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Importance of macroalgal fields as coral reef fish nursery habitat in north-west Australia

机译：大型藻类场作为澳大利亚西北部珊瑚礁鱼苗圃栖息地的重要性

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Macroalgal fields are a feature of the shallow tropical benthos, yet their importance for coral reef fish population dynamics remains poorly understood. The abundance of fish recruits was recorded using underwater visual census at six macroalgal and 11 coral reef sites in the Mon-tebello and Barrow Islands. Surveys identified 6,935 individual recruit fish from 105 species, 54 genera and 20 families. Of these, 1,401 recruits from 48 species, 31 genera and 14 families were observed in macroalgal sites. Sixteen of the 105 recruit species (15.2 %) were observed exclusively at macroalgal sites. Forty-two (87.5 %) of these species have been observed as adults on adjacent coral reefs. Species composition of fish recruits differed significantly between the two habitats. Corallivore, small omnivore and zooplanktivore recruits had significantly higher numbers in the coral sites, while the results clearly demonstrate that juveniles, within the genera Lethrinus and Choerodon, as well as large algal croppers, are predominantly found at macroalgal (74-100 %) rather than coral-dominated sites. High-canopy macroalgae cover was positively correlated with abundance of these taxa, particularly Lethrinids (r~2 = 0.40). This study is the first to highlight the important attributes of tropical macroalgal fields and suggests that they have a similar role to seagrass meadows as essential juvenile habitat, thus warranting greater attention in conservation planning and ecological studies.
机译：大型藻类场是热带浅海底栖生物的特征，但对于珊瑚礁鱼类种群动态的重要性仍然知之甚少。使用水下视觉普查在蒙泰贝罗和巴罗群岛的六个大藻类和11个珊瑚礁地点记录了新兵的数量。调查确定了来自105个物种，54个属和20个科的6,935只个体募集的鱼类。其中，在大型藻类地点观察到来自48个物种，31个属和14个科的1,401名新兵。仅在大型藻类地点观察到了105种新物种中的16种（占15.2％）。在相邻的珊瑚礁上已经观察到其中的四十二（87.5％）个成年。在这两个栖息地之间，新兵的鱼类组成存在显着差异。角鲨，小型杂食动物和浮游动物在珊瑚地段的数量显着较高，而结果清楚地表明，在Lethrinus和Choerodon属中的幼鱼以及大型藻类作物主要在大型藻类中发现（74-100％），而不是比珊瑚为主的地方高冠层大型藻类的盖度与这些类群的丰富度呈正相关，尤其是拟除虫菊类（r〜2 = 0.40）。这项研究是第一个强调热带大型藻类场的重要属性的研究，并表明它们与海草草甸作为重要的少年栖息地具有相似的作用，因此值得在保护规划和生态研究中给予更大的关注。

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  • 来源
    《Marine biology》 |2014年第3期|599-607|共9页
  • 作者

    R. D. Evans; S. K. Wilson; S. N. Field; J. A. Y. Moore;

  • 作者单位

    Department of Parks and Wildlife, 17 Dick Perry Avenue, Kensington, WA 6151, Australia ,School of Plant Biology, Oceans Institute, University of Western Australia, Crawley, WA 6009, Australia;

    Department of Parks and Wildlife, 17 Dick Perry Avenue, Kensington, WA 6151, Australia ,School of Plant Biology, Oceans Institute, University of Western Australia, Crawley, WA 6009, Australia;

    Department of Parks and Wildlife, 17 Dick Perry Avenue, Kensington, WA 6151, Australia ,School of Plant Biology, Oceans Institute, University of Western Australia, Crawley, WA 6009, Australia;

    Department of Parks and Wildlife, 17 Dick Perry Avenue, Kensington, WA 6151, Australia ,Research Institute for the Environment and Livelihoods, Charles Darwin University, Darwin, NT 0909, Australia ,North Australia Marine Research Alliance, Arafura Timor Research Facility, Brinkin, NT 0810, Australia;

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