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Plankton supports the majority of fish biomass on temperate rocky reefs

机译：浮游生物支持温带礁石上的大部分鱼类生物量

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Coastal temperate rocky reefs are economically valuable and highly diverse, yet the trophodynamics of these productive systems are understudied. Quantifying the trophic linkages that support fish assemblages on these reefs is valuable for understanding how these assemblages may change due to changes in benthic and pelagic primary production. The goal of this study was to quantify the relative importance of primary sources of nutrition (here, macroalgae, phytoplankton, zooplankton, and detritus) for supporting fish assemblages on shallow rocky reefs. We constructed a general food web that traces the food sources supporting fish biomass on shallow temperate reefs near Sydney, Australia, using species composition data from 17 reefs based on field sampling and the Reef Life Survey (reeflifesurvey.com), and combined this with dietary information sourced from field collections and published literature. Planktivorous fish typically dominated reef fish assemblages, comprising an average of 41% of the total fish biomass (ranging from 12 to 71% among sites). Our food web analysis showed that, on average, 56% (+/- 5% s.e.) of the total fish biomass was ultimately supported by phytoplankton (and 53% from zooplankton), in comparison to 31% (+/- 4%) supported by macroalgae and 12% (+/- 2%) by detritus. This result highlights the dominance of zooplanktivorous fish on temperate reefs and also their importance as prey for piscivores. Our findings demonstrate the importance of understanding the coastal dynamics of plankton and planktivory for predicting the response of temperate reefs and their fish assemblages to a changing climate.
机译：沿海温带礁石具有经济价值，而且种类繁多，但尚未充分研究这些生产系统的营养动力学。量化支持这些礁石上鱼类组合的营养联系对于了解这些组合可能由于底栖和中上层初级生产的变化而如何变化是有价值的。这项研究的目的是量化主要营养来源（在这里是大型藻类，浮游植物，浮游动物和碎屑）对支撑浅礁石鱼群的相对重要性。我们使用现场采样和礁石生命调查（reeflifesurvey.com），使用来自17个礁石的物种组成数据，在澳大利亚悉尼附近的浅温带礁石上建立了支持鱼类生物量的食物来源的通用食物网，并将其与饮食相结合信息来自田野收藏和已出版的文献。浮游鱼类通常在礁鱼组合中占主导地位，平均占鱼类总生物量的41％（地点之间从12％到71％不等）。我们的食物网分析表明，平均而言，鱼类总生物量中的56％（se）最终由浮游植物支持（而浮游动物为53％），而31％（+/- 4％）由大型藻类支持，碎屑占12％（+/- 2％）。这一结果凸显了浮游鱼类在温带珊瑚礁上的优势地位，以及它们作为食肉动物猎物的重要性。我们的发现表明，了解浮游生物和浮游生物的沿海动态对于预测温带珊瑚礁及其鱼类组合对气候变化的反应的重要性。

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  • 来源
    《Marine biology》 |2017年第4期|73.1-73.12|共12页
  • 作者

    Lisa Truong; Suthers Iain M.; Cruz Derrick O.; Smith James A.;

  • 作者单位

    Univ New South Wales, Evolut & Ecol Res Ctr, Sydney, NSW 2052, Australia|Univ New South Wales, Sch Biol Earth & Environm Sci, Sydney, NSW 2052, Australia|Sydney Inst Marine Sci, Chowder Bay Rd, Mosman, NSW 2088, Australia;

    Univ New South Wales, Evolut & Ecol Res Ctr, Sydney, NSW 2052, Australia|Univ New South Wales, Sch Biol Earth & Environm Sci, Sydney, NSW 2052, Australia|Sydney Inst Marine Sci, Chowder Bay Rd, Mosman, NSW 2088, Australia;

    Univ New South Wales, Evolut & Ecol Res Ctr, Sydney, NSW 2052, Australia|Univ New South Wales, Sch Biol Earth & Environm Sci, Sydney, NSW 2052, Australia|Sydney Inst Marine Sci, Chowder Bay Rd, Mosman, NSW 2088, Australia;

    Univ New South Wales, Evolut & Ecol Res Ctr, Sydney, NSW 2052, Australia|Univ New South Wales, Sch Biol Earth & Environm Sci, Sydney, NSW 2052, Australia|Sydney Inst Marine Sci, Chowder Bay Rd, Mosman, NSW 2088, Australia;

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