中国主要红树林湿地沉积物中硫的分布特征及影响因素

以中国红树林主要分布地区--海南、广东、广西、福建的13个红树林区为研究对象,对沉积物中硫的分布特征及相关影响因素进行了分析.中国红树林地区沉积物中硫含量为0.009%～0.809%,平均含量为0.214%,远高于非红树林生长地区沉积物中硫的平均含量.海南、广东、广西、福建四省区红树林沉积物中硫的平均含量分别为:0.34%、0.19%、0.20%、0.18%.13个地区含硫量高低顺序为:三亚、东寨港、云霄、钦州、俄湾、姚家屿、高桥、山口、大冠沙、北仑河口、福田、洛阳桥、浮宫.各个不同红树林地区沉积物中的硫含量差异显著.硫含量与有机质含量、盐度显著正相关,与pH值显著负相关.土壤粒度组成以及铁含量对土壤中全硫含量有一定的影响.

Distribution and influential factors of sulfur in mangrove wetlands in China

Thirteen important mangrove areas including Hainan, Guangdong, Guangxi, Fujian were studied, and distribution and influential factors of sulfur were discussed. Total Sulfur (TS) content ranged 0.009%~0.809%, with an average value of 0.214%, which was much higher than that in the sediments without mangrove. The TS concentrations in Hainan, Guangdong, Guangxi and Fujian were: 0.34%, 0.19%, 0.20% and 0.18% respectively. The order of TS concentration in sediments of these mangrove wetlands decreased:Saiao>Qinzhou>Ewan>Yaojiayu>Gaoqiao>Shankou>Daguansha>Beilunhekou>Futian>Luoyangqiao>Fugong. Organic matter and salinity correlated significantly with the TS concentration in sediments; pH correlated negatively with the TS concentration. Size fraction and iron content also influenced TS concentration in sediments.