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首页> 外文期刊>Oceanographic Literature Review >Porites Coral on a Remote Reef Reveal Marine Phosphorus Biogeochemical Cycling Following Artificial Disturbance
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Porites Coral on a Remote Reef Reveal Marine Phosphorus Biogeochemical Cycling Following Artificial Disturbance

机译：在远程礁石上的Porites珊瑚揭示了人工干扰后的海洋磷生物地球化学循环

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摘要

Excess anthropogenic phosphorus (P) supplied to marine systems, which may subsequently jeopardize ecosystem structure and function, has altered the P balance and quadrupled its flow. However, due to the diversity of P sources, the unpredictability and variability of human activities, and the absence of long-term records, it remains uncertain how long the effects of excess P persist in aquatic ecosystems, and whether it stimulates gross primary productivity. In this study, we utilized geochemical proxies in coral skeletons from an atoll in the Xisha Islands of the South China Sea to reconstruct historical patterns of P in surface seawater. This atoll has remained in a natural state for an extended period of time, except for a short period of unambiguously documented guano extraction. Analyses of coral skeletons dating back to 1851 CE distinctly show that the P concentration in surface seawater increased abnormally in the 1960s. We deduced that guano extraction at that time led to an abrupt increase in the long-term equilibrium of seawater P concentration. Subsequent P addition appeared to have continued for at least ~30 years after phosphorite exploitation ceased, and P showed a decay period that was longer than that of other elements. Similar temporal trends of coral P/Ca and δ~(13)C indicated that elevated marine primary productivity was associated with increased P. Large inputs within a short period, as well as the continued influence of P over the long term, can serve as a natural ecological analog for coral reefs subject to nutrient contamination.
机译：提供给海洋系统的过量的人为磷（P），随后可能会危害生态系统结构和功能，改变了P平衡和二次流动。然而，由于P来源的多样性，人类活动的不可预测性和可变性以及缺乏长期记录，它仍然不确定过量P持续在水生生态系统中的影响，以及它是否刺激总初级生产力。在这项研究中，我们在南海西沙群岛的环礁中利用了地球化学代理，以重建地面海水中P的历史模式。除了未明确记录的瓜骋提取之外，这种环礁在很长一段时间内保持着自然状态。珊瑚骨架的分析追溯到1851年CE明显表明，20世纪60年代，表面海水中的P浓度异常增加。我们推导过当时的鸟粪提取导致海水P浓度的长期平衡突然增加。随后的P添加似乎在磷酸盐剥削停止后持续〜30年，并且P显示比其他元素更长的衰减期。类似的珊瑚p / ca和δ〜（13）c的时间趋势表明，升高的海洋初级生产率与短时间内的大型投入增加有关，以及P长期的持续影响，可以作为珊瑚礁的天然生态模拟受营养污染。

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  • 来源
    《Oceanographic Literature Review》 |2020年第10期|2134-2135|共2页
  • 作者

    W. Jiang; H. Yang; K. Yu;

  • 作者单位

    Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai) Zhuhai China;

    Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai) Zhuhai China;

    Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai) Zhuhai China;

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