Relationship Among Volatile Chloroalkanes Fluxes of Coastal Salt Marsh
Received date: 2011-01-27
Request revised date: 2011-04-18
Online published: 2012-02-20
Copyright
Volatile chloroalkanes are important short-lived atmospheric chlorine source gases, and have important contribution to global warming and ozone depletion, and play important role in the global C and Cl cycle. The fluxes of chloroalkanes were measured seasonally using static flux chambers along an elevational gradient of a coastal salt marsh of eastern China. Main results showed that, difference of relationship among the fluxes of chloroalkanes between methyl chloride and higher chloroalkanes is mainly manifested in the three aspects. First, poor correlations were found between the fluxes of methyl chloride and higher chloroalkanes, but the fluxes of various higher chloroalkanes were closely correlated in the present study. This suggests that methyl chloride and higher chloroalkanes may have different sources and sinks, whereas various higher chloroalkanes share a common source and sink, and that lower chloroalkanes were formed from the degradation of higher chloroalkanes. Second, the contribution of fluxes of methyl chloride of high plant showed differences is positive, while the contribution of fluxes of higher chloroalkanes of high plant is negative. Third, the contribution of fluxes of chloroalkanes of salt marsh soil is negative, but sources and biodegradation of methyl chloride and higher chloroalkanes are different.
Key words: chloroalkanes; relationship; coastal salt marsh
WANG Jin-xin , WANG Jin-shu , QIN Pei , ZHANG Wei-kang , WANG Dong , KUAI Mei-juan . Relationship Among Volatile Chloroalkanes Fluxes of Coastal Salt Marsh[J]. SCIENTIA GEOGRAPHICA SINICA, 2012 , 32(2) : 213 -215 . DOI: 10.13249/j.cnki.sgs.2012.02.213
Fig. 1 The variation of chloroalkanes fluxes of salt marsh ecosystem图1 盐沼生态系统氯代甲烷各单体成分通量 |
Fig. 2 The variation of chloroalkanes fluxes for the treatment (aboveground plant biomass removed) of salt marsh ecosystem图2 盐沼生态系统高等植物地上部分去除后氯代烷烃各单体成分通量 |
Fig. 3 The variation of the contributed by aboveground plant biomass to chloroalkanes fluxes of salt marsh ecosystem图3 盐沼生态系统高等植物地上部分氯代烷烃各单体成分通量贡献 |
Table 1 Half-matrix of correlation coefficient chloroalkanes of coastal salt marsh (n=84)表1 海岸带盐沼氯代烷烃单体成分通量半矩阵相关分析(n=84) |
CH3Cl | CH2Cl2 | CHCl3 | CCl4 | CH3CHCl2 | CH3CCl3 | |
---|---|---|---|---|---|---|
CH3Cl | 1 | |||||
CH2Cl2 | -0.1946ns | 1 | ||||
CHCl3 | -0.0256ns | 0.7490*** | 1 | |||
CCl4 | 0.0061ns | 0.7897*** | 0.9040*** | 1 | ||
CH3CHCl2 | 0.1196ns | 0.4577** | 0.4994** | 0.4054** | 1 | |
CH3CCl3 | 0.0264ns | 0.7411*** | 0.8886*** | 0.9759*** | 0.3844* | 1 |
注:*p<0.05,**<p<0.01,***p<0.001,ns p>0.5。 |
The authors have declared that no competing interests exist.
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