Manipulative pond scum

From the FishBio blog:

“Algal blooms in freshwater lakes are often considered a harmful side effect of human land-use practices that shed excess nutrients into waterways, through sources like farming runoff and pollution. However, a new study from a multi-institutional collaboration lead by Dartmouth College shows that these external nutrient sources are not always needed for algae to thrive. Cyanobacteria, also known as pond scum or blue-green algae, can actively create the environmental conditions that allow them to keep growing in clear freshwater lakes, despite a lack of nutrients, the paper highlights. This work, recently published in the journal Ecosphere, can help scientists understand the causes of algal blooms that may threaten precious freshwater resources. … ”

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