Seawater carbonate chemistry and benthic marine community during experiments, 2011 ...

• Main Authors: Kroeker, Kristy J, Micheli, Florenza, Gambi, Maria Cristina, Martz, Todd R
• Format: Dataset
• Language: English
• Published: PANGAEA - Publishing Network for Geoscientific and Environmental Data 2011
• Subjects: Ocean acidification
• Online Access: https://dx.doi.org/10.15468/yjux3w; https://www.gbif.org/dataset/2574dc4f-66c6-4d90-aad4-6c1e918ecb4f

Ocean acidification is predicted to impact all areas of the oceans and affect a diversity of marine organisms. However, the diversity of responses among species prevents clear predictions about the impact of acidification at the ecosystem level. Here, we used shallow water CO2 vents in the Mediterranean Sea as a model system to examine emergent ecosystem responses to ocean acidification in rocky reef communities. We assessed in situ benthic invertebrate communities in three distinct pH zones (ambient, low, and extreme low), which differed in both the mean and variability of seawater pH along a continuous gradient. We found fewer taxa, reduced taxonomic evenness, and lower biomass in the extreme low pH zones. However, the number of individuals did not differ among pH zones, suggesting that there is density compensation through population blooms of small acidification-tolerant taxa. Furthermore, the trophic structure of the invertebrate community shifted to fewer trophic groups and dominance by generalists in ...