CARBONATE TRANSPORT AND WITHIN REEF PATTERNS OF BIOEROSION AND SEDIMENT RELEASE BY PARROTFISHES (FAMILY SCARIDAE) ON THE GREAT-BARRIER-REEF
CARBONATE TRANSPORT AND WITHIN REEF PATTERNS OF BIOEROSION AND SEDIMENT RELEASE BY PARROTFISHES (FAMILY SCARIDAE) ON THE GREAT-BARRIER-REEF
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DOI：
10.3354/meps117127
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发表时间：
1995-02-01
影响因子：
2.5
通讯作者：
BELLWOOD, DR
中科院分区：
文献类型：
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作者：
BELLWOOD, DR
研究了两种鹦嘴鱼Chlorurus gibbus和C.在澳大利亚大堡礁吕宋岛的2个地点检查了Scardidus（Scaridae科）。摄食行为和相关的外部生物侵蚀进行了研究，在3个空间尺度：珊瑚礁区，微生境和咬网站。这两个物种的摄食模式表现出很强的选择性，特定的珊瑚礁区，微生境和底层类型。这两个物种主要在浅水区觅食，对珊瑚树桩有强烈的偏好。C. gibbus强烈选择了这两个地点的礁脊和草皮藻类。C. Sordidus在2个位点上显示出不同的选择性。这表明，这些网站和物种的差异是与领土食草动物的相互作用的结果。In C.整个珊瑚礁的进食和排泄模式极其相似。没有材料的净流动。与之相反，C. gibbus表现出强烈的偏好在浅礁区觅食，排便的特点是从觅食区移到特定的排便地点，通常是在礁的较深区域。这导致了碳酸盐从珊瑚礁上的活跃净运动。
The patterns of erosion and defaecation by 2 species of parrotfish Chlorurus gibbus and C. sordidus (family Scaridae) were examined at 2 sites on Lizard Island, Great Barrier Reef, Australia. Feeding behaviour and associated external bioerosion were examined at 3 spatial scales: reef zone, microhabitat and bite site. Feeding patterns in both species showed strong selectivity for specific reef zones, microhabitats and substratum types. Both species fed predominantly in the shallows, with strong preferences for coral stumps. C. gibbus strongly selected the reef crest and turf algae at both sites. C. sordidus showed differential selectivity at the 2 sites. It is suggested that these site and species differences are a result of interactions with territorial herbivores. In C. sordidus the patterns of feeding and defaecation across the reef were extremely similar. There was no net movement of material. In contrast, C. gibbus showed a strong preference for feeding in shallow reef zones, with defaecation marked by movement away from feeding areas to specific defaecation sites, usually in deeper areas of the reef. This resulted in an active net movement of carbonate off the reef.