Intra‐colony spatial variance of oxyregulation and hypoxic thresholds for key Acropora coral species

Ecology and Evolution, Journal Year: 2024, Volume and Issue: 14(3)

Published: March 1, 2024

Abstract Oxygen (O 2 ) availability is essential for healthy coral reef functioning, yet how continued loss of dissolved O via ocean deoxygenation impacts performance building corals remains unclear. Here, we examine intra‐colony spatial geometry important Great Barrier Reef (GBR) species Acropora may influence variation in hypoxic thresholds upregulation, to better understand capacity tolerate future reductions availability. We first evaluate the application more streamlined models used parameterise Hypoxia Response Curve data, that have been historically identify variable oxyregulatory capacity. Using closed‐system respirometry analyse drawdown rate, show a two‐parameter model returns similar outputs as previous 12th‐order descriptive statistics such average oxyregulation (T pos and ambient level at which exerts maximum regulation effort (P cmax ), diverse species. Following an experiment whether stress induced by fragmentation affected subsequently differences response interior exterior colony locations abrotanoides , cf. microphthalma elseyi . Average across was greater (0.78–1.03 ± SE 0.08) compared with (0.60–0.85 0.08). Moreover, P occurred relatively low p <30% (±1.24; SE) air saturation all species, colony. When against availability, these factors corresponded mean oxyregulation, suggesting lower corresponds higher oxyregulation. Collectively, our data affects thresholds, potentially driving

Language: Английский

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On the use of rapid acute heat tolerance assays to resolve ecologically relevant differences among corals

Coral Reefs, Journal Year: 2024, Volume and Issue: 43(6), P. 1793 - 1801

Published: Oct. 8, 2024

Language: Английский

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Local conditions modulated the effects of marine heatwaves on coral bleaching in subtropical Hong Kong waters

Coral Reefs, Journal Year: 2024, Volume and Issue: 43(5), P. 1235 - 1247

Published: July 26, 2024

Abstract A mass coral bleaching event occurred in the summer of 2022 subtropical Hong Kong, driven by two marine heatwaves (MHWs) with high intensities 1.56 and 0.86 °C above a mean climate condition, both MHWs 7 days short gap 4 during strong La Niña year. transect survey was conducted at nine study sites three regions, which revealed widespread bleached cover ranging from 2.4 to 70.3%. In situ environmental data presence thermocline halocline. Local conditions, including depth wave exposure, significantly influenced response. Shallow-water (2–4 m) corals were primarily affected, particularly sheltered moderately that exhibited higher levels (42.97 ± 15.4% 44.93 29.4%, respectively) compared exposed (31.8 5.2%). Bleaching deep waters (4–6 minimal, only few colonies Goniopora exhibiting (1.7 1.5%). Heat stress resistance differed between genera. Recovery rate for four common genera is low Acropora tumida . Additionally, minor hypoxia found cause mortality non-coral benthos site (Sharp Island). These findings highlight alarming impact extreme on communities underscore importance monitoring bleaching.

Language: Английский

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Picture of Health: Evaluating an accessible method for quantifying coral thermal tolerance using photographic color analysis

Research Square (Research Square), Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 25, 2024

Reef-building corals are increasingly threatened by the warming climate, necessitating development of tools to monitor their responses environmental stress. Furthermore, scalable methods identifying resilient a particular conservation priority. Techniques commonly used quantify severity coral bleaching can be invasive or require specialized instruments, while more widely-accessible visual limited subjectivity. This study evaluates non-invasive, objective, color-based approach for evaluating status symbiosis and compares thermal tolerance results with traditional metrics. Using staghorn Acropora cervicornis as model, acute was assessed across genets, sites, seasons within an active restoration program in Bonaire, Caribbean Netherlands. Quantitative color scores were significantly correlated both metrics also identified similar genetic effects on tolerance. Most importantly, demonstrated high level agreement symbiont chlorophyll retention detecting significant pairwise differences resistance. Variation predictive accuracy method suggest that assessments may effective summer compared winter. Overall findings this provide support analysis reliable cost-effective assessing resilience which readily incorporated into censuses populations, especially efforts.

Language: Английский

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Assessing Acute Thermal Assays as a Rapid Screening Tool for Coral Restoration

Research Square (Research Square), Journal Year: 2023, Volume and Issue: unknown

Published: July 17, 2023

Abstract Escalating environmental threats to coral reefs coincides with global advancements in restoration programs. To improve long-term efficacy, practitioners must consider incorporating genotypes resilient ocean warming and disease while maintaining genetic diversity. Identifying such typically occurs under exposures that mimic natural stressors, but these experiments can be time-consuming, costly, introduce tank effects, hindering scalability for hundreds of nursery used outplanting. Here, we evaluated the efficacy acute Coral Bleaching Automated Stress System (CBASS) against on bleaching response Acropora cervicornis , dominant species Florida’s Reef. Comparing metrics, F v / m chlorophyll, host protein, observed similar responses between heat CBASS treatment 34.3°C, which was also calculated threshold. This suggests potential as a rapid screening tool, 90% exhibiting tolerances. However, variations phenotypes arose from measurement timing experiment accumulation, cautioning generalizations solely based metrics like . These findings hold promise improving determining their relative tolerance interventions.

Language: Английский

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Multiomics data integration, limitations, and prospects to reveal the metabolic activity of the coral holobiont

FEMS Microbiology Ecology, Journal Year: 2024, Volume and Issue: 100(5)

Published: April 10, 2024

Abstract Since their radiation in the Middle Triassic period ∼240 million years ago, stony corals have survived past climate fluctuations and five mass extinctions. Their long-term survival underscores inherent resilience of corals, particularly when considering nutrient-poor marine environments which they thrived. However, coral bleaching has emerged as a global threat to survival, requiring rapid advancements research understand holobiont stress responses allow for interventions before extensive occurs. This review encompasses potential, well limits, multiomics data applications applied holobiont. Synopses how different omics tools been date current restrictions are discussed, addition ways these may be overcome, such recruiting new technology studies, utilizing novel bioinformatics approaches, generally integrating data. Lastly, this presents considerations design studies support lab-to-field marker monitoring systems. Although much mechanism eluded investigation date, multiomic already produced key findings regarding holobiont’s response, potential advance field further.

Language: Английский

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Differential impacts of light on coral phenotypic responses to acute heat stress

Journal of Experimental Marine Biology and Ecology, Journal Year: 2024, Volume and Issue: 581, P. 152057 - 152057

Published: Sept. 28, 2024

Language: Английский

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Groundtruthing assessments of lab-based coral thermal tolerance with large-area imaging

Coral Reefs, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 27, 2024

Language: Английский

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Regulation of cultured coral endosymbiont photophysiology by alternate heat stress protocols

Marine Biology, Journal Year: 2023, Volume and Issue: 171(1)

Published: Dec. 14, 2023

Language: Английский

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