Recruitment of damselfishes in One Tree Island lagoon: persistent interannual spatial patterns
Recruitment of damselfishes in One Tree Island lagoon: persistent interannual spatial patterns
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DOI：
10.3354/meps202219
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发表时间：
2000-01-01
影响因子：
2.5
通讯作者：
Beretta, GA
中科院分区：
文献类型：
--
作者：
Booth, DJ;Kingsford, MJ;Beretta, GA
对大堡礁南部一树岛泻湖内23种雀鲷（Pomacentridae）新定居者的时空分布格局进行了3个夏季的测定，以评估其空间分布格局的持续性。1993/1994年的征聘总数比1994/1995年高出3倍，比1999年高出1.5倍。在一般情况下，招聘减少对泻湖中心，即使栖息地的可用性并不低，平均而言，这表明大多数鱼类定居在外部网站，因为它们是平流从邻近的沃茨。此外，各外围地点的新兵人数也有很大差异。连续的珊瑚礁和补丁珊瑚礁栖息地的招聘模式也不同的物种，这表明在这个广泛的水平上的栖息地选择。例如，Pomacentrus nagasakiensis主要发现于斑块礁，而P. moluccensis主要发现于连续礁。在研究期间，一个地点（鲨鱼巷）接收了大多数物种的最高数量的新兵，自1975年以来的研究中一直观察到这种模式。尽管年际变化丰富的潜在定居者和差异，在某些物种的栖息地偏好，因此，珊瑚礁上的一些网站可以接收相对较高的定居者在十年的时间尺度。这种空间格局的一致性可能是由于鲨鱼巷的当地地形和海洋学，这似乎有利于潜在定居者的输入。活珊瑚的可获得性也可能是重要的，但是在这个地点，没有显示出对活覆盖物的偏好的物种也被大量招募。将鲨鱼巷的属性与其他地点的属性进行比较。总体而言，网站的基础上聚集的海洋和栖息地的功能也有类似的招聘，这表明这些功能可能是有用的，在预测其他地方的珊瑚礁招聘热点。
The spatial and temporal patterns of distribution of new settlers of 23 species of damselfish (Pomacentridae) within One Tree Island lagoon, southern Great Barrier Reef (GBR) were measured for 3 summers to assess the persistence of spatial patterns of recruitment. Overall recruitment was 3 times higher in 1993/1994 than 1994/1995, and 1.5 times higher than 1999. In general, recruitment decreased towards the lagoon centre, even though habitat availability was not lower there on average, suggesting that most fish settled at outer sites as they were advected from adjacent waters. There was also great variation in numbers of recruits among outer sites. Patterns of recruitment to continuous reef and patch reef habitats also differed among species, suggesting habitat selection at this broad level. For example, Pomacentrus nagasakiensis was primarily found on patch reefs, while P. moluccensis was largely found on continuous reef. One site (Shark Alley) received the highest number of recruits of most species during the study, and this pattern has been observed in studies since 1975. Despite interannual variability in abundance of potential settlers and differences in the habitat preferences of some species, therefore, some sites on the reef can receive relatively high numbers of settlers over decadal time scales. This consistency of spatial pattern may be due to local topography and oceanography at Shark Alley, which appear to favour the input of potential settlers. The availability of live coral may also be important, but species which showed no preferences for live cover also recruited at high levels at this site. The attributes of Shark Alley were compared with those at other sites. Overall, sites that clustered on the basis of oceanographic and habitat features also had similar recruitment, suggesting that these features may be useful in predicting recruitment hotspots on reefs elsewhere.