Coral long-term recovery after bleaching: implications for sexual reproduction and physiology.

bioRxiv (Cold Spring Harbor Laboratory), Год журнала: 2024, Номер unknown

Опубликована: Апрель 13, 2024

ABSTRACT This study examined the long-term impacts of coral bleaching on reproduction and physiology Montipora capitata , a dominant reef-building in Hawaiʻi. We monitored bleached non-bleached colonies during after natural event 2014 analyzed reproductive traits transcriptomic signatures eight months later. Our shows that successfully produced gametes. Colonies had smaller oocytes, development was slower than did not bleach. Corals with different vulnerabilities to exhibited distinct responses event. Those more prone showed suppression transcripts associated sperm motility, calcification, immunity. found between fringing patch reefs, suggesting local adaptation and/or acclimatization. To conserve reefs better understand how they will be affected by future heat stress, we need track which survive examine their physiological processes are impacted short- long-term. is critical as consecutive events become frequent, corals have less time recover. provides valuable molecular data can used for conservation management purposes. information help us identify signs vulnerability resilience bleaching, project affect reproduction, determine most at risk, assess sites likely compromised.

Язык: Английский

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Host–symbiont transcriptomic changes during natural bleaching and recovery in the leaf coral Pavona decussata

The Science of The Total Environment, Год журнала: 2021, Номер 806, С. 150656 - 150656

Опубликована: Сен. 28, 2021

Язык: Английский

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Rapid shifts in thermal reaction norms and tolerance of brooded coral larvae following parental heat acclimation

Molecular Ecology, Год журнала: 2022, Номер 32(5), С. 1098 - 1116

Опубликована: Дек. 18, 2022

Abstract Thermal priming of reef corals can enhance their heat tolerance; however, the legacy effects stress during parental brooding on larval resilience remain understudied. This study investigated whether preconditioning adult coral Pocillopora damicornis to high temperatures (29°C and 32°C) could better prepare larvae for stress. Results showed that heat‐acclimated adults brooded with reduced symbiont density shifted thermal performance curves. Reciprocal transplant experiments demonstrated higher bleaching resistance photosynthetic autotrophic in heat‐exposed from acclimated compared unacclimated adults. RNA‐seq revealed strong cellular responses have been effective rescuing host cells stress, as evidenced by widespread upregulation genes involved cell cycle mitosis. For symbionts, a molecular coordination between light harvesting, photoprotection carbon fixation was detected adults, which may help optimize activity yield under temperature. Furthermore, acclimation led opposing regulations catabolic anabolic pathways favoured nutrient translocation thus functional symbiosis. Notwithstanding, improved tolerance paralleled light‐enhanced dark respiration, indicating metabolic depression energy saving. Our findings suggest rapidly shift provide integrated physiological evidence this adaptive plasticity, increase climate resilience. However, be maladaptive long‐term organismal performance, highlighting importance curbing emissions protect corals.

Язык: Английский

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Gene expression associated with disease resistance and long-term growth in a reef-building coral

Royal Society Open Science, Год журнала: 2021, Номер 8(4)

Опубликована: Апрель 1, 2021

Rampant coral disease, exacerbated by climate change and other anthropogenic stressors, threatens reefs worldwide, especially in the Caribbean. Physically isolated yet genetically connected such as Flower Garden Banks National Marine Sanctuary (FGBNMS) may serve potential refugia for degraded Caribbean reefs. However, little is known about mechanisms trade-offs of pathogen resistance reef-building corals. Here, we measure Montastraea cavernosa from FGBNMS. We identified individual colonies that demonstrated or susceptibility to Vibrio spp. a controlled laboratory environment. Long-term growth patterns suggest no trade-off between disease calcification. Predictive (pre-exposure) gene expression highlights subtle differences resistant susceptible genets, encouraging future studies investigate associations replicative age immune cell populations. associated with long-term underscores role transmembrane proteins involved adhesion cell–cell interactions, contributing growing body knowledge surrounding genes influence calcification Together these results demonstrate genets sanctuaries FGBNMS can withstand challenges potentially aid restoration efforts Furthermore, signatures help inform strategic assessment health parameters.

Язык: Английский

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Coral larvae suppress heat stress response during the onset of symbiosis decreasing their odds of survival

Molecular Ecology, Год журнала: 2022, Номер 31(22), С. 5813 - 5830

Опубликована: Сен. 28, 2022

The endosymbiosis between most corals and their photosynthetic dinoflagellate partners begins early in the host life history, when are larvae or juvenile polyps. capacity of coral to buffer climate-induced stress while process symbiont acquisition could come with physiological trade-offs that alter behaviour, development, settlement survivorship. Here we examined joint effects thermal symbiosis onset on colonization dynamics, survival, metamorphosis gene expression Acropora digitifera larvae. We found decreased hosts by 50% density 98.5% over 2 weeks. Temperature also influenced larval survival an additive manner, where colonized fared worse prematurely metamorphosed more often than noncolonized under stress. Transcriptomic responses treatments were largely independent, interaction these revealed contrasting profiles genes function response, immunity, inflammation cell cycle regulation. combined treatment either cancelled lowered magnitude heat-stress responsive presence symbionts, revealing a cost acquiring symbionts at stage elevated temperatures. In addition, immune suppression, hallmark ambient temperature, turned activation heat Thus, integrating physical environment biotic pressures mediate presettlement event corals, our results suggest may hinder recruitment projected climate scenarios.

Язык: Английский

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