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时间:2020-03-28
《珠江口赤潮爆发过程中水体及表层沉积物间隙水中营养盐与叶绿素的变化特征.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第35卷第4期2016年8月海洋通报ⅣUUUNESCmNCEBULLETINV01.35,No.4Aug.2016Doi:10.11840/j.issn.1001-6392.2016.04.014珠江口赤潮爆发过程中水体及表层沉积物间隙水中营养盐与叶绿素的变化特征赵春宇1’2,谭烨辉1,柯志新1,刘华健1,2刘甲星k2(1.中国科学院南海海洋研究所热带海洋生物资源与生态重点实验室,广东广州510301;2.中国科学院大学,北京100049)摘要:为探讨夜光藻赤潮爆发时期,珠江口沉积物营养盐的分布与释放特征及其对水体和沉积物
2、中叶绿素Chl—a、脱镁叶绿酸Pha—a分布的影响,于2015年1月对珠江口进行了采样分析。研究发现,在赤潮爆发期间水体中的NOs-N、NH4一N含量较高,占DIN的比例分别为59%、32.8%。表层水体中营养盐含量均高于底层,这是因为表层水体主要受陆源污染,营养物质含量较高,而在底层水体中,由于赤潮中后期浮游生物沉降到底层,消耗了底层的营养物质,使其浓度低于表层。P04-P和SiOs-Si的分布特点与前者相似,其平均值分别为0.019mgL、0.74ms/L。与此同时,沉积物间隙水中的营养物质不断向水体中释放,促进了水体
3、中浮游植物的生长繁殖,从而为夜光藻赤潮的爆发提供丰富饵料。此外,浮游植物的生长与沉积物,水界面之间的NH,N、Si03-Si扩散通量呈现极显著相关关系(P4、素Chl—a;脱镁叶绿酸Pha—a;底栖生产力中图分类号:X55文献标识码:A文章编号:1001—6932【2016)04一0457—1lDistributioncharacteristicsofChlorophyllandthenutrientreleasefluxinthesedimentsduringthealgalbloomsZHAOChun—yul。,TANYe—huil’,KEZhi—xinl,LIUHua-jianll2,LIUJia-xin9112(1.KeyLaboratoryofTropicalMari5、neBio--resourcesandEcology,CAS,GuangzhOU510301,China;2.UniversityofChineseAcademyofSciences,Beijing100049,China)Abstract:InordertostudythereleaseanddistributioncharacteristicsoftheantrientsandthedistributionofChlorophyllandPheophorbide-ainthewaterandsedimentsdurin6、gthealgalblooms.wetookthesamplesinthePeallRiverEstuaryinJanuary.TheresultsshowedthatthecontentofN03-NandNHrNin血ewaterwerehigherandaccountedfor59%and32.8%oftheDINrespectively.Thenutrientsinthesurfacewerohigherthanthoseinthebottom,becausethesurfacewaterwasmainlypoUu7、tedbytheland-basedsourcewhichcouldimprovethenutrientcontent.Howeverinthebottomwater,theharmfulalgalsettledtothebottomandconsumedalotofnutrients.SOthecontentWaSlowerthanthatinthesurfacewater.P04一PandSi03-Sihadthesimilardistributionandtheaveragevalueswere0.019m班and08、.74mg/Lrespectively.Atthesalnetime,duringthealgalblooms,thenutrientsinthesedimentswerealwaysreleasedintothewater,whichcouldpromotethegrowthofthealgaland
4、素Chl—a;脱镁叶绿酸Pha—a;底栖生产力中图分类号:X55文献标识码:A文章编号:1001—6932【2016)04一0457—1lDistributioncharacteristicsofChlorophyllandthenutrientreleasefluxinthesedimentsduringthealgalbloomsZHAOChun—yul。,TANYe—huil’,KEZhi—xinl,LIUHua-jianll2,LIUJia-xin9112(1.KeyLaboratoryofTropicalMari
5、neBio--resourcesandEcology,CAS,GuangzhOU510301,China;2.UniversityofChineseAcademyofSciences,Beijing100049,China)Abstract:InordertostudythereleaseanddistributioncharacteristicsoftheantrientsandthedistributionofChlorophyllandPheophorbide-ainthewaterandsedimentsdurin
6、gthealgalblooms.wetookthesamplesinthePeallRiverEstuaryinJanuary.TheresultsshowedthatthecontentofN03-NandNHrNin血ewaterwerehigherandaccountedfor59%and32.8%oftheDINrespectively.Thenutrientsinthesurfacewerohigherthanthoseinthebottom,becausethesurfacewaterwasmainlypoUu
7、tedbytheland-basedsourcewhichcouldimprovethenutrientcontent.Howeverinthebottomwater,theharmfulalgalsettledtothebottomandconsumedalotofnutrients.SOthecontentWaSlowerthanthatinthesurfacewater.P04一PandSi03-Sihadthesimilardistributionandtheaveragevalueswere0.019m班and0
8、.74mg/Lrespectively.Atthesalnetime,duringthealgalblooms,thenutrientsinthesedimentswerealwaysreleasedintothewater,whichcouldpromotethegrowthofthealgaland
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