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Status of Caribbean coral reefs after bleaching and hurricanes in 2005

Status of Caribbean coral reefs after bleaching and hurricanes in 2005

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8. Stat u s o f Co r a l Reefs o f t h e Lesser Antilles<strong>after</strong> t h e <strong>2005</strong> Co r a l Bl e a c h i n g Ev e n tCl au d e Bo u c h o n, Pe d ro Po rt i l l o, Yo l a n d e Bo u c h o n-Nava r o ,Lo u i s Ma x, Pau l Hoetjes, An g e l i q u e Br at h wa i t e, Ra m o n Roac h ,Ha z e l Ox e n f o r d, Sh ay O’Fa r r e l l a n d Ow e n DaySu m m a r yzx Dur<strong>in</strong>g summer <strong>2005</strong>, a persistent ‘HotSpot’ surrounded these isl<strong>and</strong>s;zx Coral <strong>bleach<strong>in</strong>g</strong> <strong>and</strong> mortality was probably the most severe ever recorded <strong>in</strong> theLesser Antilles <strong>and</strong> was the most extreme for the wider <strong>Caribbean</strong> dur<strong>in</strong>g <strong>2005</strong>;zx The most severe <strong>bleach<strong>in</strong>g</strong> event ever recorded at Barbados occurred dur<strong>in</strong>gSeptember <strong>and</strong> October <strong>2005</strong>, <strong>and</strong> affected all <strong>coral</strong> species at all depths, <strong>and</strong> all reeftypes <strong>and</strong> habitats;zx There was between 25% <strong>and</strong> 52% mortality <strong>of</strong> <strong>coral</strong>s <strong>in</strong> the French West Indies,especially at Guadeloupe <strong>and</strong> Mart<strong>in</strong>ique. Bleach<strong>in</strong>g affected most <strong>coral</strong> species <strong>and</strong>resulted <strong>in</strong> reduced larval recruitment <strong>in</strong> the follow<strong>in</strong>g 2 seasons. However, thereappears to be no effects on fish populations;zx There was extensive <strong>bleach<strong>in</strong>g</strong> (80%) on the northern Netherl<strong>and</strong>s Antilles isl<strong>and</strong>s <strong>of</strong>St. Maarten, Saba, <strong>and</strong> St. Eustatius <strong>in</strong> August <strong>2005</strong>; but only m<strong>in</strong>or <strong>bleach<strong>in</strong>g</strong> <strong>and</strong>m<strong>in</strong>imal mortality on the southern isl<strong>and</strong>s <strong>of</strong> Bonaire <strong>and</strong> Curaçao;zx On the isl<strong>and</strong> <strong>of</strong> Tobago, most species bleached, with 66% average cover <strong>of</strong> bleached<strong>coral</strong>. Bleach<strong>in</strong>g <strong>in</strong> Montastraea annularis was highly variable; there was 73%<strong>bleach<strong>in</strong>g</strong> <strong>in</strong> one st<strong>and</strong>, but only 6% <strong>in</strong> another, on Buccoo Reef;zx No <strong>hurricanes</strong> passed through this region <strong>in</strong> <strong>2005</strong>; this partially expla<strong>in</strong>s the severity<strong>of</strong> <strong>bleach<strong>in</strong>g</strong> as there were no strong w<strong>in</strong>ds to lower seawater temperatures;zx These isl<strong>and</strong>s are highly dependent on their <strong>coral</strong> <strong>reefs</strong>, thus there is an urgent needfor appropriate management responses as sea temperatures are predicted to risefurther <strong>in</strong> future.85

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