Seawater carbonate chemistry and predator–prey interactions of coral reef fish

• Main Authors: Allan, Bridie J M, Domenici, Paolo, Watson, Sue Ann, Munday, Philip L, McCormick, Mark I
• Format: Dataset
• Language: English
• Published: PANGAEA 2017
• Subjects: Alkalinity; total; standard error; Animalia; Apparent looming threshold; Aragonite saturation state; Behaviour; Bicarbonate ion; Calcite saturation state; Calculated using seacarb after Nisumaa et al. (2010); Capture success; Carbon; inorganic; dissolved; Carbonate ion; Carbonate system computation flag; Carbon dioxide; Chordata; Coast and continental shelf; Containers and aquaria (20-1000 L or < 1 m**2); Experiment duration; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Laboratory experiment; Nekton; OA-ICC; Ocean Acidification International Coordination Centre; Partial pressure of carbon dioxide (water) at sea surface temperature (wet air); Pelagos; pH; Pomacentrus wardi; Predator attack distance; Predator attack speed; Prey escape distance; Prey escape speed; Prey reaction distance; Pseudochromis fuscus; Registration number of species; Salinity; South Pacific; Species; Species interaction; Temperature; water; Pacific; Ocean acidification
• Online Access: https://doi.pangaea.de/10.1594/PANGAEA.892529; https://doi.org/10.1594/PANGAEA.892529

Ocean acidification and warming, driven by anthropogenic CO2 emissions, are considered to be among the greatest threats facing marine organisms. While each stressor in isolation has been studied extensively, there has been less focus on their combined effects, which could impact key ecological processes. We tested the independent and combined effects of short-term exposure to elevated CO2 and temperature on the predator–prey interactions of a common pair of coral reef fishes (Pomacentrus wardi and its predator, Pseudochromis fuscus). We found that predator success increased following independent exposure to high temperature and elevated CO2. Overall, high temperature had an overwhelming effect on the escape behaviour of the prey compared with the combined exposure to elevated CO2 and high temperature or the independent effect of elevated CO2. Exposure to high temperatures led to an increase in attack and predation rates. By contrast, we observed little influence of elevated CO2 on the behaviour of the predator, suggesting that the attack behaviour of P. fuscus was robust to this environmental change. This is the first study to address how the kinematics and swimming performance at the basis of predator–prey interactions may change in response to concurrent exposure to elevated CO2 and high temperatures and represents an important step to forecasting the responses of interacting species to climate change.