...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Algae >Species-specific responses of temperate macroalgae with different photosynthetic strategies to ocean acidification: a mesocosm study
【24h】

Species-specific responses of temperate macroalgae with different photosynthetic strategies to ocean acidification: a mesocosm study

机译：具有不同光合作用策略的温带大藻对海洋酸化的物种特异性反应：中观研究

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Concerns about how ocean acidification will impact marine organisms have steadily increased in recent years, but there is a lack of knowledge on the responses of macroalgae. Here, we adopt an outdoor continuous-flowing mesocosm system designed for ocean acidification experiment that allows high CO2 conditions to vary with natural fluctuations in the environment. Following the establishment of the mesocosm, five species of macroalgae that are common along the coast of Korea (namely Ulva pertusa, Codium fragile, Sargassum thunbergii, S. horneri, and Prionitis cornea) were exposed to three different CO2 concentrations: ambient (×1) and elevated CO2 (2× and 4× ambient), over two-week period, and their ecophysiological traits were measured. Results indicated that both photosynthesis and growth exhibited species-specific responses to the different CO2 concentrations. Most notably, photosynthesis and growth increased in S. thunbergii when exposed to elevated CO2 conditions but decreased in P. cornea. The preference for different inorganic carbon species (CO2 and HCO3?), which were estimated by gross photosynthesis in the presence and absence of the external carbonic anhydrase (eCA) inhibitor acetazolamide, were also found to vary among species and CO2 treatments. Specifically, the two Sargassum species exhibited decreased eCA inhibition of photosynthesis with increased growth when exposed to high CO2 conditions. In contrast, growth of U. pertusa and C. fragile were not notably affected by increased CO2. Together, these results suggest that the five species of macroalgae may respond differently to changes in ocean acidity, with species-specific responses based on their differentiated photosynthetic acclimation. Understanding these physiological changes might allow us to better predict future changes in macroalgal communities in a more acidic ocean.
机译：近年来，人们对海洋酸化将如何影响海洋生物的担忧不断增加，但是对大型藻类的反应缺乏了解。在这里，我们采用了一种为海洋酸化实验而设计的室外连续流动的介观体系，该体系允许高CO 2 条件随环境的自然波动而变化。介观膜建立后，在韩国沿海常见的五种大型藻类（即Ulva pertusa，Codium脆弱，Sargassum thunbergii，S。horneri和Prionitis角膜）暴露于三种不同的CO 2 sub>浓度：两周内的环境浓度（×1）和CO 2 浓度升高（2x和4x环境浓度），并测量了它们的生态生理特性。结果表明，光合作用和生长对不同浓度的CO 2 都表现出种特异性反应。最明显的是，当暴露于升高的CO 2 条件下时，S。thunbergii的光合作用和生长增加，但在角膜假单胞菌中下降。在存在和不存在有机碳的情况下，通过总光合作用估算的不同无机碳种类（CO 2 和HCO 3 ？）的优先级。还发现外部碳酸酐酶（eCA）抑制剂乙酰唑胺在物种和CO 2 处理之间有所不同。具体来说，当暴露于高CO 2 条件下时，这两种马尾藻对光合作用的eCA抑制作用降低，且生长增加。相反，CO 2 的增加对百日草和脆弱梭菌的生长影响显着。总之，这些结果表明，五种大型藻类对海洋酸度变化的反应可能不同，基于它们差异化的光合作用，它们具有种特异性反应。了解这些生理变化可能使我们能够更好地预测更酸性海洋中大型藻类群落的未来变化。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

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