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Hauber ME, Nagy J, Sheard C, Antonson ND, Street SE, Healy SD, Lala KN, Mainwaring MC. Nest architecture influences host use by avian brood parasites and is shaped by coevolutionary dynamics. Proc Biol Sci 2024; 291:20231734. [PMID: 38196369 PMCID: PMC10777141 DOI: 10.1098/rspb.2023.1734] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2023] [Accepted: 11/27/2023] [Indexed: 01/11/2024] Open
Abstract
Brood (social) parasites and their hosts exhibit a wide range of adaptations and counter-adaptations as part of their ongoing coevolutionary arms races. Obligate avian brood parasites are expected to use potential host species with more easily accessible nests, while potential hosts are expected to evade parasitism by building more concealed nests that are difficult for parasites to enter and in which to lay eggs. We used phylogenetically informed comparative analyses, a global database of the world's brood parasites, their host species, and the design of avian host and non-host nests (approx. 6200 bird species) to examine first, whether parasites preferentially target host species that build open nests and, second, whether host species that build enclosed nests are more likely to be targeted by specialist parasites. We found that species building more accessible nests are more likely to serve as hosts, while host species with some of the more inaccessible nests are targeted by more specialist brood parasites. Furthermore, evolutionary-transition analyses demonstrate that host species building enclosed nests frequently evolve to become non-hosts. We conclude that nest architecture and the accessibility of nests for parasitism represent a critical stage of the ongoing coevolutionary arms race between avian brood parasites and their hosts.
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Affiliation(s)
- Mark E. Hauber
- Advanced Science Research Center and Program in Psychology, Graduate Center of the City University of New York, 85 St Nicholas Terrace, New York, NY 10031, USA
| | - Jenő Nagy
- HUN-REN-UD Conservation Biology Research Group, Department of Botany, University of Debrecen, Egyetem tér 1, 4032 Debrecen, Hungary
| | - Catherine Sheard
- School of Earth Sciences, University of Bristol, Bristol BS8 1TQ, UK
- School of Biological Sciences, University of Aberdeen, Aberdeen AB24 2TZ, UK
| | - Nicholas D. Antonson
- Department of Ecology, Evolution, and Organismal Biology, Brown University, Providence, RI 02912, USA
| | - Sally E. Street
- Department of Anthropology, Durham University, Durham DH1 3LE, UK
| | - Susan D. Healy
- School of Biology, University of St Andrews, St Andrews KY16 9TH, UK
| | - Kevin N. Lala
- School of Biology, University of St Andrews, St Andrews KY16 9TH, UK
| | - Mark C. Mainwaring
- School of Environmental and Natural Sciences, Bangor University, Bangor LL57 2DG, UK
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2
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Katona G, Szabó F, Végvári Z, Székely T, Liker A, Freckleton RP, Vági B, Székely T. Evolution of reproductive modes in sharks and rays. J Evol Biol 2023; 36:1630-1640. [PMID: 37885147 DOI: 10.1111/jeb.14231] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Accepted: 08/30/2023] [Indexed: 10/28/2023]
Abstract
The ecological and life history drivers of the diversification of reproductive modes in early vertebrates are not fully understood. Sharks, rays and chimaeras (group Chondrichthyes) have an unusually diverse variety of reproductive modes and are thus an ideal group to test the factors driving the evolution of reproductive complexity. Here, using 960 species representing all major Chondrichthyes taxa, we reconstruct the evolution of their reproduction modes and investigate the ecological and life history predictors of reproduction. We show that the ancestral Chondrichthyes state was egg-laying and find multiple independent transitions between egg-laying and live-bearing via an intermediate state of yolk-only live-bearing. Using phylogenetically informed analysis, we also show that live-bearing species have larger body size and larger offspring than egg-laying species. In addition, live-bearing species are distributed over shallow to intermediate depths, while egg-layers are typically found in deeper waters. This suggests that live-bearing is more closely associated with pelagic, rather than demersal habitats. Taken together, using a basal vertebrate group as a model, we demonstrat how reproductive mode co-evolves with environmental conditions and life-history traits.
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Affiliation(s)
- Gergely Katona
- Department of Evolutionary Zoology and Human Biology, University of Debrecen, Debrecen, Hungary
| | - Flóra Szabó
- Department of Evolutionary Zoology and Human Biology, University of Debrecen, Debrecen, Hungary
| | - Zsolt Végvári
- Centre for Ecological Research, Institute of Aquatic Ecology, Budapest, Hungary
- Senckenberg Deutsches Entomologisches Institut, Müncheberg, Germany
| | - Tamás Székely
- Department of Evolutionary Zoology and Human Biology, University of Debrecen, Debrecen, Hungary
| | - András Liker
- MTA-PE Evolutionary Ecology Research Group, University of Pannonia, Veszprém, Hungary
- Behavioural Ecology Research Group, Center for Natural Sciences, University of Pannonia, Veszprém, Hungary
| | - Robert P Freckleton
- Department of Animal and Plant Sciences, University of Sheffield, Sheffield, UK
| | - Balázs Vági
- Department of Evolutionary Zoology and Human Biology, University of Debrecen, Debrecen, Hungary
| | - Tamás Székely
- Department of Evolutionary Zoology and Human Biology, University of Debrecen, Debrecen, Hungary
- Milner Centre for Evolution, University of Bath, Bath, UK
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3
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Stöck M, Kratochvíl L, Kuhl H, Rovatsos M, Evans BJ, Suh A, Valenzuela N, Veyrunes F, Zhou Q, Gamble T, Capel B, Schartl M, Guiguen Y. A brief review of vertebrate sex evolution with a pledge for integrative research: towards ' sexomics'. Philos Trans R Soc Lond B Biol Sci 2021; 376:20200426. [PMID: 34247497 PMCID: PMC8293304 DOI: 10.1098/rstb.2020.0426] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/08/2021] [Indexed: 02/07/2023] Open
Abstract
Triggers and biological processes controlling male or female gonadal differentiation vary in vertebrates, with sex determination (SD) governed by environmental factors or simple to complex genetic mechanisms that evolved repeatedly and independently in various groups. Here, we review sex evolution across major clades of vertebrates with information on SD, sexual development and reproductive modes. We offer an up-to-date review of divergence times, species diversity, genomic resources, genome size, occurrence and nature of polyploids, SD systems, sex chromosomes, SD genes, dosage compensation and sex-biased gene expression. Advances in sequencing technologies now enable us to study the evolution of SD at broader evolutionary scales, and we now hope to pursue a sexomics integrative research initiative across vertebrates. The vertebrate sexome comprises interdisciplinary and integrated information on sexual differentiation, development and reproduction at all biological levels, from genomes, transcriptomes and proteomes, to the organs involved in sexual and sex-specific processes, including gonads, secondary sex organs and those with transcriptional sex-bias. The sexome also includes ontogenetic and behavioural aspects of sexual differentiation, including malfunction and impairment of SD, sexual differentiation and fertility. Starting from data generated by high-throughput approaches, we encourage others to contribute expertise to building understanding of the sexomes of many key vertebrate species. This article is part of the theme issue 'Challenging the paradigm in sex chromosome evolution: empirical and theoretical insights with a focus on vertebrates (Part I)'.
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Affiliation(s)
- Matthias Stöck
- Leibniz-Institute of Freshwater Ecology and Inland Fisheries—IGB (Forschungsverbund Berlin), Müggelseedamm 301, 12587 Berlin, Germany
- Amphibian Research Center, Hiroshima University, Higashi-Hiroshima 739-8526, Japan
| | - Lukáš Kratochvíl
- Department of Ecology, Faculty of Science, Charles University, Viničná 7, 12844 Prague, Czech Republic
| | - Heiner Kuhl
- Leibniz-Institute of Freshwater Ecology and Inland Fisheries—IGB (Forschungsverbund Berlin), Müggelseedamm 301, 12587 Berlin, Germany
| | - Michail Rovatsos
- Amphibian Research Center, Hiroshima University, Higashi-Hiroshima 739-8526, Japan
| | - Ben J. Evans
- Department of Biology, McMaster University, Life Sciences Building Room 328, 1280 Main Street West, Hamilton, Ontario, Canada L8S 4K1
| | - Alexander Suh
- School of Biological Sciences, University of East Anglia, Norwich Research Park, Norwich NR4 7TU, UK
- Department of Organismal Biology—Systematic Biology, Evolutionary Biology Centre, Science for Life Laboratory, Uppsala University, Norbyvägen 18D, 75236 Uppsala, Sweden
| | - Nicole Valenzuela
- Department of Ecology, Evolution, and Organismal Biology, Iowa State University, Ames, IA 50011, USA
| | - Frédéric Veyrunes
- Institut des Sciences de l'Evolution de Montpellier, ISEM UMR 5554 (CNRS/Université de Montpellier/IRD/EPHE), Montpellier, France
| | - Qi Zhou
- MOE Laboratory of Biosystems Homeostasis and Protection and Zhejiang Provincial Key Laboratory for Cancer Molecular Cell Biology, Life Sciences Institute, Zhejiang University, Hangzhou, Zhejiang 310058, People's Republic of China
- Department of Neuroscience and Developmental Biology, University of Vienna, A-1090 Vienna, Austria
| | - Tony Gamble
- Department of Biological Sciences, Marquette University, Milwaukee, WI 53201, USA
| | - Blanche Capel
- Department of Cell Biology, Duke University Medical Center, Durham, NC 27710, USA
| | - Manfred Schartl
- Developmental Biochemistry, Biocenter, University of Würzburg, 97074 Würzburg, Germany
- The Xiphophorus Genetic Stock Center, Department of Chemistry and Biochemistry, Texas State University, San Marcos, TX 78666, USA
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4
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Gardner JD, Organ CL. Evolutionary Sample Size and Consilience in Phylogenetic Comparative Analysis. Syst Biol 2021; 70:1061-1075. [PMID: 33720380 DOI: 10.1093/sysbio/syab017] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2019] [Revised: 03/05/2021] [Accepted: 03/10/2021] [Indexed: 11/15/2022] Open
Abstract
Phylogenetic comparative methods (PCMs) are commonly used to study evolution and adaptation. However, frequently used PCMs for discrete traits mishandle single evolutionary transitions. They erroneously detect correlated evolution in these situations. For example, hair and mammary glands cannot be said to have evolved in a correlated fashion because each evolved only once in mammals, but a commonly used model (Pagel's Discrete) statistically supports correlated (dependent) evolution. Using simulations, we find that rate parameter estimation, which is central for model selection, is poor in these scenarios due to small effective (evolutionary) sample sizes of independent character state change. Pagel's Discrete model also tends to favor dependent evolution in these scenarios, in part, because it forces evolution through state combinations unobserved in the tip data. This model prohibits simultaneous dual transitions along branches. Models with underlying continuous data distributions (e.g., Threshold and GLMM) are less prone to favor correlated evolution, but are still susceptible when evolutionary sample sizes are small. We provide three general recommendations for researchers who encounter these common situations: 1) Create study designs that evaluate a priori hypotheses and maximize evolutionary sample sizes; 2) assess the suitability of evolutionary models-for discrete traits, we introduce the phylogenetic imbalance ratio; and 3) evaluate evolutionary hypotheses with a consilience of evidence from disparate fields, like biogeography and developmental biology. Consilience plays a central role in hypothesis testing within the historical sciences where experiments are difficult or impossible to conduct, such as many hypotheses about correlated evolution. These recommendations are useful for investigations that employ any type of PCM.
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Affiliation(s)
- Jacob D Gardner
- Department of Earth Sciences, Montana State University, Bozeman, MT 59717, USA
| | - Chris L Organ
- Department of Earth Sciences, Montana State University, Bozeman, MT 59717, USA
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5
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Katona G, Vági B, Végvári Z, Liker A, Freckleton RP, Bókony V, Székely T. Are evolutionary transitions in sexual size dimorphism related to sex determination in reptiles? J Evol Biol 2021; 34:594-603. [PMID: 33595859 DOI: 10.1111/jeb.13774] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2020] [Revised: 01/28/2021] [Accepted: 02/09/2021] [Indexed: 11/27/2022]
Abstract
Sex determination systems are highly variable in vertebrates, although neither the causes nor the implications of this diversity are fully understood. Theory suggests that sex determination is expected to relate to sexual size dimorphism, because environmental sex determination promotes sex-specific developmental bias in embryonic growth rates. Furthermore, selection for larger size in one sex or the other has been proposed to drive the evolution of different genetic sex determination systems. Here, we investigate whether sex determination systems relate to adult sexual size dimorphism, using 250 species of reptiles (Squamata, Testudines and Crocodylia) representing 26 families. Using phylogenetically informed analyses, we find that sexual size dimorphism is associated with sex determination: species with TSDIa sex determination (i.e. in which the proportion of female offspring increases with incubation temperature) have more female-biased size dimorphism than species with TSDII (i.e. species in which males are produced at mid temperatures). We also found a trend that species with TSD ancestors had more male-biased size dimorphism in XY sex chromosome systems than in ZW sex chromosome systems. Taken together, our results support the prediction that sexual size dimorphism is linked to sex-dependent developmental variations caused by environmental factors and also by sex chromosomes. Since the extent of size dimorphism is related to various behavioural, ecological and life-history differences between sexes, our results imply profound impacts of sex determination systems for vertebrate diversity.
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Affiliation(s)
- Gergely Katona
- Department of Evolutionary Zoology and Human Biology, University of Debrecen, Debrecen, Hungary
| | - Balázs Vági
- Department of Evolutionary Zoology and Human Biology, University of Debrecen, Debrecen, Hungary
| | - Zsolt Végvári
- Centre for Ecological Research, Eötvös Loránd Research Network, Danube Research Institute, Budapest, Hungary.,Senckenberg Deutsches Entomologisches Institut, Müncheberg, Germany
| | - András Liker
- MTA-PE Evolutionary Ecology Research Group, University of Pannonia, Veszprém, Hungary.,Behavioural Ecology Research Group, Center for Natural Sciences, University of Pannonia, Veszprém, Hungary
| | - Robert P Freckleton
- Department of Animal and Plant Sciences, University of Sheffield, Sheffield, UK
| | - Veronika Bókony
- Lendület Evolutionary Ecology Research Group, Plant Protection Institute, Centre for Agricultural Research, Eötvös Loránd Research Network, Budapest, Hungary
| | - Tamás Székely
- Department of Evolutionary Zoology and Human Biology, University of Debrecen, Debrecen, Hungary.,Milner Centre for Evolution, University of Bath, Bath, UK.,State Key Laboratory of Biocontrol, Department of Ecology, School of Life Sciences, Sun Yat-sen University, Guangzhou, China.,Ministry of Education Key Laboratory for Biodiversity and Ecological Engineering, College of Life Sciences, Beijing Normal University, Beijing, China
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6
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Inferred genetic architecture underlying evolution in a fossil stickleback lineage. Nat Ecol Evol 2020; 4:1549-1557. [PMID: 32839544 DOI: 10.1038/s41559-020-01287-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2020] [Accepted: 07/21/2020] [Indexed: 11/09/2022]
Abstract
Inferring the genetic architecture of evolution in the fossil record is difficult because genetic crosses are impossible, the acquisition of DNA is usually impossible and phenotype-genotype maps are rarely obvious. However, such inference is valuable because it reveals the genetic basis of microevolutionary change across many more generations than is possible in studies of extant taxa, thereby integrating microevolutionary process and macroevolutionary pattern. Here, we infer the genetic basis of pelvic skeleton reduction in Gasterosteus doryssus, a Miocene stickleback fish from a finely resolved stratigraphic sequence that spans nearly 17,000 years. Reduction in pelvic score, a categorical measure of pelvic structure, resulted primarily from reciprocal frequency changes of two discrete phenotypic classes. Pelvic vestiges also showed left-side larger asymmetry. These patterns implicate Pitx1, a large-effect gene whose deletion generates left-side larger asymmetry of pelvic vestiges in extant, closely related Gasterosteus aculeatus. In contrast, reductions in the length of the pelvic girdle and pelvic spines resulted from directional shifts of unimodal, continuous trait distributions, suggesting an additional suite of genes with minor, additive pelvic effects, again like G. aculeatus. Similar genetic architectures explain shared but phyletically independent patterns across 10 million years of stickleback evolution.
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7
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Cornejo-Páramo P, Lira-Noriega A, Ramírez-Suástegui C, Méndez-de-la-Cruz FR, Székely T, Urrutia AO, Cortez D. Sex determination systems in reptiles are related to ambient temperature but not to the level of climatic fluctuation. BMC Evol Biol 2020; 20:103. [PMID: 32807071 PMCID: PMC7433102 DOI: 10.1186/s12862-020-01671-y] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2019] [Accepted: 08/11/2020] [Indexed: 12/19/2022] Open
Abstract
Background Vertebrates exhibit diverse sex determination systems and reptiles stand out by having highly variable sex determinations that include temperature-dependent and genotypic sex determination (TSD and GSD, respectively). Theory predicts that populations living in either highly variable or cold climatic conditions should evolve genotypic sex determination to buffer the populations from extreme sex ratios, yet these fundamental predictions have not been tested across a wide range of taxa. Results Here, we use phylogenetic analyses of 213 reptile species representing 38 families (TSD = 101 species, GSD = 112 species) and climatic data to compare breeding environments between reptiles with GSD versus TSD. We show that GSD and TSD are confronted with the same level of climatic fluctuation during breeding seasons. However, TSD reptiles are significantly associated with warmer climates. We found a strong selection on the breeding season length that minimises exposure to cold and fluctuating climate. Phylogenetic path analyses comparing competing evolutionary hypotheses support that transitions in sex determination systems influenced the ambient temperature at which the species reproduces and nests. In turn, this interaction affects other variables such as the duration of the breeding season and life-history traits. Conclusions Taken together, our results challenge long-standing hypotheses about the association between sex determination and climate variability. We also show that ambient temperature is important during breeding seasons and it helps explain the effects of sex determination systems on the geographic distribution of extant reptile species.
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Affiliation(s)
- Paola Cornejo-Páramo
- Center for Genomics Sciences, UNAM, CP62210, Cuernavaca, Mexico.,Milner Centre for Evolution, Department of Biology and Biochemistry, University of Bath, Claverton Down, Bath, BA2 7AY, UK
| | - Andrés Lira-Noriega
- CONACYT Research Fellow, Red de Estudios Moleculares Avanzados, Instituto de Ecología, A.C. Carretera antigua a Coatepec 351, Col. El Haya, Xalapa, Veracruz, Mexico
| | - Ciro Ramírez-Suástegui
- Center for Genomics Sciences, UNAM, CP62210, Cuernavaca, Mexico.,Milner Centre for Evolution, Department of Biology and Biochemistry, University of Bath, Claverton Down, Bath, BA2 7AY, UK
| | | | - Tamás Székely
- Milner Centre for Evolution, Department of Biology and Biochemistry, University of Bath, Claverton Down, Bath, BA2 7AY, UK.,Department of Evolutionary Zoology and Human Biology, University of Debrecen, Debrecen, H-4032, Hungary
| | - Araxi O Urrutia
- Milner Centre for Evolution, Department of Biology and Biochemistry, University of Bath, Claverton Down, Bath, BA2 7AY, UK. .,Institute of Ecology, UNAM, 04510, Mexico City, Mexico.
| | - Diego Cortez
- Center for Genomics Sciences, UNAM, CP62210, Cuernavaca, Mexico.
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8
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Genevcius BC, Baker J, Bianchi FM, Marvaldi AE. Female‐driven intersexual coevolution in beetle genitalia. J Evol Biol 2020; 33:957-965. [DOI: 10.1111/jeb.13627] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2020] [Revised: 03/30/2020] [Accepted: 04/01/2020] [Indexed: 01/07/2023]
Affiliation(s)
- Bruno C. Genevcius
- Department of Genetics and Evolutionary Biology Institute of Biosciences University of São Paulo São Paulo Brazil
| | - Joanna Baker
- School of Biological Sciences University of Reading Reading UK
| | - Filipe M. Bianchi
- Department of Zoology Institute of Biosciences Federal University of Rio Grande do Sul Porto Alegre Brazil
| | - Adriana E. Marvaldi
- División Entomología Facultad de Ciencias Naturales y Museo Universidad Nacional de La Plata CONICET Buenos Aires Argentina
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9
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Rapid Change in Mammalian Eye Shape Is Explained by Activity Pattern. Curr Biol 2019; 29:1082-1088.e3. [PMID: 30853430 DOI: 10.1016/j.cub.2019.02.017] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2018] [Revised: 01/08/2019] [Accepted: 02/05/2019] [Indexed: 11/21/2022]
Abstract
The rate of morphological evolution along the branches of a phylogeny varies widely [1-6]. Although such rate variation is often assumed to reflect the strength of historical natural selection resulting in adaptation [7-14], this lacks empirical and analytical evidence. One way to demonstrate a relationship between branchwise rates and adaptation would be to show that rapid rates of evolution are linked with ecological shifts or key innovations. Here, we test for this link by determining whether activity pattern, the time of day at which species are active, explains rapid bursts of evolutionary change in eye shape. Using modern approaches to identify shifts in the rate of morphological evolution [7, 13], we find that over 74% of rapid eye-shape change during mammalian evolutionary history is directly explained by distinct selection pressures acting on nocturnal, cathemeral, and diurnal species. Our results reveal how ecological changes occurring along the branches of a phylogeny can manifest in subsequent changes in the rate of morphological evolution. Although selective pressures exerted by different activity patterns have acted uniformly across all mammals, we find differences in the rate of eye-shape evolution among orders. The key to understanding this is in how ecology itself has evolved. We find heterogeneity in how activity pattern has evolved among mammals that ultimately led to differences in the rate of eye-shape evolution among species. Our approach represents an exciting new way to pinpoint factors driving adaptation, enabling a clearer understanding of the factors that drive the evolution of biological diversity.
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10
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Bókony V, Milne G, Pipoly I, Székely T, Liker A. Sex ratios and bimaturism differ between temperature-dependent and genetic sex-determination systems in reptiles. BMC Evol Biol 2019; 19:57. [PMID: 30777013 PMCID: PMC6378719 DOI: 10.1186/s12862-019-1386-3] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2018] [Accepted: 02/12/2019] [Indexed: 01/05/2023] Open
Abstract
BACKGROUND Sex-determining systems may profoundly influence the ecology, behaviour and demography of animals, yet these relationships are poorly understood. Here we investigate whether species with temperature-dependent (TSD) and genetic sex determination (GSD) differ in key demographic traits, using data from 181 species representing all major phylogenetic lineages of extant reptiles. RESULTS We show that species with TSD exhibit significantly higher within-species variance in sex ratios than GSD species in three major life stages: birth or hatching, juvenility and adulthood. In contrast, sex differences in adult mortality rates do not differ between GSD and TSD species. However, TSD species exhibit significantly greater sex differences in maturation ages than GSD species. CONCLUSION These results support the recent theoretical model that evolution of TSD is facilitated by sex-specific fitness benefits of developmental temperatures due to bimaturism. Our findings suggest that different sex-determination systems are associated with different demographic characteristics that may influence population viability and social evolution.
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Affiliation(s)
- Veronika Bókony
- Lendület Evolutionary Ecology Research Group, Plant Protection Institute, Centre for Agricultural Research, Hungarian Academy of Sciences, Herman Ottó út 15, Budapest, 1022 Hungary
| | - Gregory Milne
- Milner Centre for Evolution, Department of Biology and Biochemistry, University of Bath, Bath, BA2 7AY UK
| | - Ivett Pipoly
- MTA-PE Evolutionary Ecology Research Group, University of Pannonia, Pf. 158, Veszprém, 8201 Hungary
| | - Tamás Székely
- Milner Centre for Evolution, Department of Biology and Biochemistry, University of Bath, Bath, BA2 7AY UK
- Department of Evolutionary Zoology, University of Debrecen, Egyetem tér 1, Debrecen, 4032 Hungary
| | - András Liker
- MTA-PE Evolutionary Ecology Research Group, University of Pannonia, Pf. 158, Veszprém, 8201 Hungary
- Department of Limnology, University of Pannonia, Pf. 158, Veszprém, 8201 Hungary
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11
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Bókony V, Kövér S, Nemesházi E, Liker A, Székely T. Climate-driven shifts in adult sex ratios via sex reversals: the type of sex determination matters. Philos Trans R Soc Lond B Biol Sci 2018; 372:rstb.2016.0325. [PMID: 28760766 DOI: 10.1098/rstb.2016.0325] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/08/2017] [Indexed: 01/09/2023] Open
Abstract
Sex reversals whereby individuals of one genetic sex develop the phenotype of the opposite sex occur in ectothermic vertebrates with genetic sex-determination systems that are sensitive to extreme temperatures during sexual differentiation. Recent rises in global temperatures have led researchers to predict that sex reversals will become more common, resulting in the distortion of many populations' sex ratios. However, it is unclear whether susceptibility to climate-driven sex-ratio shifts depends on the type of sex determination that varies across species. First, we show here using individual-based theoretical models that XX/XY (male-heterogametic) and ZZ/ZW (female-heterogametic) sex-determination systems can respond differentially to temperature-induced sex reversals. Interestingly, the impacts of climate warming on adult sex ratio (ASR) depend on the effects of both genotypic and phenotypic sex on survival and reproduction. Second, we analyse the temporal changes of ASR in natural amphibian populations using data from the literature, and find that ASR shifted towards males in ZZ/ZW species over the past 60 years, but did not change significantly in XX/XY species. Our results highlight the fact that we need a better understanding of the interactions between genetic and environmental sex-determining mechanisms to predict the responses of ectotherms to climate change and the associated extinction risks.This article is part of the themed issue 'Adult sex ratios and reproductive decisions: a critical re-examination of sex differences in human and animal societies'.
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Affiliation(s)
- Veronika Bókony
- Lendület Evolutionary Ecology Research Group, Plant Protection Institute, Centre for Agricultural Research, Hungarian Academy of Sciences, Herman Ottó út 15, 1022 Budapest, Hungary
| | - Szilvia Kövér
- Department of Ecology, University of Veterinary Medicine, Rottenbiller u. 50, 1077 Budapest, Hungary
| | - Edina Nemesházi
- Lendület Evolutionary Ecology Research Group, Plant Protection Institute, Centre for Agricultural Research, Hungarian Academy of Sciences, Herman Ottó út 15, 1022 Budapest, Hungary.,Department of Ecology, University of Veterinary Medicine, Rottenbiller u. 50, 1077 Budapest, Hungary
| | - András Liker
- Department of Limnology, University of Pannonia, Pf. 158, 8201 Veszprém, Hungary.,MTA-PE Evolutionary Ecology Research Group, University of Pannonia, Pf. 158, 8201 Veszprém, Hungary
| | - Tamás Székely
- Department of Biology and Biochemistry, Milner Centre for Evolution, University of Bath, Bath BA2 7AY, UK
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12
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Kelley N. Paleontology: Scanning for Sea Monsters. Curr Biol 2017; 27:R1316-R1318. [PMID: 29257966 DOI: 10.1016/j.cub.2017.11.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Land vertebrates have returned to the ocean several times, radically transforming their outward anatomy in the process. A new study of Mesozoic marine reptiles shows how minute balance organs in the inner ear transformed at the same time.
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Affiliation(s)
- Neil Kelley
- Department of Earth and Environmental Sciences, Vanderbilt University, Nashville, TN 37240, USA.
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13
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Liu J, Organ CL, Benton MJ, Brandley MC, Aitchison JC. Live birth in an archosauromorph reptile. Nat Commun 2017; 8:14445. [PMID: 28195584 PMCID: PMC5316873 DOI: 10.1038/ncomms14445] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2016] [Accepted: 12/30/2016] [Indexed: 11/09/2022] Open
Abstract
Live birth has evolved many times independently in vertebrates, such as mammals and diverse groups of lizards and snakes. However, live birth is unknown in the major clade Archosauromorpha, a group that first evolved some 260 million years ago and is represented today by birds and crocodilians. Here we report the discovery of a pregnant long-necked marine reptile (Dinocephalosaurus) from the Middle Triassic (∼245 million years ago) of southwest China showing live birth in archosauromorphs. Our discovery pushes back evidence of reproductive biology in the clade by roughly 50 million years, and shows that there is no fundamental reason that archosauromorphs could not achieve live birth. Our phylogenetic models indicate that Dinocephalosaurus determined the sex of their offspring by sex chromosomes rather than by environmental temperature like crocodilians. Our results provide crucial evidence for genotypic sex determination facilitating land-water transitions in amniotes.
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Affiliation(s)
- Jun Liu
- School of Resources and Environmental Engineering, Hefei University of Technology, Hefei 230009, China.,Chengdu Center, China Geological Survey, Chengdu 610081, China.,State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, CAS, Nanjing 210008, China
| | - Chris L Organ
- Department of Earth Sciences, Montana State University, Bozeman, Montana 59717, USA
| | - Michael J Benton
- School of Earth Sciences, University of Bristol, Bristol BS8 1RJ, UK
| | - Matthew C Brandley
- School of Life and Environmental Sciences, The University of Sydney, Sydney, New South Wales 2006, Australia
| | - Jonathan C Aitchison
- School of Earth and Environmental Sciences, University of Queensland, Brisbane, Queensland 4072, Australia
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14
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Motani R, Jiang DY, Rieppel O, Xue YF, Tintori A. Adult sex ratio, sexual dimorphism and sexual selection in a Mesozoic reptile. Proc Biol Sci 2016; 282:rspb.2015.1658. [PMID: 26378218 DOI: 10.1098/rspb.2015.1658] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
The evolutionary history of sexual selection in the geologic past is poorly documented based on quantification, largely because of difficulty in sexing fossil specimens. Even such essential ecological parameters as adult sex ratio (ASR) and sexual size dimorphism (SSD) are rarely quantified, despite their implications for sexual selection. To enable their estimation, we propose a method for unbiased sex identification based on sexual shape dimorphism, using size-independent principal components of phenotypic data. We applied the method to test sexual selection in Keichousaurus hui, a Middle Triassic (about 237 Ma) sauropterygian with an unusually large sample size for a fossil reptile. Keichousaurus hui exhibited SSD biased towards males, as in the majority of extant reptiles, to a minor degree (sexual dimorphism index -0.087). The ASR is about 60% females, suggesting higher mortality of males over females. Both values support sexual selection of males in this species. The method may be applied to other fossil species. We also used the Gompertz allometric equation to study the sexual shape dimorphism of K. hui and found that two sexes had largely homogeneous phenotypes at birth except in the humeral width, contrary to previous suggestions derived from the standard allometric equation.
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Affiliation(s)
- Ryosuke Motani
- Department of Earth and Planetary Sciences, University of California, Davis, One Shields Avenue, Davis, CA 95616, USA
| | - Da-yong Jiang
- Laboratory of Orogenic Belt and Crustal Evolution, Ministry of Education; Department of Geology and Geological Museum, Peking University, Yiheyuan Street 5, Beijing 100871, People's Republic of China
| | - Olivier Rieppel
- Center of Integrative Research, The Field Museum, Chicago, IL 60605-2496, USA
| | - Yi-fan Xue
- Laboratory of Orogenic Belt and Crustal Evolution, Ministry of Education; Department of Geology and Geological Museum, Peking University, Yiheyuan Street 5, Beijing 100871, People's Republic of China
| | - Andrea Tintori
- Dipartimento di Scienze della Terra, Università degli Studi di Milano, Via Mangiagalli, Milan 34-20133, Italy
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15
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Sabath N, Itescu Y, Feldman A, Meiri S, Mayrose I, Valenzuela N. Sex determination, longevity, and the birth and death of reptilian species. Ecol Evol 2016; 6:5207-20. [PMID: 27551377 PMCID: PMC4984498 DOI: 10.1002/ece3.2277] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2016] [Revised: 06/01/2016] [Accepted: 06/03/2016] [Indexed: 11/08/2022] Open
Abstract
Vertebrate sex-determining mechanisms (SDMs) are triggered by the genotype (GSD), by temperature (TSD), or occasionally, by both. The causes and consequences of SDM diversity remain enigmatic. Theory predicts SDM effects on species diversification, and life-span effects on SDM evolutionary turnover. Yet, evidence is conflicting in clades with labile SDMs, such as reptiles. Here, we investigate whether SDM is associated with diversification in turtles and lizards, and whether alterative factors, such as lifespan's effect on transition rates, could explain the relative prevalence of SDMs in turtles and lizards (including and excluding snakes). We assembled a comprehensive dataset of SDM states for squamates and turtles and leveraged large phylogenies for these two groups. We found no evidence that SDMs affect turtle, squamate, or lizard diversification. However, SDM transition rates differ between groups. In lizards TSD-to-GSD surpass GSD-to-TSD transitions, explaining the predominance of GSD lizards in nature. SDM transitions are fewer in turtles and the rates are similar to each other (TSD-to-GSD equals GSD-to-TSD), which, coupled with TSD ancestry, could explain TSD's predominance in turtles. These contrasting patterns can be explained by differences in life history. Namely, our data support the notion that in general, shorter lizard lifespan renders TSD detrimental favoring GSD evolution in squamates, whereas turtle longevity permits TSD retention. Thus, based on the macro-evolutionary evidence we uncovered, we hypothesize that turtles and lizards followed different evolutionary trajectories with respect to SDM, likely mediated by differences in lifespan. Combined, our findings revealed a complex evolutionary interplay between SDMs and life histories that warrants further research that should make use of expanded datasets on unexamined taxa to enable more conclusive analyses.
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Affiliation(s)
- Niv Sabath
- Department of Molecular Biology and Ecology of Plants Tel Aviv University Tel Aviv 69978 Israel
| | - Yuval Itescu
- Department of Zoology Tel Aviv University Tel Aviv 69978 Israel
| | - Anat Feldman
- Department of Zoology Tel Aviv University Tel Aviv 69978 Israel
| | - Shai Meiri
- Department of Zoology Tel Aviv University Tel Aviv 69978 Israel
| | - Itay Mayrose
- Department of Molecular Biology and Ecology of Plants Tel Aviv University Tel Aviv 69978 Israel
| | - Nicole Valenzuela
- Department of Ecology, Evolution and Organismal Biology Iowa State University Ames Iowa 50011
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16
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Organ CL, Cooper LN, Hieronymus TL. Macroevolutionary developmental biology: Embryos, fossils, and phylogenies. Dev Dyn 2015; 244:1184-92. [PMID: 26250386 DOI: 10.1002/dvdy.24318] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2014] [Revised: 06/16/2015] [Accepted: 06/17/2015] [Indexed: 12/23/2022] Open
Abstract
The field of evolutionary developmental biology is broadly focused on identifying the genetic and developmental mechanisms underlying morphological diversity. Connecting the genotype with the phenotype means that evo-devo research often considers a wide range of evidence, from genetics and morphology to fossils. In this commentary, we provide an overview and framework for integrating fossil ontogenetic data with developmental data using phylogenetic comparative methods to test macroevolutionary hypotheses. We survey the vertebrate fossil record of preserved embryos and discuss how phylogenetic comparative methods can integrate data from developmental genetics and paleontology. Fossil embryos provide limited, yet critical, developmental data from deep time. They help constrain when developmental innovations first appeared during the history of life and also reveal the order in which related morphologies evolved. Phylogenetic comparative methods provide a powerful statistical approach that allows evo-devo researchers to infer the presence of nonpreserved developmental traits in fossil species and to detect discordant evolutionary patterns and processes across levels of biological organization.
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Affiliation(s)
- Chris L Organ
- Department of Microbiology and Immunology, Montana State University, Bozeman, Montana.,Department of Earth Sciences, Montana State University, Bozeman, Montana
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17
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Janes DE, Organ CL, Stiglec R, O'Meally D, Sarre SD, Georges A, Graves JAM, Valenzuela N, Literman RA, Rutherford K, Gemmell N, Iverson JB, Tamplin JW, Edwards SV, Ezaz T. Molecular evolution of Dmrt1 accompanies change of sex-determining mechanisms in reptilia. Biol Lett 2015; 10:20140809. [PMID: 25540158 DOI: 10.1098/rsbl.2014.0809] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
In reptiles, sex-determining mechanisms have evolved repeatedly and reversibly between genotypic and temperature-dependent sex determination. The gene Dmrt1 directs male determination in chicken (and presumably other birds), and regulates sex differentiation in animals as distantly related as fruit flies, nematodes and humans. Here, we show a consistent molecular difference in Dmrt1 between reptiles with genotypic and temperature-dependent sex determination. Among 34 non-avian reptiles, a convergently evolved pair of amino acids encoded by sequence within exon 2 near the DM-binding domain of Dmrt1 distinguishes species with either type of sex determination. We suggest that this amino acid shift accompanied the evolution of genotypic sex determination from an ancestral condition of temperature-dependent sex determination at least three times among reptiles, as evident in turtles, birds and squamates. This novel hypothesis describes the evolution of sex-determining mechanisms as turnover events accompanied by one or two small mutations.
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Affiliation(s)
- Daniel E Janes
- Department of Organismic and Evolutionary Biology, Harvard University, Cambridge, MA 02138, USA Department of Ecology, Evolution, and Organismal Biology, Iowa State University, Ames, IA 50011, USA
| | - Christopher L Organ
- Department of Microbiology and Immunology, Montana State University, Bozeman, MT 59717, USA
| | - Rami Stiglec
- Institute for Applied Ecology, University of Canberra, Canberra, Australian Capital Territory 2601, Australia
| | - Denis O'Meally
- Institute for Applied Ecology, University of Canberra, Canberra, Australian Capital Territory 2601, Australia
| | - Stephen D Sarre
- Institute for Applied Ecology, University of Canberra, Canberra, Australian Capital Territory 2601, Australia
| | - Arthur Georges
- Institute for Applied Ecology, University of Canberra, Canberra, Australian Capital Territory 2601, Australia
| | - Jennifer A M Graves
- Institute for Applied Ecology, University of Canberra, Canberra, Australian Capital Territory 2601, Australia
| | - Nicole Valenzuela
- Department of Ecology, Evolution, and Organismal Biology, Iowa State University, Ames, IA 50011, USA
| | - Robert A Literman
- Department of Ecology, Evolution, and Organismal Biology, Iowa State University, Ames, IA 50011, USA
| | - Kim Rutherford
- Allen Wilson Centre, Department of Anatomy, University of Otago, Dunedin 9054, New Zealand
| | - Neil Gemmell
- Allen Wilson Centre, Department of Anatomy, University of Otago, Dunedin 9054, New Zealand
| | - John B Iverson
- Department of Biology, Earlham College, Richmond, IN 47374, USA
| | - Jeffrey W Tamplin
- Department of Biology, University of Northern Iowa, Cedar Falls, IA 50614, USA
| | - Scott V Edwards
- Department of Organismic and Evolutionary Biology, Harvard University, Cambridge, MA 02138, USA
| | - Tariq Ezaz
- Institute for Applied Ecology, University of Canberra, Canberra, Australian Capital Territory 2601, Australia
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18
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Blackburn DG, Starck JM. Morphological specializations for fetal maintenance in viviparous vertebrates: An introduction and historical retrospective. J Morphol 2015; 276:E1-16. [DOI: 10.1002/jmor.20410] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2015] [Accepted: 05/11/2015] [Indexed: 12/18/2022]
Affiliation(s)
- Daniel G. Blackburn
- Department of Biology; and Electron Microscopy Center; Trinity College; Hartford Connecticut 06106
| | - J. Matthias Starck
- Department of Biology; University of Munich; D-82152 Planegg-Martinsried Germany
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19
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Kelley NP, Pyenson ND. Evolutionary innovation and ecology in marine tetrapods from the Triassic to the Anthropocene. Science 2015; 348:aaa3716. [DOI: 10.1126/science.aaa3716] [Citation(s) in RCA: 97] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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20
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Wang C, Tang X, Xin Y, Yue F, Yan X, Liu B, An B, Wang X, Chen Q. Identification of Sex Chromosomes by Means of Comparative Genomic Hybridization in a Lizard, Eremias multiocellata. Zoolog Sci 2015; 32:151-6. [DOI: 10.2108/zs130246] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Affiliation(s)
- Cui Wang
- School of Life Science, Lanzhou University, Lanzhou 730000, China
| | - Xiaolong Tang
- School of Life Science, Lanzhou University, Lanzhou 730000, China
| | - Ying Xin
- School of Life Science, Lanzhou University, Lanzhou 730000, China
| | - Feng Yue
- School of Life Science, Lanzhou University, Lanzhou 730000, China
| | - Xuefeng Yan
- School of Life Science, Lanzhou University, Lanzhou 730000, China
| | - Bingbing Liu
- School of Life Science, Lanzhou University, Lanzhou 730000, China
| | - Bei An
- School of Basic Medical Sciences, Lanzhou University, Lanzhou, 730000, China
| | - Xi Wang
- School of Life Science, Lanzhou University, Lanzhou 730000, China
| | - Qiang Chen
- School of Life Science, Lanzhou University, Lanzhou 730000, China
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21
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Scheyer TM, Romano C, Jenks J, Bucher H. Early Triassic marine biotic recovery: the predators' perspective. PLoS One 2014; 9:e88987. [PMID: 24647136 PMCID: PMC3960099 DOI: 10.1371/journal.pone.0088987] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2013] [Accepted: 01/13/2014] [Indexed: 11/18/2022] Open
Abstract
Examining the geological past of our planet allows us to study periods of severe climatic and biological crises and recoveries, biotic and abiotic ecosystem fluctuations, and faunal and floral turnovers through time. Furthermore, the recovery dynamics of large predators provide a key for evaluation of the pattern and tempo of ecosystem recovery because predators are interpreted to react most sensitively to environmental turbulences. The end-Permian mass extinction was the most severe crisis experienced by life on Earth, and the common paradigm persists that the biotic recovery from the extinction event was unusually slow and occurred in a step-wise manner, lasting up to eight to nine million years well into the early Middle Triassic (Anisian) in the oceans, and even longer in the terrestrial realm. Here we survey the global distribution and size spectra of Early Triassic and Anisian marine predatory vertebrates (fishes, amphibians and reptiles) to elucidate the height of trophic pyramids in the aftermath of the end-Permian event. The survey of body size was done by compiling maximum standard lengths for the bony fishes and some cartilaginous fishes, and total size (estimates) for the tetrapods. The distribution and size spectra of the latter are difficult to assess because of preservation artifacts and are thus mostly discussed qualitatively. The data nevertheless demonstrate that no significant size increase of predators is observable from the Early Triassic to the Anisian, as would be expected from the prolonged and stepwise trophic recovery model. The data further indicate that marine ecosystems characterized by multiple trophic levels existed from the earliest Early Triassic onwards. However, a major change in the taxonomic composition of predatory guilds occurred less than two million years after the end-Permian extinction event, in which a transition from fish/amphibian to fish/reptile-dominated higher trophic levels within ecosystems became apparent.
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Affiliation(s)
- Torsten M. Scheyer
- Paläontologisches Institut und Museum, Universität Zürich, Zürich, Switzerland
- * E-mail: (TMS); (CR)
| | - Carlo Romano
- Paläontologisches Institut und Museum, Universität Zürich, Zürich, Switzerland
- * E-mail: (TMS); (CR)
| | - Jim Jenks
- West Jordan, Utah, United States of America
- New Mexico Museum of Natural History and Science, Albuquerque, New Mexico, United States of America
| | - Hugo Bucher
- Paläontologisches Institut und Museum, Universität Zürich, Zürich, Switzerland
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22
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Kohno S, Parrott BB, Yatsu R, Miyagawa S, Moore BC, Iguchi T, Guillette L. Gonadal Differentiation in Reptiles Exhibiting Environmental Sex Determination. Sex Dev 2014; 8:208-26. [DOI: 10.1159/000358892] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
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23
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Hernández CE, Rodríguez-Serrano E, Avaria-Llautureo J, Inostroza-Michael O, Morales-Pallero B, Boric-Bargetto D, Canales-Aguirre CB, Marquet PA, Meade A. Using phylogenetic information and the comparative method to evaluate hypotheses in macroecology. Methods Ecol Evol 2013. [DOI: 10.1111/2041-210x.12033] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Cristián E. Hernández
- Laboratorio de Ecología Evolutiva and Filoinformática; Departamento de Zoología; Facultad de Ciencias Naturales y Oceanográficas; Universidad de Concepción; Casilla 160-C; Concepción; Chile
| | - Enrique Rodríguez-Serrano
- Laboratorio de Ecología Evolutiva and Filoinformática; Departamento de Zoología; Facultad de Ciencias Naturales y Oceanográficas; Universidad de Concepción; Casilla 160-C; Concepción; Chile
| | - Jorge Avaria-Llautureo
- Laboratorio de Ecología Evolutiva and Filoinformática; Departamento de Zoología; Facultad de Ciencias Naturales y Oceanográficas; Universidad de Concepción; Casilla 160-C; Concepción; Chile
| | - Oscar Inostroza-Michael
- Laboratorio de Ecología Evolutiva and Filoinformática; Departamento de Zoología; Facultad de Ciencias Naturales y Oceanográficas; Universidad de Concepción; Casilla 160-C; Concepción; Chile
| | - Bryan Morales-Pallero
- Laboratorio de Ecología Evolutiva and Filoinformática; Departamento de Zoología; Facultad de Ciencias Naturales y Oceanográficas; Universidad de Concepción; Casilla 160-C; Concepción; Chile
| | - Dusan Boric-Bargetto
- Laboratorio de Ecología Evolutiva and Filoinformática; Departamento de Zoología; Facultad de Ciencias Naturales y Oceanográficas; Universidad de Concepción; Casilla 160-C; Concepción; Chile
| | - Cristian B. Canales-Aguirre
- Laboratorio de Ecología Evolutiva and Filoinformática; Departamento de Zoología; Facultad de Ciencias Naturales y Oceanográficas; Universidad de Concepción; Casilla 160-C; Concepción; Chile
| | | | - Andrew Meade
- School of Biological Sciences; University of Reading; Reading; Berkshire; RG66BX; UK
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24
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Valenzuela N, Neuwald JL, Literman R. Transcriptional evolution underlying vertebrate sexual development. Dev Dyn 2012; 242:307-19. [DOI: 10.1002/dvdy.23897] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/22/2012] [Indexed: 12/30/2022] Open
Affiliation(s)
- Nicole Valenzuela
- Department of Ecology, Evolution, and Organismal Biology; Iowa State University; Ames; Iowa
| | - Jennifer L. Neuwald
- Department of Ecology, Evolution, and Organismal Biology; Iowa State University; Ames; Iowa
| | - Robert Literman
- Department of Ecology, Evolution, and Organismal Biology; Iowa State University; Ames; Iowa
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25
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Heatwole H, Grech A, Monahan JF, King S, Marsh H. Thermal Biology of Sea Snakes and Sea Kraits1. Integr Comp Biol 2012; 52:257-73. [DOI: 10.1093/icb/ics080] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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26
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St John JA, Braun EL, Isberg SR, Miles LG, Chong AY, Gongora J, Dalzell P, Moran C, Bed'hom B, Abzhanov A, Burgess SC, Cooksey AM, Castoe TA, Crawford NG, Densmore LD, Drew JC, Edwards SV, Faircloth BC, Fujita MK, Greenwold MJ, Hoffmann FG, Howard JM, Iguchi T, Janes DE, Khan SY, Kohno S, de Koning AJ, Lance SL, McCarthy FM, McCormack JE, Merchant ME, Peterson DG, Pollock DD, Pourmand N, Raney BJ, Roessler KA, Sanford JR, Sawyer RH, Schmidt CJ, Triplett EW, Tuberville TD, Venegas-Anaya M, Howard JT, Jarvis ED, Guillette LJ, Glenn TC, Green RE, Ray DA. Sequencing three crocodilian genomes to illuminate the evolution of archosaurs and amniotes. Genome Biol 2012; 13:415. [PMID: 22293439 PMCID: PMC3334581 DOI: 10.1186/gb-2012-13-1-415] [Citation(s) in RCA: 107] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
The International Crocodilian Genomes Working Group (ICGWG) will sequence and assemble the American alligator (Alligator mississippiensis), saltwater crocodile (Crocodylus porosus) and Indian gharial (Gavialis gangeticus) genomes. The status of these projects and our planned analyses are described.
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27
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Nagy LG, Házi J, Szappanos B, Kocsubé S, Bálint B, Rákhely G, Vágvölgyi C, Papp T. The evolution of defense mechanisms correlate with the explosive diversification of autodigesting Coprinellus mushrooms (Agaricales, Fungi). Syst Biol 2012; 61:595-607. [PMID: 22223448 DOI: 10.1093/sysbio/sys002] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Bursts of diversification are known to have contributed significantly to the extant morphological and species diversity, but evidence for many of the theoretical predictions about adaptive radiations have remained contentious. Despite their tremendous diversity, patterns of evolutionary diversification and the contribution of explosive episodes in fungi are largely unknown. Here, using the genus Coprinellus (Psathyrellaceae, Agaricales) as a model, we report the first explosive fungal radiation and infer that the onset of the radiation correlates with a change from a multilayered to a much simpler defense structure on the fruiting bodies. We hypothesize that this change constitutes a key innovation, probably relaxing constraints on diversification imposed by nutritional investment into the development of protective tissues of fruiting bodies. Fossil calibration suggests that Coprinellus mushrooms radiated during the Miocene coinciding with global radiation of large grazing mammals following expansion of dry open grasslands. In addition to diversification rate-based methods, we test the hard polytomy hypothesis, by analyzing the resolvability of internal nodes of the backbone of the putative radiation using Reversible-Jump MCMC. We discuss potential applications and pitfalls of this approach as well as how biologically meaningful polytomies can be distinguished from alignment shortcomings. Our data provide insights into the nature of adaptive radiations in general by revealing a deceleration of morphological diversification through time. The dynamics of morphological diversification was approximated by obtaining the temporal distribution of state changes in discrete traits along the trees and comparing it with the tempo of lineage accumulation. We found that the number of state changes correlate with the number of lineages, even in parts of the tree with short internal branches, and peaks around the onset of the explosive radiation followed by a slowdown, most likely because of the decrease in available niches.
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Affiliation(s)
- László G Nagy
- Department of Microbiology, Faculty of Science and Informatics, University of Szeged, Kozep fasor 52., H-6726 Szeged, Hungary.
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28
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Gomes NMV, Ryder OA, Houck ML, Charter SJ, Walker W, Forsyth NR, Austad SN, Venditt C, Pagel M, Shay JW, Wright WE. Comparative biology of mammalian telomeres: hypotheses on ancestral states and the roles of telomeres in longevity determination. Aging Cell 2011; 10:761-8. [PMID: 21518243 PMCID: PMC3387546 DOI: 10.1111/j.1474-9726.2011.00718.x] [Citation(s) in RCA: 299] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
Progressive telomere shortening from cell division (replicative aging) provides a barrier for human tumor progression. This program is not conserved in laboratory mice, which have longer telomeres and constitutive telomerase. Wild species that do/do not use replicative aging have been reported, but the evolution of different phenotypes and a conceptual framework for understanding their uses of telomeres is lacking. We examined telomeres/telomerase in cultured cells from > 60 mammalian species to place different uses of telomeres in a broad mammalian context. Phylogeny-based statistical analysis reconstructed ancestral states. Our analysis suggested that the ancestral mammalian phenotype included short telomeres (< 20 kb, as we now see in humans) and repressed telomerase. We argue that the repressed telomerase was a response to a higher mutation load brought on by the evolution of homeothermy. With telomerase repressed, we then see the evolution of replicative aging. Telomere length inversely correlated with lifespan, while telomerase expression co-evolved with body size. Multiple independent times smaller, shorter-lived species changed to having longer telomeres and expressing telomerase. Trade-offs involving reducing the energetic/cellular costs of specific oxidative protection mechanisms (needed to protect < 20 kb telomeres in the absence of telomerase) could explain this abandonment of replicative aging. These observations provide a conceptual framework for understanding different uses of telomeres in mammals, support a role for human-like telomeres in allowing longer lifespans to evolve, demonstrate the need to include telomere length in the analysis of comparative studies of oxidative protection in the biology of aging, and identify which mammals can be used as appropriate model organisms for the study of the role of telomeres in human cancer and aging.
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Affiliation(s)
- Nuno M. V. Gomes
- Department of Cell Biology, The University of Texas Southwestern Medical Center, Dallas, TX 75390-9039, USA
- Faculdade de Ciências da Universidade de Lisboa, Lisbon, P-1749-016 Portugal
| | - Oliver A. Ryder
- Conservation and Research for Endangered Species, Genetics Division, Arnold and Mabel Beckman Center for Conservation Research, Escondido, CA 92027, USA
| | - Marlys L. Houck
- Conservation and Research for Endangered Species, Genetics Division, Arnold and Mabel Beckman Center for Conservation Research, Escondido, CA 92027, USA
| | - Suellen J. Charter
- Conservation and Research for Endangered Species, Genetics Division, Arnold and Mabel Beckman Center for Conservation Research, Escondido, CA 92027, USA
| | - William Walker
- Department of Cell Biology, The University of Texas Southwestern Medical Center, Dallas, TX 75390-9039, USA
| | | | - Steven N. Austad
- Barshop Center for Longevity and Aging Studies, San Antonio, TX 78245, USA
| | - Chris Venditt
- School of Biological Sciences, University of Reading, Reading, Berkshire RG6 6BX, UK
| | - Mark Pagel
- School of Biological Sciences, University of Reading, Reading, Berkshire RG6 6BX, UK
- Santa Fe Institute, Santa Fe, NM 87501, USA
| | - Jerry W Shay
- Department of Cell Biology, The University of Texas Southwestern Medical Center, Dallas, TX 75390-9039, USA
| | - Woodring E. Wright
- Department of Cell Biology, The University of Texas Southwestern Medical Center, Dallas, TX 75390-9039, USA
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Chandler CH, Chadderdon GE, Phillips PC, Dworkin I, Janzen FJ. Experimental evolution of the Caenorhabditis elegans sex determination pathway. Evolution 2011; 66:82-93. [PMID: 22220866 DOI: 10.1111/j.1558-5646.2011.01420.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Sex determination is a critical developmental decision with major ecological and evolutionary consequences, yet a large variety of sex determination mechanisms exist and we have a poor understanding of how they evolve. Theoretical and empirical work suggest that compensatory adaptations to mutations in genes involved in sex determination may play a role in the evolution of these pathways. Here, we directly address this problem using experimental evolution in Caenorhabditis elegans lines fixed for a pair of mutations in two key sex-determining genes that jointly render sex determination temperature-sensitive and cause intersexual (but still weakly to moderately fertile) phenotypes at intermediate temperatures. After 50 generations, evolved lines clearly recovered toward wild-type phenotypes. However, changes in transcript levels of key sex-determining genes in evolved lines cannot explain their partially (or in some cases, nearly completely) rescued phenotypes, implying that wild-type phenotypes can be restored independently of the transcriptional effects of these mutations. Our findings highlight the microevolutionary flexibility of sex determination pathways and suggest that compensatory adaptation to mutations can elicit novel and unpredictable evolutionary trajectories in these pathways, mirroring the phylogenetic diversity, and macroevolutionary dynamics of sex determination mechanisms.
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Affiliation(s)
- Christopher H Chandler
- Department of Ecology, Evolution, and Organismal Biology, Iowa State University, Ames, Iowa 50011, USA
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30
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Yusa Y, Yoshikawa M, Kitaura J, Kawane M, Ozaki Y, Yamato S, Høeg JT. Adaptive evolution of sexual systems in pedunculate barnacles. Proc Biol Sci 2011; 279:959-66. [PMID: 21881138 DOI: 10.1098/rspb.2011.1554] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
How and why diverse sexual systems evolve are fascinating evolutionary questions, but few empirical studies have dealt with these questions in animals. Pedunculate (gooseneck) barnacles show such diversity, including simultaneous hermaphroditism, coexistence of dwarf males and hermaphrodites (androdioecy), and coexistence of dwarf males and females (dioecy). Here, we report the first phylogenetically controlled test of the hypothesis that the ultimate cause of the diverse sexual systems and presence of dwarf males in this group is limited mating opportunities for non-dwarf individuals, owing to mating in small groups. Within the pedunculate barnacle phylogeny, dwarf males and females have evolved repeatedly. Females are more likely to evolve in androdioecious than hermaphroditic populations, suggesting that evolution of dwarf males has preceded that of females in pedunculates. Both dwarf males and females are associated with a higher proportion of solitary individuals in the population, corroborating the hypothesis that limited mating opportunities have favoured evolution of these diverse sexual systems, which have puzzled biologists since Darwin.
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Affiliation(s)
- Yoichi Yusa
- Faculty of Science, Nara Women's University, Nara 630-8506, Japan.
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31
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A gravid lizard from the Cretaceous of China and the early history of squamate viviparity. Naturwissenschaften 2011; 98:739-43. [DOI: 10.1007/s00114-011-0820-1] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2011] [Revised: 06/20/2011] [Accepted: 06/22/2011] [Indexed: 10/18/2022]
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33
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Meredith RW, Pires MN, Reznick DN, Springer MS. Molecular phylogenetic relationships and the coevolution of placentotrophy and superfetation in Poecilia (Poeciliidae: Cyprinodontiformes). Mol Phylogenet Evol 2011; 59:148-57. [PMID: 21292015 DOI: 10.1016/j.ympev.2011.01.014] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2010] [Revised: 01/18/2011] [Accepted: 01/27/2011] [Indexed: 10/18/2022]
Abstract
Members of Poeciliidae are used as model organisms for experimental studies on natural and sexual selection, and comparative studies of life-history evolution. The latter have demonstrated multiple origins of both superfetation and placentotrophy within Poeciliidae. Most recently, placentotrophy has been described in five species of Poecilia (Pamphorichthys), but only one of these (P.hasemani) shows evidence of superfetation. Here, we use a molecular phylogeny based on concatenated nuclear and mitochondrial gene sequences to test hypotheses of correlated evolution between superfetation and placentotrophy in Poecilia. Taxon sampling included all species in the subgenera Micropoecilia and Pamphorichthys for which the presence or absence of placentotrophy and superfetation have been determined, as well as representatives of all other Poecilia subgenera (Acanthophacelus, Limia, Mollienesia, Poecilia, Pseudolimia). Phylogenetic analyses were performed with maximum parsimony, maximum likelihood, and Bayesian methods; ancestral states for life-history characters were reconstructed with parsimony and SIMMAP; correlation analyses were performed with SIMMAP; and divergence times were estimated using a relaxed molecular clock. All subgenera in Poecilia were recovered as monophyletic. The basal split in Poecilia is between P. (Acanthophacelus)+P. (Micropoecilia) and the other five subgenera. In the latter clade, P. (Poecilia) is the sister-group to the remaining four subgenera. Within P. (Pamphorichthys), all analyses with the combined data set recovered P. (Pamphorichthys) araguaiensis as the sister taxon to P. (Pamphorichthys) hollandi, and P. (Pamphorichthys) scalpridens as the sister taxon to P. (Pamphorichthys) minor. P. (Pamphorichthys) hasemani was either the sister taxon to P. (Pamphorichthys) hollandi+P. (Pamphorichthys) minor (maximum likelihood, Bayesian) or the sister taxon to all other Pamphorichthys species (maximum parsimony). Ancestral state reconstructions suggest that placentotrophy and superfetation evolved on the same branch in P. (Micropoecilia), whereas placentotrophy evolved before superfetation in P. (Pamphorichthys). SIMMAP analyses indicate a statistically significant association between placentotrophy and superfetation. Within P. (Micropoecilia) both placentotrophy and superfetation evolved in ≤4 million years. Within P. (Pamphorichthys), superfetation evolved in ≤9 million years on the P. (Pamphorichthys) hasemani branch, and placentotrophy evolved in ≤10 million years in the common ancestor of this subgenus.
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Affiliation(s)
- Robert W Meredith
- Department of Biology, University of California, Riverside, CA 92521, USA
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34
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Zanno LE, Makovicky PJ. Herbivorous ecomorphology and specialization patterns in theropod dinosaur evolution. Proc Natl Acad Sci U S A 2011; 108:232-7. [PMID: 21173263 PMCID: PMC3017133 DOI: 10.1073/pnas.1011924108] [Citation(s) in RCA: 149] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Interpreting key ecological parameters, such as diet, of extinct organisms without the benefit of direct observation or explicit fossil evidence poses a formidable challenge for paleobiological studies. To date, dietary categorizations of extinct taxa are largely generated by means of modern analogs; however, for many species the method is subject to considerable ambiguity. Here we present a refined approach for assessing trophic habits in fossil taxa and apply the method to coelurosaurian dinosaurs--a clade for which diet is particularly controversial. Our findings detect 21 morphological features that exhibit statistically significant correlations with extrinsic fossil evidence of coelurosaurian herbivory, such as stomach contents and a gastric mill. These traits represent quantitative, extrinsically founded proxies for identifying herbivorous ecomorphology in fossils and are robust despite uncertainty in phylogenetic relationships among major coelurosaurian subclades. The distribution of these features suggests that herbivory was widespread among coelurosaurians, with six major subclades displaying morphological evidence of the diet, and that contrary to previous thought, hypercarnivory was relatively rare and potentially secondarily derived. Given the potential for repeated, independent evolution of herbivory in Coelurosauria, we also test for repetitive patterns in the appearance of herbivorous traits within sublineages using rank concordance analysis. We find evidence for a common succession of increasing specialization to herbivory in the subclades Ornithomimosauria and Oviraptorosauria, perhaps underlain by intrinsic functional and/or developmental constraints, as well as evidence indicating that the early evolution of a beak in coelurosaurians correlates with an herbivorous diet.
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Affiliation(s)
- Lindsay E Zanno
- Department of Geology, The Field Museum, Chicago, IL 60605, USA.
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35
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Huvet M, Toni T, Sheng X, Thorne T, Jovanovic G, Engl C, Buck M, Pinney JW, Stumpf MPH. The evolution of the phage shock protein response system: interplay between protein function, genomic organization, and system function. Mol Biol Evol 2010; 28:1141-55. [PMID: 21059793 PMCID: PMC3041696 DOI: 10.1093/molbev/msq301] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
Abstract
Sensing the environment and responding appropriately to it are key capabilities for the survival of an organism. All extant organisms must have evolved suitable sensors, signaling systems, and response mechanisms allowing them to survive under the conditions they are likely to encounter. Here, we investigate in detail the evolutionary history of one such system: The phage shock protein (Psp) stress response system is an important part of the stress response machinery in many bacteria, including Escherichia coli K12. Here, we use a systematic analysis of the genes that make up and regulate the Psp system in E. coli in order to elucidate the evolutionary history of the system. We compare gene sharing, sequence evolution, and conservation of protein-coding as well as noncoding DNA sequences and link these to comparative analyses of genome/operon organization across 698 bacterial genomes. Finally, we evaluate experimentally the biological advantage/disadvantage of a simplified version of the Psp system under different oxygen-related environments. Our results suggest that the Psp system evolved around a core response mechanism by gradually co-opting genes into the system to provide more nuanced sensory, signaling, and effector functionalities. We find that recruitment of new genes into the response machinery is closely linked to incorporation of these genes into a psp operon as is seen in E. coli, which contains the bulk of genes involved in the response. The organization of this operon allows for surprising levels of additional transcriptional control and flexibility. The results discussed here suggest that the components of such signaling systems will only be evolutionarily conserved if the overall functionality of the system can be maintained.
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Affiliation(s)
- M Huvet
- Centre for Bioinformatics, Division of Molecular Biosciences, Imperial College London, London, United Kingdom.
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36
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Janes DE, Organ CL, Fujita MK, Shedlock AM, Edwards SV. Genome evolution in Reptilia, the sister group of mammals. Annu Rev Genomics Hum Genet 2010; 11:239-64. [PMID: 20590429 DOI: 10.1146/annurev-genom-082509-141646] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The genomes of birds and nonavian reptiles (Reptilia) are critical for understanding genome evolution in mammals and amniotes generally. Despite decades of study at the chromosomal and single-gene levels, and the evidence for great diversity in genome size, karyotype, and sex chromosome diversity, reptile genomes are virtually unknown in the comparative genomics era. The recent sequencing of the chicken and zebra finch genomes, in conjunction with genome scans and the online publication of the Anolis lizard genome, has begun to clarify the events leading from an ancestral amniote genome--predicted to be large and to possess a diverse repeat landscape on par with mammals and a birdlike sex chromosome system--to the small and highly streamlined genomes of birds. Reptilia exhibit a wide range of evolutionary rates of different subgenomes and, from isochores to mitochondrial DNA, provide a critical contrast to the genomic paradigms established in mammals.
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Affiliation(s)
- Daniel E Janes
- Department of Organismic and Evolutionary Biology, Harvard University, Cambridge, MA 02138, USA
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37
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Charlesworth D, Mank JE. The birds and the bees and the flowers and the trees: lessons from genetic mapping of sex determination in plants and animals. Genetics 2010; 186:9-31. [PMID: 20855574 PMCID: PMC2940314 DOI: 10.1534/genetics.110.117697] [Citation(s) in RCA: 120] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
The ability to identify genetic markers in nonmodel systems has allowed geneticists to construct linkage maps for a diversity of species, and the sex-determining locus is often among the first to be mapped. Sex determination is an important area of study in developmental and evolutionary biology, as well as ecology. Its importance for organisms might suggest that sex determination is highly conserved. However, genetic studies have shown that sex determination mechanisms, and the genes involved, are surprisingly labile. We review studies using genetic mapping and phylogenetic inferences, which can help reveal evolutionary pattern within this lability and potentially identify the changes that have occurred among different sex determination systems. We define some of the terminology, particularly where confusion arises in writing about such a diverse range of organisms, and highlight some major differences between plants and animals, and some important similarities. We stress the importance of studying taxa suitable for testing hypotheses, and the need for phylogenetic studies directed to taxa where the patterns of changes can be most reliably inferred, if the ultimate goal of testing hypotheses regarding the selective forces that have led to changes in such an essential trait is to become feasible.
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Affiliation(s)
- Deborah Charlesworth
- Department of Zoology, Edward Grey Institute, University of Oxford, Oxford OX1 3PS, United Kingdom.
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38
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Pasco-Viel E, Charles C, Chevret P, Semon M, Tafforeau P, Viriot L, Laudet V. Evolutionary trends of the pharyngeal dentition in Cypriniformes (Actinopterygii: Ostariophysi). PLoS One 2010; 5:e11293. [PMID: 20585584 PMCID: PMC2892034 DOI: 10.1371/journal.pone.0011293] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2009] [Accepted: 05/31/2010] [Indexed: 11/19/2022] Open
Abstract
Background The fish order Cypriniformes is one of the most diverse ray-finned fish groups in the world with more than 3000 recognized species. Cypriniformes are characterized by a striking distribution of their dentition: namely the absence of oral teeth and presence of pharyngeal teeth on the last gill arch (fifth ceratobranchial). Despite this limited localisation, the diversity of tooth patterns in Cypriniformes is astonishing. Here we provide a further description of this diversity using X-ray microtomography and we map the resulting dental characters on a phylogenetic tree to explore evolutionary trends. Results We performed a pilot survey of dental formulae and individual tooth shapes in 34 adult species of Cypriniformes by X-ray microtomography (using either conventional X-ray machine, or synchrotron microtomography when necessary) or by dissecting. By mapping morphological results in a phylogenetic tree, it emerges that the two super-families Cobitoidea and Cyprinoidea have followed two distinct evolutionary pathways. Furthermore, our analysis supports the hypothesis of a three-row dentition as ancestral for Cyprinoidea and a general trend in tooth row reduction in most derived lineages. Yet, this general scheme must be considered with caution as several events of tooth row gain and loss have occurred during evolutionary history of Cyprinoidea. Significance Dentition diversity in Cypriniformes constitutes an excellent model to study the evolution of complex morphological structures. This morphological survey clearly advocates for extending the use of X-ray microtomography to study tooth morphology in Cypriniformes. Yet, our survey also underlines that improved knowledge of Cypriniformes life traits, such as feeding habits, is required as current knowledge is not sufficient to conclude on the link between diet and dental morphology.
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Affiliation(s)
- Emmanuel Pasco-Viel
- Evo-devo of Vertebrate Dentition, Institut de Génomique Fonctionnelle de Lyon, Université de Lyon, CNRS, INRA, Ecole Normale Supérieure de Lyon, Lyon, France
| | - Cyril Charles
- iPHEP, CNRS UMR 6046, Université de Poitiers, Poitiers, France
| | - Pascale Chevret
- Molecular Zoology, Institut de Génomique Fonctionnelle de Lyon, Université de Lyon, CNRS, INRA, Ecole Normale Supérieure de Lyon, Lyon, France
| | - Marie Semon
- Molecular Zoology, Institut de Génomique Fonctionnelle de Lyon, Université de Lyon, CNRS, INRA, Ecole Normale Supérieure de Lyon, Lyon, France
| | - Paul Tafforeau
- European Synchrotron Radiation Facility, Grenoble, France
| | - Laurent Viriot
- Evo-devo of Vertebrate Dentition, Institut de Génomique Fonctionnelle de Lyon, Université de Lyon, CNRS, INRA, Ecole Normale Supérieure de Lyon, Lyon, France
- iPHEP, CNRS UMR 6046, Université de Poitiers, Poitiers, France
- * E-mail: (VL); (LV)
| | - Vincent Laudet
- Molecular Zoology, Institut de Génomique Fonctionnelle de Lyon, Université de Lyon, CNRS, INRA, Ecole Normale Supérieure de Lyon, Lyon, France
- * E-mail: (VL); (LV)
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Janes DE, Organ CL, Edwards SV. Variability in sex-determining mechanisms influences genome complexity in reptilia. Cytogenet Genome Res 2010; 127:242-8. [PMID: 20203474 DOI: 10.1159/000293283] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
In this review, we describe the history of amniote sex determination as a classic example of Darwinian evolution. We suggest that evolutionary changes in sex determination provide a foundation for understanding important aspects of chromosome and genome organization that otherwise appear haphazard in their origins and contents. Species with genotypic sex determination often possess heteromorphic sex chromosomes, whereas species with environmental sex determination lack them. Through a series of mutations followed by selection at key genes, sex-determining mechanisms have turned over many times throughout the amniote lineage. As a consequence, amniote genomes have undergone gains or losses of sex chromosomes. We review the genomic and ecological contexts in which either temperature-dependent or genotypic sex determination has evolved. Once genotypic sex determination emerges in a lineage, viviparity and heteromorphic sex chromosomes become more likely to evolve. For example, in extinct marine reptiles, genotypic sex determination apparently led to viviparity, which in turn facilitated their pelagic radiation. Sex chromosomes comprise genome regions that differ from autosomes in recombination rate, mutation rate, levels of polymorphism, and the presence of sex-determining and sexually antagonistic genes. In short, many aspects of amniote genome complexity, life history, and adaptive radiation appear contingent on evolutionary changes in sex-determining mechanisms.
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Affiliation(s)
- D E Janes
- Department of Organismic and Evolutionary Biology, Harvard University, Cambridge, MA 02138, USA.
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40
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Erratum: Genotypic sex determination enabled adaptive radiations of extinct marine reptiles. Nature 2009. [DOI: 10.1038/nature08523] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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