Local extinction of a coral reef fish explained by inflexible prey choice

被引:0
|
作者
R. M. Brooker
P. L. Munday
S. J. Brandl
G. P. Jones
机构
[1] James Cook University,School of Marine and Tropical Biology
[2] James Cook University,ARC Centre of Excellence for Coral Reef Studies
来源
Coral Reefs | 2014年 / 33卷
关键词
Coral reef fish; Coral bleaching; Corallivory; Disturbance; Local extinction;
D O I
暂无
中图分类号
学科分类号
摘要
While global extinctions of marine species are infrequent, local extinctions are becoming common. However, the role of habitat degradation and resource specialisation in explaining local extinction is unknown. On coral reefs, coral bleaching is an increasingly frequent cause of coral mortality that can result in dramatic changes to coral community composition. Coral-associated fishes are often specialised on a limited suite of coral species and are therefore sensitive to these changes. This study documents the local extinction of a corallivorous reef fish, Oxymonacanthus longirostris, following a mass bleaching event that altered the species composition of associated coral communities. Local extinction only occurred on reefs that also completely lost a key prey species, Acropora millepora, even though coral cover remained high. In an experimental test, fish continued to select bleached A. millepora over the healthy, but less-preferred prey species that resisted bleaching. These results suggest that behavioural inflexibility may limit the ability of specialists to cope with even subtle changes to resource availability.
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页码:891 / 896
页数:5
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