Photo gallery
Mat-forming cyanobacteria growing on the riverbed
Mat-forming cyanobacteria growing on the riverbed
Close-up of a mat in earlier stages of growth
Close-up of mats - note signs of peeling off the rocks
Close-up of algal mats - some mats are starting to peel
Thick dark blue-green algal mats - some mats are starting to peel
Detached algal mats stranded/exposed at water's edge
Extensive mats of cyanobacteria on riverbed - mats are starting to detach
Detached algal mat in the riverbank
Extensive mats of cyanobacteria on riverbed - mats are starting to detach
Detached floating algal mats trapped by a dam
Closer view of detached algal mats trapped by a dam
Closer view of a floating algal 'raft' (caught against a stick)