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首页> 外文期刊>Estuarine Coastal and Shelf Science >Turf algal epiphytes metabolically induce local pH increase, with implications for underlying coralline algae under ocean acidification
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Turf algal epiphytes metabolically induce local pH increase, with implications for underlying coralline algae under ocean acidification

机译：草坪藻附生植物代谢性地引起局部pH值升高，对海洋酸化下的潜在珊瑚藻有影响

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摘要

The presence of epiphytic turf algae may modify the effects of ocean acidification on coralline algal calcification rates by altering seawater chemistry within the diffusive boundary layer (DBL) above coralline algal crusts. We used microelectrodes to measure the effects of turf algal epiphytes on seawater pH and the partial pressure of oxygen (pO(2)) within the DBL at the surface of Hydrolithoideae coralline algal crusts under ambient (36 Pa) CO2 and an ocean acidification scenario with elevated CO2 (200 Pa). Turf algae significantly increased the mean diel amplitude of pH and pO2, and this effect was more pronounced under elevated CO2. We suggest that increases in seawater CO2 under ocean acidification conditions may drive an increase in the abundance of epiphytic turf algae, consequently modifying the chemistry within the DBL. Thus, the effect of epiphytic turf algae on microscale pH is striking and will likely affect coralline algal response to ocean acidification, highlighting the importance of understanding the effects of environmental change on species interactions. (C) 2015 Elsevier Ltd. All rights reserved.
机译：附生草皮藻的存在可以通过改变珊瑚藻壳上方的扩散边界层（DBL）内的海水化学来改变海洋酸化对珊瑚藻钙化率的影响。我们使用微电极来测量草皮藻附生植物对环境pH值（36 Pa）的CO2和海洋酸化情景下的水lith石珊瑚线藻壳表面DBL中海水pH和氧气分压（pO（2））的影响。二氧化碳（200 Pa）升高。草坪藻类显着增加了pH和pO2的平均diel幅度，这种影响在二氧化碳浓度升高的情况下更为明显。我们建议，在海洋酸化条件下海水中CO2的增加可能会导致附生草皮藻类的丰度增加，从而改变DBL内的化学性质。因此，附生草皮藻类对微尺度pH的影响是惊人的，并且很可能会影响珊瑚藻对海洋酸化的反应，这突出了理解环境变化对物种相互作用的影响的重要性。 （C）2015 Elsevier Ltd.保留所有权利。

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  • 来源
    《Estuarine Coastal and Shelf Science》 |2015年第5期|463-470|共8页
  • 作者

    Short J. A.; Pedersen O.; Kendrick G. A.;

  • 作者单位

    Univ Western Australia, UWA Oceans Inst, Crawley, WA 6009, Australia|Univ Western Australia, ARC Ctr Excellence Coral Reef Studies, Crawley, WA 6009, Australia|Univ Western Australia, Sch Earth & Environm, Crawley, WA 6009, Australia;

    Univ Copenhagen, Freshwater Biol Lab, Dept Biol, DK-2100 Copenhagen, Denmark|Univ Western Australia, UWA Inst Adv Studies, Crawley, WA 6009, Australia|Univ Western Australia, Sch Plant Biol, Crawley, WA 6009, Australia;

    Univ Western Australia, UWA Oceans Inst, Crawley, WA 6009, Australia|Univ Western Australia, Sch Plant Biol, Crawley, WA 6009, Australia;

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  • 正文语种 eng
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  • 关键词

    Calcification; Photosynthesis; Coralline algae; Acidification; pH; Diffusive boundary layer;

    机译：钙化;光合作用;珊瑚藻;酸化;pH;扩散边界层;

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