Predictive models for the selection of thermally tolerant corals based on offspring survival

Nature Communications, Journal Year: 2022, Volume and Issue: 13(1)

Published: March 29, 2022

Abstract Finding coral reefs resilient to climate warming is challenging given the large spatial scale of reef ecosystems. Methods are needed predict location corals with heritable tolerance high temperatures. Here, we combine Great Barrier Reef-scale remote sensing breeding experiments that estimate larval and juvenile survival under exposure Using reproductive collected from northern central Reef, develop forecasting models locate harbouring capable producing offspring increased heat an additional 3.4° heating weeks (~3 °C). Our findings hundreds (~7.5%) may be home have heat-tolerance in habitats daily annual temperature ranges historically variable stress. The locations identified represent targets for protection consideration as a source use restoration degraded their potential resist change impacts repopulate tolerant offspring.

Language: Английский

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Intrapopulation adaptive variance supports thermal tolerance in a reef-building coral

Communications Biology, Journal Year: 2022, Volume and Issue: 5(1)

Published: May 19, 2022

Abstract Coral holobionts are multi-species assemblages, which adds significant complexity to genotype-phenotype connections underlying ecologically important traits like coral bleaching. Small scale heterogeneity in bleaching is ubiquitous the absence of strong environmental gradients, provides adaptive variance needed for long-term persistence reefs. We used RAD-seq, qPCR and LC-MS/MS metabolomics characterize host genomic variation, symbiont community biochemical correlates two phenotypes vertically transmitting Montipora capitata . Phenotype was driven by symbiosis state genetic variance. documented 5 gene ontologies that were significantly associated with both binary phenotype composition, representing functions confer a via host-symbiont interactions. bred these corals show communities broadly conserved bulk-crosses, resulting higher survivorship under temperature stress juveniles, but not larvae, from tolerant parents. Using select re-sequence approach, we document numerous selected heat stress, some (cell signaling, antioxidant activity, pH regulation) have unique selection dynamics larvae thermally These data may an advantage climate change if interact influence phenotype.

Language: Английский

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Finding genes and pathways that underlie coral adaptation

Trends in Genetics, Journal Year: 2024, Volume and Issue: 40(3), P. 213 - 227

Published: Feb. 6, 2024

Language: Английский

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Exploring microbiome engineering as a strategy for improved thermal tolerance inExaiptasia diaphana

Journal of Applied Microbiology, Journal Year: 2022, Volume and Issue: 132(4), P. 2940 - 2956

Published: Feb. 1, 2022

Fourteen percent of all living coral, equivalent to more than the coral on Great Barrier Reef, has died in past decade as a result climate change-driven bleaching. Inspired by 'oxidative stress theory bleaching', we investigated whether bacterial consortium designed scavenge free radicals could integrate into host microbiome and improve thermal tolerance model, Exaiptasia diaphana.E. diaphana anemones were inoculated with high radical scavenging (FRS) bacteria, congeneric low FRS or sterile seawater control, then exposed elevated temperature. Increases relative abundance Labrenzia during first 2 weeks following last inoculation provided evidence for temporary inoculum integration E. microbiome. Initial uptake other members was inconsistent, these bacteria did not persist either diaphana's over time. Given their non-integration microbiome, ability mitigate be assessed. Importantly, there no physiological impacts (negative positive) inoculations holobiont.The introduced maintained anemone time, thus, protective effect is unknown. Achieving long-term cnidarian microbiomes remains research priority.Microbiome engineering strategies bleaching may assist reefs persistence until change been curbed. This study provides insights that will inform manipulation approaches mitigation research.

Language: Английский

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Growth and survival among Hawaiian corals outplanted from tanks to an ocean nursery are driven by individual genotype and species differences rather than preconditioning to thermal stress

PeerJ, Journal Year: 2022, Volume and Issue: 10, P. e13112 - e13112

Published: March 23, 2022

The drastic decline in coral coverage has stimulated an interest reef restoration, and various iterations of nurseries have been used to augment restoration strategies. Here we examine the growth two species Hawaiian Montipora that were maintained mesocosms under either ambient or warmed annual bleaching conditions for consecutive years prior outplanting determine whether preconditioning aided efforts. Using trees create a nearby ocean nursery, examined whether: (1) previous ex situ mesocosm would mirror tree nursery growth; (2) thermal stress-hardening predict future success during natural warming events corals moved from tanks trees. For capitata , found variation was explained primarily by genotype; rates similar those irrespective preconditioning. Variation M. flabellata growth, however, both genotype culture method such individual colony grew well did not necessarily perform as on species, exposure elevated temperatures provided no benefit survival event compared grown temperatures. Overall, performed better with higher net lower mortality, subject less predation than . Our results show little additional cost time these because it is unlikely aid resilience events. These also suggest selecting based long-term performance may be more effective optimal outcomes but should weighed against other factors, morphology, method, location, characteristics.

Language: Английский

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The role and risks of selective adaptation in extreme coral habitats

Nature Communications, Journal Year: 2023, Volume and Issue: 14(1)

Published: July 28, 2023

Abstract The alarming rate of climate change demands new management strategies to protect coral reefs. Environments such as mangrove lagoons, characterized by extreme variations in multiple abiotic factors, are viewed potential sources stress-tolerant corals for assisted evolution and propagation. However, biological trade-offs adaptation extremes poorly known. Here, we investigate the reef-building Porites lutea thriving both reef sites show that stress-tolerance comes with compromises genetic energetic mechanisms skeletal characteristics. We observe reduced diversity gene expression variability corals, a disadvantage under future harsher selective pressure. find density, thickness higher porosity skeletons from mangroves, symptoms metabolic energy redirection stress response functions. These findings demonstrate need caution when utilizing human interventions, current survival may compromise competitive fitness.

Language: Английский

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How Can Genomics Help or Hinder Wildlife Conservation?

Annual Review of Animal Biosciences, Journal Year: 2023, Volume and Issue: 12(1), P. 45 - 68

Published: Oct. 3, 2023

Genomic data are becoming increasingly affordable and easy to collect, new tools for their analysis appearing rapidly. Conservation biologists interested in using this information assist management planning but typically limited financially by the lack of genomic resources available non-model taxa. It is therefore important be aware pitfalls as well benefits applying approaches. Here, we highlight recent methods aimed at standardizing population assessments genetic variation, inbreeding, forms load that help identify past ongoing patterns interchange between populations, including those subjected disturbance. We emphasize challenges some these need adequate bioinformatic support. also consider promises approaches understand adaptive changes natural populations predict future capacity.

Language: Английский

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An epigenetic toolbox for conservation biologists

Evolutionary Applications, Journal Year: 2024, Volume and Issue: 17(6)

Published: June 1, 2024

Abstract Ongoing climatic shifts and increasing anthropogenic pressures demand an efficient delineation of conservation units accurate predictions populations' resilience adaptive potential. Molecular tools involving DNA sequencing are nowadays routinely used for these purposes. Yet, most the existing focusing on sequence‐level information have shortcomings in detecting signals short‐term ecological relevance. Epigenetic modifications carry valuable to better link individuals, populations, species their environment. Here, we discuss a series epigenetic monitoring that can be directly applied various contexts, complementing already molecular frameworks. Focusing sequence‐based methods (e.g. methylation, which applications readily available), demonstrate how (a) identification epi‐biomarkers associated with age or infection facilitate determination individual's health status wild populations; (b) whole epigenome analyses identify signatures selection linked environmental conditions estimating potential (c) epi‐eDNA (epigenetic DNA), epigenetic‐based tool, presents non‐invasive sampling method monitor biological beyond mere presence individuals. Overall, our framework refines strategies, ensuring comprehensive understanding species' persistence ecologically relevant timescales.

Language: Английский

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Genomic signatures of thermal adaptation are associated with clinal shifts of life history in a broadly distributed frog

Journal of Animal Ecology, Journal Year: 2021, Volume and Issue: 91(6), P. 1222 - 1238

Published: May 28, 2021

Abstract Temperature is a critical driver of ectotherm life‐history strategies, whereby warmer environment associated with increased growth, reduced longevity and accelerated senescence. Increasing evidence indicates that thermal adaptation may underlie such shifts in wild populations. Single nucleotide polymorphisms (SNPs) copy number variants (CNVs) can help uncover the molecular mechanisms temperature‐driven variation However, our understanding these still limited, which reduces ability to predict response non‐model ectotherms global temperature change. In this study, we examined potential role clinal traits (i.e. life span, senescence rate recruitment) Columbia spotted frog Rana luteiventris along broad gradient western United States. We took advantage extensive capture–recapture datasets 20,033 marked individuals from eight populations surveyed annually for 14–18 years examine how mean annual precipitation influenced demographic parameters adult survival, rate, recruitment population growth). After showing was main climatic predictor influencing demography, used RAD‐seq data (50,829 SNPs 6,599 putative CNVs) generated 352 31 breeding sites identify genomic signatures adaptation. Our results showed negatively survival reproductive span positively rate. By contrast, temperature, promoting long‐term viability most These temperature‐dependent changes were strong identified 148 SNP candidates including three located within protein‐coding genes regulating resistance cold hypoxia, immunity reproduction ranids. also 39 CNV (including 38 transposable elements) normalized read depth temperature. study both structural are could eventually be found play functional strategies R. . highlight different sources environmental context warming.

Language: Английский

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Palau’s warmest reefs harbor thermally tolerant corals that thrive across different habitats

Communications Biology, Journal Year: 2022, Volume and Issue: 5(1)

Published: Dec. 21, 2022

Abstract Ocean warming is killing corals, but heat-tolerant populations exist; if protected, they could replenish affected reefs naturally or through restoration. Palau’s Rock Islands experience consistently higher temperatures and extreme heatwaves, yet their diverse coral communities bleach less than those on cooler outer reefs. Here, we combined genetic analyses, bleaching histories growth rates of Porites cf. lobata colonies to identify thermally tolerant genotypes, map distribution, investigate potential trade-offs. We identified four lineages P . On reefs, a sensitive lineage dominates. The harbor two with enhanced thermal tolerance; one which shows no consistent trade-off also occurs several This suggests that the provide larvae neighboring areas. Finding protecting such sources thermally-tolerant corals key reef survival under 21 st century climate change.

Language: Английский

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