Resistance of Posidonia oceanica seedlings to warming: Investigating the importance of the lag-phase duration between two heat events to thermo-priming

Marine Pollution Bulletin, Journal Year: 2024, Volume and Issue: 204, P. 116515 - 116515

Published: May 25, 2024

The increase of marine heat waves (MHWs) occurrence is exacerbated in Mediterranean Sea and temperature resilience-enhancing strategies on key species, such as the seagrass Posidonia oceanica, need to be investigated. "Priming" describes a stimulus that prepares an organism for improved response upcoming environmental changes by triggering memory remains during lag-phase. aim this study, conducted Sardinia (Italy), was investigate whether development thermo-primed P. oceanica seedlings affected field simulated MHW depending duration After thermo-priming stimulus, had 0, 7 or 14 days lag-phase after that, each group, half experienced (the other served controls). Some did not experience either priming Results show any evidence triggered but they highlighted importance acclimation phase before highest temperature: gradual higher number leaves shorter leaf necrosis length compared between two events. Regardless MHWs slowed down root length. Considering fluctuations, testing different intensities necessary provide information about adaptive success species.

Language: Английский

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The influence of environmental history on the performance of Acropora cervicornis corals across a spatiotemporal gradient

The Science of The Total Environment, Journal Year: 2025, Volume and Issue: 977, P. 179385 - 179385

Published: April 14, 2025

Language: Английский

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Different thermal regimes and susceptibility to herbivory do not constrain seagrass seedling restoration

Marine Environmental Research, Journal Year: 2024, Volume and Issue: 204, P. 106918 - 106918

Published: Dec. 19, 2024

Language: Английский

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Movement Ecology of a Coastal Foundation Seagrass Species: Insights From Genetic Data and Oceanographic Modelling

Diversity and Distributions, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 5, 2024

ABSTRACT Aim Seed dispersal plays a key role in shaping the distribution and genetic complexity of seagrass populations affects their resilience capacity under disturbance. The endemic Posidonia oceanica is component Mediterranean coastal ecosystems, but knowledge about movement ecology this species limited, especially regarding seed pathways potential. Location Western coast Sicily (central Mediterranean). Methods Beach‐cast fruits P. were collected from nine localities along Sicily, with adult shoots eight putative donor meadows. We determined pair‐wise differentiation between established meadows cohorts. Genetic assignment tests used to infer most likely meadow origin individual seeds complemented forward backward Lagrangian simulations dispersal. Results A significant was found pools most‐likely origin. confirmed that same cohort originated multiple emphasised presence long‐distance‐dispersal (LDD) events (up hundreds km). connectivity appeared be greater than predicted by oceanographic simulations, which may reflect longer temporal scales on gene flow shaped, contrast contemporary patterns. highlighted physically capable dispersing beyond study area north Tunisian could source propagules for studied. Main Conclusions Our represents step understanding guide meadows' conservation restoration actions. findings are broader context outside research basis similar studies other regions, considering increasing number fruiting recorded across associated ocean warming.

Language: Английский

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Thermo-priming triggers species-specific physiological and transcriptome responses in Mediterranean seagrasses

Plant Physiology and Biochemistry, Journal Year: 2024, Volume and Issue: 210, P. 108614 - 108614

Published: April 7, 2024

Heat priming improves plants tolerance to a recurring heat stress event. The underlying molecular mechanisms of are largely unknown in seagrasses. Here, ad hoc mesocosm experiments were conducted with two Mediterranean seagrass species, Posidonia oceanica and Cymodocea nodosa. Plants first exposed heat-priming, followed by heat-triggering A comprehensive assessment plant response across different levels biological organization was performed at the end triggering Morphological physiological results showed an improved heat-primed P. while C. nodosa both heat- non-primed enhanced their growth rates As resulting from whole transcriptome sequencing, functions related several cellular compartments processes involved warming plants, limited group processes. Our suggest that seagrasses acquire primed state during event, eventually gives ability induce more energy-effective when thermal event recurs. Different species may differ perform after priming. This study provides pioneer insights into emerging topic benefit future studies field.

Language: Английский

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Tannins and copper sulphate as antimicrobial agents to prevent contamination of Posidonia oceanica seedling culture for restoration purposes

Frontiers in Plant Science, Journal Year: 2024, Volume and Issue: 15

Published: Nov. 25, 2024

Seed-based restoration methods are increasingly recognized as a relevant tool contributing to halt and reverse the loss of seagrass meadows while providing genetic evolutionary benefit for conservation these habitats.

Language: Английский

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