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Moderate nutrient concentrations are not detrimental to corals under future ocean conditions

机译：中等营养浓度在未来的海洋状况下对珊瑚不利

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Under predicted future ocean conditions, reefs exposed to elevated nutrients will simultaneously experience ocean acidification and elevated temperature. We evaluated if moderate nutrients mitigate, minimize, or exacerbate negative effects of predicted future ocean conditions on coral physiology. For 30 days, Acropora millepora and Turbinaria reniformis were exposed to a fully factorial experiment of eight treatments including two seawater temperatures (26.4 degrees C and 29.8 degrees C), pCO(2) levels (401 mu atm pCO(2) and 760 mu atm pCO(2)), and nutrient concentrations (ambient: 0.40 mu mol L-1 NO3- and 0.22 mu mol L-1 PO43-, and moderate: 3.56 mu mol L-1 NO3- and 0.31 mu mol L-1 PO43-). Added nitrate was taken up by the algal endosymbionts and transferred to the coral hosts in both species, though to a much higher degree in A. millepora. When exposed to elevated temperature, elevated pCO(2,) or both, effects observed for chlorophyll a, calcification, biomass, and energy reserves were not compounded by the moderate nutrient concentrations in either species. Moderate nutrients enabled A. millepora to continue to meet daily metabolic demand via photosynthesis under predicted future ocean conditions and T. reniformis to greatly exceed daily metabolic demand via photosynthesis and heterotrophy. Our results suggest that balanced moderate nutrients are not detrimental to corals under predicted future ocean conditions and may even provide some benefits.
机译：根据预测的未来海洋状况，暴露于升高的营养素的珊瑚礁将同时体验海洋酸化和升高的温度。我们评估是否在预测未来海洋状况对珊瑚生理学的缓解，最小化或加剧负面影响的情况下进行评估。 30天，Acropora Millepora和Turbinaria Reniformis暴露于八种治疗的完全阶级实验，包括两个海水温度（26.4摄氏度和29.8摄氏度），PCO（2）水平（401亩ATM PCO（2）和760亩ATM PCO（2））和营养浓度（环境：0.40mu mol L-1 NO 3-和0.22μmolL-1 PO43-，中等：3.56μmolL-1 NO3-和0.31μmolL-1 PO43- ）。加入硝酸盐被藻类末端用藻酸溶，并转移到两种物种中的珊瑚宿主中，但在A. Millepora中的更高程度。当暴露于升高的温度时，升高的PCO（2，）或两者，对叶绿素A，钙化，生物质和能量储备观察到的效果未通过任一种中等营养浓度混合。使A. Millepora能够通过预测未来的海洋状况下的光合作用继续满足日常代谢需求，并通过光合作用和异营养学大大超过日常代谢需求的光合作用。我们的研究结果表明，平衡的中度营养素对预测未来海洋状况下的珊瑚并不有害，甚至可以提供一些好处。

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  • 来源
    《Marine biology》 |2021年第7期|98.1-98.15|共15页
  • 作者

    Dobson Kerri L.; Levas Stephen; Schoepf Verena; Warner Mark E.; Cai Wei-Jun; Hoadley Kenneth D.; Yuan Xiangchen; Matsui Yohei; Melman Todd F.; Grottoli Andrea G.;

  • 作者单位

    Ohio State Univ Sch Earth Sci Columbus OH 43210 USA;

    Ohio State Univ Sch Earth Sci Columbus OH 43210 USA|Univ Wisconsin Coll Letters & Sci Whitewater WI 53190 USA;

    Ohio State Univ Sch Earth Sci Columbus OH 43210 USA|Univ Amsterdam Inst Biodivers & Ecosyst Dynam Dept Freshwater & Marine Ecol Amsterdam Netherlands;

    Univ Delaware Sch Marine Sci & Policy Lewes DE 19958 USA;

    Univ Delaware Sch Marine Sci & Policy Lewes DE 19958 USA|Univ Georgia Dept Marine Sci Athens GA 30602 USA;

    Univ Delaware Sch Marine Sci & Policy Lewes DE 19958 USA|Univ Alabama Dept Biol Sci Tuscaloosa AL USA;

    Univ Georgia Dept Marine Sci Athens GA 30602 USA|Chinese Acad Sci South China Sea Inst Oceanol Key Lab Trop Marine Bioresources & Ecol Guangzhou Peoples R China;

    Ohio State Univ Sch Earth Sci Columbus OH 43210 USA|Japan Agcy Marine Earth Sci & Technol JAMSTEC Adv Sci Technol Res ASTER Program Yokosuka Kanagawa Japan;

    Reef Syst Coral Farm New Albany OH USA;

    Ohio State Univ Sch Earth Sci Columbus OH 43210 USA;

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