Phytoplankton and bacterioplankton biomass, production and turnover in a semi-enclosed embayment with spring tide induced upwelling

Chung Chi Chen, Fuh Kwo Shiah, Hung Jen Lee, Kuo Yuan Li, Pei Jie Meng, Shui Ji Kao, Yu Fang Tseng, Chia Lu Chung

Research output: Contribution to journalArticle

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Abstract

We examined the short time scale (i.e. hours to days) responses of phytoplankton and heterotrophic bacteria to a spring tide-driven upwelling, which is different from classical wind-driven systems, in southern Taiwan in a semi-enclosed embayment. Results showed that nitrate concentrations (NO 3-, <0.15 to 10.2 μM) correlated negatively with temperature (ca. 16 to 26°C). Estimated NO3- flux upwelled from >70 m was ∼60 mmol N m-2 h-1 with <1 % of it utilized by phytoplankton. Chlorophyll a concentrations doubled from 0.07 to 0.16 μg l-1 in the 9 h after the upwelling to maximal concentrations of <0.30 μg l-1. Euphotic zone integrated primary production (IPP, ca. 118 to 389 mg C m-2 d-1), and algal turnover rate (Pμ, ca. 0.27 to 0.76 d-1) responded to the upwelling ∼5 h earlier than chlorophyll. The observed uncoupling between upwelled nutrients and the low chlorophyll phenomenon might be due to quick tidal mixing and shorter residence time of the water mass (<1 d) within the bay, in comparison to the algal turnover time (1.3 to 3.7 d). Euphotic zone integrated bacterial production (17 to 28 mg C m-2 d-1) and bacterial turnover rate (0.6 to 0.8 d-1) were positively correlated with IPP, Pμ and depth integrated particulate organic carbon (ca. 540 to 6575 mg C m-2) concentrations, suggesting a high possibility of 'bottom-up' (organic substrate supply) control. This was confirmed by the results of 3 enrichment experiments showing that bacterial growth was C limited. Our study provides mechanistic information regarding the magnitude of the interaction between physical, chemical and biological processes, since the time scale adopted by this study encompasses the turnover times of auto- and heterotrophic plankton.

Original languageEnglish
Pages (from-to)91-100
Number of pages10
JournalMarine Ecology Progress Series
Volume304
DOIs
Publication statusPublished - 2005 Dec 8

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bacterioplankton
tides
biomass production
turnover
upwelling
tide
phytoplankton
euphotic zone
chlorophyll
biomass
timescale
automobiles
plankton
microbial growth
primary productivity
Taiwan
particulate organic carbon
chemical process
nitrates
biological processes

Keywords

  • Bacterioplankton
  • C-limitation
  • Chlorophyll
  • Dissolved inorganic nutrients
  • POC
  • Taiwan
  • Tidal cycle
  • Upwelling

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Aquatic Science
  • Ecology

Cite this

Phytoplankton and bacterioplankton biomass, production and turnover in a semi-enclosed embayment with spring tide induced upwelling. / Chen, Chung Chi; Shiah, Fuh Kwo; Lee, Hung Jen; Li, Kuo Yuan; Meng, Pei Jie; Kao, Shui Ji; Tseng, Yu Fang; Chung, Chia Lu.

In: Marine Ecology Progress Series, Vol. 304, 08.12.2005, p. 91-100.

Research output: Contribution to journalArticle

Chen, Chung Chi ; Shiah, Fuh Kwo ; Lee, Hung Jen ; Li, Kuo Yuan ; Meng, Pei Jie ; Kao, Shui Ji ; Tseng, Yu Fang ; Chung, Chia Lu. / Phytoplankton and bacterioplankton biomass, production and turnover in a semi-enclosed embayment with spring tide induced upwelling. In: Marine Ecology Progress Series. 2005 ; Vol. 304. pp. 91-100.
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AU - Li, Kuo Yuan

AU - Meng, Pei Jie

AU - Kao, Shui Ji

AU - Tseng, Yu Fang

AU - Chung, Chia Lu

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N2 - We examined the short time scale (i.e. hours to days) responses of phytoplankton and heterotrophic bacteria to a spring tide-driven upwelling, which is different from classical wind-driven systems, in southern Taiwan in a semi-enclosed embayment. Results showed that nitrate concentrations (NO 3-, <0.15 to 10.2 μM) correlated negatively with temperature (ca. 16 to 26°C). Estimated NO3- flux upwelled from >70 m was ∼60 mmol N m-2 h-1 with <1 % of it utilized by phytoplankton. Chlorophyll a concentrations doubled from 0.07 to 0.16 μg l-1 in the 9 h after the upwelling to maximal concentrations of <0.30 μg l-1. Euphotic zone integrated primary production (IPP, ca. 118 to 389 mg C m-2 d-1), and algal turnover rate (Pμ, ca. 0.27 to 0.76 d-1) responded to the upwelling ∼5 h earlier than chlorophyll. The observed uncoupling between upwelled nutrients and the low chlorophyll phenomenon might be due to quick tidal mixing and shorter residence time of the water mass (<1 d) within the bay, in comparison to the algal turnover time (1.3 to 3.7 d). Euphotic zone integrated bacterial production (17 to 28 mg C m-2 d-1) and bacterial turnover rate (0.6 to 0.8 d-1) were positively correlated with IPP, Pμ and depth integrated particulate organic carbon (ca. 540 to 6575 mg C m-2) concentrations, suggesting a high possibility of 'bottom-up' (organic substrate supply) control. This was confirmed by the results of 3 enrichment experiments showing that bacterial growth was C limited. Our study provides mechanistic information regarding the magnitude of the interaction between physical, chemical and biological processes, since the time scale adopted by this study encompasses the turnover times of auto- and heterotrophic plankton.

AB - We examined the short time scale (i.e. hours to days) responses of phytoplankton and heterotrophic bacteria to a spring tide-driven upwelling, which is different from classical wind-driven systems, in southern Taiwan in a semi-enclosed embayment. Results showed that nitrate concentrations (NO 3-, <0.15 to 10.2 μM) correlated negatively with temperature (ca. 16 to 26°C). Estimated NO3- flux upwelled from >70 m was ∼60 mmol N m-2 h-1 with <1 % of it utilized by phytoplankton. Chlorophyll a concentrations doubled from 0.07 to 0.16 μg l-1 in the 9 h after the upwelling to maximal concentrations of <0.30 μg l-1. Euphotic zone integrated primary production (IPP, ca. 118 to 389 mg C m-2 d-1), and algal turnover rate (Pμ, ca. 0.27 to 0.76 d-1) responded to the upwelling ∼5 h earlier than chlorophyll. The observed uncoupling between upwelled nutrients and the low chlorophyll phenomenon might be due to quick tidal mixing and shorter residence time of the water mass (<1 d) within the bay, in comparison to the algal turnover time (1.3 to 3.7 d). Euphotic zone integrated bacterial production (17 to 28 mg C m-2 d-1) and bacterial turnover rate (0.6 to 0.8 d-1) were positively correlated with IPP, Pμ and depth integrated particulate organic carbon (ca. 540 to 6575 mg C m-2) concentrations, suggesting a high possibility of 'bottom-up' (organic substrate supply) control. This was confirmed by the results of 3 enrichment experiments showing that bacterial growth was C limited. Our study provides mechanistic information regarding the magnitude of the interaction between physical, chemical and biological processes, since the time scale adopted by this study encompasses the turnover times of auto- and heterotrophic plankton.

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