Thermal bottlenecks in the life cycle define climate vulnerability of fish

Science, Journal Year: 2020, Volume and Issue: 369(6499), P. 65 - 70

Published: July 2, 2020

Some cope better than others Increasingly, research is revealing how organisms may, or may not, adapt to a changing climate. Understanding the limitations placed by species's physiology can help determine whether it has an immediate potential deal with rapid change. Many studies have looked at physiological tolerance climate change in fishes, results indicating range of responses. Dahlke et al. conducted meta-analysis explore life stage influence ability tolerate temperature (see Perspective Sunday). They found that embryos and breeding adult fishes are much more susceptible those other stages this factor must therefore be considered evaluations susceptibility. Science , issue p. 65 ; see also 35

Language: Английский

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Threats of global warming to the world’s freshwater fishes

Nature Communications, Journal Year: 2021, Volume and Issue: 12(1)

Published: March 15, 2021

Abstract Climate change poses a significant threat to global biodiversity, but freshwater fishes have been largely ignored in climate assessments. Here, we assess threats of future flow and water temperature extremes ~11,500 riverine fish species. In 3.2 °C warmer world (no further emission cuts after current governments’ pledges for 2030), 36% the species over half their present-day geographic range exposed climatic beyond levels. Threats are largest tropical sub-arid regions increases maximum more threatening than changes extremes. comparison, 9% projected threatened 2 world, which reduces 4% if warming is limited 1.5 °C. Our results highlight need intensify (inter)national commitments limit biodiversity be safeguarded.

Language: Английский

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Phylogenetic Classification of Living and Fossil Ray-Finned Fishes (Actinopterygii)

Bulletin of the Peabody Museum of Natural History, Journal Year: 2024, Volume and Issue: 65(1)

Published: April 18, 2024

Classification of the tremendous diversity ray-finned fishes (Actinopterygii) began with designation taxonomic groups on basis morphological similarity. Starting in late 1960s phylogenetics became for classification Actinopterygii but failed to resolve many relationships, particularly among lineages within hyperdiverse Percomorpha. The introduction molecular led a dramatic reconfiguration actinopterygian phylogeny. Refined phylogenetic resolution afforded by studies revealed an uneven lineages, resulting proliferation redundant group names Linnean-ranked classifications. Here we provide unranked based summary phylogeny 830 that includes all currently recognized families and 287 fossil taxa. We definitions 90 clade review seven previously defined names. For each 97 names, etymology name, species constituent diagnostic apomorphies, synonyms, discussion clade's nomenclatural systematic history. new is free only one name describe, yielding comprehensive explicitly has emerged 21st century rests foundation previous 200 years research systematics fishes.

Language: Английский

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Improved estimation of macroevolutionary rates from fossil data using a Bayesian framework

Paleobiology, Journal Year: 2019, Volume and Issue: 45(4), P. 546 - 570

Published: Sept. 1, 2019

Abstract The estimation of origination and extinction rates their temporal variation is central to understanding diversity patterns the evolutionary history clades. fossil record provides only direct evidence biodiversity changes through time has long been used infer dynamics in deep time. software PyRate implements a Bayesian framework analyze occurrence data estimate preservation, origination, while incorporating several sources uncertainty. Building upon this framework, we present suite methodological advances including more complex realistic models preservation first likelihood-based test compare fit across different models. Further, develop new reversible jump Markov chain Monte Carlo algorithm variation, which reliable results includes an explicit number placement statistically significant rate changes. Finally, implement C++ library that speeds up analyses by orders magnitude, therefore facilitating application methods large sets. We demonstrate functionalities extensive simulations with analysis set Cenozoic marine mammals. our analytical against two widely alternative rates, revealing decisively outperforms them range simulated Our indicate statistical model testing, often neglected fossil-based macroevolutionary analyses, crucial obtain accurate robust results.

Language: Английский

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Estimating Diversification Rates on Incompletely Sampled Phylogenies: Theoretical Concerns and Practical Solutions

Systematic Biology, Journal Year: 2019, Volume and Issue: 69(3), P. 602 - 611

Published: Dec. 3, 2019

Abstract Molecular phylogenies are a key source of information about the tempo and mode species diversification. However, most empirical do not contain representatives all species, such that diversification rates typically estimated from incompletely sampled data. Most researchers recognize incomplete sampling can lead to biased rate estimates, but statistical properties methods for accommodating remain poorly known. In this point view, we demonstrate theoretical concerns with widespread use analytical corrections sparsely higher taxonomic groups. particular, based on “sampling fractions” low power infer variation when it is present, depending likelihood function used inference. extreme, fraction correction spurious patterns driven solely by unbalanced across tree in concert overall shifts. Stochastic polytomy resolution provides an alternative approaches avoids some these biases. We show stochastic resolvers greatly improve common analyses estimate shifts rates. introduce new method (Taxonomic Addition Complete Trees [TACT]) uses birth–death-sampling estimators ultrametric phylogeny branching times unsampled taxa, compatibly place taxa onto backbone phylogeny. close practical recommendations inference under several scenarios sampling. [Birth–death process; diversification; sampling; phylogenetic uncertainty; heterogeneity; shifts; resolution.]

Language: Английский

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Trait similarity in reef fish faunas across the world’s oceans

Proceedings of the National Academy of Sciences, Journal Year: 2021, Volume and Issue: 118(12)

Published: March 15, 2021

Significance Biogeography has focused extensively on species identities, yet global patterns in traits (morphological, physiological, or behavioral features) are not well known, including whether they shaped by modern environmental conditions shared evolutionary history. Our analysis of nearly 3,000 reef fish found a consistent variety across ocean basins worldwide, backbone 21 trait combinations common to all oceans. At the regional scale, we that assemblages similar environments had compositions despite being separated up 100 degrees latitude and hosting different with distinct histories. Thus, have likely regardless geography, identity,

Language: Английский

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Phenology in freshwaters: a review and recommendations for future research

Ecography, Journal Year: 2021, Volume and Issue: 2022(6)

Published: Feb. 12, 2021

Phenology changes are increasingly recognized as a common response of species to ongoing global change. can be influenced by environmental cues that impact the initiation or duration life history events well intrinsic organismal traits may affect how different respond such cues. Despite importance phenology for biodiversity conservation demonstrated terrestrial and marine research, freshwater is understudied. Therefore, we conducted literature review on research summarize spatial, taxonomic temporal biases studies; relationships between metrics, studied in these systems. We find freshwaters limited lack long‐term time‐series data, especially lotic habitats. metrics differed lentic habitats, with limnological focused planktonic population growth whereas macroinvertebrate emergence fish spawning seasons most frequently aspects streams rivers. Across temperature investigated cue, additional attention resources hydrology influencing environments, respectively. Knowledge gaps contemporary include tropical systems, understanding non‐salmonid testing hypotheses related traits. recommend future broaden biological, spatial scales studies make use novel data sources, methods technologies address gaps.

Language: Английский

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Convergent Gene Duplication in Arctic and Antarctic Teleost Fishes

ZOOLOGICAL SCIENCE, Journal Year: 2025, Volume and Issue: 42(1)

Published: Jan. 21, 2025

Teleost fishes have independently colonized polar regions multiple times, facing many physiological and biochemical challenges due to frigid temperatures. Although increased gene copy numbers can contribute adaptive evolution in extreme environments, it remains unclear which categories of genes exhibit associated with colonization. Using 104 species ray-finned fishes, we systematically identified a significant correlation between number colonization after phylogenetic correction. Several encoding extracellular glycoproteins, including zona pellucida (ZP) proteins, increase their Antarctic notothenioid exhibited elevated across fish lineages. Additionally, some reported be highly expressed under cold stress, such as cold-inducible RNA-binding protein (CIRBP), had significantly fishes. Further analysis will provide fundamental basis for understanding the role duplication adaptations.

Language: Английский

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Global analysis of fish growth rates shows weaker responses to temperature than metabolic predictions

Global Ecology and Biogeography, Journal Year: 2020, Volume and Issue: 29(12), P. 2203 - 2213

Published: Sept. 24, 2020

Abstract Aim Higher temperatures increase the metabolic rate of ectothermic organisms up to a certain level and make them grow faster. This temperature‐sensitivity growth is frequently used predict long‐term effects climate warming on ectotherms. Yet, realized also depends ecological factors evolutionary adaptation. Here we study whether faster observed along temperature clines within between marine fish species from polar tropical regions. Location Global. Time period The sampling or publication year for 718 observations before 1980, 1,073 1980 2000, 390 after 2000 (for 336 no was recorded). Major taxa studied Marine teleost elasmobranchs. Methods are using 2,517 observations, representing 771 in 165 ecoregions. presented with Q 10 , describing relative each °C increase. Results We find weak within‐ between‐species growth. typical within‐species effect has 1.1. little higher ( = 1.4, 1.2 when corrected phylogenetic relationships). When analysed per guild, responses vary nearly independent large demersals 1.1) positive small pelagics 1.6) elasmobranchs 2.3). Average ecoregions high primary production. Main conclusion change average weaker than predicted by theory, suggesting that predictions not sustainable an ecosystem context. response associated may hence be shaped more local environmental dynamics physiological currently present.

Language: Английский

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Delineating reef fish trophic guilds with global gut content data synthesis and phylogeny

PLoS Biology, Journal Year: 2020, Volume and Issue: 18(12), P. e3000702 - e3000702

Published: Dec. 28, 2020

Understanding species' roles in food webs requires an accurate assessment of their trophic niche. However, it is challenging to delineate potential interactions across ecosystem, and a paucity empirical information often leads inconsistent definitions guilds based on expert opinion, especially when applied hyperdiverse ecosystems. Using coral reef fishes as model group, we show that experts disagree the assignment broad for more than 20% species, which hampers comparability studies. Here, propose quantitative, unbiased, reproducible approach define apply recent advances machine learning predict probabilities pairwise with high accuracy. We synthesize data from community-wide gut content analyses tropical worldwide, resulting diet 13,961 individuals belonging 615 fish. then use network analysis identify 8 Bayesian phylogenetic modeling can be predicted phylogeny maximum body size. Finally, test whether Our models achieved misclassification error less 5%, indicating our results quantitative categorization scheme, well high-resolution interactions. By applying framework most diverse vertebrate consumer other organismal groups advance reproducibility trait-based ecology. work thus provides viable account complexity predator-prey highly

Language: Английский

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