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Yildirim Y, Kristensson D, Outomuro D, Mikolajewski D, Rödin Mörch P, Sniegula S, Johansson F. Phylogeography and phenotypic wing shape variation in a damselfly across populations in Europe. BMC Ecol Evol 2024; 24:19. [PMID: 38308224 PMCID: PMC10838002 DOI: 10.1186/s12862-024-02207-4] [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: 04/05/2023] [Accepted: 01/25/2024] [Indexed: 02/04/2024] Open
Abstract
BACKGROUND Describing geographical variation in morphology of organisms in combination with data on genetic differentiation and biogeography can provide important information on how natural selection shapes such variation. Here we study genetic structure using ddRAD seq and wing shape variation using geometric morphometrics in 14 populations of the damselfly Lestes sponsa along its latitudinal range in Europe. RESULTS The genetic analysis showed a significant, yet relatively weak population structure with high genetic heterozygosity and low inbreeding coefficients, indicating that neutral processes contributed very little to the observed wing shape differences. The genetic analysis also showed that some regions of the genome (about 10%) are putatively shaped by selection. The phylogenetic analysis showed that the Spanish and French populations were the ancestral ones with northern Swedish and Finnish populations being the most derived ones. We found that wing shape differed significantly among populations and showed a significant quadratic (but weak) relationship with latitude. This latitudinal relationship was largely attributed to allometric effects of wing size, but non-allometric variation also explained a portion of this relationship. However, wing shape showed no phylogenetic signal suggesting that lineage-specific variation did not contribute to the variation along the latitudinal gradient. In contrast, wing size, which is correlated with body size in L. sponsa, had a strong negative correlation with latitude. CONCLUSION Our results suggest a relatively weak population structure among the sampled populations across Europe, but a clear differentiation between south and north populations. The observed geographic phenotypic variation in wing shape may have been affected by different local selection pressures or environmental effects.
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Affiliation(s)
- Y Yildirim
- Department of Ecology and Genetics, Animal Ecology, Uppsala University, Uppsala, Sweden
| | - D Kristensson
- Department of Ecology and Genetics, Animal Ecology, Uppsala University, Uppsala, Sweden
| | - D Outomuro
- Department of Biological Sciences, University of Pittsburgh, Pittsburgh, PA, USA
| | - D Mikolajewski
- Institut für Biologie, Freie Universität Berlin, Berlin, Germany
| | - P Rödin Mörch
- Department of Ecology and Genetics, Animal Ecology, Uppsala University, Uppsala, Sweden
| | - S Sniegula
- Department of Ecosystem Conservation, Institute of Nature Conservation, Polish Academy of Sciences, Kraków, Poland
| | - F Johansson
- Department of Ecology and Genetics, Animal Ecology, Uppsala University, Uppsala, Sweden.
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Johansson F, Berger D, Outomuro D, Sniegula S, Tunon M, Watts PC, Rohner PT. Mixed support for an alignment between phenotypic plasticity and genetic differentiation in damselfly wing shape. J Evol Biol 2023; 36:368-380. [PMID: 36571263 PMCID: PMC10107333 DOI: 10.1111/jeb.14145] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2022] [Revised: 09/28/2022] [Accepted: 11/18/2022] [Indexed: 12/27/2022]
Abstract
The relationship between genetic differentiation and phenotypic plasticity can provide information on whether plasticity generally facilitates or hinders adaptation to environmental change. Here, we studied wing shape variation in a damselfly (Lestes sponsa) across a latitudinal gradient in Europe that differed in time constraints mediated by photoperiod and temperature. We reared damselflies from northern and southern populations in the laboratory using a reciprocal transplant experiment that simulated time-constrained (i.e. northern) and unconstrained (southern) photoperiods and temperatures. After emergence, adult wing shape was analysed using geometric morphometrics. Wings from individuals in the northern and southern populations differed significantly in shape when animals were reared in their respective native environment. Comparing wing shape across environments, we found evidence for phenotypic plasticity in wing shape, and this response differed across populations (i.e. G × E interactions). This interaction was driven by a stronger plastic response by individuals from the northern population and differences in the direction of plastic wing shape changes among populations. The alignment between genetic and plastic responses depended on the specific combination of population and rearing environment. For example, there was an alignment between plasticity and genetic differentiation under time-constrained, but not under non-time-constrained conditions for forewings. We thus find mixed support for the hypothesis that environmental plasticity and genetic population differentiation are aligned. Furthermore, although our laboratory treatments mimicked the natural climatic conditions at northern and southern latitudes, the effects of population differences on wing shape were two to four times stronger than plastic effects. We discuss our results in terms of time constraints and the possibility that natural and sexual selection is acting differently on fore- and hindwings.
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Affiliation(s)
- Frank Johansson
- Department of Ecology and Genetics, Animal Ecology, Uppsala University, Uppsala, Sweden
| | - David Berger
- Department of Ecology and Genetics, Animal Ecology, Uppsala University, Uppsala, Sweden
| | - David Outomuro
- Department of Biological Sciences, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Szymon Sniegula
- Department of Ecosystem Conservation, Institute of Nature Conservation, Polish Academy of Sciences, Warsaw, Poland
| | - Meagan Tunon
- Department of Ecology and Genetics, Animal Ecology, Uppsala University, Uppsala, Sweden
| | - Phillip C Watts
- Department of Biological and Environmental Science, University of Jyväskylä, Jyväskylä, Finland
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Gigena GV, Rodríguez CS, Fiad FG, Hernández ML, Carbajal-de-la-Fuente AL, Piccinali RV, Sánchez Casaccia P, Rojas de Arias A, Lobbia P, Abrahan L, Bustamante Gomez M, Espinoza J, Cano F, Nattero J. Phenotypic variability in traits related to flight dispersal in the wing dimorphic species Triatoma guasayana. Parasit Vectors 2023; 16:8. [PMID: 36624528 PMCID: PMC9830765 DOI: 10.1186/s13071-022-05570-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2022] [Accepted: 11/02/2022] [Indexed: 01/11/2023] Open
Abstract
BACKGROUND Triatoma guasayana is considered an emerging vector of Chagas disease in the Southern Cone of South America. The presence of a triatomine population with brachypterous individuals, in which both wings are reduced, has recently been reported for this species. The aim of the present study was to determine if flight-related traits varied across populations, if these traits could explain differences in flight capacity across populations and if flight-related traits are associated with geographic and/or climatic variation. METHODS The study involved 66 male T. guasayana specimens from 10 triatomine populations. Digital images of wing, head and pronotum were used to estimate linear and geometric morphometric variables. Variations in size and shape were analysed using one-way analysis of variance and canonical variate analysis (CVA), respectively. Mantel tests were applied to analyse the relationship between morphometric and geographic distances, and the association between size measurements was analysed using Pearson's correlation. We explored covariation between size and shape variables using partial least square analyses (PLS). The association of geographic and climatic variables with size measurements was tested using linear regression analyses. We performed PLS analyses for shape measurements. RESULTS Wing size differed significantly across triatomine populations. The CVA showed that wing shape of the brachypterous population is well discriminated from that of the other populations. The Mantel test showed a positive and significant association between wing shape and geographic distances. The heads of the brachypterous population were significantly larger than those of the other populations. Similar to wing shape, the head shape of the brachypterous population was well discriminated from those of the other populations. Pronotum width did not show significant differences across populations. Geographic and climatic factors were associated with size and shape of both the wing and head, but not with pronotum width. CONCLUSIONS Most of the traits related to flight dispersal varied across populations. Wing shape and head shape were found to be better markers for differentiated morphological variation across populations. Head measurements also varied in accordance with this condition. Geographic and climatic variables were associated with most of the flight-related traits.
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Affiliation(s)
- Gisel V. Gigena
- grid.423606.50000 0001 1945 2152Cátedras de Morfología Animal y de Introducción a la Biología, Instituto de Investigaciones Biológicas y Tecnológicas (IIByT), Facultad de Ciencias Exactas Físicas y Naturales, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)/Universidad Nacional de Córdoba, Av. Vélez Sársfield 299, X5000JJC Córdoba, Argentina
| | - Claudia S. Rodríguez
- grid.423606.50000 0001 1945 2152Cátedras de Morfología Animal y de Introducción a la Biología, Instituto de Investigaciones Biológicas y Tecnológicas (IIByT), Facultad de Ciencias Exactas Físicas y Naturales, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)/Universidad Nacional de Córdoba, Av. Vélez Sársfield 299, X5000JJC Córdoba, Argentina
| | - Federico G. Fiad
- grid.423606.50000 0001 1945 2152Cátedras de Morfología Animal y de Introducción a la Biología, Instituto de Investigaciones Biológicas y Tecnológicas (IIByT), Facultad de Ciencias Exactas Físicas y Naturales, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)/Universidad Nacional de Córdoba, Av. Vélez Sársfield 299, X5000JJC Córdoba, Argentina
| | - María Laura Hernández
- grid.423606.50000 0001 1945 2152Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina ,Unidad Operativa de Vectores y Ambiente (UnOVE), Administración Nacional de Laboratorios e Institutos de Salud “Dr. Carlos Malbrán, Centro Nacional de Diagnóstico e Investigación en Endemo-Epidemias (CeNDIE), Santa María de Punilla, Córdoba, Argentina
| | - Ana Laura Carbajal-de-la-Fuente
- grid.419202.c0000 0004 0433 8498Centro Nacional de Diagnóstico e Investigación en Endemo-Epidemias (CeNDIE), Administración Nacional de Laboratorios e Institutos de Salud “Dr. Carlos Malbrán” (ANLIS), Av. Paseo Colón 568, Buenos Aires, Argentina
| | - Romina V. Piccinali
- grid.7345.50000 0001 0056 1981Departamento de Ecología Genética y Evolución, Laboratorio de Eco-Epidemiología, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Intendente Güiraldes 2160, Ciudad Universitaria, Pabellón 2, C1428EGA Ciudad Autónoma de Buenos Aires, Argentina ,grid.7345.50000 0001 0056 1981Instituto de Ecología, Genética y Evolución (IEGEBA), Intendente Güiraldes, CONICET/Universidad de Buenos Aires, 2160, Ciudad Universitaria, Pabellón 2, C1428EGA Ciudad Autónoma de Buenos Aires, Argentina
| | - Paz Sánchez Casaccia
- grid.419202.c0000 0004 0433 8498Centro Nacional de Diagnóstico e Investigación en Endemo-Epidemias (CeNDIE), Administración Nacional de Laboratorios e Institutos de Salud “Dr. Carlos Malbrán” (ANLIS), Av. Paseo Colón 568, Buenos Aires, Argentina ,Centro para el Desarrollo de la Investigación Científica (CEDIC), Manduvirá 635 entre 15 de agosto y Oleary, Asunción, Paraguay
| | - Antonieta Rojas de Arias
- Centro para el Desarrollo de la Investigación Científica (CEDIC), Manduvirá 635 entre 15 de agosto y Oleary, Asunción, Paraguay
| | - Patricia Lobbia
- grid.423606.50000 0001 1945 2152Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina ,Unidad Operativa de Vectores y Ambiente (UnOVE), Administración Nacional de Laboratorios e Institutos de Salud “Dr. Carlos Malbrán, Centro Nacional de Diagnóstico e Investigación en Endemo-Epidemias (CeNDIE), Santa María de Punilla, Córdoba, Argentina
| | - Luciana Abrahan
- grid.507426.2Centro Regional de Investigaciones Científicas y Transferencia Tecnológica de La Rioja (CRILAR), UNLAR, SEGEMAR, UNCa, CONICET, Entre Ríos y Mendoza S/N, Anillaco , 5301 La Rioja, Provincia de La Rioja Argentina
| | - Marinely Bustamante Gomez
- grid.441790.f0000 0004 0489 2878Departamento de Apoyo y Asesoramiento a Proyectos, Universidad Privada del Valle, Campus Tiquipaya, Cochabamba, Bolivia
| | - Jorge Espinoza
- grid.10491.3d0000 0001 2176 4059Departamento de Biología, Laboratorio de Entomología Médica, Universidad Mayor de San Simón, Cochabamba, Bolivia
| | - Florencia Cano
- Programa de Control de Vectores, Ministerio de Salud Pública de San Juan, San Juan, Argentina
| | - Julieta Nattero
- grid.7345.50000 0001 0056 1981Departamento de Ecología Genética y Evolución, Laboratorio de Eco-Epidemiología, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Intendente Güiraldes 2160, Ciudad Universitaria, Pabellón 2, C1428EGA Ciudad Autónoma de Buenos Aires, Argentina ,grid.7345.50000 0001 0056 1981Instituto de Ecología, Genética y Evolución (IEGEBA), Intendente Güiraldes, CONICET/Universidad de Buenos Aires, 2160, Ciudad Universitaria, Pabellón 2, C1428EGA Ciudad Autónoma de Buenos Aires, Argentina
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Jahant-Miller C, Miller R, Parry D. Size-dependent flight capacity and propensity in a range-expanding invasive insect. INSECT SCIENCE 2022; 29:879-888. [PMID: 34351047 DOI: 10.1111/1744-7917.12950] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2021] [Revised: 06/28/2021] [Accepted: 07/13/2021] [Indexed: 06/13/2023]
Abstract
For capital-breeding insects, all resources available for adult metabolic needs are accumulated during larval feeding. Therefore, body size at adult eclosion represents the total energetic capacity of the individual. For female capital breeders, body size is strongly correlated with lifetime fecundity, while in males, body size, which correlates with fitness, is less understood. In capital-breeding species with wingless, flightless, or dispersal-limited females, flight potential for male Lepidoptera has important implications for mate-finding and may be correlated with body size. At low population densities, failure to mate has been identified as an important Allee effect and can drive the success or failure of invasive species at range edges and in species of conservation concern. Th capital-breeding European subspecies of Lymantria dispar (L.), was introduced to North America in 1869 and now ranges across much of eastern North America. In L. dispar, females are flightless and mate-finding is entirely performed by males. We quantified male L. dispar flight capacity and propensity relative to morphological and physiological characteristics using fixed-arm flight mills. A range of male body sizes was produced by varying the protein content of standard artificial diets while holding other dietary components constant. Wing length, a proxy for body size, relative thorax mass, and forewing aspect were all important predictors of total flight distance and maximum speed. These results have important implications for mate-finding and invasion dynamics in L. dispar and may apply broadly to other capital-breeding insects.
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Affiliation(s)
- Chelsea Jahant-Miller
- Forest Health Protection, U.S. Forest Service, Coeur d'Alene, ID, 83815, USA
- Department of Environmental and Forest Biology, College of Environmental Science and Forestry, State University of New York, Syracuse, NY, 13210, USA
| | - Russell Miller
- School for Environment and Sustainability, Cooperative Institute for Great Lakes Research, University of Michigan, Ann Arbor, MI, 48106, USA
| | - Dylan Parry
- Department of Environmental and Forest Biology, College of Environmental Science and Forestry, State University of New York, Syracuse, NY, 13210, USA
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Walters RJ, Berger D, Blanckenhorn WU, Bussière LF, Rohner PT, Jochmann R, Thüler K, Schäfer MA. Growth rate mediates hidden developmental plasticity of female yellow dung fly reproductive morphology in response to environmental stressors. Evol Dev 2022; 24:3-15. [PMID: 35072984 PMCID: PMC9285807 DOI: 10.1111/ede.12396] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2021] [Revised: 10/19/2021] [Accepted: 11/24/2021] [Indexed: 01/08/2023]
Abstract
Understanding how environmental variation influences even cryptic traits is important to clarify the roles of selection and developmental constraints in past evolutionary divergence and to predict future adaptation under environmental change. Female yellow dung flies (Scathophaga stercoraria) typically have three sperm storage compartments (3S), but occasionally four (4S). More spermathecae are thought to be a female adaptation facilitating sperm sorting after mating, but the phenotype is very rare in nature. We manipulated the flies' developmental environment by food restriction, pesticides, and hot temperatures to investigate the nature and extent of developmental plasticity of this trait, and whether spermatheca expression correlates with measures of performance and developmental stability, as would be expected if 4S expression is a developmental aberration. The spermathecal polymorphism of yellow dung fly females is heritable, but also highly developmentally plastic, varying strongly with rearing conditions. 4S expression is tightly linked to growth rate, and weakly positively correlated with fluctuating asymmetry of wings and legs, suggesting that the production of a fourth spermatheca could be a nonadaptive developmental aberration. However, spermathecal plasticity is opposite in the closely related and ecologically similar Scathophaga suilla, demonstrating that overexpression of spermathecae under developmental stress is not universal. At the same time, we found overall mortality costs as well as benefits of 4S pheno‐ and genotypes (also affecting male siblings), suggesting that a life history trade‐off may potentially moderate 4S expression. We conclude that the release of cryptic genetic variation in spermatheca number in the face of strong environmental variation may expose hidden traits (here reproductive morphology) to natural selection (here under climate warming or food augmentation). Once exposed, hidden traits can potentially undergo rapid genetic assimilation, even in cases when trait changes are first triggered by random errors that destabilize developmental processes. Female yellow dung flies naturally vary in number of sperm storage compartments (3S or 4S). This spermathecal polymorphism is strongly heritable but also developmentally plastic. 4S expression is linked to growth rate and weakly correlated with fluctuating asymmetry, so potentially a developmental aberration. There are mortality costs as well as benefits for 4S phenotypes, suggesting adaptive life‐history trade‐offs. Spermathecal plasticity differs in the closely related and ecologically similar Scathophaga suilla. Environmental changes can expose hidden traits with initially no function to natural selection.
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Affiliation(s)
- Richard J. Walters
- Department of Evolutionary Biology and Environmental Studies University of Zurich Zurich Switzerland
- Centre for Environmental and Climate Research Lund University Lund Sweden
| | - David Berger
- Department of Evolutionary Biology and Environmental Studies University of Zurich Zurich Switzerland
- Evolutionary Biology Centre University of Uppsala Uppsala Sweden
| | - Wolf U. Blanckenhorn
- Department of Evolutionary Biology and Environmental Studies University of Zurich Zurich Switzerland
| | - Luc F. Bussière
- Department of Evolutionary Biology and Environmental Studies University of Zurich Zurich Switzerland
- Biological and Environmental Sciences University of Stirling Stirling Scotland UK
- Biology and Environmental Sciences University of Gothenburg Gothenburg Sweden
| | - Patrick T. Rohner
- Department of Evolutionary Biology and Environmental Studies University of Zurich Zurich Switzerland
- Department of Biology Indiana University Bloomington Indiana USA
| | - Ralf Jochmann
- Department of Evolutionary Biology and Environmental Studies University of Zurich Zurich Switzerland
| | - Karin Thüler
- Department of Evolutionary Biology and Environmental Studies University of Zurich Zurich Switzerland
| | - Martin A. Schäfer
- Department of Evolutionary Biology and Environmental Studies University of Zurich Zurich Switzerland
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Blanckenhorn WU, Berger D, Rohner PT, Schäfer MA, Akashi H, Walters RJ. Comprehensive thermal performance curves for yellow dung fly life history traits and the temperature-size-rule. J Therm Biol 2021; 100:103069. [PMID: 34503806 DOI: 10.1016/j.jtherbio.2021.103069] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2021] [Revised: 07/27/2021] [Accepted: 08/03/2021] [Indexed: 10/20/2022]
Abstract
Ambient temperature strongly determines the behaviour, physiology, and life history of all organisms. The technical assessment of organismal thermal niches in form of now so-called thermal performance curves (TPC) thus has a long tradition in biological research. Nevertheless, several traits do not display the idealized, intuitive dome-shaped TPC, and in practice assessments often do not cover the entire realistic or natural temperature range of an organism. We here illustrate this by presenting comprehensive sex-specific TPCs for the major (juvenile) life history traits of yellow dung flies (Scathophaga stercoraria; Diptera: Scathophagidae). This concerns estimation of prominent biogeographic rules, such as the temperature-size-rule (TSR), the common phenomenon in ectothermic organisms that body size decreases as temperature increases. S. stercoraria shows an untypical asymptotic TPC of continuous body size increase with decreasing temperature without a peak (optimum), thus following the TSR throughout their entire thermal range (unlike several other insects presented here). Egg-to-adult mortality (our best fitness estimator) also shows no intermediate maximum. Both may relate to this fly entering pupal winter diapause below 12 °C. While development time presents a negative exponential relationship with temperature, development rate and growth rate typify the classic TPC form for this fly. The hitherto largely unexplored close relative S. suilla with an even more arctic distribution showed very similar responses, demonstrating large overlap among two ecologically similar, coexisting dung fly species, thus implying limited utility of even complete TPCs for predicting species distribution and coexistence.
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Affiliation(s)
- Wolf U Blanckenhorn
- Department of Evolutionary Biology and Environmental Studies, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland.
| | - David Berger
- Department of Evolutionary Biology and Environmental Studies, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland; Evolutionary Biology Centre, University of Uppsala, Norbyvägen 18D, S-752 36, Uppsala, Sweden
| | - Patrick T Rohner
- Department of Evolutionary Biology and Environmental Studies, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland; Department of Biology, Indiana University, Bloomington, IN, 47405, USA
| | - Martin A Schäfer
- Department of Evolutionary Biology and Environmental Studies, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
| | - Hiroshi Akashi
- Department of Evolutionary Biology and Environmental Studies, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland; Department of Biological Science and Technology, Tokyo University of Science, Tokyo, 125-8585, Japan
| | - Richard J Walters
- Department of Evolutionary Biology and Environmental Studies, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland; Centre for Environmental and Climate Research, Lund University, Sweden
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Blanckenhorn WU, Baur J, Roy J, Puniamoorthy N, Busso JP, Schäfer MA, Rohner PT. Comparative sexual selection in field and laboratory in a guild of sepsid dung flies. Anim Behav 2021. [DOI: 10.1016/j.anbehav.2021.03.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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8
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Morphological differentiation across the invasive range in Senecio madagascariensis populations. Sci Rep 2020; 10:20045. [PMID: 33208830 PMCID: PMC7674477 DOI: 10.1038/s41598-020-76922-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2020] [Accepted: 09/17/2020] [Indexed: 11/08/2022] Open
Abstract
Invasive species are characterized by their ability to colonize new habitats and establish populations away from their native range. In this sense, these plants are expected to have plastic responses to adapt to the environmental pressures during the invasion process. Hence, the role of natural selection is essential because it might favor the occurrence of advantageous traits. However, gene flow can counteract natural selection because immigrants introduce genes adapted to different conditions, with these introductions tending to homogenize allelic frequencies. In this work, we explore the effect of natural selection in invasive populations of S. madagascariensis in Argentina. We quantified leaf area, head number, and length of internodes and inflorescence from material spanning 54 years (1962–2016) and then compared between the edge versus established ranges. Our results show differences in all the measured plant traits among the sampled areas. However, only leaf area was statistically significant, which evidences different responses under the same environmental pressures in the areas located in the edge and established ranges. On the other hand, unlike homogeneous areas, the areas characterized by phenotypically diverse individuals were related to higher dispersal ability. In this sense, long-distance dispersal between neighboring areas may have had an important role in the recorded values. Furthermore, the implications of natural selection and founder effect in the invasion of S. madagascariensis are discussed.
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9
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Rohner PT, Moczek AP. Rapid differentiation of plasticity in life history and morphology during invasive range expansion and concurrent local adaptation in the horned beetle
Onthophagus taurus. Evolution 2020; 74:2059-2072. [DOI: 10.1111/evo.14045] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2020] [Revised: 06/06/2020] [Accepted: 06/16/2020] [Indexed: 01/06/2023]
Affiliation(s)
| | - Armin P. Moczek
- Department of Biology Indiana University Bloomington Indiana 47405
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10
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Rohner PT. Evolution of multivariate wing allometry in schizophoran flies (Diptera: Schizophora). J Evol Biol 2020; 33:831-841. [PMID: 32145126 PMCID: PMC7318208 DOI: 10.1111/jeb.13613] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2019] [Revised: 02/27/2020] [Accepted: 03/02/2020] [Indexed: 01/12/2023]
Abstract
The proximate and ultimate mechanisms underlying scaling relationships as well as their evolutionary consequences remain an enigmatic issue in evolutionary biology. Here, I investigate the evolution of wing allometries in the Schizophora, a group of higher Diptera that radiated about 65 million years ago, by studying static allometries in five species using multivariate approaches. Despite the vast ecological diversity observed in contemporary members of the Schizophora and independent evolutionary histories throughout most of the Cenozoic, size-related changes represent a major contributor to overall variation in wing shape, both within and among species. Static allometries differ between species and sexes, yet multivariate allometries are correlated across species, suggesting a shared developmental programme underlying size-dependent phenotypic plasticity. Static allometries within species also correlate with evolutionary divergence across 33 different families (belonging to 11 of 13 superfamilies) of the Schizophora. This again points towards a general developmental, genetic or evolutionary mechanism that canalizes or maintains the covariation between shape and size in spite of rapid ecological and morphological diversification during the Cenozoic. I discuss the putative roles of developmental constraints and natural selection in the evolution of wing allometry in the Schizophora.
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11
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Crabtree JR, Macagno ALM, Moczek AP, Rohner PT, Hu Y. Notch signaling patterns head horn shape in the bull-headed dung beetle Onthophagus taurus. Dev Genes Evol 2020; 230:213-225. [PMID: 31960122 DOI: 10.1007/s00427-020-00645-w] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2019] [Accepted: 01/14/2020] [Indexed: 02/07/2023]
Abstract
Size and shape constitute fundamental aspects in the description of morphology. Yet while the developmental-genetic underpinnings of trait size, in particular with regard to scaling relationships, are increasingly well understood, those of shape remain largely elusive. Here we investigate the potential function of the Notch signaling pathway in instructing the shape of beetle horns, a highly diversified and evolutionarily novel morphological structure. We focused on the bull-headed dung beetle Onthophagus taurus due to the wide range of horn sizes and shapes present among males in this species, in order to assess the potential function of Notch signaling in the specification of horn shape alongside the regulation of shape changes with allometry. Using RNA interference-mediated transcript depletion of Notch and its ligands, we document a highly conserved role of Notch signaling in general appendage formation. By integrating our functional genetic approach with a geometric morphometric analysis, we find that Notch signaling moderately but consistently affects horn shape, and does so differently for the horns of minor, intermediate-sized, and major males. Our results suggest that the function of Notch signaling during head horn formation may vary in a complex manner across male morphs, and highlights the power of integrating functional genetic and geometric morphometric approaches in analyzing subtle but nevertheless biologically important phenotypes in the face of significant allometric variation.
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Affiliation(s)
- Jordan R Crabtree
- Department of Biology, Indiana University, Bloomington, IN, 47405, USA
| | - Anna L M Macagno
- Department of Biology, Indiana University, Bloomington, IN, 47405, USA
| | - Armin P Moczek
- Department of Biology, Indiana University, Bloomington, IN, 47405, USA
| | - Patrick T Rohner
- Department of Biology, Indiana University, Bloomington, IN, 47405, USA
| | - Yonggang Hu
- Department of Biology, Indiana University, Bloomington, IN, 47405, USA.
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12
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Allen PE, Laforest L, Diyaljee SI, Smith HM, Tran DX, Winsor AM, Dale AG. Long-term changes in mole cricket body size associated with enemy-free space and a novel range. Biol Invasions 2019. [DOI: 10.1007/s10530-019-02127-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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13
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Baur J, Roy J, Schäfer MA, Puniamoorthy N, Blanckenhorn WU, Rohner PT. Intraspecific mating system evolution and its effect on complex male secondary sexual traits: Does male-male competition increase selection on size or shape? J Evol Biol 2019; 33:297-308. [PMID: 31701605 DOI: 10.1111/jeb.13565] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2019] [Accepted: 10/31/2019] [Indexed: 12/23/2022]
Abstract
Sexual selection is generally held responsible for the exceptional diversity in secondary sexual traits in animals. Mating system evolution is therefore expected to profoundly affect the covariation between secondary sexual traits and mating success. Whereas there is such evidence at the interspecific level, data within species remain scarce. We here investigate sexual selection acting on the exaggerated male fore femur and the male wing in the common and widespread dung flies Sepsis punctum and S. neocynipsea (Diptera: Sepsidae). Both species exhibit intraspecific differences in mating systems and variation in sexual size dimorphism (SSD) across continents that correlates with the extent of male-male competition. We predicted that populations subject to increased male-male competition will experience stronger directional selection on the sexually dimorphic male foreleg. Our results suggest that fore femur size, width and shape were indeed positively associated with mating success in populations with male-biased SSD in both species, which was not evident in conspecific populations with female-biased SSD. However, this was also the case for wing size and shape, a trait often assumed to be primarily under natural selection. After correcting for selection on overall body size by accounting for allometric scaling, we found little evidence for independent selection on any of these size or shape traits in legs or wings, irrespective of the mating system. Sexual dimorphism and (foreleg) trait exaggeration is therefore unlikely to be driven by direct precopulatory sexual selection, but more so by selection on overall size or possibly selection on allometric scaling.
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Affiliation(s)
- Julian Baur
- Department of Evolutionary Biology and Environmental Studies, University of Zurich, Zürich, Switzerland.,Uppsala Universitet, Institute for Ecology and Genetics; Animal Ecology, Uppsala, Sweden
| | - Jeannine Roy
- Department of Evolutionary Biology and Environmental Studies, University of Zurich, Zürich, Switzerland
| | - Martin A Schäfer
- Department of Evolutionary Biology and Environmental Studies, University of Zurich, Zürich, Switzerland
| | - Nalini Puniamoorthy
- Department of Biological Science, National University of Singapore, Singapore City, Singapore
| | - Wolf U Blanckenhorn
- Department of Evolutionary Biology and Environmental Studies, University of Zurich, Zürich, Switzerland
| | - Patrick T Rohner
- Department of Evolutionary Biology and Environmental Studies, University of Zurich, Zürich, Switzerland.,Department of Biology, Indiana University, Bloomington, IN, USA
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14
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Günter F, Beaulieu M, Brunetti M, Lange L, Schmitz Ornés A, Fischer K. Latitudinal and altitudinal variation in ecologically important traits in a widespread butterfly. Biol J Linn Soc Lond 2019. [DOI: 10.1093/biolinnean/blz133] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
Abstract
Understanding how organisms adapt to complex environments lies at the very heart of evolutionary biology and ecology, and is of particular concern in the current era of anthropogenic global change. Variation in ecologically important traits associated with environmental gradients is considered to be strong evidence for adaptive responses. Here, we study phenotypic variation along a latitudinal and an altitudinal cline in 968 field-collected males of the widespread European butterfly Pieris napi. In contrast to our expectations, body size decreased with increasing latitude and altitude, suggesting that warmer rather than cooler conditions may be more beneficial for individual development in this species. Higher altitudes but not latitudes seemed to be associated with increased flight performance, suggesting stronger challenges for flight activity in high-altitude environments (e.g. due to strong wind). Moreover, wing melanization increased while yellow reflectance decreased towards colder environments in both clines. Thus, increased melanization under thermally challenging conditions seems to compromise investment into a sexually selected trait, resulting in a trade-off. Our study, although exclusively based on field-collected males, revealed indications of adaptive patterns along geographical clines. It documents the usefulness of field-collected specimens, and the strength of comparing latitudinal and altitudinal clines to identify traits being potentially under thermal selection.
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Affiliation(s)
- Franziska Günter
- Zoological Institute and Museum, Greifswald University, Greifswald, Germany
| | - Michaël Beaulieu
- Zoological Institute and Museum, Greifswald University, Greifswald, Germany
| | - Massimo Brunetti
- Zoological Institute and Museum, Greifswald University, Greifswald, Germany
| | - Lena Lange
- Zoological Institute and Museum, Greifswald University, Greifswald, Germany
| | | | - Klaus Fischer
- Zoological Institute and Museum, Greifswald University, Greifswald, Germany
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15
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Csilléry K, Ovaskainen O, Sperisen C, Buchmann N, Widmer A, Gugerli F. Adaptation to local climate in multi-trait space: evidence from silver fir (Abies alba Mill.) populations across a heterogeneous environment. Heredity (Edinb) 2019; 124:77-92. [PMID: 31182819 DOI: 10.1038/s41437-019-0240-0] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2019] [Revised: 05/08/2019] [Accepted: 05/22/2019] [Indexed: 01/13/2023] Open
Abstract
Heterogeneous environments, such as mountainous landscapes, create spatially varying selection pressure that potentially affects several traits simultaneously across different life stages, yet little is known about the general patterns and drivers of adaptation in such complex settings. We studied silver fir (Abies alba Mill.) populations across Switzerland and characterized its mountainous landscape using downscaled historical climate data. We sampled 387 trees from 19 populations and genotyped them at 374 single-nucleotide polymorphisms (SNPs) to estimate their demographic distances. Seedling morphology, growth and phenology traits were recorded in a common garden, and a proxy for water use efficiency was estimated for adult trees. We tested whether populations have more strongly diverged at quantitative traits than expected based on genetic drift alone in a multi-trait framework, and identified potential environmental drivers of selection. We found two main responses to selection: (i) populations from warmer and more thermally stable locations have evolved towards a taller stature, and (ii) the growth timing of populations evolved towards two extreme strategies, 'start early and grow slowly' or 'start late and grow fast', driven by precipitation seasonality. Populations following the 'start early and grow slowly' strategy had higher water use efficiency and came from inner Alpine valleys characterized by pronounced summer droughts. Our results suggest that contrasting adaptive life-history strategies exist in silver fir across different life stages (seedling to adult), and that some of the characterized populations may provide suitable seed sources for tree growth under future climatic conditions.
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Affiliation(s)
- Katalin Csilléry
- Center for Adaptation to a Changing Environment, Institute of Integrative Biology, ETH Zurich, Zurich, Switzerland. .,Swiss Federal Research Institute WSL, Birmensdorf, Switzerland. .,Department of Evolutionary Biology and Environmental Studies, University of Zurich, Zurich, Switzerland.
| | - Otso Ovaskainen
- Faculty of Biological and Environmental Sciences, University of Helsinki, Helsinki, Finland.,Centre for Biodiversity Dynamics, Department of Biology, Norwegian University of Science and Technology, Trondheim, Norway
| | | | - Nina Buchmann
- Institute of Agricultural Sciences, ETH Zurich, Zurich, Switzerland
| | - Alex Widmer
- Institute of Integrative Biology, ETH Zurich, Zurich, Switzerland
| | - Felix Gugerli
- Swiss Federal Research Institute WSL, Birmensdorf, Switzerland
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16
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Rohner PT, Roy J, Schäfer MA, Blanckenhorn WU, Berger D. Does thermal plasticity align with local adaptation? An interspecific comparison of wing morphology in sepsid flies. J Evol Biol 2019; 32:463-475. [PMID: 30776168 DOI: 10.1111/jeb.13429] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2018] [Revised: 02/04/2019] [Accepted: 02/06/2019] [Indexed: 12/13/2022]
Abstract
Although genetic and plastic responses are sometimes considered as unrelated processes, their phenotypic effects may often align because genetic adaptation is expected to mirror phenotypic plasticity if adaptive, but run counter to it when maladaptive. Because the magnitude and direction of this alignment has further consequences for both the tempo and mode of adaptation, they are relevant for predicting an organisms' reaction to environmental change. To better understand the interplay between phenotypic plasticity and genetic change in mediating adaptive phenotypic variation to climate variability, we here quantified genetic latitudinal variation and thermal plasticity in wing loading and wing shape in two closely related and widespread sepsid flies. Common garden rearing of 16 geographical populations reared across multiple temperatures revealed that wing loading decreases with latitude in both species. This pattern could be driven by selection for increased dispersal capacity in the cold. However, although allometry, sexual dimorphism, thermal plasticity and latitudinal differentiation in wing shape all show similar patterns in the two species, the relationship between the plastic and genetic responses differed between them. Although latitudinal differentiation (south to north) mirrored thermal plasticity (hot to cold) in Sepsis punctum, there was no relationship in Sepsis fulgens. While this suggests that thermal plasticity may have helped to mediate local adaptation in S. punctum, it also demonstrates that genetic wing shape differentiation and its relation to thermal plasticity may be complex and idiosyncratic, even among ecologically similar and closely related species. Hence, genetic responses can, but do not necessarily, align with phenotypic plasticity induced by changing environmental selection pressures.
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Affiliation(s)
- Patrick T Rohner
- Department of Evolutionary Biology and Environmental Studies, University of Zurich, Zurich, Switzerland
| | - Jeannine Roy
- Department of Evolutionary Biology and Environmental Studies, University of Zurich, Zurich, Switzerland
| | - Martin A Schäfer
- Department of Evolutionary Biology and Environmental Studies, University of Zurich, Zurich, Switzerland
| | - Wolf U Blanckenhorn
- Department of Evolutionary Biology and Environmental Studies, University of Zurich, Zurich, Switzerland
| | - David Berger
- Department of Ecology and Genetics, Evolutionary Biology Centre, Uppsala University, Uppsala, Sweden
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17
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Le Roy C, Debat V, Llaurens V. Adaptive evolution of butterfly wing shape: from morphology to behaviour. Biol Rev Camb Philos Soc 2019; 94:1261-1281. [PMID: 30793489 DOI: 10.1111/brv.12500] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2018] [Revised: 01/21/2019] [Accepted: 01/23/2019] [Indexed: 01/07/2023]
Abstract
Butterflies display extreme variation in wing shape associated with tremendous ecological diversity. Disentangling the role of neutral versus adaptive processes in wing shape diversification remains a challenge for evolutionary biologists. Ascertaining how natural selection influences wing shape evolution requires both functional studies linking morphology to flight performance, and ecological investigations linking performance in the wild with fitness. However, direct links between morphological variation and fitness have rarely been established. The functional morphology of butterfly flight has been investigated but selective forces acting on flight behaviour and associated wing shape have received less attention. Here, we attempt to estimate the ecological relevance of morpho-functional links established through biomechanical studies in order to understand the evolution of butterfly wing morphology. We survey the evidence for natural and sexual selection driving wing shape evolution in butterflies, and discuss how our functional knowledge may allow identification of the selective forces involved, at both the macro- and micro-evolutionary scales. Our review shows that although correlations between wing shape variation and ecological factors have been established at the macro-evolutionary level, the underlying selective pressures often remain unclear. We identify the need to investigate flight behaviour in relevant ecological contexts to detect variation in fitness-related traits. Identifying the selective regime then should guide experimental studies towards the relevant estimates of flight performance. Habitat, predators and sex-specific behaviours are likely to be major selective forces acting on wing shape evolution in butterflies. Some striking cases of morphological divergence driven by contrasting ecology involve both wing and body morphology, indicating that their interactions should be included in future studies investigating co-evolution between morphology and flight behaviour.
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Affiliation(s)
- Camille Le Roy
- Institut de Systématique, Evolution, Biodiversité (ISYEB), Muséum National d'Histoire Naturelle, CNRS, Sorbonne Université, EPHE, Université des Antilles, 57 rue Cuvier CP50, 75005, Paris, France.,Université Paris Descartes, Sorbonne Paris Cité, 12 rue de l'École de Médecine, 75006, Paris, France
| | - Vincent Debat
- Institut de Systématique, Evolution, Biodiversité (ISYEB), Muséum National d'Histoire Naturelle, CNRS, Sorbonne Université, EPHE, Université des Antilles, 57 rue Cuvier CP50, 75005, Paris, France
| | - Violaine Llaurens
- Institut de Systématique, Evolution, Biodiversité (ISYEB), Muséum National d'Histoire Naturelle, CNRS, Sorbonne Université, EPHE, Université des Antilles, 57 rue Cuvier CP50, 75005, Paris, France
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