Predicting structural complexity of reefs and fish abundance using acoustic remote sensing (RoxAnn)
Predicting structural complexity of reefs and fish abundance using acoustic remote sensing (RoxAnn)
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DOI：
10.1007/s00227-010-1575-5
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发表时间：
2011-03-01
期刊：
影响因子：
2.4
通讯作者：
Sotheran, Ian
中科院分区：
文献类型：
--
作者：
Bejarano, Sonia;Mumby, Peter J.;Sotheran, Ian
这项研究确定了加勒比海珊瑚礁栖息地的声学粗糙度是否是其地形复杂性的准确代理，并显着预测其鱼类丰度。鱼类丰度测量在25个地点沿着前礁的格洛弗环礁（伯利兹）。在每个站点，原位粗糙度（ISR）估计使用“链和磁带”的方法，声学粗糙度（E1）使用RoxAnn获得。分析了E1与ISR、E1与ISR与17种常见种丰度和10种稀有种丰度的关系。E1是一个显着的预测的地形复杂性（r（2）= 0.66），丰富的10种常见的外科鱼类，pomacentrids，scrids，咕噜和serranids和存在的4种罕见的pomacentrids和笛鲷。E1的微小差异（即匕首0.05 - 0.07）反映了不同地点之间鱼类丰度的细微但显著的差异（类似于1个个体200 m（-2）和116 g 200 m（-2））。虽然我们需要使用IKONOS数据来获得每个站点的大量回波，但未来的研究将能够单独利用RoxAnn数据来检测基质复杂性和鱼类丰度的空间模式，前提是每个站点收集至少50个RoxAnn回波。
This study determined whether the acoustic roughness of Caribbean reef habitats is an accurate proxy for their topographic complexity and a significant predictor of their fish abundance. Fish abundance was measured in 25 sites along the forereef of Glovers Atoll (Belize). At each site, in situ rugosity (ISR) was estimated using the "chain and tape" method, and acoustic roughness (E1) was acquired using RoxAnn. The relationships between E1 and ISR, and between both E1 and ISR and the abundance of 17 common species and the presence of 10 uncommon species were tested. E1 was a significant predictor of the topographic complexity (r (2) = 0.66), the abundance of 10 common species of surgeonfishes, pomacentrids, scarids, grunts and serranids and the presence of 4 uncommon species of pomacentrids and snappers. Small differences in E1 (i.e. a dagger 0.05-0.07) reflected in subtle but significant differences in fish abundance (similar to 1 individual 200 m(-2) and 116 g 200 m(-2)) among sites. Although we required the use of IKONOS data to obtain a large number of echoes per site, future studies will be able to utilise RoxAnn data alone to detect spatial patterns in substrate complexity and fish abundance, provided that a minimum of 50 RoxAnn echoes are collected per site.