Temperature effects on growth and buoyancy of Microcystis aeruginosa

Jiaqi You, Kevin Mallery, Jiarong Hong, Miki Hondzo

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

Abstract

Batch cultures of Microcystis aeruginosa (M. aeruginosa) were cultivated at seven different temperatures to measure the specific growth rate at each temperature. A relationship between temperature and specific growth rate was established. We propose a cardinal temperature model for M. aeruginosa with the inflection point (optimal temperature) located at 27.5°C. The model describes 98% of the variability of experimental data from 5°C to 35°C. A digital inline holographic microscope was employed to visualize and analyze the buoyancy of the M. aeruginosa colonies at two different temperatures. The results demonstrated a five times difference in buoyant velocities of colonies at 17.5°C and 28°C. A model was derived to calculate the density of a colony using the buoyant velocity and colony size. The findings provide a better understanding of temperature effects on the growth and buoyancy of M. aeruginosa. The results could facilitate the prediction and mitigation of harmful algal blooms in aquatic ecosystems.

Original languageEnglish (US)
Pages (from-to)16-28
Number of pages13
JournalJournal of Plankton Research
Volume40
Issue number1
DOIs
StatePublished - Jan 1 2018

Bibliographical note

Funding Information:
body “Legislative-Citizen Commission on Minnesota”. This is a state funding body from the United States of America. “National Robotics Initiative Award (#1427014): Collaborative Research: Robotics 2.0 for Disaster Response and Relief Operations” from the funding body “National Science Foundation” from the United States of America.

Keywords

  • Microcystis
  • buoyancy
  • growth rate
  • holography
  • temperature

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