Distribution of net-phytoplankton community in summer and its influence factors in the Changjiang Estuary and adjacent continental shelf

Jiang Zhibing; Zeng Jiangning; Li Hongliang; Zhou Feng; Chen Quanzhen; Zhu Genhai; Zhang Dongsheng; Yan Xiaojun

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Article Navigation > Haiyang Xuebao > 2014 > 36(6): 112-123

Jiang Zhibing, Zeng Jiangning, Li Hongliang, Zhou Feng, Chen Quanzhen, Zhu Genhai, Zhang Dongsheng, Yan Xiaojun. Distribution of net-phytoplankton community in summer and its influence factors in the Changjiang Estuary and adjacent continental shelf[J]. Haiyang Xuebao, 2014, 36(6): 112-123.

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Distribution of net-phytoplankton community in summer and its influence factors in the Changjiang Estuary and adjacent continental shelf

1.
Key Laboratory of Applied Marine Biotechnology, Ministry of Education, Marine College of Ningbo University, Ningbo 315211, China;Key Laboratory of Marine Ecosystem and Biogeochemistry, Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China
2.
Key Laboratory of Marine Ecosystem and Biogeochemistry, Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China
3.
State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China
4.
Key Laboratory of Applied Marine Biotechnology, Ministry of Education, Marine College of Ningbo University, Ningbo 315211, China

Received Date: 2013-05-15

Abstract

Abstract

Net-phytoplankton samples were collected from the Changjiang Estuary (CE) and adjacent continental shelf,East China Sea in June and August 2009. A total of 395 taxa (9 phyla) were identified,including 223 diatom and 125 dinoflagellate species. The phytoplankton abundance in August (3 077.15°10⁴ cells/m³) was significantly higher than that in June (107.80°10⁴ cells/m³). The high-density zone in the CE moved eastward from 31°N,123°E in June to 31°N,123.5°E in August due to the enhancement of Changjiang Diluted Water. The species richness of net-phytoplankton in August was much higher than that in June,while species diversity and evenness were slightly lower than that in June. Pseudo-nitzschia pungens and Ceratium tripos were the dominant species in June. However,P. pungens,Rhizosolenia styliformis and Trichodesmium thiebautii dominated in August. Skeletonema spp. had high abundance in the CE in both June and August,although it was not a dominant species. The analysis of similarity and non-metric multidimensional scaling showed a significantly spatio-temporal difference in phytoplankton community. Canonical correspondence analysis indicated that temperature and salinity were the primary variables affecting the community distribution in June and August,respectively. These data demonstrated that the distribution of phytoplankton community in the CE and adjacent continental shelf was intensively influenced by the circulations and water masses.
- East China Sea,
- Changjiang Estuary,
- phytoplankton,spatio-temporal distribution,
- environmental factors,

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References(34)

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