Genomics‐Informed Range Predictions Under Global Warming Reveal Reduced Adaptive Diversity Whilst Buffering Range Shifts for a Marine Snail

Global Change Biology, Journal Year: 2024, Volume and Issue: 30(11)

Published: Nov. 1, 2024

Understanding the genetic basis of local adaptation in thermal performance is useful for predicting species distribution shifts under anthropogenic climate change. Many are distributed across multiple biogeographic regions, and uniquely adapted populations each region may respond to future ocean warming with distinct changes. In present study, we investigated phylogeographic patterns, sensitivity, differentiation intertidal snail Littorina brevicula along China's coast. Whole-genome sequencing results based on a newly assembled chromosome-level genome revealed two lineages, north-south divergence that linked environment. Within lineage, individuals could be further subdivided into subgroups differ at key genomic loci underpinning differences upper heat tolerance. Heat stress drives adaptive levels organization, from individual level. Taking account diversity associated variation tolerance, physiological model (pSDM) was applied predict distributions different response Both northern southern lineages were predicted experience declines habitat suitability 4°C scenario, genotypic subset snails lineage even driven extinction. These findings illustrate when species' range maintained, it can nonetheless significant decrease as result The integrated approach presented here, which considered both level within biogeographical context, provided new insights how marine global warming.

Language: Английский

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Mechanistic origins of temperature scaling in the early embryonic cell cycle

bioRxiv (Cold Spring Harbor Laboratory), Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 24, 2024

Temperature profoundly impacts organismal physiology and ecological dynamics, particularly affecting ectothermic species making them especially vulnerable to climate changes. Although complex physiological processes usually involve dozens of enzymes, empirically it is found that the rates these often obey Arrhenius equation, which was originally proposed for individual chemical reactions. Here we have examined temperature scaling early embryonic cell cycle, with goal understanding why equation approximately holds breaks down at extremes. Using experimental data from Xenopus laevis, tropicalis , Danio rerio plus published Caenorhabditis elegans, briggsae Drosophila melanogaster find apparent activation energies ( E a values) cycle diverse ectotherms are all similar, 75 ± 7 kJ/mol (mean std.dev., n = 6), corresponds Q 10 value 20°C 2.8 0.2 6). computational models, approximate deviations high low temperatures can be accounted by biphasic in critical components oscillator circuit, imbalances values different partially rate-determining or combination both. Experimental studies cycling extracts indicate both mechanisms contribute general temperature, vitro regulators confirm there fact substantial imbalance their values. These findings provide mechanistic insights into dynamic interplay between biochemical processes, biological systems fail extreme temperatures.

Language: Английский

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Functional and regulatory diversification of circadian rhythmperiodgenes during the evolution of vertebrates

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

Published: March 9, 2023

Abstract The Period genes ( Per ) play essential roles in modulating the molecular circadian clock timing a broad range of species, which regulates physiological and cellular through transcription-translation feedback loop. While gene paralogs are widely observed among vertebrates, evolutionary history functional diversification across vertebrates not well known. In this study, we comprehensively investigated evolution genes, including de novo binding motif discovery by comparative genomics. We also determined lineage-specific transcriptome landscape tissues developmental stages phenotypic effects public RNA-seq data sets model species. multiple gain loss events though no simple association was between ecological factors numbers each Among salmonid fish per3 has been lost majority, whereas those retaining exhibit signature relaxed selective constraint but rather intensified selection. adaptive CRY-binding region Per1 Per3 , modulates rhythm. discovered putative regulatory sequences, lineage-specific, suggesting that these cis-regulatory elements may have evolved rapidly divergently different lineages. Collectively, our findings revealed their fine-tuned contribution to plastic precise regulation rhythms various vertebrate taxa. Significance rhythm animals. three types vertebrates. As result, rapid sub-functionalization especially signatures protein-binding region, plays crucial role regulating rhythms. This underscores biological clock’s precision adaptability

Language: Английский

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Activity–Rest Circadian Rhythm of the Pearly Razorfish in Its Natural Habitat, before and during Its Mating

Biology, Journal Year: 2023, Volume and Issue: 12(6), P. 810 - 810

Published: June 2, 2023

Recent technological advances in marine biotelemetry have demonstrated that fish species perform activity-rest rhythms relevant ecological and evolutionary consequences. The main objective of the present report is to study circadian rhythm pearly razorfish, Xyrichtys novacula its own habitat, before during reproduction season using a novel system. This small-bodied inhabits most shallow soft habitats temperate areas has high interest for commercial recreational fisheries. activity free-living was monitored by means high-resolution acoustic tracking motor one-minute intervals. obtained data allowed definition terms classical non-parametric values: interdaily stability (IS), intradaily variability (IV), relative amplitude (RA), average most-active period consecutive 10 h (M10), least-active 5 (L5). We observed well-marked rhythm, with little fragmentation good synchrony environmental cycle light-darkness, regardless sex studied. However, found be slightly more desynchronized fragmented because variations photoperiod. In addition, we males much higher than females (p < 0.001), probably due peculiar behavior defending harems they lead. Finally, time at which began earlier it presumably same fact, as differences or individual heterogeneity this awakening are considered an independent axis fish's personality. Our work novel, one first studies circadian-related descriptors locomotory facilitated approaches.

Language: Английский

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Brook Char (Salvelinus Fontinalis) Show Temperature-Dependent Exercise Recovery Yet Do Not Exhibit Behavioral Thermoregulation Following Exercise

Published: Jan. 1, 2023

The relationship between behavioral thermoregulation and physiological recovery following exhaustive exercise is not well understood. Behavioral could be beneficial for recovery; example, selection of cooler temperatures reduce maintenance metabolic cost to preserve aerobic scope cost, or warmer accelerate metabolites. While post-exercise has been observed in lizards frogs, little known about its importance fish. We examined the influence temperature on rate, thermal preference, metabolite concentrations juvenile brook char (Salvelinus fontinalis). Fish were acclimated exercised at 15°C, then recovered either 15°C 10°C while their rate was measured via respirometry. Metabolite fish after under one three treatments (to simulate various scenarios): (i) 6 h (ii) 10°C, (iii) 3 followed by 15°C. Thermal preference quantified using a static system (15°C vs. 10°C). Metabolic rates returned resting faster compared with although there tradeoff delayed recovery. Specifically, plasma osmolality, lactate, muscle lactate remained elevated entire period recovering whereas these parameters levels from other two groups. Regardless, did exhibit clear (i.e., overall consistently prefer temperature) prioritize process. advantage may trade off against temperatures, lessening usefulness as strategy

Language: Английский

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