Challenging Paradigms Around the Role of Colony Size, Taxa, and Environment on Bleaching Susceptibility

Global Change Biology, Journal Year: 2025, Volume and Issue: 31(2)

Published: Feb. 1, 2025

ABSTRACT Understanding how bleaching severity varies across space and among within taxa helps predict changes in community composition due to climate change informs conservation efforts. Photogrammetry offers a non‐invasive time effective method for quantifying attributes of thousands coral colonies large, environmentally diverse reef areas. This approach circumvents the limitations traditional survey methods, where detailed tracking individual comes at expense large sampling areas sample sizes. Using photogrammetry, we measured colony size scored > 5000 13 26 sites (> 7400 m 2 reef) during mild event central Great Barrier Reef (GBR) 2022. We quantified relationship between key biological environmental factors: size, taxonomic identity, degree‐heating weeks (DHWs), water velocity, various measures structural complexity, depth, distance coast. Our results show that probability decreased with increasing most taxa, contradicting current understanding size‐dependent bleaching. Counter conventional thinking, tabular Acropora spp. presented very low levels 2022 despite being severely bleached 1998, suggesting possible adaptation last two decades. high level idiosyncrasy gradients severity. For instance, effect depth on was taxon‐dependent wave velocity differed inshore offshore reefs. challenge prevailing paradigms around role environment regulating susceptibility, refugia are not universal but instead depend specific environment‐taxonomic combinations taxon‐specific

Language: Английский

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Limited persistence of the heat-tolerant zooxanthella, Durusdinium trenchii, in corals transplanted to a barrier reef where it is rare among natal colonies

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

Published: March 12, 2025

Language: Английский

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Coral‐associated Symbiodiniaceae exhibit host specificity but lack phylosymbiosis, with Cladocopium and Durusdinium showing different cophylogenetic patterns

New Phytologist, Journal Year: 2025, Volume and Issue: unknown

Published: May 3, 2025

Summary Altering the composition of Symbiodiniaceae community to adapt anomalous sea water warming represents a potential survival mechanism for scleractinian corals. However, processes assembly and long‐standing evolution coral–Symbiodiniaceae interactions remain unclear. Here, we utilized ITS2 (internal transcribed spacer 2) amplicon sequencing SymPortal framework investigate diversity specificity across 39 coral species. Furthermore, tested phylosymbiosis cophylogeny between hosts their Symbiodiniaceae. In our study, environmental samples exhibited highest diversity. Cladocopium Durusdinium dominated communities, with significant β‐diversity differences among Additionally, host was widespread in Symbiodiniaceae, especially spp., yet lacked phylosymbiotic pattern. Moreover, spp. showed cophylogenetic congruence hosts, while there no evidence switching predominant evolutionary event, implying its contribution diversification. These findings suggest that does not recapitulate phylogeny, alone drive or cophylogeny. As reservoirs, free‐living may influence symbiotic communities. Durusdinium– associations lack signals, indicating more flexible partnerships than . Overall, results enhance understanding interactions.

Language: Английский

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Mucus carbohydrate composition correlates with scleractinian coral phylogeny

Scientific Reports, Journal Year: 2024, Volume and Issue: 14(1)

Published: June 18, 2024

Abstract The mucus surface layer serves vital functions for scleractinian corals and consists mainly of carbohydrates. Its carbohydrate composition has been suggested to be influenced by environmental conditions (e.g., temperature, nutrients) microbial pressures degradation, coral symbionts), yet what extend the is determined phylogeny remains tested. To investigate variation compositions among species, we analyzed mucosal building blocks (i.e., monosaccharides) five species corals, supplemented with previously reported data, discern overall patterns using cluster analysis. Monosaccharide from a total 23 (belonging 14 genera 11 families) revealed significant differences between two phylogenetic clades that diverged early in evolutionary history complex robust; p = 0.001, R 2 0.20), driven absence arabinose robust clade. Despite considerable sample analysis protocols applied, significantly correlated monosaccharide (Mantel test: < 0.70). These results suggest carbohydrates display dependence support their essential role functioning corals.

Language: Английский

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Irradiance dependency of oxidative stress and coral bleaching

Coral Reefs, Journal Year: 2024, Volume and Issue: 43(5), P. 1393 - 1403

Published: Aug. 19, 2024

Language: Английский

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Niche breadth and divergence in sympatric cryptic coral species (Pocillopora spp.) across habitats within reefs and among algal symbionts

Evolutionary Applications, Journal Year: 2024, Volume and Issue: 17(8)

Published: Aug. 1, 2024

While the presence of morphologically cryptic species is increasingly recognized, we still lack a useful understanding what causes and maintains co-occurring its consequences for ecology, evolution, conservation communities. We sampled 724

Language: Английский

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