Primary production of lake phytoplankton, dominated by the cyanobacterium Cylindrospermopsis raciborskii, in response to irradiance and temperature

Kehoe, M., O'Brien, K. R., Grinham, A. and Burford, M. A. (2015) Primary production of lake phytoplankton, dominated by the cyanobacterium Cylindrospermopsis raciborskii, in response to irradiance and temperature. Inland Waters, 5 2: 93-100. doi:10.5268/IW-5.2.778

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Author Kehoe, M.
O'Brien, K. R.
Grinham, A.
Burford, M. A.
Title Primary production of lake phytoplankton, dominated by the cyanobacterium Cylindrospermopsis raciborskii, in response to irradiance and temperature
Formatted title
Primary production of lake phytoplankton, dominated by the cyanobacterium Cylindrospermopsis raciborskii, in response to irradiance and temperature
Journal name Inland Waters
ISSN 2044-2041
2044-205X
Publication date 2015
Sub-type Article (original research)
DOI 10.5268/IW-5.2.778
Open Access Status
Volume 5
Issue 2
Start page 93
End page 100
Total pages 8
Place of publication Ambleside, Cumbria, United Kingdom
Publisher Freshwater Biological Association
Collection year 2016
Language eng
Formatted abstract
We present the first data on the interacting effect of temperature and light on primary production of the toxic cyanobacterium
Cylindrospermopsis raciborskii in situ. C. raciborskii can be a dominant component of the phytoplankton community in tropical and subtropical lakes and reservoirs. We examined the interacting effects of a range of light (0, 2, 7, 17, 30, and 100% of ambient light) and temperature (20, 24, 28, and 32 °C) conditions, in terms of primary production rate and primary production irradiance model parameters, for a C. raciborskii-dominated phytoplankton community in a subtropical reservoir. Based on 13C-uptake experiments, phytoplankton preconditioned to temperatures between 24 and 26 °C had highest maximum primary production rates (2.25 ± 0.45 µg C µg Chl-a−1 h−1) at 28 °C and lowest at 32 °C (0.58 ± 0.13 µg C µg Chl-a−1 h−1). Temperature also had an effect on the response to light conditions. Phytoplankton preconditioned to a shallow euphotic depth (~2.3 m deep) had the lowest half saturation of primary production, Ik, at 28 °C and highest at 32 °C, while the highest temperature treatment also had the highest level of photoinhibition at 100% of ambient light. This suggests that the cyanobacterial community is adapted to a low light environment under optimal temperature conditions for primary productivity. These conditions are consistent with other studies showing that C. raciborskii is highly adapted to low light conditions. This work demonstrates the importance of considering temperature when comparing calibrated primary production parameters.
Keyword Cylindrospermopsisraciborskii
Natural population
P-I curves
Primary production
Temperature
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes https://www.fba.org.uk/journals/index.php/IW/article/view/778

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Civil Engineering Publications
School of Chemical Engineering Publications
Official 2016 Collection
 
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Citation counts: TR Web of Science Citation Count  Cited 6 times in Thomson Reuters Web of Science Article | Citations
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Created: Wed, 04 Feb 2015, 15:42:48 EST by Dr Kate O'brien on behalf of School of Chemical Engineering