Ecologists say the warming is "part of a long-term shift that requires our attention and action".
The Environment Agency says the algae, also found in a flood channel, is toxic to people and pets.
The Environment Agency said the algae is toxic to people and pets.
Campaigners gathered at several locations around Lough Neagh to come together to 'Sing for the Lough'.
The QUB team says it is the first time several techniques have been combined to analyse the effect.
The algae was spotted on the south-west shore off the Washingbay Lough Walk.
The students are showcasing their science project at the Stripe Young Scientist and Technology Exhibition in Dublin.
BBC NI's Agriculture and Environment correspondent Louise Cullen gives her round-up of 2025.
One bathing water in NI has been classed as "poor", with 24 achieving "excellent" status.
