Impact of increasing water temperature on growth, photosynthetic efficiency, nutrient consumption, and potential toxicity of Amphidinium cf. carterae and Coolia monotis (Dinoflagellata)

The effect of global warming on marine ecosystems may benefit the formation of harmful algal blooms. However, our understanding of the effect of higher water temperatures on the growth of harmful benthic dinoflagellates in the environment is practically unknown. The effect of increasing water temper...

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Autores principales:	Aquino-Cruz,Aldo, Okolodkov,Yuri B
Lenguaje:	English
Publicado:	Universidad de Valparaíso. Facultad de Ciencias del Mar 2016
Materias:	Amphidinium carterae Coolia monotis growth rate temperature toxicity
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-19572016000300008
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spelling	oai:scielo:S0718-195720160003000082017-01-05Impact of increasing water temperature on growth, photosynthetic efficiency, nutrient consumption, and potential toxicity of Amphidinium cf. carterae and Coolia monotis (Dinoflagellata)Aquino-Cruz,AldoOkolodkov,Yuri B Amphidinium carterae Coolia monotis growth rate temperature toxicity The effect of global warming on marine ecosystems may benefit the formation of harmful algal blooms. However, our understanding of the effect of higher water temperatures on the growth of harmful benthic dinoflagellates in the environment is practically unknown. The effect of increasing water temperatures from 5 to 30°C on the growth of two strains of benthic dinoflagellates (Amphidinium cf. carterae and Coolia monotis) isolated from the Fleet Lagoon, Dorset, south of England, was investigated, and their potential toxicity was assessed using two types of bioassays (mortality of the copepod Tigriopus californicus and haemolytic activity of chicken red blood cells). Benthic dinoflagellate strains were grown in f/2 medium at irradiances of 35-70 µmol m-2 s-1 and under a 12h L:12h D photoperiod. Cell abundance, maximum quantum yield of photosystem II (Fv/Fm), nutrient consumption (N-NO3 + N-NO2 and P-PO4), and growth rates were determined in dinoflagellate cultures at growth temperatures between 5 and 30°C. Increasing water temperatures caused increased growth rates of the species. Elevated temperatures (25-30°C) were linked to the optimum growth of A. cf. carterae, while maximal growth rates in C. monotis were recorded between 15 and 25°C. A. cf. carterae had significantly higher growth rates than C. monotis. Declining Fv/Fm values indicated unsuitable growth conditions in culture for both species. The highest Fv/Fm values recorded had no relation to the optimum growth temperature for either species. Copepod mortality and lysis of erythrocytes confirmed that both dinoflagellate species may produce chemical compounds with potentially noxious effects.info:eu-repo/semantics/openAccessUniversidad de Valparaíso. Facultad de Ciencias del MarRevista de biología marina y oceanografía v.51 n.3 20162016-12-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-19572016000300008en10.4067/S0718-19572016000300008
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Amphidinium carterae Coolia monotis growth rate temperature toxicity
spellingShingle	Amphidinium carterae Coolia monotis growth rate temperature toxicity Aquino-Cruz,Aldo Okolodkov,Yuri B Impact of increasing water temperature on growth, photosynthetic efficiency, nutrient consumption, and potential toxicity of Amphidinium cf. carterae and Coolia monotis (Dinoflagellata)
description	The effect of global warming on marine ecosystems may benefit the formation of harmful algal blooms. However, our understanding of the effect of higher water temperatures on the growth of harmful benthic dinoflagellates in the environment is practically unknown. The effect of increasing water temperatures from 5 to 30°C on the growth of two strains of benthic dinoflagellates (Amphidinium cf. carterae and Coolia monotis) isolated from the Fleet Lagoon, Dorset, south of England, was investigated, and their potential toxicity was assessed using two types of bioassays (mortality of the copepod Tigriopus californicus and haemolytic activity of chicken red blood cells). Benthic dinoflagellate strains were grown in f/2 medium at irradiances of 35-70 µmol m-2 s-1 and under a 12h L:12h D photoperiod. Cell abundance, maximum quantum yield of photosystem II (Fv/Fm), nutrient consumption (N-NO3 + N-NO2 and P-PO4), and growth rates were determined in dinoflagellate cultures at growth temperatures between 5 and 30°C. Increasing water temperatures caused increased growth rates of the species. Elevated temperatures (25-30°C) were linked to the optimum growth of A. cf. carterae, while maximal growth rates in C. monotis were recorded between 15 and 25°C. A. cf. carterae had significantly higher growth rates than C. monotis. Declining Fv/Fm values indicated unsuitable growth conditions in culture for both species. The highest Fv/Fm values recorded had no relation to the optimum growth temperature for either species. Copepod mortality and lysis of erythrocytes confirmed that both dinoflagellate species may produce chemical compounds with potentially noxious effects.
author	Aquino-Cruz,Aldo Okolodkov,Yuri B
author_facet	Aquino-Cruz,Aldo Okolodkov,Yuri B
author_sort	Aquino-Cruz,Aldo
title	Impact of increasing water temperature on growth, photosynthetic efficiency, nutrient consumption, and potential toxicity of Amphidinium cf. carterae and Coolia monotis (Dinoflagellata)
title_short	Impact of increasing water temperature on growth, photosynthetic efficiency, nutrient consumption, and potential toxicity of Amphidinium cf. carterae and Coolia monotis (Dinoflagellata)
title_full	Impact of increasing water temperature on growth, photosynthetic efficiency, nutrient consumption, and potential toxicity of Amphidinium cf. carterae and Coolia monotis (Dinoflagellata)
title_fullStr	Impact of increasing water temperature on growth, photosynthetic efficiency, nutrient consumption, and potential toxicity of Amphidinium cf. carterae and Coolia monotis (Dinoflagellata)
title_full_unstemmed	Impact of increasing water temperature on growth, photosynthetic efficiency, nutrient consumption, and potential toxicity of Amphidinium cf. carterae and Coolia monotis (Dinoflagellata)
title_sort	impact of increasing water temperature on growth, photosynthetic efficiency, nutrient consumption, and potential toxicity of amphidinium cf. carterae and coolia monotis (dinoflagellata)
publisher	Universidad de Valparaíso. Facultad de Ciencias del Mar
publishDate	2016
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-19572016000300008
work_keys_str_mv	AT aquinocruzaldo impactofincreasingwatertemperatureongrowthphotosyntheticefficiencynutrientconsumptionandpotentialtoxicityofamphidiniumcfcarteraeandcooliamonotisdinoflagellata AT okolodkovyurib impactofincreasingwatertemperatureongrowthphotosyntheticefficiencynutrientconsumptionandpotentialtoxicityofamphidiniumcfcarteraeandcooliamonotisdinoflagellata
_version_	1714202363319812096

Impact of increasing water temperature on growth, photosynthetic efficiency, nutrient consumption, and potential toxicity of Amphidinium cf. carterae and Coolia monotis (Dinoflagellata)

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