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Article Abstract
In an ocean that is rapidly warming and losing oxygen, accurate forecasting of species' responses must consider how this environmental change affects fundamental aspects of their physiology. Here, we develop an absolute metabolic index (Φ) that quantifies how ocean temperature, dissolved oxygen and organismal mass interact to constrain the total oxygen budget an organism can use to fuel sustainable levels of aerobic metabolism. We calibrate species-specific parameters of Φ with physiological measurements for red abalone (Haliotis rufescens) and purple urchin (Strongylocentrotus purpuratus). Φ models highlight that the temperature where oxygen supply is greatest shifts cooler when water loses oxygen or organisms grow larger, providing a mechanistic explanation for observed thermal preference patterns. Viable habitat forecasts are disproportionally deleterious for red abalone, revealing how species-specific physiologies modulate the intensity of a common climate signal, captured in the newly developed Φ framework.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10300008 | PMC |
| http://dx.doi.org/10.1038/s41467-023-39438-w | DOI Listing |
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Article Synopsis
- Awareness is growing about the threats to marine invertebrates like abalones, which are vulnerable due to slow growth and dense population needed for reproduction, compounded by fishing pressures and climate change.
- An IUCN Red List assessment revealed that 71.43% of commercially fished abalone species are classified as threatened, compared to only 15.15% of unexploited species, highlighting the severe impact of fishing practices.
- The North American Pacific coast shows the highest concentration of threatened abalone species, while areas like South Africa and Australia face issues with poaching and mass mortalities, prompting measures like ranching and stock enhancement to address these challenges.