Thermal stress and tropical reefs: mass coral bleaching in a stable temperature environment?

被引:26
|
作者
de Oliveira Soares, Marcelo [1 ,2 ]
Peres Teixeira, Carlos Eduardo [1 ]
Cavalcante Ferreira, Sarah Maria [1 ]
Alves Reboucas Gurgel, Anne Larisse [1 ]
Paiva, Barbara Pereira [1 ]
Bezerra Menezes, Maria Ozilea [1 ]
Davis, Marcus [1 ,3 ]
Lopes Tavares, Tallita Cruz [1 ]
机构
[1] Univ Fed Ceara, Inst Ciencias Mar LABOMAR, Av Abolicao 3207, Fortaleza, Ceara, Brazil
[2] UAB, ICTA, Edif Z, Barcelona, Spain
[3] Mar Ceara, Fortaleza, Ceara, Brazil
关键词
ENSO; Coral reef; Temperature; Climate change; Siderastrea stellata; Brazil; SEA-SURFACE TEMPERATURE; CLIMATE-CHANGE; BRAZIL; IMPACTS; COAST; VARIABILITY; ECOSYSTEMS; PATTERNS; ISLAND; EVENT;
D O I
10.1007/s12526-019-00994-4
中图分类号
X176 [生物多样性保护];
学科分类号
090705 ;
摘要
This study reports on the deepest records (~ 24 m depth) of coral bleaching in a naturally temperature-stable environment (> 26 degrees C with an intra-annual variability of ~ 2 degrees C), which was recorded during a mass bleaching event in the locally dominant, massive scleractinian coral Siderastrea stellata in equatorial waters of Brazil (SW Atlantic). An inter-annual analysis (2002-2017) indicated that this bleaching event was related to anomalies in sea surface temperature (SST) that led to the warmest year (2010) in this century (1 to 1.7 degrees C above average). Such anomalies caused heat stress (28.5-29.5 degrees C) in this equatorial environment that resulted in a bleaching event. Our results suggest that the increase in SST, low turbidity, and weak winds may have acted together to affect these stress-tolerant corals in marginal reefs. The equatorial coastline of Brazil is characterized by low intra-annual and inter-annual variations in SST, which suggests that the S. stellata corals here may be acclimatized to these stable conditions and, consequently, have a lower bleaching threshold because of lower historical heat stress.
引用
收藏
页码:2921 / 2929
页数:9
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