Modelling the impact of higher temperature on the phytoplankton of a boreal lake
Pätynen, A., Elliott, J., Kiuru, P., Sarvala, J., Ventelä, A., & Jones, R. (2014). Modelling the impact of higher temperature on the phytoplankton of a boreal lake. BOREAL ENVIRONMENT RESEARCH, 19 (1), 66-78. Retrieved from http://www.borenv.net/BER/pdfs/ber19/ber19-066.pdf
Published in
Boreal Environment ResearchAuthors
Date
2014Discipline
Akvaattiset tieteetWe linked the models PROTECH and MyLake to test potential impacts of climate-changeinduced
warming on the phytoplankton community of Pyhäjärvi, a lake in southwest Finland.
First, we calibrated the models for the present conditions, which revealed an apparent
high significance of internal nutrient loading for Pyhäjärvi. We then estimated the effect
of two climate change scenarios on lake water temperatures and ice cover duration with
MyLake. Finally, we used those outputs to drive PROTECH to predict the resultant phytoplankton
community. It was evident that cyanobacteria will grow significantly better in
warmer water, especially in the summer. Even if phosphorus and nitrogen loads to the lake
remain the same and there is little change in the total chlorophyll a concentrations, a higher
proportion of the phytoplankton community could be dominated by cyanobacteria. The
model outputs provided no clear evidence that earlier ice break would advance the timing
of the diatom spring bloom.
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Publisher
Boreal Environment Research Publishing BoardISSN Search the Publication Forum
1239-6095