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Species on the move

It’s every snorkeler’s dream to see an array of colorful fish darting around coral reefs. But, schools of multicolored tropical fish have become unwelcome visitors in many places. In Gökova Bay in southwestern Turkey, invasive species such as the rabbitfish are wiping out native marine inhabitants with disastrous consequences for the local economy as our reporter Mabel Gundlach discovered in her video report. Protection zones and patrols are meant to ease the problem. But, a warming planet means ever more species are on the move, disrupting delicately balanced ecosystems around the world. In some places, the mass movement of species has radically altered native fauna and flora as Ruby Russell writes in our background article. So, what will the ecosystems of the future look like?

Global Ideas explains

Why do oceans turn acidic? 

Next week on Global Ideas

Protecting St Lucia's sea turtles

The Caribbean island of St Lucia is home to sea turtles and other marine species that are rapidly vanishing. Poaching of turtle eggs remains a huge problem as does the dumping of waste in the ocean. Mass tourism and large cruise ships have destroyed coral reefs. An initiative by the German development aid organization, GIZ, is working with locals to patrol and protect turtle habitats. The group works closely with communities and the government to improve sewage infrastructure, raise awareness through workshops and seminars and develop measures to better protect the island’s threatened flora and fauna.