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Effect of increasing sea water temperature on the growth and toxin production of the benthic dinoflagellate Prorocentrum lima

Effect of increasing sea water temperature on the growth and toxin production of the benthic dinoflagellate Prorocentrum lima
Effect of increasing sea water temperature on the growth and toxin production of the benthic dinoflagellate Prorocentrum lima
In future decades, harmful algae blooms may increase in frequency in aquatic environments as a result of higher global temperatures (warming). This study tested the hypothesis that cell growth rate and Diarrethic Shellfish Poisoning (DSP) toxin (okadaic acid, OA; dinophysistoxin 1, DTX1) per cell of the benthic dinoflagellate Prorocentrum lima increases with temperature. P. lima cells were grown in f/2 medium at irradiances of 50 ± 15 µmol m−2 s−1 and photoperiod of 12 h L:12 h D. Cell abundance, photosynthetic efficiency (Fv/Fm), and nutrient consumption (NO3− + NO2− and PO43−) were also determined. P. lima optimum growth temperature was at 15 and 25°C but the highest Fv/Fm values showed no association to the maximum growth rate. P. lima showed lower cell growth rates and Fv/Fm values at both 5 and 30°C. Only free OA concentration per cell showed an increase with temperature up to 15°C. Highest lipophilic toxicity in P. lima was found during the stationary growth phase at low (10–15°C) and elevated (30°C) temperatures. Results from this study suggest that future changes to climatic conditions in coastal waters may lead to higher growth rates and cellular toxin levels in P. lima populations worldwide.
0018-8158
Aquino-Cruz, Aldo
75144173-caaf-4d11-8976-231ccc6699d0
Purdie, Duncan A.
18820b32-185a-467a-8019-01f245191cd8
Morris, Steve
8f43c579-0c0f-4875-9974-1a825c467aa6
Aquino-Cruz, Aldo
75144173-caaf-4d11-8976-231ccc6699d0
Purdie, Duncan A.
18820b32-185a-467a-8019-01f245191cd8
Morris, Steve
8f43c579-0c0f-4875-9974-1a825c467aa6

Aquino-Cruz, Aldo, Purdie, Duncan A. and Morris, Steve (2018) Effect of increasing sea water temperature on the growth and toxin production of the benthic dinoflagellate Prorocentrum lima. Hydrobiologia. (doi:10.1007/s10750-018-3512-4).

Record type: Article

Abstract

In future decades, harmful algae blooms may increase in frequency in aquatic environments as a result of higher global temperatures (warming). This study tested the hypothesis that cell growth rate and Diarrethic Shellfish Poisoning (DSP) toxin (okadaic acid, OA; dinophysistoxin 1, DTX1) per cell of the benthic dinoflagellate Prorocentrum lima increases with temperature. P. lima cells were grown in f/2 medium at irradiances of 50 ± 15 µmol m−2 s−1 and photoperiod of 12 h L:12 h D. Cell abundance, photosynthetic efficiency (Fv/Fm), and nutrient consumption (NO3− + NO2− and PO43−) were also determined. P. lima optimum growth temperature was at 15 and 25°C but the highest Fv/Fm values showed no association to the maximum growth rate. P. lima showed lower cell growth rates and Fv/Fm values at both 5 and 30°C. Only free OA concentration per cell showed an increase with temperature up to 15°C. Highest lipophilic toxicity in P. lima was found during the stationary growth phase at low (10–15°C) and elevated (30°C) temperatures. Results from this study suggest that future changes to climatic conditions in coastal waters may lead to higher growth rates and cellular toxin levels in P. lima populations worldwide.

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More information

Accepted/In Press date: 12 January 2018
e-pub ahead of print date: 22 January 2018

Identifiers

Local EPrints ID: 417141
URI: https://eprints.soton.ac.uk/id/eprint/417141
ISSN: 0018-8158
PURE UUID: b1e2dd99-503f-4320-a581-e9d27d992eb4

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Date deposited: 22 Jan 2018 17:30
Last modified: 31 Jan 2018 17:30

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