Effects of ocean acidification on Posidonia oceanica epiphytic community and shoot productivity

1. Biological interactions can alter predictions that are based on single-species physiological response. It is known that leaf segments of the seagrass Posidonia oceanica will increase photosynthesis with lowered pH, but it is not clear whether the outcome will be altered when the whole plant and its epiphyte community, with different respiratory and photosynthetic demands, are included. In addition, the effects on the Posidonia epiphyte community have rarely been tested under controlled conditions, at near-future pH levels. […]

1. 生物相互作用会改变基于单物种生理响应的预测结果。已有研究证实，海草（seagrass）类群中的波西多尼亚海草（Posidonia oceanica）的叶片片段在pH降低时，光合速率会提升；但当纳入整株植物及其附生生物群落时，由于不同类群存在各异的呼吸与光合需求，该效应是否会发生改变仍不明确。此外，在接近未来海洋pH水平的受控实验条件下，针对波西多尼亚海草附生生物群落的相关效应研究尚极为匮乏。[…]