethanethiol was entrained in either an Ar or a He carrier gas, passed through a heated (300-1700 K) SiC microtubular reactor (roughly ≤100 μs ...
متن کاملThe effect of fire on soil organic matter--a review.
The extent of the soil organic carbon pool doubles that present in the atmosphere and is about two to three times greater than that accumulated in living organisms in all Earth's terrestrial ecosystems. In such a scenario, one of the several ecological and environmental impacts of fires is that biomass burning is a significant source of greenhouse gases responsible for global warming. Neverthel...
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ژورنال
عنوان ژورنال: Global Change Biology
سال: 2020
ISSN: 1354-1013,1365-2486
DOI: 10.1111/gcb.15102