Supplementary material from "Ocean acidification alters predator behaviour and reduces predation rate"
Posted on 2017-01-18 - 17:12
Ocean acidification poses a range of threats to marine invertebrates; however, the emerging and likely widespread effects of rising carbon dioxide (CO2) levels on marine invertebrate behaviour are still little understood. Here, we show that ocean acidification alters and impairs key ecological behaviours of the predatory cone snail Conus marmoreus. Projected near-future seawater CO2 levels (975 µatm) increased activity in this coral reef molluscivore more than threefold (from less than 4 to more than 12 mm.min−1) and decreased the time spent buried to less than one-third when compared with the present-day control conditions (385 µatm). Despite increasing activity, elevated CO2 reduced predation rate during predator–prey interactions with control-treated humpbacked conch, Gibberulus gibberulus gibbosus; 60% of control predators successfully captured and consumed their prey, compared with only 10% of elevated CO2 predators. The alteration of key ecological behaviours of predatory invertebrates by near-future ocean acidification could have potentially far-reaching implications for predator–prey interactions and trophic dynamics in marine ecosystems. Combined evidence that the behaviours of both species in this predator–prey relationship are altered by elevated CO2 suggests food web interactions and ecosystem structure will become increasingly difficult to predict as ocean acidification advances over coming decades.
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Watson, Sue-Ann; Fields, Jennifer B.; L. Munday, Philip (2017). Supplementary material from "Ocean acidification alters predator behaviour and reduces predation rate". The Royal Society. Collection. https://doi.org/10.6084/m9.figshare.c.3667951.v1