Near-future ocean acidification causes differences in microbial associations within diverse coral reef taxa.
Near-future ocean acidification causes differences in microbial associations within diverse coral reef taxa.
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不久的将来海洋酸化会导致不同珊瑚礁类群内微生物关联的差异。
DOI：
10.1111/1758-2229.12006
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发表时间：
2013
影响因子：
3.3
通讯作者：
S. Uthicke
中科院分区：
文献类型：
--
作者：
N. Webster;A. Negri;F. Flores;C. Humphrey;Rochelle M. Soo;E. Botté;N. Vogel;S. Uthicke
微生物与各种海洋生物形成共生伙伴关系，对宿主的健康和生存至关重要。尽管这些关系的重要性，共生微生物对海洋酸化（OA）的敏感性在很大程度上是未知的，这需要得到纠正，以充分预测海洋生态系统在不断变化的气候中的恢复力。我们采用了剖析的方法来探讨与珊瑚礁生物膜和代表的三个生态重要的钙化无脊椎动物门[珊瑚，有孔虫和甲壳珊瑚藻（CCA）] OA的微生物的敏感性。这项研究的实验设计包括四个pH值与当前IPCC预测的未来几个世纪（pHNIST 8.1，7.9，7.7，7.5）一致;这些pH值/pCO 2的条件下产生的流通水族箱使用CO CO2鼓泡。所有降低pH值/增加pCO的处理引起了明显的差异，在微生物群落与珊瑚，有孔虫，CCA和珊瑚礁生物膜超过6周，而没有明显的迹象，主机压力检测在此期间。珊瑚、有孔虫、CCA和生物膜的微生物群落在pH 8.1（pCO_2 = 464 μatm）和pH 7.9（pCO_2 = 822 μatm）之间有显著差异，到本世纪末可能超过这个浓度。这种趋势在较低的pH/较高的pCO_2下持续。16 S rRNA基因测序揭示了微生物群落的可变和物种特异性变化，没有微生物类群始终存在或不存在于特定的pH值处理。珊瑚、有孔虫、CCA和生物膜微生物对预计到2100年发生的OA条件的高度敏感性是珊瑚礁生态系统的一个关切，并强调需要进行紧急研究，以评估微生物变化对宿主健康和珊瑚礁过程的影响。
Microorganisms form symbiotic partnerships with a diverse range of marine organisms and can be critical to the health and survival of their hosts. Despite the importance of these relationships, the sensitivity of symbiotic microbes to ocean acidification (OA) is largely unknown and this needs to be redressed to adequately predict marine ecosystem resilience in a changing climate. We adopted a profiling approach to explore the sensitivity of microbes associated with coral reef biofilms and representatives of three ecologically important calcifying invertebrate phyla [corals, foraminifera and crustose coralline algae (CCA)] to OA. The experimental design for this study comprised four pHs consistent with current IPCC predictions for the next few centuries (pHNIST 8.1, 7.9, 7.7, 7.5); these pH/pCO₂ conditions were produced in flow-through aquaria using CO₂ bubbling. All reduced pH/increased pCO₂ treatments caused clear differences in the microbial communities associated with coral, foraminifera, CCA and reef biofilms over 6 weeks, while no visible signs of host stress were detected over this period. The microbial communities of coral, foraminifera, CCA and biofilms were significantly different between pH 8.1 (pCO₂ = 464 μatm) and pH 7.9 (pCO₂ = 822 μatm), a concentration likely to be exceeded by the end of the present century. This trend continued at lower pHs/higher pCO₂. 16S rRNA gene sequencing revealed variable and species-specific changes in the microbial communities with no microbial taxa consistently present or absent from specific pH treatments. The high sensitivity of coral, foraminifera, CCA and biofilm microbes to OA conditions projected to occur by 2100 is a concern for reef ecosystems and highlights the need for urgent research to assess the implications of microbial shifts for host health and coral reef processes.
DOI：
10.1073/pnas.1007273107
发表时间：
2010-11-23
影响因子：
11.1
作者：
Albright, Rebecca;Mason, Benjamin;Langdon, Chris
通讯作者：
Langdon, Chris
影响因子：
8.8
作者：
Doropoulos, Christopher;Ward, Selina;Mumby, Peter J.
通讯作者：
Mumby, Peter J.