Climate change could wipe out a third of parasite species, study finds

Parasites such as lice and fleas are crucial to ecosystems, scientists say, and extinctions could lead to unpredictable invasions

Climate change could wipe out a third of all parasite species on Earth, according to the most comprehensive analysis to date.

Tapeworms, roundworms, ticks, lice and fleas are feared for the diseases they cause or carry, but scientists warn that they also play a vital role in ecosystems. Major extinctions among parasites could lead to unpredictable invasions of surviving parasites into new areas, affecting wildlife and humans and making a “significant contribution” to the sixth mass extinction already under way on Earth.

Related: Earth's sixth mass extinction event under way, scientists warn