These beautiful Australasian Shoveler ducks (Spatula rhynchotis) are at risk of becoming ill or even dying because their lake has been overwhelmed with a heavy bloom of the toxic blue-green alga (or cyanobacterium), Microcystis aeruginosa. Many types of cyanobacteria are toxic, and grow out of control when waterways are over-enriched with nutrients (eutrophic), particularly phosphorus and to a lesser extent nitrogen. Contaminated stormwater carries much of the nutrient pollution that enters the lake – some of the nutrients are dissolved in the water, but much of it is bound in leaf litter.
CitationBob Humphries and Sally Robinson, IBC1586303. Accessible at hbw.com/ibc/1586303.
Bob Humphries and Sally Robinson, IBC1586303. Video of Australian Shoveler Spatula rhynchotis at Como, Australia. Accessible at hbw.com/ibc/1586303.
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