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| 茅尾海夏季海水与表层沉积物叶绿素a空间分布研究 |
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廖秀丽1,2, 黄洪辉1,3, 刘华雪1,2, 戴 明1,3, 于 杰1,2, 田梓杨1
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1.中国水产科学研究院 南海水产研究所;2.农业部南海渔业资源环境科学观测实验站;3.广东省渔业生态环境重点实验室
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| 摘要: |
| 根据2011年6月茅尾海生态环境调查资料,对该海域海水和表层沉积物中叶绿素a的空间分布进行了分析。结果表明,海水叶绿素a 变化范围1.384～4.060mg/m3,平均值为2.143mg/m3,表层沉积物叶绿素a范围为0.006～0.740mg/kg(湿重),均值为0.124 mg/kg;海水与表层沉积物叶绿素a均呈现自河口向南逐渐降低的空间分布特征。单位面积表层沉积物叶绿素a平均含量为上方水柱叶绿素a平均含量的129.44%,沉积物对该海域初级生产力有显著的潜在贡献。相关分析表明,海水和沉积物叶绿素a均与无机氮及底栖动物栖息密度呈显著或极显著的正相关关系(P<0.05 或P<0.01)。 |
| 关键词: 叶绿素a 沉积物 茅尾海 |
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| 基金项目:中央级公益性科研院所基本科研业务费专项资金项目(2012TS01); “十二五”国家科技支撑计划(2011BAD13B02) |
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| The spatial distribution of Chlorophyll a in water and surface sediment of Maowei Sea during summer |
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| Abstract: |
| An investigation of the spatial distribution of chlorophyll a (Chl-a) in seawater and surface sediment was carried out in Maowei Sea in June, 2011. The results showed that the Chl-a concentration in water ranged from 1.384 to 4.06 mg/m3, with an average of 2.143 mg/m3. Chl-a concentration in surface sediment ranged from 0.006 to 0.740 mg/kg (wet weight) with an average of 0.124 mg/kg. The spatial distribution features of Chl-a concentration in seawater and surface sediment were gradually reducing from the river mouth to the south area. Chl-a content in sediments took up 129.44% of that in above water column, indicated that the potential contribution of Chl-a in sediment on primary productivity was remarkable. Correlation analysis showed that Chl-a concentration in seawater and surface sediment has significant (P<0.05) or very significant (P<0.01) positive correlation with inorganic nitrogen and macrobenthos population density. |
| Key words: Chlorophyll a sediment Maowei Sea |