Depth zonation and bathymetric trends of deep-sea megafaunal scavengers of the Hawaiian Islands
Depth zonation and bathymetric trends of deep-sea megafaunal scavengers of the Hawaiian Islands
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DOI：
10.1016/j.dsr.2008.08.005
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发表时间：
2009-02-01
影响因子：
2.4
通讯作者：
Drazen, Jeffrey C.
中科院分区：
文献类型：
--
作者：
Yeh, John;Drazen, Jeffrey C.
深海在物种组成和丰度方面显示出很强的深度地带性。对这些模式的研究可以提供生态学上的见解，了解生物如何适应和应对与深度同时发生的不断变化的环境参数。在这里，我们提供了第一个热带研究水深地带性和其他深度相关的趋势（大小，丰度和物种丰富度）跨越货架深海深处的大型动物清除。诱饵延时自由车辆相机被用来研究深海底栖和底栖清除社区的夏威夷群岛，该地区的生物学和生态学仍然研究不足，低于2000米。22个部署深度从250到4783米，产生了37个类群吸引诱饵，包括第一次出现在夏威夷群岛的Zoaradeniae家庭。物种峰值丰度（n（max））的Bray-Curtis相似性聚类分析揭示了4个主要动物区带（250- 500、1000、1500 -3000和4000 m），指定深度组之间存在显著分离（ANOSIM，全球R = 0.907，p = 0.001）。在500-1000米的过渡期，物种周转率最大，与当地氧气最低区的位置相吻合，确定了一个主要的动物群中断。物种组合的优势从十足类甲壳动物转移到硬骨鱼从浅到深动物区带。显着的大小差异，总长度与深度被发现的四种鱼类检查。随着深度的增加，清道夫相对丰度呈对数下降。清除物种之间的相互作用的证据之间也指出Synaphobranchus affinis和Neolithodes属。（竞争）和Histiobranchus属和虾（捕食），这表明，清道夫之间的相互作用可能会影响指数的丰度产生的诱饵相机数据。(C)2008爱思唯尔有限公司保留所有权利。
The deep sea has been shown to exhibit strong depth zonation in species composition and abundance. Examination of these patterns can offer ecological insight into how organisms adapt and respond to changing environmental parameters that co-occur with depth. Here we provide the first tropical study on bathymetric zonation and other depth-related trends (size, abundance, and species richness) spanning shelf to abyssal depths of scavenging megafauna. Baited time-lapse free-vehicle cameras were used to examine the deep-sea benthic and demersal scavenging communities of the Hawaiian Islands, an area for which the biology and ecology have remained poorly studied below 2000 m. Twenty-two deployments ranging in depth from 250 to 4783 m yielded 37 taxa attracted to bait, including the first known occurrence of the family Zoarcidae in the Hawaiian Islands. Cluster analysis of Bray-Curtis similarity of species peak abundance (n(max)) revealed four main faunal zones (250-500,1000,1500-3000, and 4000 m) with significant separation (ANOSIM, global R = 0.907, p = 0.001) between designated depth groups. A major faunal break was identified at the 500-1000 m transition where species turnover was greatest, coinciding with the location of the local oxygen minimum zone. Dominance in species assemblage shifted from decapod crustaceans to teleosts moving from shallow to deeper faunal zones. Significant size differences in total length with depth were found for two of the four fish species examined. A logarithmic decline was observed in scavenger relative abundance with depth. Evidence of interaction between scavenging species was also noted between Synaphobranchus affinis and Neolithodes sp. (competition) and Histiobranchus sp. and aristeid shrimp (predation), suggesting that interactions between scavengers could influence indices of abundance generated from baited camera data. (C) 2008 Elsevier Ltd. All rights reserved.