Impact of ocean acidification and warming on the productivity of a rock pool community
2018
Abstract This study examined experimentally the combined effect of
ocean acidificationand warming on the productivity of rock
poolmulti-specific assemblages, composed of
coralline algae, fleshy algae, and grazers. Natural rock
poolcommunities experience high environmental fluctuations. This may confer physiological advantage to rock
poolcommunities when facing predicted acidification and warming. The effect of
ocean acidificationand warming have been assessed at both individual and assemblage level to examine the importance of species interactions in the response of assemblages. We hypothesized that rock
poolassemblages have physiological advantage when facing predicted
ocean acidificationand warming. Species exhibited species-specific responses to increased temperature and pCO 2 . Increased temperature and pCO 2 have no effect on assemblage photosynthesis, which was mostly influenced by fleshy algal
primary production. The response of
coralline algaeto
ocean acidificationand warming depended on the season, which evidenced the importance of physiological adaptations to their environment in their response to climate change. We suggest that rock
poolassemblages are relatively robust to changes in temperature and pCO 2 , in terms of
primary production.
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