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Journal of Environmental Science and Health, Part A
Toxic/Hazardous Substances and Environmental Engineering
Volume 40, 2005 - Issue 6-7
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Original Articles

Methane (CH4) Emission from a Natural Wetland of Northern China

GUO-HONG HUANG Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, China
,
XIU-ZHEN LI Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, China
,
YUAN-MAN HU Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, China
,
YI SHI Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, China
&
DU-NING XIAO Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, China
Pages 1227-1238 | Published online: 20 Aug 2010
 
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Abstract

This article focuses on the seasonal and spatial changes of CH4 emission from the natural reed marsh of Liaohe Delta, China. Field experiments showed that this natural wetland acts as a CH4 sink in spring (−30 ∼ −1000 μ g/m2.h), a strong source in summer (400–3000 μ g/m2.h) and a weak source in autumn (< 400 μg/m2.h). Reed plants play an important role in transportation and emission of methane produced in soil. According to our field measurement data, CH4 emission is positively related to temperature, and negatively related to Eh value and water depth. The activity of methanogenic bacteria is higher in the rhizosphere and surface layer, and thus contributes more in CH4 emission than other layers.

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Related Research Data

Methane (CH4) emission from a tidal marsh in the Min River estuary, southeast China.
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