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Cruz DD, Ospina-Garces SM, Arellano E, Ibarra-Cerdeña CN, Nava-García E, Alcalá R. Geometric morphometrics and ecological niche modelling for delimitation of Triatoma pallidipennis (Hemiptera: Reduviidae: Triatominae) haplogroups. CURRENT RESEARCH IN PARASITOLOGY & VECTOR-BORNE DISEASES 2023; 3:100119. [PMID: 37009555 PMCID: PMC10064238 DOI: 10.1016/j.crpvbd.2023.100119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2023] [Revised: 02/27/2023] [Accepted: 03/07/2023] [Indexed: 03/17/2023]
Abstract
A recent phylogenetic analysis of Triatoma pallidipennis, an important Chagas disease vector in Mexico, based on molecular markers, revealed five monophyletic haplogroups with validity as cryptic species. Here, we compare T. pallidipennis haplogroups using head and pronotum features, environmental characteristics of their habitats, and ecological niche modeling. To analyze variation in shape, images of the head and pronotum of the specimens were obtained and analyzed using methods based on landmarks and semi-landmarks. Ecological niche models were obtained from occurrence data, as well as a set of bioclimatic variables that characterized the environmental niche of each analyzed haplogroup. Deformation grids for head showed a slight displacement towards posterior region of pre-ocular landmarks. Greatest change in head shape was observed with strong displacement towards anterior region of antenniferous tubercle. Procrustes ANOVA and pairwise comparisons showed differences in mean head shape in almost all haplogroups. However, pairwise comparisons of mean pronotum shape only showed differences among three haplogroups. Correct classification of all haplogroups was not possible using discriminant analysis. Important differences were found among the environmental niches of the analyzed haplogroups. Ecological niche models of each haplogroup did not predict the climatic suitability areas of the other haplogroups, revealing differences in environmental conditions. Significant differences were found between at least two haplogroups, demonstrating distinct environmental preferences among them. Our results show how the analysis of morphometric variation and the characterization of the environmental conditions that define the climatic niche can be used to improve the delimitation of T. pallidipennis haplogroups that constitute cryptic species.
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DeVos TB, Bock DG, Kolbe JJ. Rapid introgression of non-native alleles following hybridization between a native Anolis lizard species and a cryptic invader across an urban landscape. Mol Ecol 2023; 32:2930-2944. [PMID: 36811388 DOI: 10.1111/mec.16897] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2022] [Revised: 02/14/2023] [Accepted: 02/20/2023] [Indexed: 02/24/2023]
Abstract
Invasive species can impact native populations through competition, predation, habitat alteration, and disease transmission, but also genetically through hybridization. Potential outcomes of hybridization span the continuum from extinction to hybrid speciation and can be further complicated by anthropogenic habitat disturbance. Hybridization between the native green anole lizard (Anolis carolinensis) and a morphologically similar invader (A. porcatus) in south Florida provides an ideal opportunity to study interspecific admixture across a heterogeneous landscape. We used reduced-representation sequencing to describe introgression in this hybrid system and to test for a relationship between urbanization and non-native ancestry. Our findings indicate that hybridization between green anole lineages was probably a limited, historic event, producing a hybrid population characterized by a diverse continuum of ancestry proportions. Genomic cline analyses revealed rapid introgression and disproportionate representation of non-native alleles at many loci and no evidence for reproductive isolation between parental species. Three loci were associated with urban habitat characteristics; urbanization and non-native ancestry were positively correlated, although this relationship did not remain significant when accounting for spatial nonindependence. Ultimately, our study demonstrates the persistence of non-native genetic material even in the absence of ongoing immigration, indicating that selection favouring non-native alleles can override the demographic limitation of low propagule pressure. We also note that not all outcomes of admixture between native and non-native species should be considered intrinsically negative. Hybridization with ecologically robust invaders can lead to adaptive introgression, which may facilitate the long-term survival of native populations otherwise unable to adapt to anthropogenically mediated global change.
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Affiliation(s)
- Tyler B DeVos
- Department of Biological Sciences, University of Rhode Island, Kingston, Rhode Island, USA
| | - Dan G Bock
- Department of Biology, Washington University, St. Louis, Missouri, USA
| | - Jason J Kolbe
- Department of Biological Sciences, University of Rhode Island, Kingston, Rhode Island, USA
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MacGuigan DJ, Mount GG, Watkins-Colwell GJ, Near TJ, Lambert MR. Genomic Data Clarify Aquarana Systematics and Reveal Isolation-by-Distance Dominates Phylogeography of the Wide-Ranging Frog Rana clamitans. ICHTHYOLOGY & HERPETOLOGY 2022. [DOI: 10.1643/h2021129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Daniel J. MacGuigan
- Department of Biological Sciences, University at Buffalo, Buffalo, New York 14260;
| | | | - Gregory J. Watkins-Colwell
- Division of Vertebrate Zoology, Peabody Museum of Natural History, Yale University, New Haven, Connecticut 06511; (GJWC) gregory.
| | - Thomas J. Near
- Division of Vertebrate Zoology, Peabody Museum of Natural History, Yale University, New Haven, Connecticut 06511; (GJWC) gregory.
| | - Max R. Lambert
- Science Division, Habitat Program, Washington Department of Fish & Wildlife, Olympia, Washington 98501;
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Abstract
SignificanceGeography molds how species evolve in space. Strong geographical barriers to movement, for instance, both inhibit dispersal between regions and allow isolated populations to diverge as new species. Weak barriers, by contrast, permit species range expansion and persistence. These factors present a conundrum: How strong must a barrier be before between-region speciation outpaces dispersal? We designed a phylogenetic model of dispersal, extinction, and speciation that allows regional features to influence rates of biogeographic change and applied it to the neotropical radiation of Anolis lizards. Separation by water induces a threefold steeper barrier to movement than equivalent distances over land. Our model will help biologists detect relationships between evolutionary processes and the spatial contexts in which they operate.
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MacGuigan DJ, Hoagstrom CW, Domisch S, Hulsey CD, Near TJ. Integrative ichthyological species delimitation in the Greenthroat Darter complex (Percidae: Etheostomatinae). ZOOL SCR 2021. [DOI: 10.1111/zsc.12504] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
| | | | - Sami Domisch
- Department of Ecosystem Research Leibniz‐Institute of Freshwater Ecology and Inland Fisheries Berlin Germany
| | - C. Darrin Hulsey
- Laboratory for Zoology and Evolutionary Biology Department of Biology University of Konstanz Konstanz Germany
| | - Thomas J. Near
- Department of Ecology and Evolutionary Biology Yale University New Haven CT USA
- Peabody Museum of Natural History Yale University New Haven CT USA
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de Mello PLH, Hime PM, Glor RE. Transcriptomic Analysis of Skin Color in Anole Lizards. Genome Biol Evol 2021; 13:evab110. [PMID: 33988681 PMCID: PMC8290120 DOI: 10.1093/gbe/evab110] [Citation(s) in RCA: 6] [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] [Accepted: 05/13/2021] [Indexed: 01/23/2023] Open
Abstract
Color and color pattern are critical for animal camouflage, reproduction, and defense. Few studies, however, have attempted to identify candidate genes for color and color pattern in squamate reptiles, a colorful group with over 10,000 species. We used comparative transcriptomic analyses between white, orange, and yellow skin in a color-polymorphic species of anole lizard to 1) identify candidate color and color-pattern genes in squamates and 2) assess if squamates share an underlying genetic basis for color and color pattern variation with other vertebrates. Squamates have three types of chromatophores that determine color pattern: guanine-filled iridophores, carotenoid- or pteridine-filled xanthophores/erythrophores, and melanin-filled melanophores. We identified 13 best candidate squamate color and color-pattern genes shared with other vertebrates: six genes linked to pigment synthesis pathways, and seven genes linked to chromatophore development and maintenance. In comparisons of expression profiles between pigment-rich and white skin, pigment-rich skin upregulated the pteridine pathway as well as xanthophore/erythrophore development and maintenance genes; in comparisons between orange and yellow skin, orange skin upregulated the pteridine and carotenoid pathways as well as melanophore maintenance genes. Our results corroborate the predictions that squamates can produce similar colors using distinct color-reflecting molecules, and that both color and color-pattern genes are likely conserved across vertebrates. Furthermore, this study provides a concise list of candidate genes for future functional verification, representing a first step in determining the genetic basis of color and color pattern in anoles.
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Affiliation(s)
- Pietro Longo Hollanda de Mello
- Department of Ecology and Evolutionary Biology, University of Kansas, Lawrence, KS, USA
- Biodiversity Institute and Natural History Museum, University of Kansas, Lawrence, KS, USA
| | - Paul M Hime
- Biodiversity Institute and Natural History Museum, University of Kansas, Lawrence, KS, USA
| | - Richard E Glor
- Department of Ecology and Evolutionary Biology, University of Kansas, Lawrence, KS, USA
- Biodiversity Institute and Natural History Museum, University of Kansas, Lawrence, KS, USA
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Burress ED, Muñoz MM. Ecological Opportunity from Innovation, not Islands, Drove the Anole Lizard Adaptive Radiation. Syst Biol 2021; 71:93-104. [PMID: 33956152 DOI: 10.1093/sysbio/syab031] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2021] [Revised: 04/28/2021] [Accepted: 05/03/2021] [Indexed: 12/15/2022] Open
Abstract
Islands are thought to facilitate adaptive radiation by providing release from competition and predation. Anole lizards are considered a classic example of this phenomenon: different ecological specialists ('ecomorphs') evolved in the Caribbean Greater Antilles (Cuba, Hispaniola, Jamaica, and Puerto Rico), resulting in convergent assemblages that are not observed in mainland Latin America. Yet, the role of islands in facilitating adaptive radiation is more often implied than directly tested, leaving uncertain the role of biogeography in stimulating diversification. Here, we assess the proposed "island effect" on anole diversification using Bayesian phylogenetic comparative methods that explicitly incorporate rate heterogeneity across the tree and demonstrate two cases of would-be false positives. We discovered that rates of speciation and morphological evolution of island and mainland anoles are equivalent, implying that islands provide no special context for exceptionally rapid diversification. Likewise, rates of evolution were equivalent between island anoles that arose via in situ versus dispersal-based mechanisms, and we found no evidence for island-specific rates of speciation or morphological evolution. Nonetheless, the origin of Anolis is characterized by a speciation pulse that slowed over time - a classic signature of waning ecological opportunity. Our findings cast doubt on the notion that islands catalyzed the anole adaptive radiation and instead point to a key innovation, adhesive toe pads, which facilitated the exploitation of many arboreal niches sparsely utilized by other iguanian lizards. The selective pressures responsible for arboreal niche diversification differ between islands and the mainland, but the tempo of diversification driven by these discordant processes is indistinguishable.
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Affiliation(s)
- Edward D Burress
- Department of Ecology and Evolutionary Biology, Yale University, New Haven, Connecticut, USA
| | - Martha M Muñoz
- Department of Ecology and Evolutionary Biology, Yale University, New Haven, Connecticut, USA
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Stuart‐Fox D, Aulsebrook A, Rankin KJ, Dong CM, McLean CA. Convergence and divergence in lizard colour polymorphisms. Biol Rev Camb Philos Soc 2020; 96:289-309. [DOI: 10.1111/brv.12656] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2020] [Revised: 09/24/2020] [Accepted: 09/25/2020] [Indexed: 01/03/2023]
Affiliation(s)
- Devi Stuart‐Fox
- School of BioSciences The University of Melbourne Royal Parade Parkville VIC 3010 Australia
| | - Anne Aulsebrook
- School of BioSciences The University of Melbourne Royal Parade Parkville VIC 3010 Australia
| | - Katrina J. Rankin
- School of BioSciences The University of Melbourne Royal Parade Parkville VIC 3010 Australia
| | - Caroline M. Dong
- School of BioSciences The University of Melbourne Royal Parade Parkville VIC 3010 Australia
- Sciences Department Museums Victoria 11 Nicholson Street Carlton Gardens VIC 3053 Australia
| | - Claire A. McLean
- School of BioSciences The University of Melbourne Royal Parade Parkville VIC 3010 Australia
- Sciences Department Museums Victoria 11 Nicholson Street Carlton Gardens VIC 3053 Australia
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Myers TC, de Mello PLH, Glor RE. A morphometric assessment of species boundaries in a widespread anole lizard (Squamata: Dactyloidae). Biol J Linn Soc Lond 2020. [DOI: 10.1093/biolinnean/blaa082] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
AbstractCryptic species – genetically distinct species that are morphologically difficult to distinguish – present challenges to systematists. Operationally, cryptic species are very difficult to identify and sole use of genetic data or morphological data can fail to recognize evolutionarily isolated lineages. We use morphometric data to test species boundaries hypothesized with genetic data in the North Caribbean bark anole (Anolis distichus), a suspected species complex. We use univariate and multivariate analyses to test if candidate species based on genetic data can be accurately diagnosed. We also test alternative species delimitation scenarios with a model fitting approach that evaluates normal mixture models capable of identifying morphological clusters. Our analyses reject the hypothesis that the candidate species are diagnosable. Neither uni- nor multivariate morphometric data distinguish candidate species. The best-supported model included two morphological clusters; however, these clusters were uneven and did not align with a plausible species divergence scenario. After removing two related traits driving this result, only one cluster was supported. Despite substantial differentiation revealed by genetic data, we recover no new evidence to delimit species and refrain from taxonomic revision. This study highlights the importance of considering other types of data along with molecular data when delimiting species.
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Affiliation(s)
- Tanner C Myers
- Department of Biological Sciences & Museum of Natural History, Auburn University, Auburn, AL, USA
| | - Pietro L H de Mello
- Department of Ecology and Evolutionary Biology, University of Kansas, Lawrence, KS, USA
- Herpetology Division, Biodiversity Institute, University of Kansas, Lawrence, KS, USA
| | - Richard E Glor
- Department of Ecology and Evolutionary Biology, University of Kansas, Lawrence, KS, USA
- Herpetology Division, Biodiversity Institute, University of Kansas, Lawrence, KS, USA
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Mason NA, Fletcher NK, Gill BA, Funk WC, Zamudio KR. Coalescent-based species delimitation is sensitive to geographic sampling and isolation by distance. SYST BIODIVERS 2020. [DOI: 10.1080/14772000.2020.1730475] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- Nicholas A. Mason
- Department of Ecology and Evolutionary Biology, Cornell University, Corson Hall, Ithaca, New York 14853, USA
| | - Nicholas K. Fletcher
- Department of Ecology and Evolutionary Biology, Cornell University, Corson Hall, Ithaca, New York 14853, USA
| | - Brian A. Gill
- Department of Biology, Colorado State University, Fort Collins, Colorado 80523, USA
- Graduate Degree Program in Ecology, Colorado State University, Fort Collins, Colorado 80523, USA
| | - W. Chris Funk
- Department of Biology, Colorado State University, Fort Collins, Colorado 80523, USA
- Graduate Degree Program in Ecology, Colorado State University, Fort Collins, Colorado 80523, USA
| | - Kelly R. Zamudio
- Department of Ecology and Evolutionary Biology, Cornell University, Corson Hall, Ithaca, New York 14853, USA
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12
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MacGuigan DJ, Geneva AJ, Glor RE. A genomic assessment of species boundaries and hybridization in a group of highly polymorphic anoles ( distichus species complex). Ecol Evol 2017; 7:3657-3671. [PMID: 28616163 PMCID: PMC5468153 DOI: 10.1002/ece3.2751] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2016] [Revised: 08/12/2016] [Accepted: 12/22/2016] [Indexed: 02/05/2023] Open
Abstract
Delimiting young species is one of the great challenges of systematic biology, particularly when the species in question exhibit little morphological divergence. Anolis distichus, a trunk anole with more than a dozen subspecies that are defined primarily by dewlap color, may actually represent several independent evolutionary lineages. To test this, we utilized amplified fragment length polymorphisms (AFLP) genome scans and genetic clustering analyses in conjunction with a coalescent‐based species delimitation method. We examined a geographically widespread set of samples and two heavily sampled hybrid zones. We find that genetic divergence is associated with a major biogeographic barrier, the Hispaniolan paleo‐island boundary, but not with dewlap color. Additionally, we find support for hypotheses regarding colonization of two Hispaniolan satellite islands and the Bahamas from mainland Hispaniola. Our results show that A. distichus is composed of seven distinct evolutionary lineages still experiencing a limited degree of gene flow. We suggest that A. distichus merits taxonomic revision, but that dewlap color cannot be relied upon as the primary diagnostic character.
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Affiliation(s)
- Daniel J MacGuigan
- Department of Ecology and Evolutionary Biology Yale University New Haven CT USA
| | - Anthony J Geneva
- Department of Organismic and Evolutionary Biology Harvard University Cambridge MA USA
| | - Richard E Glor
- Herpetology Division Biodiversity Institute University of Kansas Lawrence KS USA.,Department of Ecology and Evolutionary Biology University of Kansas Lawrence KS USA
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