Ecological study on picophytoplankton in the Taiwan Strait Ⅱ. Group composition,growth rate and its affecting factors

HUANG Bang-qin; HONG Hua-sheng; LIN Xue-ju; OU Lin-jian

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HUANG Bang-qin, HONG Hua-sheng, LIN Xue-ju, OU Lin-jian. Ecological study on picophytoplankton in the Taiwan Strait Ⅱ. Group composition,growth rate and its affecting factors[J]. Haiyang Xuebao, 2003, 25(6): 99-105.

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Ecological study on picophytoplankton in the Taiwan Strait Ⅱ. Group composition,growth rate and its affecting factors

Marine Environmental Science Laboratory Ministry of Education/Environmental Science Research Center, Xiamen University, Xiamen 361005, China

Received Date: 2001-08-10
Rev Recd Date: 2001-12-24

Abstract

Abstract

The studies on the composition, growth rate and environmental controlling were car ried out during three cruises in the Taiwan Strait (August 1997, February-March 1998 and August 1998) using epifluorescence microscopy and ¹⁴C-radio tracer.The results show that phycoerythrin-rich cyanobacteria (PE) dominate in abundance (contributed 83%~93%), picoeukaryotes (EU) are second and phycocyanin-rich cyanobacteria (PC) are the least abundant.With carbon biomass, PE still predominates although the contribution goes down (52%~74%), EU's contribution increases up to 26%~44%.Growth rate of picophy toplankton varies from 0.52 to 2.25 d^-1, which may be due to different environmental parameters (e.g., nutrients) in the study area.Prochlorococcus may occur in the Taiwan Strait by using chl.a evaluation, its abundance ranges between 10⁷ and 10⁸ cell/dm³, Prochlorococcus dominate the picophytoplankton both in abundance and biomass if included in picophytoplankton in the Taiwan Strait in August 1997, and February-March 1998, however, cyanobacteria dominate in carbon biomass in August 1998.
- picophytoplankton,
- composition,
- growth rate,
- Taiwan Strait,
- controlling factors

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References(34)

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