Seasonally variable thermal performance curves prevent adverse effects of heatwaves

Journal of Animal Ecology, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 11, 2024

Abstract 1. Differential vulnerability to heatwaves may affect community dynamics in a changing climate. In temperate regions, this depends on the interactions between seasonal temperature fluctuations and capacity rapidly shift thermal performance curves. 2. Here we investigate how these of two ecologically important copepod congeners, Acartia tonsa A. hudsonica , different durations. Using combination field observations simulated laboratory heatwave experiments, uncover strong variation curves but not . This translated species‐specific patterns heatwaves, with increased 3. By reducing parental stress during curve shifts likely reduced indirect, transgenerational effects events offspring 4. Our results illustrate levels will population persistence climate

Language: Английский

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Despite plasticity, heatwaves are costly for a coral reef fish

Scientific Reports, Journal Year: 2024, Volume and Issue: 14(1)

Published: June 10, 2024

Climate change is intensifying extreme weather events, including marine heatwaves, which are prolonged periods of anomalously high sea surface temperature that pose a novel threat to aquatic animals. Tropical animals may be especially vulnerable heatwaves because they adapted narrow range. If these cannot acclimate the heat could impair their behavior and fitness. Here, we investigated how heatwave conditions affected performance thermal tolerance tropical predatory fish, arceye hawkfish (Paracirrhites arcatus), across two seasons in Moorea, French Polynesia. We found fish's daily activities, recovery from burst swimming digestion, were more energetically costly fish exposed both seasons, while aerobic capacity remained same. Given constrained energy budget, rising costs associated with warming impact prioritize activities. Additionally, hotter temperatures exhibited cardiac plasticity by increasing maximum heart rate but still operating within few degrees limits. With frequent intense hawkfish, other fishes must rapidly acclimate, or suffer physiological consequences alter role ecosystem.

Language: Английский

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Seasonally variable thermal performance curves prevent adverse effects of heatwaves

bioRxiv (Cold Spring Harbor Laboratory), Journal Year: 2023, Volume and Issue: unknown

Published: May 12, 2023

Abstract The increasing frequency and intensity of heatwaves may represent a significant challenge for predicting vulnerability populations in warming ocean. direct impacts on depend the relative position environmental temperatures to thermal performance curve optima. If curves are static, effects therefore change seasonally over annual temperature cycle. However, these seasonal changes be dampened by corresponding variation which, organisms with relatively short generation times, driven phenotypic plasticity as well genetic differentiation. Here we investigate timing duration ecologically important copepod congeners Acartia tonsa hudsonica , test hypotheses that 1) will reduce overall population heatwaves, 2) TPCs prevent negative transgenerational heatwave. We characterized several fitness-related traits. These experiments uncovered strong indicate this buffers against simulated heatwaves. also quantified both trans-generational different copepods collected at various times throughout season using heatwave experiments. There was no consistent pattern parental exposure which reduces stress offspring performance. Our results show likely play an role limiting adverse populations.

Language: Английский

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Introduction to meteorology, weather, and climate

Elsevier eBooks, Journal Year: 2024, Volume and Issue: unknown, P. 303 - 329

Published: Jan. 1, 2024

Language: Английский

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The effects of marine heatwaves on a coral reef snapper: insights into aerobic and anaerobic physiology and recovery

Conservation Physiology, Journal Year: 2024, Volume and Issue: 12(1)

Published: Jan. 1, 2024

Abstract Marine heatwaves (MHWs) are increasing in frequency and intensity. Coral reefs particularly susceptible to MHWs, which cause mass coral bleaching mortality. However, little is known about how MHWs affect reef fishes. Here, we investigated the physiology of a mesopredator, Lutjanus carponotatus. Specifically, exposed mature adults two different MHW intensities, +1°C (29.5°C) + 2°C (30.5°C) measured physiological performance at 2 4 weeks exposure post-exposure. At these time points, oxygen consumption rest after simulated fishing capture event, recovery time, excess post-exercise (EPOC) associated biochemical markers blood (baseline lactate, post-capture glucose, haemoglobin levels haematocrit proportion). We found that conditions increased resting (+1°C = 23%, +2°C 37%), 62%, 77%), EPOC 50%, 68%), baseline lactate 27%, 28%), 109%) 13%, 28%). This pattern was maintained except for reduced −37%, 27%). In combination, results suggest greater reliance on anaerobic glycolysis maintain homeostasis conditions. post-exposure, when compared control fish, 25%, 26%), rate (+2°C 38%) still higher 15%, 21%). These show have direct demands adult snapper ecologically relevant residual effects can last least post-MHW; however, individuals appear recover from negative experienced during MHW. provides new insight into

Language: Английский

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When the Going Gets Tough, the Females Get Going: Sex‐Specific Physiological Responses to Simultaneous Exposure to Hypoxia and Marine Heatwave Events in a Ubiquitous Copepod

Global Change Biology, Journal Year: 2024, Volume and Issue: 30(10)

Published: Oct. 1, 2024

ABSTRACT The existence of sex‐specific differences in phenotypic traits is widely recognized. Yet they are often ignored studies looking at the impact global changes on marine organisms, particularly within context combined drivers that known to elicit complex interactions. We tested physiological responses cosmopolitan and ecologically important copepod Acartia tonsa exposed hypoxia heatwave (MHW) conditions, both which individually strongly affect ectotherms. Females males were acutely for 5 days a combination either control (18°C) or high temperature mimicking MHW (25°C), normoxia (100% O 2 sat.) mild (35% sat.). Life‐history traits, as well survival measured. had overall higher thermal tolerance levels responded differently than when change investigated. also showed lower metabolic sensitivity compared males. Additionally, exerted dominant effect investigated, causing rate 25°C. However, egg production rates appeared unaffected by conditions. Our results MHWs could copepods' survival, exposure an interactive only CT max , vulnerability these have major implications population dynamics. highlight importance considering females rapid environmental improve implementation climate‐smart conservation approaches.

Language: Английский

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