Experience shapes the susceptibility of a reef coral to bleaching

Brown, Barbara E.; Dunne, R. P.; Goodson, Michael S.; Douglas, Angela E.

doi:10.1007/s00338-002-0215-z

Cited by 248 publications

(145 citation statements)

References 43 publications

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“…Therefore, we suspect that the constantly high temperatures in the bays of Palau were conducive to thermal acclimatization, whereas the same species in Japan were not acclimatized to high temperatures and suffered extensive mortality during regional thermal stress. Yet, chronic photoinhibition, or bleaching, is a consequence of the interaction between temperature and irradiance, which both target the reaction centers of the photosynthetic apparatus of symbiotic dinoflagellates (Iglesias-Prieto et al 1992;Brown et al 2002;Takahashi et al 2004). Photoinhibition during bleaching events is caused by excessive irradiance that damages the photosynthetic reaction centers of PSII molecules (Iglesias-Prieto et al 1992;Takahashi et al 2004).…”

Section: Thermal Stressmentioning

confidence: 99%

Climate‐change refugia in the sheltered bays of Palau: analogs of future reefs

Woesik

Houk

Isechal

et al. 2012

Ecology and Evolution

171

157

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Coral bleaching and mortality are predicted to increase as climate change-induced thermal-stress events become more frequent. Although many studies document coral bleaching and mortality patterns, few studies have examined deviations from the expected positive relationships among thermal stress, coral bleaching, and coral mortality. This study examined the response of >30,000 coral colonies at 80 sites in Palau, during a regional thermal-stress event in 2010. We sought to determine the spatial and taxonomic nature of bleaching and examine whether any habitats were comparatively resistant to thermal stress. Bleaching was most severe in the northwestern lagoon, in accordance with satellite-derived maximum temperatures and anomalous temperatures above the long-term averages. Pocillopora populations suffered the most extensive bleaching and the highest mortality. However, in the bays where temperatures were higher than elsewhere, bleaching and mortality were low. The coral-community composition, constant exposure to high temperatures, and high vertical attenuation of light caused by naturally high suspended particulate matter buffered the corals in bays from the 2010 regional thermal-stress event. Yet, nearshore reefs are also most vulnerable to land-use change. Therefore, nearshore reefs should be given high conservation status because they provide refugia for coral populations as the oceans continue to warm.

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Section: Thermal Stressmentioning

confidence: 99%

Climate‐change refugia in the sheltered bays of Palau: analogs of future reefs

Woesik

Houk

Isechal

et al. 2012

Ecology and Evolution

171

157

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“…(Maynard et al, 2008; Yee, Santavy & Barron, 2008; Guest et al, 2012; Harii et al, 2014; McClanahan, 2014). Thermal tolerance increases with repeated excessive thermal stress (Brown et al, 2002; Maynard et al, 2008; Guest et al, 2012), highlighting the potential of corals to adapt to thermal stress (Brown et al, 2002; Maynard et al, 2008; Guest et al, 2012). However, the effects of past thermal conditions have not been fully explained with historical SST variability in our analysis or in previous studies (Donner, 2011; McClanahan, Maina & Ateweberhan, 2015).…”

Section: Discussionmentioning

confidence: 99%

“…Coral reefs are one of the most susceptible ecosystems to global warming and local environmental stressors (Hoegh-Guldberg, 1999; West & Salm, 2003). Rising sea-surface temperatures (SST) can cause bleaching in reef-building corals, especially during summer (Hoegh-Guldberg, 1999; Brown et al, 2002; West & Salm, 2003). Excessive thermal stress leads to expulsion, digestion, or reduced pigmentation of symbiotic dinoflagellate algae in coral cells, resulting in the exposure of white coral skeletons (i.e., bleaching; Hoegh-Guldberg, 1999; Brown et al, 2002).…”

Section: Introductionmentioning

confidence: 99%

“…Rising sea-surface temperatures (SST) can cause bleaching in reef-building corals, especially during summer (Hoegh-Guldberg, 1999; Brown et al, 2002; West & Salm, 2003). Excessive thermal stress leads to expulsion, digestion, or reduced pigmentation of symbiotic dinoflagellate algae in coral cells, resulting in the exposure of white coral skeletons (i.e., bleaching; Hoegh-Guldberg, 1999; Brown et al, 2002). Prolonged warming trends in sea temperature have been predicted to increase the frequency and severity of bleaching in the future, leading to mass mortality of corals (Hoegh-Guldberg, 1999; Donner et al, 2005; Donner, 2009; McClanahan, Maina & Ateweberhan, 2015).…”

Section: Introductionmentioning

confidence: 99%

“…Previous studies have suggested that thermal stress of 1 °C or below can induce coral bleaching (Brown, 1997; McWilliams et al, 2005; Kleypas, Danabasoglu & Lough, 2008). In addition, historical temperature variability can affect bleaching and coral resilience (Brown et al, 2002; West & Salm, 2003). As a consequence, some studies have used modified indices, such as the sum of thermal stress over 0 °C above baseline SST (Yee, Santavy & Barron, 2008; Kayanne, 2017).…”

Section: Introductionmentioning

confidence: 99%

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High-resolution modeling of thermal thresholds and environmental influences on coral bleaching for local and regional reef management

Kumagai

Yamano

2018

PeerJ

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Coral reefs are one of the world’s most threatened ecosystems, with global and local stressors contributing to their decline. Excessive sea-surface temperatures (SSTs) can cause coral bleaching, resulting in coral death and decreases in coral cover. A SST threshold of 1 °C over the climatological maximum is widely used to predict coral bleaching. In this study, we refined thermal indices predicting coral bleaching at high-spatial resolution (1 km) by statistically optimizing thermal thresholds, as well as considering other environmental influences on bleaching such as ultraviolet (UV) radiation, water turbidity, and cooling effects. We used a coral bleaching dataset derived from the web-based monitoring system Sango Map Project, at scales appropriate for the local and regional conservation of Japanese coral reefs. We recorded coral bleaching events in the years 2004–2016 in Japan. We revealed the influence of multiple factors on the ability to predict coral bleaching, including selection of thermal indices, statistical optimization of thermal thresholds, quantification of multiple environmental influences, and use of multiple modeling methods (generalized linear models and random forests). After optimization, differences in predictive ability among thermal indices were negligible. Thermal index, UV radiation, water turbidity, and cooling effects were important predictors of the occurrence of coral bleaching. Predictions based on the best model revealed that coral reefs in Japan have experienced recent and widespread bleaching. A practical method to reduce bleaching frequency by screening UV radiation was also demonstrated in this paper.

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El Niño, Sea Surface Temperature Anomaly and Coral Bleaching in the South Atlantic: A Chain of Events Modeled With a Bayesian Approach

2018

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Coral bleaching represents one of the main climate‐change related threats to reef ecosystems. This research represents a methodological alternative for modeling this phenomenon, focused on assessing uncertainties and complexities with a low number of observations. To develop this model, intermittent reef monitoring data from the largest reef complex in the South Atlantic collected over nine summers between 2000 and 2014 were used with remote sensing data to construct and train a bleaching seasonal prediction model. The Bayesian approach was used to construct the network as it is suitable for hierarchically organizing local thermal variables and combining them with El Niño indicators from the preceding winter to generate accurate bleaching predictions for the coming season. Network count information from six environmental indicators was used to calculate the probability of bleaching, which is mainly influenced by the combined information of two thermal indices; one thermal index is designed to track short period anomalies in the early summer that are capable of triggering bleaching (SST of five consecutive days), and the other index is responsible for tracking the accumulation of thermal stress over time, an index called degree heating trimester (DHT). In addition to developing the network, this study conducted the three tests of applicability proposed for model: 1‐ Perform the forecast of coral bleaching for the summer of 2016; 2‐ Investigate the role of turbidity during the bleaching episodes; and 3‐ Use the model information to identify areas with a lower predisposition to bleaching events.

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Experience shapes the susceptibility of a reef coral to bleaching

Cited by 248 publications

References 43 publications

Climate‐change refugia in the sheltered bays of Palau: analogs of future reefs

Climate‐change refugia in the sheltered bays of Palau: analogs of future reefs

High-resolution modeling of thermal thresholds and environmental influences on coral bleaching for local and regional reef management

El Niño, Sea Surface Temperature Anomaly and Coral Bleaching in the South Atlantic: A Chain of Events Modeled With a Bayesian Approach

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