Thermal constraints on growth, stoichiometry and lipid content of different groups of microalgae with bioenergy potential

Thermal constraints on growth, stoichiometry and lipid content of different groups of microalgae... Temperature has a range of effects on population demographic rates and physiology of microalgae for potential bioenergy application. The changes in microalgal growth, stoichiometry and cellular lipid contents of 14 different microalgae species with high bioenergy potentials in response to different temperature between 10 and 35 °C were investigated. For most of the chosen microalgae, the specific growth rate increased with temperature over most of the range. On the other hand, the biomass density of most of the selected species declined with temperature at stationary phase. Certain cyanobacteria failed to grow below 20 °C, while eukaryotes had a wider temperature range. Lipid content, by contrast, showed different responses to temperature among the 14 species. Nine of the species showed a positive response with increased temperature, while others showed neural or unimodal response. Cellular C:N and C:P ratios were mostly unimodally related to temperature. Some eukaryotic species showed the lowest total lipid contents but the highest C:N and C:P ratios, the fastest growth, and the highest biomass density at their stationary phases. The results indicated that the responses of the life history and cellular stoichiometry to temperature were more consistent across microalgae than that of total lipid content. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Applied Phycology Springer Journals

Thermal constraints on growth, stoichiometry and lipid content of different groups of microalgae with bioenergy potential

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Publisher
Springer Journals
Copyright
Copyright © 2017 by Springer Science+Business Media B.V., part of Springer Nature
Subject
Life Sciences; Plant Sciences; Freshwater & Marine Ecology; Plant Physiology; Ecology
ISSN
0921-8971
eISSN
1573-5176
D.O.I.
10.1007/s10811-017-1358-1
Publisher site
See Article on Publisher Site

Abstract

Temperature has a range of effects on population demographic rates and physiology of microalgae for potential bioenergy application. The changes in microalgal growth, stoichiometry and cellular lipid contents of 14 different microalgae species with high bioenergy potentials in response to different temperature between 10 and 35 °C were investigated. For most of the chosen microalgae, the specific growth rate increased with temperature over most of the range. On the other hand, the biomass density of most of the selected species declined with temperature at stationary phase. Certain cyanobacteria failed to grow below 20 °C, while eukaryotes had a wider temperature range. Lipid content, by contrast, showed different responses to temperature among the 14 species. Nine of the species showed a positive response with increased temperature, while others showed neural or unimodal response. Cellular C:N and C:P ratios were mostly unimodally related to temperature. Some eukaryotic species showed the lowest total lipid contents but the highest C:N and C:P ratios, the fastest growth, and the highest biomass density at their stationary phases. The results indicated that the responses of the life history and cellular stoichiometry to temperature were more consistent across microalgae than that of total lipid content.

Journal

Journal of Applied PhycologySpringer Journals

Published: Dec 17, 2017

References

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