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The Contrast of CH4 Emission from the Cyperus Malaccensis Wetland and the Barren Wetland in Minjiang Estuary Area

Author: LinZuoYing
Tutor: ZengCongSheng
School: Fujian Normal University
Course: Natural and geographical
Keywords: CH4 emission dynamics Environmental factors Salty grass wetlands Light Beach wetlands Minjiang River estuary
CLC: X51
Type: Master's thesis
Year: 2008
Downloads: 75
Quote: 4
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Abstract


Minjiang River estuary is one of our important natural wetlands . This study selected the largest bottomland wetlands - eel Beach as the experimental area , the use of field positioning observation and laboratory sample analysis combining static camera obscura - Gas chromatography ( closed the black chamber - gas chromatograph techniques ) , and measurement and analysis before the salty grass wetland at high tide , the ebb and ebb after three phase CH of 4 emissions in mudflat wetland before high tide and low tide after CH 4 emissions situation , the main growing season and non- main growing season salty grass , CH 4 emissions daily process , as well as the CH 4 emissions flux with major environmental impact factors relationship . The application of gray correlation analysis , correlation analysis , regression analysis , a significant difference T- test , system clustering analysis of mathematical methods . The results show that : (1) the combined effects of environmental factors determines the salty grass CH the emission flux Day variations . (2 ) in the daily process of temperature effects conceal often other environmental factors . (3) CH 4 emission flux of seasonal changes in the salty grass wetlands bimodal pattern , temperature and plant factors play a major role ; , temperature is the most critical factor in a single peak mode light Shoal . (4) the better reducing conditions and foreign CH 4 to enter the light beach CH 4 emission flux is greater than the main reason into grass wetlands . (5 ) For the CH 4 emission flux , temperature and biomass are the main factors affecting the seasonal changes ; salinity the tidal cycle changes the dominant factor , but not the impact of seasonal variations large.

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CLC: > Environmental science, safety science > Environmental pollution and its prevention > Atmospheric pollution and its control
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