Photosynthetic oxygen bubble stream sounds from aquatic macrophytes, and their consequences for acoustic biodiversity inventories and acoustic communication in shallow freshwater settings

PLOS ONE | https://doi.org/10.1371/journal.pone.0317424 April 23, 2025 8 / 13 PLOS ONE Photosynthetic oxygen bubble stream sounds from aquatic macrophytes Fig 3. Exemplar 3 spectrogram and waveform. A macrophyte bubble stream sound recorded August 1, 2023, at Gull Lake, Alberta, Canada. See Fig 1 for axis descriptions. https://doi.org/10.1371/journal.pone.0317424.g005 Fig 4. Exemplar 4 spectrogram and waveform. A macrophyte bubble stream sound recorded August 1, 2021, at Gull Lake, Alberta, Canada. See Fig 1 for axis descriptions. https://doi.org/10.1371/journal.pone.0317424.g006