Physiological responses of the calcifying rhodophyte, Corallina officinalis (L.), to future CO2 levels
Physiological responses of the calcifying rhodophyte, Corallina officinalis (L.), to future CO2 levels
复制标题
DOI：
10.1007/s00227-011-1854-9
复制
发表时间：
2012-04-01
期刊：
影响因子：
2.4
通讯作者：
Bischof, Kai
中科院分区：
文献类型：
--
作者：
Hofmann, Laurie C.;Yildiz, Gamze;Bischof, Kai
未来大气中的二氧化碳水平很可能对海洋生物，特别是光合作用的钙化生物产生复杂的影响。珊瑚是一种直立的钙化大型藻类，发现于温带岩石海岸线的潮间带和潮下带，为海洋小型动物提供了重要的底物和避难所。目前研究的主要目标是确定药用植物对预计在下个世纪内及以后发生的二氧化碳浓度增加的生理反应。结果表明，在高CO2水平下，无机物的生长和产量下降，碳酸氢酶活性受到刺激，并与藻类无机含量呈负相关。以放氧为基础的光合作用效率也受到二氧化碳增加的负面影响。这项研究的结果表明，在未来的二氧化碳水平下，药用植物的竞争力可能会减弱，这可能会导致未来温带潮间带群落的结构变化。
Future atmospheric CO2 levels will most likely have complex consequences for marine organisms, particulary photosynthetic calcifying organisms. Corallina officinalis L. is an erect calcifying macroalga found in the inter- and subtidal regions of temperate rocky coastlines and provides important substrate and refugia for marine meiofauna. The main goal of the current study was to determine the physiological responses of C. officinalis to increased CO2 concentrations expected to occur within the next century and beyond. Our results show that growth and production of inorganic material decreased under high CO2 levels, while carbonic anhydrase activity was stimulated and negatively correlated to algal inorganic content. Photosynthetic efficiency based on oxygen evolution was also negatively affected by increased CO2. The results of this study indicate that C. officinalis may become less competitive under future CO2 levels, which could result in structural changes in future temperate intertidal communities.