• 主题
高级搜索  >
历史搜索 清空历史
首页> 美国卫生研究院文献>Proceedings of the National Academy of Sciences of the United States of America >pH homeostasis during coral calcification in a free ocean CO2 enrichment (FOCE) experiment Heron Island reef flat Great Barrier Reef
【2h】

pH homeostasis during coral calcification in a free ocean CO2 enrichment (FOCE) experiment Heron Island reef flat Great Barrier Reef

机译：在自由海洋CO2浓缩（FOCE）实验中珊瑚钙化过程中的pH稳态苍鹭岛礁滩大堡礁

代理获取
本网站仅为用户提供外文OA文献查询和代理获取服务，本网站没有原文。下单后我们将采用程序或人工为您竭诚获取高质量的原文，但由于OA文献来源多样且变更频繁，仍可能出现获取不到、文献不完整或与标题不符等情况，如果获取不到我们将提供退款服务。请知悉。
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Geochemical analyses (δ11B and Sr/Ca) are reported for the coral Porites cylindrica grown within a free ocean carbon enrichment (FOCE) experiment, conducted on the Heron Island reef flat (Great Barrier Reef) for a 6-mo period from June to early December 2010. The FOCE experiment was designed to simulate the effects of CO2-driven acidification predicted to occur by the end of this century (scenario RCP4.5) while simultaneously maintaining the exposure of corals to natural variations in their environment under in situ conditions. Analyses of skeletal growth (measured from extension rates and skeletal density) showed no systematic differences between low-pH FOCE treatments (ΔpH = ∼−0.05 to −0.25 units below ambient) and present day controls (ΔpH = 0) for calcification rates or the pH of the calcifying fluid (pHcf); the latter was derived from boron isotopic compositions (δ11B) of the coral skeleton. Furthermore, individual nubbins exhibited near constant δ11B compositions along their primary apical growth axes (±0.02 pHcf units) regardless of the season or treatment. Thus, under the highly dynamic conditions of the Heron Island reef flat, P. cylindrica up-regulated the pH of its calcifying fluid (pHcf ∼8.4–8.6), with each nubbin having near-constant pHcf values independent of the large natural seasonal fluctuations of the reef flat waters (pH ∼7.7 to ∼8.3) or the superimposed FOCE treatments. This newly discovered phenomenon of pH homeostasis during calcification indicates that coral living in highly dynamic environments exert strong physiological controls on the carbonate chemistry of their calcifying fluid, implying a high degree of resilience to ocean acidification within the investigated ranges.
机译：据报道，在Heron Island礁滩（大堡礁）上进行的自由海洋碳富集（FOCE）实验中生长的珊瑚Porites cylindrica的地球化学分析（δ 11 B和Sr / Ca）据报道。从2010年6月到2010年12月上旬为期6个月。FOCE实验旨在模拟预计到本世纪末发生的CO2驱动的酸化作用（场景RCP4.5），同时保持珊瑚暴露于自然环境中。原位条件下环境的变化。骨骼生长的分析（根据延伸率和骨骼密度测量）显示，低pH FOCE处理（ΔpH=低于环境值-0.05至-0.25单位）与当前对照（ΔpH= 0）之间的钙化率或钙化液的pH（pHcf）；后者来自珊瑚骨架的硼同位素组成（δ 11 B）。此外，无论季节或处理方式如何，单个核蛋白在其主要根尖生长轴上均表现出接近恒定的δ 11 B组成（±0.02 pHcf单位）。因此，在苍鹭岛礁滩的高度动态条件下，P。cylindrica上调了钙化液的pH（pHcf〜8.4-8.6），每个小核的pHcf值均接近恒定，而与大的自然季节性波动无关礁滩水（pH约7.7至8.3）或FOCE叠加处理。这种新发现的钙化过程中pH稳态的现象表明，生活在高度动态环境中的珊瑚对其钙化液的碳酸盐化学性质具有强大的生理控制作用，这意味着在研究范围内对海洋酸化具有高度的适应力。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
代理获取

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号