Effect of temperature on the unimodal size scaling of phytoplankton growth

Abstract Contrary to predictions by the allometric theory, there is evidence that phytoplankton growth rates peak at intermediate cell sizes. However, it is still unknown if this pattern may result from the effect of experimental temperature. Here we test whether temperature affects the unimodal siz...

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Autores principales:	Cristina Fernández-González, Emilio Marañón
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/017955979fb149ab93c77859f660150d
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spelling	oai:doaj.org-article:017955979fb149ab93c77859f660150d2021-12-02T14:02:33ZEffect of temperature on the unimodal size scaling of phytoplankton growth10.1038/s41598-020-79616-02045-2322https://doaj.org/article/017955979fb149ab93c77859f660150d2021-01-01T00:00:00Zhttps://doi.org/10.1038/s41598-020-79616-0https://doaj.org/toc/2045-2322Abstract Contrary to predictions by the allometric theory, there is evidence that phytoplankton growth rates peak at intermediate cell sizes. However, it is still unknown if this pattern may result from the effect of experimental temperature. Here we test whether temperature affects the unimodal size scaling pattern of phytoplankton growth by (1) growing Synechococcus sp., Ostreococcus tauri, Micromonas commoda and Pavlova lutheri at 18 °C and 25 °C, and (2) using thermal response curves available in the literature to estimate the growth rate at 25 °C as well as the maximum growth rate at optimal temperature for 22 species assayed previously at 18 °C. We also assess the sensitivity of growth rate estimates to the metric employed for measuring standing stocks, by calculating growth rates based on in vivo fluorescence, chlorophyll a concentration, cell abundance and biomass (particulate organic carbon and nitrogen content). Our results show that the unimodal size scaling pattern of phytoplankton growth, with a peak at intermediate cell sizes, is observed at 18 °C, 25 °C and at the optimal temperature for growth, and that it prevails irrespective of the standing-stock metric used. The unimodal size scaling pattern of phytoplankton growth is supported by two independent field observations reported in the literature: (i) a positive relationship between cell size and metabolic rate in the picophytoplankton size range and (ii) the dominance of intermediate-size cells in nutrient-rich waters during blooms.Cristina Fernández-GonzálezEmilio MarañónNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-9 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Cristina Fernández-González Emilio Marañón Effect of temperature on the unimodal size scaling of phytoplankton growth
description	Abstract Contrary to predictions by the allometric theory, there is evidence that phytoplankton growth rates peak at intermediate cell sizes. However, it is still unknown if this pattern may result from the effect of experimental temperature. Here we test whether temperature affects the unimodal size scaling pattern of phytoplankton growth by (1) growing Synechococcus sp., Ostreococcus tauri, Micromonas commoda and Pavlova lutheri at 18 °C and 25 °C, and (2) using thermal response curves available in the literature to estimate the growth rate at 25 °C as well as the maximum growth rate at optimal temperature for 22 species assayed previously at 18 °C. We also assess the sensitivity of growth rate estimates to the metric employed for measuring standing stocks, by calculating growth rates based on in vivo fluorescence, chlorophyll a concentration, cell abundance and biomass (particulate organic carbon and nitrogen content). Our results show that the unimodal size scaling pattern of phytoplankton growth, with a peak at intermediate cell sizes, is observed at 18 °C, 25 °C and at the optimal temperature for growth, and that it prevails irrespective of the standing-stock metric used. The unimodal size scaling pattern of phytoplankton growth is supported by two independent field observations reported in the literature: (i) a positive relationship between cell size and metabolic rate in the picophytoplankton size range and (ii) the dominance of intermediate-size cells in nutrient-rich waters during blooms.
format	article
author	Cristina Fernández-González Emilio Marañón
author_facet	Cristina Fernández-González Emilio Marañón
author_sort	Cristina Fernández-González
title	Effect of temperature on the unimodal size scaling of phytoplankton growth
title_short	Effect of temperature on the unimodal size scaling of phytoplankton growth
title_full	Effect of temperature on the unimodal size scaling of phytoplankton growth
title_fullStr	Effect of temperature on the unimodal size scaling of phytoplankton growth
title_full_unstemmed	Effect of temperature on the unimodal size scaling of phytoplankton growth
title_sort	effect of temperature on the unimodal size scaling of phytoplankton growth
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/017955979fb149ab93c77859f660150d
work_keys_str_mv	AT cristinafernandezgonzalez effectoftemperatureontheunimodalsizescalingofphytoplanktongrowth AT emiliomaranon effectoftemperatureontheunimodalsizescalingofphytoplanktongrowth
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Effect of temperature on the unimodal size scaling of phytoplankton growth

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