The seasonal response of metabolic rate to projected climate change scenarios in aquatic amphipods

Journal of Thermal Biology, Год журнала: 2024, Номер 124, С. 103941 - 103941

Опубликована: Авг. 1, 2024

The responses of organisms to climate change are mediated primarily by its impact on their metabolic rates, which, in turn, drive various biological and ecological processes. Although there have been numerous seminal studies the sensitivity rate temperature, little is empirically known about how this responds seasonal temperature ranges beyond under conservative IPCC scenarios. Here, we measured SMR aquatic amphipod, Gammarus insensibilis, which served as our subject species, with body masses ranging from 0.20 7.74 mg ash free weight. We assessed response across nine levels 12 30.2 °C. These temperatures match norms, an incremental increase 0.6-1.2 °C above each baseline, projected for years 2040 2100 modest Overall, findings showed that effect varies mass, indicated a negative size-temperature interaction, larger conspecifics exhibiting less changes than smaller ones. From cold warm season, increased average 14%

Язык: Английский

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Metabolic rate and foraging behaviour: a mechanistic link across body size and temperature gradients

Oikos, Год журнала: 2024, Номер unknown

Опубликована: Окт. 16, 2024

The mechanistic link between metabolic rate and foraging behaviour is a crucial aspect of several energy‐based ecological theories. Despite its importance to ecology however, it remains unclear whether how energy requirements behavioural patterns are mechanistically connected. Here we aimed assess modes behaviour, including cumulative space use, patch selection time spent in an experimental resource‐patchy environment, related forager's standard (SMR) main determinants, i.e. body mass temperature. We tested the individual rates model organism, amphipod Gammarus insensibilis , across range masses temperatures. demonstrated quantitatively that temperature exert major influence on decisions use via their effects marginal value energy. Individual was found scale allometrically with exponentially temperature, giving‐up falling as increased. In response warmer temperatures, specimens adaptively intensified effort explored larger spaces offset elevated SMR. Our results showed SMR explained more variation than combined, had greater predictive power for patterns. Furthermore, regarding choice partitioning were strongly mass‐and‐temperature‐adjusted (residual), which component phenotype. Individuals higher M–T adjusted initially preferred most profitable and, progressed, abandoned earlier others. These demonstrate intimately associated variations rate, phenotypic or due size combined. This, turn, sheds light higher‐order processes.

Язык: Английский

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Home range sizes correlate positively with resting metabolic rate in bush Karoo rats (Otomys unisulcatus)

Mammal Research, Год журнала: 2025, Номер unknown

Опубликована: Апрель 9, 2025

Язык: Английский

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Gammarus aequicauda (Аmphipoda) as a promising target for hypersaline aquaculture: New data and potential to serve as an aquafeed

Aquaculture, Год журнала: 2024, Номер unknown, С. 741617 - 741617

Опубликована: Сен. 1, 2024

Язык: Английский

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