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Introduction to cyanobacteria
Published in Ingrid Chorus, Martin Welker, Toxic Cyanobacteria in Water, 2021
Leticia Vidal, Andreas Ballot, Sandra M. F. O. Azevedo, Judit Padisák, Martin Welker
The classification of taxa proposed by Komárek et al. (2014) is largely based on whole-genome sequences and on ultrastructural characteristics, such as the distribution of thylakoids in the cells. These characteristics are not observable with light microscopy and hence not helpful for the routine analysis of field samples. Further, in this system, classical and morphological characteristics easily observed by microscopy, such as formation of filaments or the presence of sheaths, are less important. For example, the filamentous genus Pseudanabaena is grouped together with the unicellular Synechococcus in a new order Synechococcales.
Quantifying the role of organic phosphorus mineralisation on phytoplankton communities in a warm-monomictic lake
Published in Inland Waters, 2019
Matthew J. Prentice, David P. Hamilton, Anusuya Willis, Katherine R. O'Brien, Michele A. Burford
Collectively, the cyanobacterial assemblage in the surface waters of all sites (1–4) comprised 40 taxa representing 4 orders: synechococcales (18 taxa), chroococcales (10), nostocales (9), and oscillatoriales (3). Abundance and biovolume increased from October through December before decreasing in January (Fig. 2d, Site 4 shown; Fig. 4a–b). Nostacales and synechococcales were overwhelmingly dominant (Fig. 5a–b). The N-fixing nostocales comprised a mean biovolume of 1.60 mm3 L−1 (60% share; Fig. 5b) and represented 5 of the 10 most dominant cyanobacteria by biovolume, including the toxic R. raciborskii (Table 2), and typically increased in biovolume from October through December before decreasing in January. Synechococcales comprised a mean biovolume of 0.84 mm3 L−1 (34%; Fig. 5b), representing 4 of the 10 most dominant cyanobacteria by biovolume (Table 2), and increased in biovolume from October through December before decreasing in January.