Author: ["I. C. Enochs","D. P. Manzello","E. M. Donham","G. Kolodziej","R. Okano","L. Johnston","C. Young","J. Iguel","C. B. Edwards","M. D. Fox","L. Valentino","S. Johnson","D. Benavente","S. J. Clark","R. Carlton","T. Burton","Y. Eynaud","N. N. Price"]
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Abstract
A shift from coral to macroalgae dominance of reef systems affected by volcanically acidified waters around Maug (Mariana Islands, North Pacific Ocean) increases fears that reef corals will be displaced by algae as a result of ocean acidification. Rising anthropogenic CO2 in the atmosphere is accompanied by an increase in oceanic CO2 and a concomitant decline in seawater pH (ref. 1). This phenomenon, known as ocean acidification (OA), has been experimentally shown to impact the biology and ecology of numerous animals and plants2, most notably those that precipitate calcium carbonate skeletons, such as reef-building corals3. Volcanically acidified water at Maug, Commonwealth of the Northern Mariana Islands (CNMI) is equivalent to near-future predictions for what coral reef ecosystems will experience worldwide due to OA. We provide the first chemical and ecological assessment of this unique site and show that acidification-related stress significantly influences the abundance and diversity of coral reef taxa, leading to the often-predicted shift from a coral to an algae-dominated state4,5. This study provides field evidence that acidification can lead to macroalgae dominance on reefs.Cite this article
Enochs, I., Manzello, D., Donham, E. et al. Shift from coral to macroalgae dominance on a volcanically acidified reef. Nature Clim Change 5, 1083–1088 (2015). https://doi.org/10.1038/nclimate2758 