引用本文:	周长芳,安树青,赵聪蛟,方超,陆霞梅,赵晖,刘静娜.互花米草入侵对海岸盐沼二甲基硫及氧化亚氮气体释放的影响[J].海洋科学,2009,33(2):17-21.

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互花米草入侵对海岸盐沼二甲基硫及氧化亚氮气体释放的影响
周长芳^1,2, 安树青^1,2, 赵聪蛟¹, 方超¹, 陆霞梅¹, 赵晖¹, 刘静娜¹
1.南京大学生命科学院湿地生态研究所;2.南京大学污染控制与资源化研究国家重点实验室

摘要:

为探讨互花米草（Spartina alterniflora）入侵对我国沿海生态系统的影响，采用静态采样箱法，研究了互花米草入侵滩涂和临近未入侵滩涂在二甲基硫（DMS）、氧化亚氮（N₂O）气体通量上的差异及其相关因素。结果显示，互花米草滩DMS和N₂O释放量均显著高于临近光滩、盐蒿滩和芦苇滩。该两种气体释放量同植被地下生物量、总生物量以及土壤有效氮含量均呈显著正相关，DMS气体通量还与植被地上生物量有关，但两种气体通量与土壤有机质含量均无直接相关性。研究说明互花米草生物入侵不仅改变了生态系统结构，还能通过改变区域温室气体排放通量进而影响到全球气候变化。

关键词: 互花米草（Spartina alterniflora）生物入侵 DMS N₂O 盐沼

DOI：

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基金项目:国家自然科学基金项目（30770358，3040054）；江苏省自然科学基金项目（BK2007152）；东华理工学院核资源与环境教育部重点实验室开放基金项目（060602）

The influence of Spartina alterniflora invasion on emission of DMS and N₂O in coastal salt marsh

ZHOU Chang-fang,AN Shu-qing,ZHAO Cong-jiao,FANG Chao,LU Xia-mei,ZHAO Hui,LIU Jing-na

Abstract:

To explore the influence of the Spartina invasion in Chinese coastal ecosystem, the flux of DMS and N₂O and possible factors determining the flux were studied in the summer, 2005 in Yancheng Natural Reserve of the red-crowned Crane. The results showed that both DMS and N₂O flux were significantly higher in S. alterniflora marsh than those in native Suaeda salsa and Phragmites australis marshes and on open mudflat. Both gases were positively correlated with underground and total biomass and soil available nitrogen. DMS emission was also positively correlated with aboveground biomass. However, no significant correlation was found between soil organic matter and the emission of either DMS or N₂O. Our results indicate that S. alterniflora invasion has not only changed the structure of coastal ecosystem, but also influence the global climate by changing the regional budgets of greenhouse gases.

Key words: Spartina alterniflora biological invasion DMS N₂O salt marsh