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Stress due to low nitrate availability reduces the biochemical acclimation potential of the giant kelp Macrocystis pyrifera to high temperature

Citation

Schmid, M and Fernandez, PA and Gaitan-Espitia, JD and Virtue, P and Leal, PP and Revill, AT and Nichols, PD and Hurd, CL, Stress due to low nitrate availability reduces the biochemical acclimation potential of the giant kelp Macrocystis pyrifera to high temperature, Algal Research, 47 Article 101895. ISSN 2211-9264 (2020) [Refereed Article]

Copyright Statement

2020 Elsevier B.V. All rights reserved.

DOI: doi:10.1016/j.algal.2020.101895

Abstract

The performance and survival of macroalgae is largely determined by their ability to adjust to varying environmental conditions. In this study, we investigated the short-term response of the giant kelp Macrocystis pyrifera to varying temperatures (6, 17 and 24C) and low and high nitrate conditions (5μM and 80μM nitrate) on lipid and fatty acid levels. Results revealed that M. pyrifera was able to rapidly adjust to varying temperatures by changing the saturation level of the fatty acid composition at low and high nitrate conditions. On a lipid level, we observed interactive effects of temperature and nutrient conditions. Under high nitrate conditions, M. pyrifera maintained the same lipid profile. However, under low nitrate and high temperature conditions, an increase in free fatty acids (FFA) was observed, indicative of lipid degeneration at high temperatures. Results show that low nitrogen concentrations can magnify the negative effects of short term temperature stress in the giant kelp M. pyrifera. Our findings indicate that under rapid warming events, local nitrate availability might be a decisive factor for the acclimation potential of M. pyrifera.

Item Details

Item Type:Refereed Article
Keywords:Macrocystis, giant kelp, nitrogen, fatty acids, climate change, ocean warming, eutrophication, thermal stress, nutrients
Research Division:Biological Sciences
Research Group:Plant biology
Research Field:Phycology (incl. marine grasses)
Objective Division:Environmental Policy, Climate Change and Natural Hazards
Objective Group:Adaptation to climate change
Objective Field:Ecosystem adaptation to climate change
UTAS Author:Schmid, M (Dr Matthias Schmid)
UTAS Author:Fernandez, PA (Ms Pamela Fernandez Subiabre)
UTAS Author:Virtue, P (Associate Professor Patti Virtue)
UTAS Author:Nichols, PD (Dr Peter Nichols)
UTAS Author:Hurd, CL (Professor Catriona Hurd)
ID Code:139413
Year Published:2020
Web of Science® Times Cited:4
Deposited By:Ecology and Biodiversity
Deposited On:2020-06-15
Last Modified:2020-12-22
Downloads:0

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