Australian Institute of Marine Science

Cyclones can damage even distant reefs

Research finds current models underestimate the impact of hurricanes and typhoons on coral reef communities

Full paper and images available. Details below.

The same area of Scott Reef photographed in 2010, and again in 2012 after Cyclone Lua. Credit: James Gilmour/AIMS

Big and strong cyclones can harm coral reefs as far as 1000 kilometres away from their paths, new research shows.

A study led by Dr Marji Puotinen from the Australian Institute of Marine Science (AIMS) sounds a warning about the way strong cyclone winds build extreme seas that affect coral reefs in Australia and around the world.

Conventional modelling used to predict how a cyclone, hurricane or typhoon might impact corals assumes that wave damage occurs primarily within 100 kilometres of its track.

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Fish faeces reveals which species eat crown-of-thorns

Great Barrier Reef research finds the destructive starfish is eaten more often than thought.

Full paper, video, gifs and still images available. Details below.

Dr Frederieke Kroon looking at a crown-of-thorns starfish on the Great Barrier Reef. Credit: D.Westcott/CSIRO

Crown-of-thorns starfish are on the menu for many more fish species than previously suspected, an investigation using fish poo and gut goo reveals.

The finding suggests that some fish, including popular eating and aquarium species, might have a role to play in keeping the destructive pest population under control.

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Sharp increase in Ningaloo whale shark injuries might be due to boat encounters

Scarring and major lacerations due to vessel collisions becoming more common, study finds.

The tail of a whale shark (Rhincodon typus), showing massive scarring. Image: Jess Hadden.

Almost one-fifth of the whale sharks (Rhincodon typus) in Western Australia’s Ningaloo Reef Marine Park show major scarring or fin amputations, with the number of injured animals increasing in recent years, new research reveals.

Distinctive scar patterns strongly suggest many of the injuries are caused by boat collisions, says whale shark scientist Emily Lester from the Australian Institute of Marine Science (AIMS).

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Twice the coral trout in Great Barrier Reef protected zones

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Coral trout in protected ‘green zones’ are not only bigger and more abundant than those in fished ‘blue zones’ of the Great Barrier Reef Marine Park, but they are also better able to cope with cyclone damage, according to a long-term study published today in Current Biology.

Coral trout biomass has more than doubled since the 1980s in the green zones with most of the growth occurring since the 2004 rezoning. These and other changes identified by the study show that the green zones are contributing to the health of the Great Barrier Reef and that similar approaches may be beneficial for coral reefs around the world. [continue reading…]