广东省典型海湾表层沉积有机质的来源和分布

doi:10.11978/j.issn.1009-5470.2012.06.010

热带海洋学报 ›› 2012, Vol. 31 ›› Issue (6): 62-68.doi: 10.11978/j.issn.1009-5470.2012.06.010cstr: 32234.14.j.issn.1009-5470.2012.06.010

广东省典型海湾表层沉积有机质的来源和分布

张才学, 林宏升, 孙省利

广东海洋大学海洋资源与环境监测中心, 广东湛江 524088

收稿日期:2011-06-21 修回日期:2011-09-16 出版日期:2012-12-01 发布日期:2013-02-06
作者简介:张才学(1963—), 男, 广东省阳春市人, 副教授, 主要研究海洋生态与海洋环境。
基金资助:
国家海洋行业公益性项目(200905005-05)；广东省海洋渔业科技推广专项(A200899J01)

Source and distribution of organic matter in surface sediments of a typical bay in Guangdong Province, China

ZHANG Cai-xue, LIN Hong-sheng, SUN Xing-li

Monitoring Center of Ocean Resource and Environment, Guangdong Ocean University, Zhanjiang 524088, China

Received:2011-06-21 Revised:2011-09-16 Online:2012-12-01 Published:2013-02-06

摘要/Abstract

摘要： 于2009年对广东省3个典型海湾湛江港、深圳湾和流沙湾表层沉积物的稳定碳同位素进行了分析。结果显示, 湛江港表层沉积物δ13C值的范围为?25.9‰—?23.9‰, 平均值为?25.2‰；深圳湾表层沉积物的δ¹³C值的范围为?25.9‰—?23.2‰, 平均值为?25.1‰；流沙湾表层沉积物的δ¹³C值的范围为?23.2‰—?20.0‰, 平均值为?20.9‰。根据经典二元模式计算, 湛江港陆源有机质的贡献比例范围为0.57—0.90, 平均为0.78；深圳湾陆源有机质的贡献比例范围为0.45—0.90, 平均为0.76；而流沙湾表层沉积有机质中海洋有机质的贡献比例较大, 陆源有机质的贡献比例很小。湛江港和深圳湾表层沉积有机质主要来源于陆架, 可能是C3(光合作用最初产物为三碳化合物)植物和海洋浮游微藻的混合有机质, 但起主导作用的是陆架C3植物；而流沙湾表层沉积有机质主要来源于大型海藻和贝类的排泄物。各海湾沉积有机质的分布没有明显的规律性, 主要受大陆径流、航运和潮汐的影响, 同时也受海域初级生产力和水产养殖业的影响。

关键词: 稳定碳同位素, 表层沉积物, 典型海湾, 广东省

Abstract: The authors investigated stable carbon isotopes of surface sediments from three typical bays in Guangdong Province, namely, Zhanjiang Bay, Shenzhen Bay and Liusha Bay, collected in 2009. The results showed that the δ¹³C values in the surface sediments from Zhanjiang Bay ranged from ?25.9 to ?23.9‰ with an average of ?25.2‰; those from Shenzhen Bay were from ?25.9 to ?23.2‰ with an average of ?25.1‰; and the those from Liusha Bay were from ?23.2 to ?20.0‰ with an average of ?20.9‰. Based on the classic binary mode, the proportion of terrestrial organic matter was in a range of 0.57?0.90 with an average of 0.78 in Zhanjing Bay, was in a range of 0.45?0.90 with an average of 0.76 in Shenzhen Bay, while that in Liusha Bay was small, and the proportion of its marine organic matter was high. The organic matters in the surface sediments of Zhanjiang Bay and Shenzhen Bay were mainly originated from the continental shelf, including the mixed organic matters from C3 plants and from marine planktonic microalgae, with the C3 plants playing the leading role. However, the organic matters in the surface sediments of Liusha Bay were almost all originated from macroalgae and shellfish’s excreta. Their distributions showed no obvious regularity, which was mainly affected by continental runoff, shipping and tides, as well as by the primary productivity in the sea water and aquaculture.

Key words: stable carbon isotope, surface sediment, typical bay, Guangdong Province

中图分类号:

P736.2

张才学, 林宏升, 孙省利. 广东省典型海湾表层沉积有机质的来源和分布[J]. 热带海洋学报, 2012, 31(6): 62-68.

ZHANG Cai-xue, LIN Hong-sheng, SUN Xing-li. Source and distribution of organic matter in surface sediments of a typical bay in Guangdong Province, China[J]. Journal of Tropical Oceanography, 2012, 31(6): 62-68.

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广东省典型海湾表层沉积有机质的来源和分布

Source and distribution of organic matter in surface sediments of a typical bay in Guangdong Province, China

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