海南东寨港红树林湿地沉积物有机碳的分布特征  

Distribution of organic carbon in sediments of mangrove forests and its influencing factors in Dongzhai Harbor

作　　者：李燕 赵志忠 王鸿平 贾丽 邢瑶丽 LI Yan, ZHAO Zhizhong, WANG Hongping, JIA Li, XING Yaoli(School of Geography and Environmental Science,Hainan Normal University, Haikou 57115)

机构地区：[1]海南师范大学地理与环境科学学院,海口571158

出　　处：《安徽农业大学学报》2018年第2期268-273,共6页Journal of Anhui Agricultural University

基　　金：国家自然科学基金项目(41261062);海南省重点科技计划项目(ZDXM20130021);海南省自然科学基金创新团队项目(2017CXTD006)共同资助

摘　　要：为探讨东寨港红树林边缘区湿地沉积物有机碳分布特征,采集东寨港红树林湿地光滩、林缘和林内0~40 cm柱状沉积物,在室内测定沉积物样品总有机碳含量、粒度和p H等指标。结果表明,东寨港红树林湿地0~40 cm柱状沉积物总有机碳的含量为1.80~100.73 g·kg^(-1),平均值为(26.24±2.64)g·kg^(-1),该值处于我国红树林沉积物总有机碳的含量的中上水平。受红树林根系生产力的影响,光滩0~40 cm柱状沉积物总有机碳含量的垂向分布表现为C层>B层>D层>A层、林缘表现为B层>D层>A层>C层、林内表现为A层>C层>B层>D层。红树林表层总有机碳含量与其地上生物量呈正相关关系,红树林植被覆盖区沉积物的总有机碳含量明显高于无植被地区,因此不同类型湿地的表层沉积物总有机碳含量呈现出林内>林缘>光滩的趋势。相关性分析表明:表层沉积物有机碳在林内和光滩表现出明显的细颗粒富集,林缘却较为微弱,光滩、林缘、林内表层沉积物的p H与有机碳含量呈显著负相关。In order to investigate the distribution characteristics of organic carbon in the sediments of wetlands in the mangrove marginal area of Dongzhaigang, in the paper, columnar sediment samples from the mangrove wetland of the inside of forest, edge of forest and light beach at the depth of 0-40 cm were taken, the TOC, particle size and p H of the sediment samples were measured indoors. The results showed that the average TOC in 0-40 cm mangrove sediments of Dongzhai Harbor was between 1.80-100.73 g·kg（-1）, with an average value of（26.24±2.64） g·kg（-1）. This value is in the middle and upper levels of TOC in mangrove sediments in China. Affected by mangrove root productivity, the vertical distribution of TOC in columnar sediments from 0-40 cm in light beach shows C〉B〉D〉A layer, the forest edge is BDA C layer and inside of forest is A〉C〉B〉D. There is a positive correlation between the TOC content of the mangrove and its aboveground biomass, and the TOC content of the sediments in the mangrove vegetation cover area is significantly higher than that in the non-vegetated area. Therefore, the TOC content of the surface sediments of different types of wetland appears with the trend of inside of forest forest edge mud flats. The correlation analysis showed that TOC in the surface sediments showed obvious fine-grained enrichment in the inside of forest and light beach, edge of forest was relatively weak, and the p H of surface sediments was significantly negatively correlated with TOC.

关 键 词：东寨港 红树林沉积物 有机碳分布 影响因素 

分 类 号：S718.554.2[农业科学—林学] S714.8