Marine heatwaves are not a dominant driver of change in demersal fishes

Nature, Journal Year: 2023, Volume and Issue: 621(7978), P. 324 - 329

Published: Aug. 30, 2023

Language: Английский

---

The ocean losing its breath under the heatwaves

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: Aug. 9, 2024

The world's oceans are under threat from the prevalence of heatwaves caused by climate change. Despite this, there is a lack understanding regarding their impact on seawater oxygen levels - crucial element in sustaining biological survival. Here, we find that can trigger low-oxygen extreme events, thereby amplifying signal deoxygenation. By utilizing situ observations and state-of-the-art model simulations, provide global assessment relationship between two types events surface ocean (0-10 m). Our results show compelling evidence remarkable surge co-occurrence marine events. Hotspots these concurrent stressors identified study, indicating this intensification more pronounced high-biomass regions than those with relatively low biomass. rise compound primarily attributable to long-term warming induced anthropogenic forcing, tandem natural internal variability modulating spatial distribution. findings suggest losing its breath influence heatwaves, potentially experiencing severe damage previously anticipated.

Language: Английский

---

Winter is coming: Interactions of multiple stressors in winter and implications for the natural world

Global Change Biology, Journal Year: 2023, Volume and Issue: 29(24), P. 6834 - 6845

Published: Sept. 30, 2023

Winter is a key driver of ecological processes in freshwater, marine and terrestrial ecosystems, particularly higher latitudes. Species have evolved various adaptive strategies to cope with food limitations the cold dark wintertime. However, human-induced climate change other anthropogenic stressors are impacting organisms winter unpredictable ways. In this paper, we show that global experiments investigating multiple predominantly been conducted during summer months. effects sometimes differ between seasons, necessitating comprehensive investigations. Here, outline framework for understanding different compared seasons discuss primary mechanisms will alter responses (microbes, animals plants). For instance, while magnitude some can be greater than (e.g. pollutants), others may alleviate natural stress warmer temperatures). These changes immediate, delayed or carry-over on later seasons. Interactions also vary season. We call renewed research direction focusing stressor ecology evolution fully understand, predict, how ecosystems fare under changing winters. argue importance incorporating interactions into risk assessments, management conservation efforts.

Language: Английский

---

Herbivore functions in the hot-seat: Resilience of Acanthurus triostegus to marine heatwaves

PLoS ONE, Journal Year: 2025, Volume and Issue: 20(1), P. e0318410 - e0318410

Published: Jan. 31, 2025

Herbivorous fishes play a crucial role in the conservation of coral reefs threatened by thermal stress ( e . g ., marine heatwaves and long-term ocean warming) helping to maintain coral-dominated state via removal algae. However, as thermally sensitive ectotherms, rising may also pose serious threat these critical ecosystem functions they deliver. Here we evaluate consequences on capacity common herbivorous reef fish Acanthurus triostegus ) control finely filamentous matrices Caulerpa sertularioides C verticillata algae Hawai ʻ i, characterizing in-vivo changes metabolic demands, diurnal foraging rates, activity patterns individual condition laboratory setting during winter (24.0±0.1°C), summer (27.5±0.1°C), at peak representative heatwave, (31.0±0.1°C). Rising temperatures caused significant increases standard rate (from ~135 O 2 kg -1 h 224 heatwave), but not proportion time spent active (~83–96%) or (~2.4 bites min ). Consequently, A gained body mass winter, lost ~0.8% per day heatwave. Given can last for weeks months, results indicate that while continue remove periods stress, their ability many macroalga be limited due precipitous reductions performance. Therefore, addition algal types, sensitivity will need considered successful implementation coral-algal management strategies warmer world.

Language: Английский

---

Coral reef thermal microclimates mapped from the International Space Station

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

Published: Feb. 3, 2025

Abstract Satellite sea surface temperature (SST) is critical for describing marine environments. Traditional SST data, such as those provided by the Group High Resolution Sea Surface Temperature (GHRSST) program, are valuable, but have a relatively coarse spatial resolution mapping coral reef thermal Hence, fine from orbit would be of great utility to research community and speed pathway an increased understanding how, when, where stress afflicts individual reefs. Such data support adaptive management, especially so design protected areas. Flying aboard International Space Station, NASA ECOsystem Spaceborne Thermal Radiometer Experiment on Station (ECOSTRESS) instrument may already fill this niche with 204 times finer than GHRSST. To evaluate ECOSTRESS over environments, we deployed 21 loggers three years across two sites in Red Sea. We compared retrievals both GHRSST resolution, experimental, ECOSTRESS, in-situ logger dataset. While orbital platforms correlated strongly recordings, only its 70-m pixels, could construct microclimate maps capturing dynamic fluctuations experienced our studied contend that represents significant advancement capability monitor heat reefs orbit.

Language: Английский

---

Eat more, often: The capacity of piscivores to meet increased energy demands in warming oceans

The Science of The Total Environment, Journal Year: 2025, Volume and Issue: 973, P. 179105 - 179105

Published: March 18, 2025

Language: Английский

---

EPO Enhances Adaptation to Hypoxic Environment in the Freshwater Teleost (Micropterus salmoides) through the PI3K/AKT Pathway

Environmental Science & Technology, Journal Year: 2025, Volume and Issue: unknown

Published: April 16, 2025

Hypoxia has become one of the most common environmental stress events in life history aquatic organisms due to accelerated global warming. Exploring adaptation mechanisms hypoxic environments is important deepen our understanding toxicology and design breeding programs. In this study, largemouth bass Micropterus salmoides exhibited greater adaptability after 4 weeks intermittent exposure (IHE), with O2 tension for loss equilibrium decreased from 1.17 ± 0.20 0.66 0.10 mg/L. Combined transcriptomics, biochemical detection, immunostaining results revealed that hypoxia-tolerant phenotype driven by IHE was strongly correlated activation erythropoietin (EPO). EPO promoted phosphoinositide-3-kinase (PI3K)/protein kinase B (AKT) signaling alleviate hepatic damage under acute (AHE) selectively regulating expression genes related antioxidant defense, antiapoptosis, cell proliferation, which plays an role adaptation. The inhibition impaired survival environments, but intervention PI3K agonist 740 Y-P reversed process. This novel finding provides insights into exploring how cope challenges hypoxia increasing risks.

Language: Английский

---

Heatwave duration, intensity and timing as drivers of performance in larvae of a marine invertebrate

Scientific Reports, Journal Year: 2025, Volume and Issue: 15(1)

Published: May 7, 2025

Language: Английский

---

Climate‐Driven Warming Disrupts the Symbiosis of Bobtail Squid Euprymna scolopes and the Luminous Bacterium Vibrio fischeri

Global Change Biology, Journal Year: 2025, Volume and Issue: 31(5)

Published: May 1, 2025

ABSTRACT Under the current climate crisis, marine heatwaves (MHW) are expected to intensify and become more frequent in future, leading adverse effects on life. Here, we aimed investigate impact of environmental warming symbiotic relationship between Hawaiian bobtail squid ( Euprymna scolopes ) bioluminescent bacterium Vibrio fischeri . We exposed eggs E. three different temperatures during embryogenesis, namely: (i) 25°C (yearly average), (ii) 27°C (summer maximum) or (iii) 30°C (category IV MHW), followed by a colonisation assay under same conditions. Decreased hatching success reduced developmental time were observed across warmer conditions compared 25°C. Moreover, exposure category MHW led significant decrease survival after 48 h. With increasing temperature, squids required bacteria surrounding seawater for successful colonisation. When colonised, regression light organ's appendages was not dependent but opposite found non‐colonised squids. Furthermore, capacity crypt 3 formation squid's organ, which is crucial enhancing resilience stress, also declined with This study emphasises critical need dynamics microbial symbiosis projected ocean tomorrow.

Language: Английский

---

Prior heatwave exposure improves hypoxia tolerance in a typical freshwater fish species

Comparative Biochemistry and Physiology Part A Molecular & Integrative Physiology, Journal Year: 2025, Volume and Issue: unknown, P. 111803 - 111803

Published: Jan. 1, 2025

Language: Английский

---