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首页> 外文期刊>Polar biology >The adaptive significance of chromatophores in the Arctic under-ice amphipod Apherusa glacialis
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The adaptive significance of chromatophores in the Arctic under-ice amphipod Apherusa glacialis

机译：北极冰下两栖动物Apherusa glacialis的色谱适应性意义

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摘要

Solar radiation is a crucial factor governing biological processes in polar habitats. Containing harmful ultraviolet radiation (UVR), it can pose a threat for organisms inhabiting surface waters of polar oceans. The present study investigated the physiological color change in the obligate sympagic amphipod Apherusa glacialis mediated by red-brown chromatophores, which cover the body and internal organs of the species. Short-term experimental exposure to photosynthetic active radiation (PAR) led to pigment dispersal in the chromatophores, resulting in darkening of the animal. Irradiation in the PAR range (400-700 nm) was identified as the main trigger with high light intensities evoking marked responses within 15 min. After exposure to high PAR, darkness led to a slow aggregation of pigments in the cell center after 24 h. Experiments revealed no statistically significant change in coloration of the animal when exposed to different background colors nor UV radiation. Our results point to a dose-and time-dependent photoprotective role of chromatophores in the amphipod, presuming a shielding effect from harmful radiation in a dispersed state. The reversible nature of the physiological color change enables the species to adapt dynamically to prevailing light conditions and thereby minimize the cost of increased conspicuousness toward visually hunting predators.
机译：太阳辐射是控制极地栖息地生物过程的关键因素。它含有有害的紫外线辐射（UVR），可能对居住在极地海洋表层水域的生物构成威胁。本研究调查了由红棕色色谱介导的专性共生两足动物Apherusa glacialis的生理颜色变化，该色谱覆盖了该物种的身体和内部器官。短期实验暴露于光合作用活性辐射（PAR）会导致色素分散在色谱中，从而导致动物变黑。 PAR范围（400-700 nm）的辐射被确定为高光强度的主要触发，在15分钟内引起明显的响应。暴露于高PAR后，黑暗导致24小时后细胞中心色素缓慢聚集。实验表明，当暴露于不同的背景色或紫外线辐射下，动物的色素没有统计学上的显着变化。我们的研究结果表明两栖动物体内的色谱具有剂量和时间依赖性的光防护作用，假定它们对分散状态的有害辐射具有屏蔽作用。生理颜色变化的可逆性质使该物种能够动态适应主要的光照条件，从而最大程度地降低了在视觉上捕食食肉动物的显眼性的成本。

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  • 来源
    《Polar biology》 |2011年第6期|p.823-832|共10页
  • 作者

    Mona M. Fuhrmann; Henrik Nygard; Rupert H. Krapp; JΦrgen Berge; Iris Werner;

  • 作者单位

    University Centre in Svalbard, 9171 Longyearbyen,Norway,Faculty of Biosciences, Fisheries and Economics,University of TromsΦ, 9037 TromsΦ, Norway;

    University Centre in Svalbard, 9171 Longyearbyen,Norway,Faculty of Biosciences, Fisheries and Economics,University of TromsΦ, 9037 TromsΦ, Norway;

    University Centre in Svalbard, 9171 Longyearbyen,Norway,Institute for Polar Ecology, University of Kiel,24148 Kiel, Germany;

    University Centre in Svalbard, 9171 Longyearbyen,Norway,Akvaplan-niva, 9296 TromsΦ, Norway;

    Institute for Polar Ecology, University of Kiel,24148 Kiel, Germany;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    photoprotection; ultraviolet radiation; color change; sympagic; apherusa glacialis; chromatophores; sea ice fauna; svalbard; arctic;

    机译：光保护;紫外线辐射;颜色变化;症状性的冰天牛色谱;海冰动物区系;斯瓦尔巴群岛北极;

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