Size-fractionated phytoplankton biomass in autumn of the Changjiang(Yangtze) River Estuary and its adjacent waters after the Three Gorges Dam construction
文献类型：CNKI期刊论文
| 作者 | Song SQ(宋书群); Sun J(孙军); Luan QS(栾青杉); Shen ZL(沈志良) |
| 发表日期 | 2008-08-15 |
| 出处 | Chinese Journal of Oceanology and Limnology
 |
| 关键词 | size-fractionated phytoplankton chlorophyll-a Changjiang(Yangtze) River Estuary Skeletonema costatum Prorocentrum micans environmental factor |
| 英文摘要 | A cruise was undertaken from 3rd to 8th November 2004 in Changjiang(Yangtze) River Estuary and its adjacent waters to investigate the spatial biomass distribution and size composition of phytoplankton.Chlorophyll-a(Chl-a) concentration ranged 0.42-1.17 μg L-1 and 0.41-10.43 μg L-1 inside and outside the river mouth,with the mean value 0.73 μg L-1 and 1.86 μg L-1,respectively.Compared with the Chl-a concentration in summer of 2004,the mean value was much lower inside,and a little higher outside the river mouth.The maximal Chl-a was 10.43 μg L-1 at station 18(122.67°E,31.25°N),and the region of high Chl-a concentration was observed in the central survey area between 122.5°E and 123.0°E.In the stations located east of 122.5°E,Chl-a concentration was generally high in the upper layers above 5 m due to water stratification.In the survey area,the average Chl-a in sizes of >20 μm and <20 μm was 0.28 μg L-1 and 1.40 μg L-1,respectively.High Chl-a concentration of <20 μm size-fraction indicated that the nanophytoplankton and picophytoplankton contributed the most to the biomass of phytoplankton.Skeletonema costatum,Prorocentrum micans and Scrippsiella trochoidea were the dominant species in surface water.The spatial distribution of cell abundance of phytoplankton was patchy and did not agree well with that of Chl-a,as the cell abundance could not distinguish the differences in shape and size of phytoplankton cells.Nitrate and silicate behaved conservatively,but the former could probably be the limitation factor to algal biomass at offshore stations.The distribution of phosphate scattered considerably,and its relation to the phytoplankton biomass was complicated. |
| 文献子类 | CNKI期刊论文 |
| 资助机构 | Supported by the National Natural Sciences Foundation (No. 50339040) ; Knowledge Innovation Program of Chinese Academy of Sciences (KZCX2-YW-213 and KZCX3-SW-232) |
| 卷 | v.26期:03页:38-45 |
| 语种 | 英文; |
| 分类号 | S932.8 |
| ISSN号 | 0254-4059 |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/192895]  |
| 专题 | 中国科学院海洋研究所 |
| 作者单位 | 1.KeyLaboratoryofMarineEcologyandEnvironmentalSciences,InstituteofOceanology,ChineseAcademyofSciences,Qingdao266071,China 2.GraduateSchooloftheChineseAcademyofSciences,Beijing100039,China |
| 推荐引用方式 GB/T 7714 | Song SQ,Sun J,Luan QS,et al. Size-fractionated phytoplankton biomass in autumn of the Changjiang(Yangtze) River Estuary and its adjacent waters after the Three Gorges Dam construction. 2008. |
入库方式： OAI收割
来源：海洋研究所
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