Marine phytoplankton in subtropical coastal waters showing lower thermal sensitivity than microzooplankton

Kailin Liu, Bingzhang Chen, Shuwen Zhang, Mitsuhide Sato, Zhiyuan Shi, Hongbin Liu

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Temperature sensitivity of plankton in terms of activation energy (Ea, eV) in the Arrhenius equation is critical for predicting how marine productivity and carbon export will respond to ocean warming. In this study, we quantified the temperature responses of phytoplankton growth rate and microzooplankton grazing rate by conducting short-term temperature modulation experiments on natural communities at two subtropical sites with contrasting nutrient conditions. Our results showed that the activation energy of phytoplankton growth rate (Ea = 0.36 eV, 95% confidence interval [CI] = 0.28–0.44 eV) at each station was less than that of microzooplankton grazing rate (Ea = 0.53 eV, 95% CI = 0.47–0.59 eV), indicating an increasing grazing pressure on phytoplankton under warming conditions. Although the difference is consistent with that reported in previous studies, it is very likely to arise from another reason, i.e., differential proximities of the optimal temperature (Topt in nonlinear temperature responses of rates) of phytoplankton and microzooplankton to the environmental temperature, as we found that the environmental temperature is closer to the optimal temperature of phytoplankton growth than to that of microzooplankton grazing in this subtropical environment. Our results suggest that nonlinear temperature responses of plankton should be considered when evaluating and predicting the effects of ocean warming on ecosystem productivity and food web dynamics, especially in subtropical and tropical waters.
LanguageEnglish
Pages1103-1119
Number of pages17
JournalLimnology and Oceanography
Volume64
Issue number3
Early online date14 Dec 2018
DOIs
Publication statusPublished - 31 May 2019

Fingerprint

Phytoplankton
coastal water
phytoplankton
heat
Water
grazing
temperature
activation energy
Plankton
warming
plankton
confidence interval
Activation Energy
ambient temperature
oceans
Ocean
Productivity
Confidence interval
Food Web
productivity

Keywords

  • phytoplankton
  • temperature
  • microzooplankton

Cite this

Liu, Kailin ; Chen, Bingzhang ; Zhang, Shuwen ; Sato, Mitsuhide ; Shi, Zhiyuan ; Liu, Hongbin. / Marine phytoplankton in subtropical coastal waters showing lower thermal sensitivity than microzooplankton. In: Limnology and Oceanography . 2019 ; Vol. 64, No. 3. pp. 1103-1119.
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abstract = "Temperature sensitivity of plankton in terms of activation energy (Ea, eV) in the Arrhenius equation is critical for predicting how marine productivity and carbon export will respond to ocean warming. In this study, we quantified the temperature responses of phytoplankton growth rate and microzooplankton grazing rate by conducting short-term temperature modulation experiments on natural communities at two subtropical sites with contrasting nutrient conditions. Our results showed that the activation energy of phytoplankton growth rate (Ea = 0.36 eV, 95{\%} confidence interval [CI] = 0.28–0.44 eV) at each station was less than that of microzooplankton grazing rate (Ea = 0.53 eV, 95{\%} CI = 0.47–0.59 eV), indicating an increasing grazing pressure on phytoplankton under warming conditions. Although the difference is consistent with that reported in previous studies, it is very likely to arise from another reason, i.e., differential proximities of the optimal temperature (Topt in nonlinear temperature responses of rates) of phytoplankton and microzooplankton to the environmental temperature, as we found that the environmental temperature is closer to the optimal temperature of phytoplankton growth than to that of microzooplankton grazing in this subtropical environment. Our results suggest that nonlinear temperature responses of plankton should be considered when evaluating and predicting the effects of ocean warming on ecosystem productivity and food web dynamics, especially in subtropical and tropical waters.",
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Marine phytoplankton in subtropical coastal waters showing lower thermal sensitivity than microzooplankton. / Liu, Kailin; Chen, Bingzhang; Zhang, Shuwen; Sato, Mitsuhide; Shi, Zhiyuan; Liu, Hongbin.

In: Limnology and Oceanography , Vol. 64, No. 3, 31.05.2019, p. 1103-1119.

Research output: Contribution to journalArticle

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AU - Sato, Mitsuhide

AU - Shi, Zhiyuan

AU - Liu, Hongbin

N1 - This is the peer reviewed version of the following article: Liu, K, Chen, B, Zhang, S, Sato, M, Shi, Z & Liu, H 2018, 'Marine phytoplankton in subtropical coastal waters showing lower thermal sensitivity than microzooplankton' Limnology and Oceanography, pp. 1-17, which has been published in final form at https://doi.org/10.1002/lno.11101. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions.

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Y1 - 2019/5/31

N2 - Temperature sensitivity of plankton in terms of activation energy (Ea, eV) in the Arrhenius equation is critical for predicting how marine productivity and carbon export will respond to ocean warming. In this study, we quantified the temperature responses of phytoplankton growth rate and microzooplankton grazing rate by conducting short-term temperature modulation experiments on natural communities at two subtropical sites with contrasting nutrient conditions. Our results showed that the activation energy of phytoplankton growth rate (Ea = 0.36 eV, 95% confidence interval [CI] = 0.28–0.44 eV) at each station was less than that of microzooplankton grazing rate (Ea = 0.53 eV, 95% CI = 0.47–0.59 eV), indicating an increasing grazing pressure on phytoplankton under warming conditions. Although the difference is consistent with that reported in previous studies, it is very likely to arise from another reason, i.e., differential proximities of the optimal temperature (Topt in nonlinear temperature responses of rates) of phytoplankton and microzooplankton to the environmental temperature, as we found that the environmental temperature is closer to the optimal temperature of phytoplankton growth than to that of microzooplankton grazing in this subtropical environment. Our results suggest that nonlinear temperature responses of plankton should be considered when evaluating and predicting the effects of ocean warming on ecosystem productivity and food web dynamics, especially in subtropical and tropical waters.

AB - Temperature sensitivity of plankton in terms of activation energy (Ea, eV) in the Arrhenius equation is critical for predicting how marine productivity and carbon export will respond to ocean warming. In this study, we quantified the temperature responses of phytoplankton growth rate and microzooplankton grazing rate by conducting short-term temperature modulation experiments on natural communities at two subtropical sites with contrasting nutrient conditions. Our results showed that the activation energy of phytoplankton growth rate (Ea = 0.36 eV, 95% confidence interval [CI] = 0.28–0.44 eV) at each station was less than that of microzooplankton grazing rate (Ea = 0.53 eV, 95% CI = 0.47–0.59 eV), indicating an increasing grazing pressure on phytoplankton under warming conditions. Although the difference is consistent with that reported in previous studies, it is very likely to arise from another reason, i.e., differential proximities of the optimal temperature (Topt in nonlinear temperature responses of rates) of phytoplankton and microzooplankton to the environmental temperature, as we found that the environmental temperature is closer to the optimal temperature of phytoplankton growth than to that of microzooplankton grazing in this subtropical environment. Our results suggest that nonlinear temperature responses of plankton should be considered when evaluating and predicting the effects of ocean warming on ecosystem productivity and food web dynamics, especially in subtropical and tropical waters.

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SN - 0024-3590

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