Response of Natural Cyanobacteria and Algae Assemblages to a Nutrient Pulse and Elevated Temperature

Frontiers in Microbiology
Miquel LürlingMarcelo M Marinho

Abstract

Eutrophication (nutrient over-enrichment) is the primary worldwide water quality issue often leading to nuisance cyanobacterial blooms. Climate change is predicted to cause further rise of cyanobacteria blooms as cyanobacteria can have a competitive advantage at elevated temperatures. We tested the hypothesis that simultaneous rise in nutrients and temperature will promote cyanobacteria more than a single increase in one of the two drivers. To this end, controlled experiments were run with seston from 39 different urban water bodies varying in trophic state from mesotrophic to hypertrophic. These experiments were carried out at two different temperatures, 20°C (ambient) and 25°C (warming scenario) with or without the addition of a surplus of nutrients (eutrophication scenario). To facilitate comparisons, we quantified the effect size of the different treatments, using cyanobacterial and algal chlorophyll a concentrations as a response variable. Cyanobacterial and algal chlorophyll a concentrations were determined with a PHYTO-PAM phytoplankton analyzer. Warming caused an 18% increase in cyanobacterial chlorophyll-a, while algal chlorophyll-a concentrations were on average 8% higher at 25°C than at 20°C. A nutrient pulse had a m...Continue Reading

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Citations

Jun 28, 2020·Environmental Science and Pollution Research International·Aloysio S Ferrão-FilhoMarcelo M Marinho
Jan 30, 2020·Frontiers in Microbiology·Carmen EspinosaLaia Llenas
Nov 27, 2020·FEMS Microbiology Ecology·Fernanda Rios JacinaviciusErnani Pinto
Nov 25, 2020·The Science of the Total Environment·Andrés Beretta-Blanco, Leonidas Carrasco-Letelier
Feb 15, 2020·Water Research·Marco J CabrerizoJuan M González-Olalla
Dec 11, 2020·Harmful Algae·Kaitlin L ReinlSandra Brovold
Dec 20, 2021·The Science of the Total Environment·Alessandra L SuzziMegan J Huggett

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Software Mentioned

- PAM
- ED
Systat
PAM
SigmaPlot
PHYTO
SPSS

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