Changes in dissolved oxygen concentration within colonies of Nostoc pruniforme measured with a fluorescence quenching microprobe
Arvidson B and Baker AL. 2017. Changes in dissolved oxygen concentration within colonies of Nostoc pruniforme measured with a fluorescence quenching microprobe. UNH Center for Freshwater Biology Research. :1-12
From the abstract: "1. Colonies of Nostoc pruniforme collected from a benthic lake population had dissolved oxygen (O2) concentration changes from anoxia in the dark to more than 103 μmol L-1 in the light, more than four times saturation level. Regardless of colony size (< 4 cm) similar patterns of increase or decrease O2 occurred during repeated light-dark cycles. 2. Most metabolic activity occurred within two hours of incubation in either light or dark periods. During the remainder of 12 or more hours in constant conditions, rate of change in O2 was minimal. Apparently internal supplies of nutrients and photosynthetates were quickly exhausted, and slow rates of diffusion across the colony border limited both photosynthesis and respiration."
- Type
- Journal Article
- Authors
- Arvidson, Bregieta; Baker, Alan
- Units
- ACAD
- Keywords
- Lakes and ponds, Oxygen (O)