Safeguarding coastal coral communities on the central Great Barrier Reef (Australia) against climate change: realizable local and global actions
Safeguarding coastal coral communities on the central Great Barrier Reef (Australia) against climate change: realizable local and global actions
复制标题
保护大堡礁中部（澳大利亚）沿海珊瑚群落免受气候变化影响：可实现的地方和全球行动
DOI：
10.1007/s10584-011-0229-z
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发表时间：
2012
期刊：
影响因子：
4.8
通讯作者：
Roger N. Jones
中科院分区：
文献类型：
--
作者：
S. Wooldridge;T. Done;C. Thomas;I. Gordon;P. Marshall;Roger N. Jones
与人为（全球）气候变化相关的大规模珊瑚白化和珊瑚礁死亡的威胁众所周知。珊瑚礁当地条件（特别是珊瑚礁水质）在共同决定珊瑚对海水温度升高和 pH 值下降的生理耐受性方面所起的作用，却没有得到充分考虑。在这里，减少陆地径流中溶解无机氮（DIN）的暴露，提高了大堡礁（澳大利亚）中部沿海珊瑚群落的热耐受性，所模拟的效益与未来变暖的替代情景一起被考虑。模拟强调，DIN 减少 80% 会“购买”额外约 50-60 年的珊瑚礁建设能力，以实现无缓解（“一切照旧”）的白化预测。此外，综合管理带来的好处是：(i) 河流负荷中的 DIN 局部减少约 50%，以及 (ii) 全球将大气中的二氧化碳稳定在 450 ppm 以下，有助于确保硬珊瑚为主的珊瑚礁景观在 2100 年之后持续存在。这些模拟强化了这样的信息：除了全球必须减少未来大气二氧化碳排放之外，仍然需要采取有效的当地管理行动，以增强珊瑚礁群落对气候变化影响的抵抗力和恢复力。
The threats of wide-scale coral bleaching and reef demise associated with anthropogenic (global) climate change are widely known. Less well considered is the contributing role of conditions local to the reef, in particular reef water quality, in co-determining the physiological tolerance of corals to increasing sea temperatures and declining pH. Here, the modelled benefit of reduced exposure to dissolved inorganic nitrogen (DIN) in terrestrial runoff, which raises the thermal tolerance of coastal coral communities on the central Great Barrier Reef (Australia), is considered alongside alternative future warming scenarios. The simulations highlight that an 80% reduction in DIN ‘buys’ an additional ~50–60 years of reef-building capacity for No Mitigation (‘business-as-usual’) bleaching projections. Moreover, the integrated management benefits provided by: (i) local reductions of ~50% in DIN contained in river loads, and (ii) global stabilisation of atmospheric CO2 below 450 ppm can help ensure the persistence of hard-coral-dominated reefscapes beyond 2100. The simulations reinforce the message that beyond the global imperative to mitigate future atmospheric CO2 emissions there still remains the need for effective local management actions that enhance the resistance and resilience of coral reef communities to the impacts of climate change.