Parasitic fungi keep harmful blue-green algae in check

When a lake is covered with green scums during a warm summer, cyanobacteria — often called blue-green algae — are usually involved. Mass development of cyanobacteria is bad for water quality. But cyanobacteria can become sick, when for instance infected by fungal parasites. Researchers found out that these infections do not only kill cyanobacteria, they also make them easier to consume for their natural predators. Fungal parasites thus help to slow down the growth of blue-green algae.