| 摘要: |
| 于2004 年9 月，在胶州湾潮间带河套和红石崖两个区域(分别代表近河和近海区域)分别采集沉积物柱状样品，并分析了样品中有机碳和叶绿素含量。结果表明：（1）胶州湾潮间带沉积物有机碳和总氮质量比分别为1.0～3.0 g/kg 和0.1～0.3 g/kg，随沉积物埋藏深度表现为波动变化，但无明显规律性；（2）胶州湾潮间带沉积物从表层到底层叶绿素a 质量比的总体趋势是逐渐降低最后趋于稳定，叶绿素a 质量比变化为0.3～5.2 g/kg；（3）胶州湾潮间带沉积物中的有机质应属于混源有机质。本实验结果对探讨胶州湾潮间带近河和近海区域沉积物中有机碳和叶绿素的埋藏和降解规律有重要意义。 |
| 关键词: 胶州湾 潮间带 有机碳 叶绿素 |
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| 基金项目:国家自然科学基金项目( 40206017)；国家重大基础发展规划项目（2002CB412402） |
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| Preservation of organic carbon and chlorophylls in the intertidal sediments of Jiaozhou Bay |
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| Abstract: |
| In order to explore the preservation and degradation characteristics of intertidal sediments, the contents of organic carbon, nitrogen, and chlorophylls were analyzed in sediment cores from two sites, representing the area near to river and sea, respectively, in the intertidal areas of Jiaozhou Bay. The data show that the organic carbon and total nitrogen concentrations in intertidal sediments of Jiaozhou Bay were variable (ranged at 1.0～3.0 g/kg and 0.1～0.3 g/kg, respectively), and no obvious trends were discovered in the depth profiles in the sediments. Chlorophyll a concentrations in the intertidal sediments of Jiaozhou Bay show a significant decrease with depth going down to 15-17 cm and then remained unchanged, ranging from 0.3 to 5.2 g/kg. C/N ratios suggested that the organic matter in the intertidal sediments of Jiaozhou Bay originated from both sea production, terrigenous input, and organic matter from sea production degreed prior to that from terrigenous input. |
| Key words: Jiaozhou Bay intertidal area organic carbon/nitrogen chlorophylls |
