海岸带盐沼挥发性氯代烷烃单体成分通量的相互关系

doi:10.13249/j.cnki.sgs.2012.02.213

地理科学 ›› 2012, Vol. 32 ›› Issue (2): 213-215.doi: 10.13249/j.cnki.sgs.2012.02.213

海岸带盐沼挥发性氯代烷烃单体成分通量的相互关系

王进欣¹(), 王今殊¹, 钦佩²(), 张维康¹, 王栋¹, 蒯梅娟¹

1. 徐州师范大学城市与环境学院, 江苏徐州 221116
2. 南京大学生命科学学院, 江苏南京 210093

收稿日期:2011-01-27 修回日期:2011-04-18 出版日期:2012-02-20 发布日期:2012-02-20
作者简介:
作者简介:王进欣(1971-),男,江苏徐州人,博士,副教授,主要从事湿地生态研究。E-mail:yujianw7125@163.com
基金资助:
林业科技支撑计划子专题(2006BAD03A1903)和国家自然科学基金项目(90211008)和31100361资助

Relationship Among Volatile Chloroalkanes Fluxes of Coastal Salt Marsh

Jin-xin WANG¹(), Jin-shu WANG¹, Pei QIN²(), Wei-kang ZHANG¹, Dong WANG¹, Mei-juan KUAI¹

1. College of Urban and Environment, Xuzhou Normal University, Xuzhou, Jiangsu 221116, China
2. Department of Biology, Nanjing University, Nanjing, Jiangsu 210093,China

Received:2011-01-27 Revised:2011-04-18 Online:2012-02-20 Published:2012-02-20

摘要/Abstract

摘要：

挥发性氯代烷烃是大气中重要的短命氯源气体,对全球气候变暖和臭氧层破坏具有重要贡献,在全球C和Cl元素循环中扮演着重要的角色,具有非常重要的环境意义。分别于生长季(2004年7月)和非生长季(2005年1月)在苏北海岸带盐沼沿环境梯度采用静态箱技术原位测定氯代甲烷(CH₃Cl、CH₂Cl₂、CHCl₃和CCl₄)和氯代乙烷(CH₃CHCl₂和CH₃CCl₃)6种单体成分通量。结果表明:海岸带盐沼生态系统氯代烷烃单体成分通量关系的差异性主要表现在3个方面:一是海岸带盐沼高氯烷烃不同单体成分间具有很好的相关性,而低氯烷烃CH₃Cl与各种高氯烷烃单体成分间相关性不显著。这表明海岸带盐沼低氯烷烃和高氯烷烃的源汇过程可能是不同的,而高氯烷烃间可能存在比较一致的源汇过程;二是高等植物对氯代烷烃不同单体成分贡献的差异性表现为对低氯烷烃CH₃Cl表现为源效应,而对高氯烷烃则表现为汇效应;三是盐沼土壤对氯代烷烃不同单体成分的贡献均表现为汇效应,但是研究区低氯烷烃和高氯烷烃来源和生物降解模式不同。低氯烷烃CH₃Cl可能源于盐沼植物及其枯落物排放和海洋排放的输入,而高氯烷烃含量既可能来自非生长季盐沼植物和凋落物腐解释放,也可能来自其他区域人类活动排放和海洋排放的外源输入。因此,海岸带盐沼对外源输入的高氯烷烃具有吸纳作用。

关键词: 氯代烷烃, 相互关系, 海岸带盐沼

Abstract:

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

中图分类号:

X142

王进欣, 王今殊, 钦佩, 张维康, 王栋, 蒯梅娟. 海岸带盐沼挥发性氯代烷烃单体成分通量的相互关系[J]. 地理科学, 2012, 32(2): 213-215.

Jin-xin WANG, Jin-shu WANG, Pei QIN, Wei-kang ZHANG, Dong WANG, Mei-juan KUAI. Relationship Among Volatile Chloroalkanes Fluxes of Coastal Salt Marsh[J]. SCIENTIA GEOGRAPHICA SINICA, 2012, 32(2): 213-215.

图/表 4

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	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

海岸带盐沼挥发性氯代烷烃单体成分通量的相互关系

Relationship Among Volatile Chloroalkanes Fluxes of Coastal Salt Marsh

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