Assessment of the impacts of rapid Marine Heatwaves and cumulative thermal stress on cold-water upwelling coral refugia

Geomatics Natural Hazards and Risk, Journal Year: 2025, Volume and Issue: 16(1)

Published: Jan. 3, 2025

This study introduces a combined Marine Heatwaves-Degree Heating Weeks (MHW-DHW) analysis to evaluate climate change impacts on three coral refugia: Green Island, Nanwan Bay, and Dongsha Atoll. MHWs reflect rapid rises in Sea Surface Temperature (SST) their timing, while DHW captures sustained high SSTs, indicating thermal stress, potential bleaching risks, vulnerability of habitats. Since 2016, MHW development has significantly increased annual stress. Between 2020 2022, nearly half each year they faced threats corresponding Bleaching Alert Levels 2 3. Historically, events were linked strong El Niño transitioning La Niña conditions during the negative phase Pacific Decadal Oscillation; however, recent global ocean warming masked this pattern. Periodic cooling due upwelling these habitats is not fully captured by CoralTemp dataset smoothing low spatial resolution. SST values differ from Himawari satellite observations about 1 1.4 °C daily minima, leading average discrepancies 0.2–0.5 °C. suggests diurnal temperature variations may still mitigate temperatures. Furthermore, multi-satellite data revealed that affected chlorophyll concentrations within

Language: Английский

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Spatial and seasonal distribution of microplastics on sandy beaches along the coast of the Hengchun Peninsula, Taiwan

Marine Pollution Bulletin, Journal Year: 2020, Volume and Issue: 151, P. 110861 - 110861

Published: Jan. 29, 2020

Language: Английский

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Organic ultraviolet filter mixture promotes bleaching of reef corals upon the threat of elevated seawater temperature

The Science of The Total Environment, Journal Year: 2023, Volume and Issue: 876, P. 162744 - 162744

Published: March 11, 2023

Language: Английский

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Legacy effects of anthropogenic disturbances modulate dynamics in the world's coral reefs

Global Change Biology, Journal Year: 2023, Volume and Issue: 29(12), P. 3285 - 3303

Published: March 18, 2023

Rapidly changing conditions alter disturbance patterns, highlighting the need to better understand how transition from pulse disturbances more persistent stress will impact ecosystem dynamics. We conducted a global analysis of impacts 11 types on reef integrity using rate change coral cover as measure damage. Then, we evaluated magnitude damage due thermal stress, cyclones, and diseases varied among tropical Atlantic Indo-Pacific reefs whether cumulative cyclones was able modulate responses future events. found that largely depends condition before disturbance, intensity, biogeographic region, regardless type disturbance. Changes in after events were influenced by past did not depend intensity or initial cover, which suggests an ecological memory is present within communities. In contrast, effect (and likely other physical impacts) primarily modulated appear be previous impacts. Our findings also underscore can recover if stressful decrease, yet lack action reduce anthropogenic greenhouse gas emissions continues trigger degradation. uphold evidence-based strategies guide managers make decisions prepare for disturbances.

Language: Английский

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Decadal stability in coral cover could mask hidden changes on reefs in the East Asian Seas

Communications Biology, Journal Year: 2023, Volume and Issue: 6(1)

Published: June 10, 2023

Coral reefs in the Central Indo-Pacific region comprise some of most diverse and yet threatened marine habitats. While reef monitoring has grown throughout recent years, studies coral benthic cover remain limited spatial temporal scales. Here, we analysed 24,365 surveys performed over 37 years at 1972 sites East Asia by Global Reef Monitoring Network using Bayesian approaches. Our results show that overall surveyed not declined as suggested previous compared to regions like Caribbean. Concurrently, macroalgal increased, with no indications phase shifts from dominance on reefs. Yet, models incorporating socio-economic environmental variables reveal negative associations coastal urbanisation sea surface temperature. The diversity assemblages may have mitigated declines thus far, but climate change could threaten resilience. We recommend prioritisation regionally coordinated, locally collaborative long-term for better contextualisation data analyses, which are essential achieving conservation goals.

Language: Английский

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Investigation of the Kuroshio-coastal current interaction and marine heatwave trends in the coral habitats of Northeastern Taiwan

Regional Studies in Marine Science, Journal Year: 2024, Volume and Issue: 71, P. 103431 - 103431

Published: Feb. 11, 2024

Language: Английский

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Antibiotics Alter Pocillopora Coral-Symbiodiniaceae-Bacteria Interactions and Cause Microbial Dysbiosis During Heat Stress

Frontiers in Marine Science, Journal Year: 2022, Volume and Issue: 8

Published: Jan. 13, 2022

Symbioses between eukaryotes and their associated microbial communities are fundamental processes that affect organisms’ ecology evolution. A unique example of this is reef-building corals maintain symbiotic associations with dinoflagellate algae (Symbiodiniaceae) bacteria coral health through various mechanisms. However, little understood about how coral-associated holobiont heat tolerance. In study, we investigated these interactions in four Pocillopora colonies belonging to three cryptic species by subjecting fragments treatments antibiotics intended suppress the normal community, followed acute stress. Separate only or stress were conducted compare effects individual stressors on transcriptome responses microbiome shifts. Across all examined, combined treatment significantly altered caused major changes both Cladocopium algal symbiont gene expression. Individually, impaired protein translation activated DNA repair processes, while downregulation amino acid inorganic ion transport metabolism genes photosynthesis genes. Combined antibiotics-heat synergistic expression including enhanced oxidative response genes, programed cell death pathways proteolytic enzymes indicate an exacerbated following community suppression. Collectively, results provide further evidence Symbiodiniaceae engage highly coordinated metabolic crucial for health, homeostasis,

Language: Английский

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Variable responses to chronic and acute elevated temperature of three coral species from reefs with distinct thermal regimes

Marine Biology, Journal Year: 2022, Volume and Issue: 169(7)

Published: July 1, 2022

Language: Английский

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Learning from the past is not enough to survive present and future bleaching threshold temperatures

The Science of The Total Environment, Journal Year: 2022, Volume and Issue: 852, P. 158379 - 158379

Published: Aug. 31, 2022

Language: Английский

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Potential molecular traits underlying environmental tolerance of Pavona decussata and Acropora pruinosa in Weizhou Island, northern South China Sea

Marine Pollution Bulletin, Journal Year: 2020, Volume and Issue: 156, P. 111199 - 111199

Published: May 11, 2020

Language: Английский

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