State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China.
Environ Pollut. 2012 Jul;166:116-24. doi: 10.1016/j.envpol.2012.03.006. Epub 2012 Apr 9.
Nitrous oxide (N(2)O) emissions from Phragmites australis (reed)--dominated zones in Baiyangdian Lake, the largest shallow lake of Northern China, were investigated under different hydrological conditions with mesocosm experiments during the growing season of reeds. The daily and monthly N(2)O emissions were positively correlated with air temperature and the variation of aboveground biomass of reeds (p < 0.05), respectively. The N(2)O emissions from reeds were about 45.8-52.8% of that from the sediments. In terms of the effect of hydrological conditions, N(2)O emissions from the aquatic-terrestrial ecotone were 9.4-26.1% higher than the submerged zone, inferring that the variation of water level would increase N(2)O emissions. The annual N(2)O emission from Baiyangdian Lake was estimated to be about 114.2 t. This study suggested that N(2)O emissions from shallow lakes might be accelerated by the climate change as it has increased air temperature and changed precipitation, causing the variation of water level.
芦苇（Phragmites australis）（中国北方最大的浅水湖泊——白洋淀中芦苇占优势的区域）排放的一氧化二氮（N2O）在芦苇生长季节，通过中观实验，在不同水文学条件下进行了研究。每日和每月的 N2O 排放量与空气温度和芦苇地上生物量的变化呈正相关（p < 0.05）。芦苇排放的 N2O 约占沉积物排放的 45.8-52.8%。就水文学条件的影响而言，水陆交错带的 N2O 排放量比淹没区高 9.4-26.1%，这表明水位变化会增加 N2O 的排放量。估计白洋淀的年 N2O 排放量约为 114.2 吨。本研究表明，由于气候变化导致气温升高和降水变化，从而引起水位变化，浅水湖泊的 N2O 排放可能会加速。
