Isolated Reefs in Greater Peril

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Although Australia’s massive Great Barrier Reef is home to a dazzling array of marine life, its smaller and more remote regions are less crowded and less diverse.

A new study from the Australian Institute of Marine Science (AIMS) and Australia’s University of Adelaide reveals this kind of small-town living is dangerous for the local fish populations.

Professor Corey Bradshaw, director of Ecological Modeling at the University of Adelaide, said the first problem is that far-flung reefs, like many along the 1,600-mile (2,600-kilometer) stretch of the Great Barrier Reef, are less likely to receive visitors. In the fish world, immigration is key.

“We even have a name for it