Interactive effects of light, CO2 and temperature on growth and resource partitioning by the mixotrophic dinoflagellate, Karlodinium veneficum

Autor: Lauren R. Salvitti, Kathryn J. Coyne, Mark E. Warner, Gulnihal Ozbay, Alicia M. Mangum, Christopher R. Main, Zohreh Mazaheri Kouhanestani
Rok vydání: 2021
Předmět:
Atmospheric Science
Hot Temperature
Light
Predation
Plant Science
Biochemistry
chemistry.chemical_compound
Nutrient
Biomass
Photosynthesis
Materials
Trophic level
Climatology
Multidisciplinary
Ecology
Plant Biochemistry
Physics
Electromagnetic Radiation
Eukaryota
Protists
Eutrophication
Plants
Plankton
Nitrogen
Dinoflagellates
Trophic Interactions
Chemistry
Particulates
Community Ecology
Environmental chemistry
Carbon dioxide
Physical Sciences
Dinoflagellida
Sunlight
Medicine
Research Article
Algae
Science
Climate Change
Materials Science
chemistry.chemical_element
pCO2
Phytoplankton
Animals
Ribulose-1
5-Bisphosphate Carboxylase Oxygenase
Ecology and Environmental Sciences
Chemical Compounds
Organisms
Biology and Life Sciences
Carbon Dioxide
Invertebrates
chemistry
Mixtures
Earth Sciences
Carbon
Zoology
Mixotroph
Zdroj: PLoS ONE
PLoS ONE, Vol 16, Iss 10 (2021)
PLoS ONE, Vol 16, Iss 10, p e0259161 (2021)
ISSN: 1932-6203
Popis: There is little information on the impacts of climate change on resource partitioning for mixotrophic phytoplankton. Here, we investigated the hypothesis that light interacts with temperature and CO2 to affect changes in growth and cellular carbon and nitrogen content of the mixotrophic dinoflagellate, Karlodinium veneficum, with increasing cellular carbon and nitrogen content under low light conditions and increased growth under high light conditions. Using a multifactorial design, the interactive effects of light, temperature and CO2 were investigated on K. veneficum at ambient temperature and CO2 levels (25°C, 375 ppm), high temperature (30°C, 375 ppm CO2), high CO2 (30°C, 750 ppm CO2), or a combination of both high temperature and CO2 (30°C, 750 ppm CO2) at low light intensities (LL: 70 μmol photons m-2 s-2) and light-saturated conditions (HL: 140 μmol photons m-2 s-2). Results revealed significant interactions between light and temperature for all parameters. Growth rates were not significantly different among LL treatments, but increased significantly with temperature or a combination of elevated temperature and CO2 under HL compared to ambient conditions. Particulate carbon and nitrogen content increased in response to temperature or a combination of elevated temperature and CO2 under LL conditions, but significantly decreased in HL cultures exposed to elevated temperature and/or CO2 compared to ambient conditions at HL. Significant increases in C:N ratios were observed only in the combined treatment under LL, suggesting a synergistic effect of temperature and CO2 on carbon assimilation, while increases in C:N under HL were driven only by an increase in CO2. Results indicate light-driven variations in growth and nutrient acquisition strategies for K. veneficum that may benefit this species under anticipated climate change conditions (elevated light, temperature and pCO2) while also affecting trophic transfer efficiency during blooms of this species.
Databáze: OpenAIRE
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