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- W3155286690 abstract "<p>There is a general consensus that peatlands are the source of about 10% of the global CO<sub>2</sub>, CH<sub>4</sub> and N<sub>2</sub>O greenhouse gas (GHG) emissions. Yet, our knowledge about underlying processes and environmental factors that regulate the GHG are limited. Here, we found that the GHG balance of CO<sub>2</sub>, CH<sub>4</sub> and N<sub>2</sub>O in 48 open peatland sites on five continents can be predicted by a model that incorporates soil water content (SWC) and archaeal abundance. We used our global database (2011&#8211;2019) on peat characteristics and field-measured soil respiration (ER), CH<sub>4</sub> and N<sub>2</sub>O emissions. Furthermore, we used the gross primary productivity (GPP) dataset by Running, Mu & Zhao (2015) on the basis of satellite data from the Moderate Resolution Imaging Spectrometer (MODIS) sensors alongside the ER to derive net ecosystem exchange (NEE) of carbon. The GHG balance follows SWC along a bell-shaped curve and increases with archaeal abundance and decomposition rate of peat-forming plant species. Thus, the net GHG emission peaks at intermediate SWC. These factors combined explains 61.9% (adjusted R<sup>2</sup> = 0.587) of GHG balance and most of this variance is made up by the NEE of carbon (adjusted R<sup>2</sup> = 0.97).</p>" @default.
- W3155286690 created "2021-04-26" @default.
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- W3155286690 date "2021-03-04" @default.
- W3155286690 modified "2023-09-27" @default.
- W3155286690 title "Greenhouse gas balance of open peatlands is globally governed by soil water content and archaeal abundance" @default.
- W3155286690 doi "https://doi.org/10.5194/egusphere-egu21-8969" @default.
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