AuthorsDuarte, Gustavo A. S.
Villela, Helena D. M.
Cardoso, Pedro M.
Vilela, Caren L. S.
Messias, Camila S. M. A.
Chacon, Maria Alejandra
Santoro, Erika P.
Olmedo, Daniele B.
Rocha, Luiz A.
Peixoto, Raquel S.
AffiliationFederal University of Rio de Janeiro, Rio de Janeiro, Brazil
Rio de Janeiro Marine Aquarium Research Center, Rio de Janeiro, Brazil
California Academy of Sciences, San Francisco, CA, United States
University of Derby
University of California
MetadataShow full item record
AbstractCoral reefs are threatened by climate change on a global scale with thermal stress events and mass coral bleaching being widely reported. The reefs off the east coast of Brazil (and other turbid areas) have, however, historically escaped such thermal stress events, with relatively low levels of background coral mortality (5–10%). This has recently changed. Here we show that, in 2019, degree heating weeks (DHW) of 19.65 coincided with catastrophic declines in coral cover, especially in the major reef building hydrocoral Millepora alcicornis. The decline was due to bleaching associated with exposure to high temperature stress culminating in DHW values exceeding 15 for a period of 50 days. At two independent sites, surveys showed upwards of 83.5 ± 9.0 and 89.1 ± 3.9% mortality, and a third site showed relatively lower (albeit still high) mortality rates of 43.3 ± 12.0%. The mass die-off in 2019 is unprecedented in the South Atlantic reefs and coincides with increased heating events.
CitationDuarte, G.A., Villela, H.D., Deocleciano, M., Silva, D., Barno, A., Cardoso, P.M., Vilela, C.L., Rosado, P., Messias, C.S., Chacon, M.A. and Santoro, E.P., (2020). 'Heat waves are a major threat to turbid coral reefs in Brazil'. Frontiers in Marine Science, 7, pp. 1-8.
PublisherFrontiers Media SA
JournalFrontiers in Marine Science
Except where otherwise noted, this item's license is described as https://creativecommons.org/licenses/by/4.0/