The severe 2020 coral bleaching event in the tropical Atlantic linked to marine heatwaves

Communications Earth & Environment, Journal Year: 2025, Volume and Issue: 6(1)

Published: March 18, 2025

Language: Английский

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The Thermal Stress History of South Atlantic Reefs Reveals Increasing Intensity, Duration, Frequency, and Likely Undocumented Bleaching Episodes

Global Change Biology, Journal Year: 2025, Volume and Issue: 31(4)

Published: April 1, 2025

The primary consequence of global warming for reefs is coral bleaching, often leading to extensive mortality. Although bleaching well-documented globally, the thermal stress and experienced by unique South Atlantic remain largely unknown due insufficient monitoring on both spatial temporal scales. Therefore, this work aimed reconstruct past episodes across reefs, assessed whether are becoming more intense, longer-lasting, frequent. We retrieved daily 5 km-resolution Degree Heating Week (DHW) data from U.S. National Oceanic Atmospheric Administration Coral Reef Watch server 33 reef sites spanning last 40 years. For each episode, we intensity (maximum DHW value), duration (number continuous days under stress), frequency between episodes). Generalized linear models were fitted intensity, duration, evaluate influence latitude time x region interaction as predictors. recorded multiple episodes, increasing 2010 onwards, ranging 10 1985-89 75 2020-24. Intensity increased over entire Atlantic. Frequency also Southwestern coast oceanic islands, but not Africa. Episodes at higher latitudes prolonged, validity history reconstruction was groundtruthed using information Abrolhos Bank, only consistently monitored site in Atlantic-DHW accurately matched observed site. With this, our dataset shows that likely occurred Atlantic, went undocumented field. currently available underestimates extent occurring area, which experiencing increases stress.

Language: Английский

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Thirty years of coral bleaching in the Southwestern Atlantic Ocean: a historical assessment based on degree heating week indices

Coral Reefs, Journal Year: 2025, Volume and Issue: unknown

Published: April 2, 2025

Language: Английский

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Water Depth Correction-Based Classification Combination Method for Extracting Shallow Sea Reef Geomorphological Information: A Case Study of Xisha Chau and Zhaoshu Island

Journal of Marine Science and Engineering, Journal Year: 2025, Volume and Issue: 13(2), P. 300 - 300

Published: Feb. 6, 2025

Remote sensing monitoring and geomorphologic change analysis of coral reefs are great practical significance for the ecological protection sustainable development reef area resources. A WBMD scheme is proposed to better extract information from island environments Xisha, China. Satellite imagery, after preprocessing, subjected water depth correction mitigate influence on reflectance. maximum likelihood classification model then used geomorphological classification, followed by refinement through a decision tree model, forming scheme. The overall accuracy Xisha Chau Zhaoshu Island based was 97.07% 95.07%. Using this analyze geomorphology 2014 2018 reveals that degradation mainly distributed in lagoon slope around lagoon, has been shrinking year year, while gray sand increased, areas other types exhibit fluctuating changes. Previous studies have indicated area, where significant also observed, raising an alarm conservation efforts

Language: Английский

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Bacterial Diversity Associated with Millepora alcicornis, Phyllogorgia dilatata and Mussismilia harttii Collected from Two Distinct Corals Reefs on the Brazilian Coast

Journal of Marine Science and Engineering, Journal Year: 2025, Volume and Issue: 13(2), P. 358 - 358

Published: Feb. 15, 2025

Corals can be considered holobiont organisms, since they have an important symbiotic relationship with microbial communities such as zooxanthellae, bacteria, Archaea, fungi and viruses. It is to understand how those influence the health of corals environmental conditions could affect them. The present study aimed describe bacterial associated three Brazilian coral species, Millepora alcicornis, Mussismilia harttii Phyllogorgia dilatata, by a culture-independent method, using 16S rRNA gene sequencing. were collected from two distinct reefs: Recife de Fora, in Bahia (BA) Búzios, Rio Janeiro (RJ). phylum Proteobacteria showed highest relative abundance most sites. compositions these sample sites very each other, not presenting similarities species or related sampling site. In M. alcicornes/RJ, abundant class was Gammaproteobacteria, order Piscirickettsiales, while same BA unassigned Vibrionaceae second family. harttii/BA presented composition 16 phyla (26% Proteobacteria, 16% Chloroflexi, 12% Acidobacteriota).

Language: Английский

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The Southwestern Atlantic coral Mussismilia hispida exhibit remarkable tolerance to nitrate enrichment

Coral Reefs, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 25, 2025

Language: Английский

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Differential effects of iron enrichment on corals competing with macroalgae and zoantharians

Environmental Pollution, Journal Year: 2025, Volume and Issue: 371, P. 125944 - 125944

Published: Feb. 28, 2025

Language: Английский

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Interannual health status stability of the reef-building coral Montastraea cavernosa in a Southwestern Atlantic marginal reef

Marine Environmental Research, Journal Year: 2025, Volume and Issue: unknown, P. 107104 - 107104

Published: March 1, 2025

Language: Английский

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Challenges for coral restoration in Southwestern Atlantic reefs: guidelines for ethical and sustainable practices

Biodiversity and Conservation, Journal Year: 2025, Volume and Issue: unknown

Published: April 17, 2025

Language: Английский

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Calcium carbonate production by the massive coral Mussismilia hispida in subtropical reefs of the Southwestern Atlantic

Marine Environmental Research, Journal Year: 2025, Volume and Issue: 209, P. 107218 - 107218

Published: May 10, 2025

Language: Английский

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