1
|
Butler BO, Smith LL, Flores-Villela O. Phylogeography and taxonomy of Coleonyx elegans Gray 1845 (Squamata: Eublepharidae) in Mesoamerica: The Isthmus of Tehuantepec as an environmental barrier. Mol Phylogenet Evol 2023; 178:107632. [PMID: 36182052 DOI: 10.1016/j.ympev.2022.107632] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2022] [Revised: 08/05/2022] [Accepted: 09/23/2022] [Indexed: 12/14/2022]
Abstract
Population divergence leading to speciation is often explained by physical barriers causing allopatric distributions of historically connected populations. Environmental barriers have increasingly been shown to cause population divergence through local adaptation to distinct ecological characteristics. In this study, we evaluate population structuring and phylogeographic history within the Yucatán banded gecko Coleonyx elegans Gray 1845 to assess the role of both physical and environmental barriers in shaping the spatio-genetic distribution of a Mesoamerican tropical forest taxon. We generated RADseq and multi-locus Sanger datasets that included sampling across the entire species' range. Results find support for two distinct evolutionary lineages that diverged during the late Pliocene and show recent population expansions. Furthermore, these genetic lineages largely align with subspecies boundaries defined by morphology. Several mountain ranges identified as phylogeographic barriers in other taxa act as physical barriers to gene flow between the two clades. Despite the absence of a physical barrier between lineages across the lowland Isthmus of Tehuantepec, no introgression was observed. Here, a steep environmental cline associated with seasonality of precipitation corresponds exactly with the distributional limits of the lineages, whose closest samples are only 30 km apart. The combination of molecular and environmental evidence, and in conjunction with previous morphological evidence, allows us to reassess the current taxonomy in an integrative framework. Based on our findings, we elevate the previously recognized subspecies from the Pacific versant, the Colima banded gecko C. nemoralis Klauber 1945, to full species status and comment on conservation implications.
Collapse
Affiliation(s)
- Brett O Butler
- Museo de Zoología "Alfonso L. Herrera", Facultad de Ciencias, Universidad Nacional Autónoma de México, Av. Ciudad Universitaria 3000, C. P. 04510 Coyoacán, CDMX, Mexico; Posgrado en Ciencias Biológicas, Universidad Nacional Autónoma de México, Av. Ciudad Universitaria 3000, C. P. 04510 Coyoacán, CDMX, Mexico.
| | - Lydia L Smith
- Museum of Vertebrate Zoology, 3101 Valley Life Sciences Building, University of California, Berkeley, CA 94720, USA
| | - Oscar Flores-Villela
- Museo de Zoología "Alfonso L. Herrera", Facultad de Ciencias, Universidad Nacional Autónoma de México, Av. Ciudad Universitaria 3000, C. P. 04510 Coyoacán, CDMX, Mexico
| |
Collapse
|
2
|
Macedo G, Marcondes RS, Biondo C, Bravo GA, Derryberry EP. The evolution of sex similarities in social signals: Climatic seasonality is associated with lower sexual dimorphism and greater elaboration of female and male signals in antbirds (Thamnophilidae). Evolution 2022; 76:2893-2915. [PMID: 36237126 DOI: 10.1111/evo.14638] [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: 04/05/2022] [Revised: 09/02/2022] [Accepted: 09/05/2022] [Indexed: 01/22/2023]
Abstract
Selection on signals that mediate social competition varies with resource availability. Climate regulates resource availability, which may affect the strength of competition and selection on signals. Traditionally, this meant that more seasonal, colder, or dryer-overall harsher-environments should favor the elaboration of male signals under stronger male-male competition, increasing sexual dimorphism. However, females also use signals to compete; thus, harsher environments could strengthen competition and favor elaboration of signals in both sexes, decreasing sexual dimorphism. Alternatively, harsher environments could decrease sexual dimorphism due to scarcer resources to invest in signal elaboration in both sexes. We evaluated these contrasting hypotheses in antbirds, a family of Neotropical passerines that varies in female and male signals and occurs across diverse climatic regimes. We tested the association of sexual dimorphism of plumage coloration and songs with temperature, precipitation, and their seasonality. We found that greater seasonality is associated with lower sexual dimorphism in plumage coloration and greater elaboration of visual signals in both sexes, but not acoustic signals. Our results suggest that greater seasonality may be associated with convergent elaboration of female and male visual signals, highlighting the role of signals of both sexes in the evolution of sexual dimorphism.
Collapse
Affiliation(s)
- Gabriel Macedo
- Center for Natural Sciences and Humanities, Federal University of ABC (UFABC), São Bernardo do Campo, SP, 09606-045, Brazil.,Department of Ecology and Evolutionary Biology, University of Tennessee, Knoxville, Tennessee, 37996
| | - Rafael S Marcondes
- Museum of Natural Science, Louisiana State University, Baton Rouge, Louisiana, 70803.,Current Address: Department of Biosciences, Rice University, Houston, Texas, 77005
| | - Cibele Biondo
- Center for Natural Sciences and Humanities, Federal University of ABC (UFABC), São Bernardo do Campo, SP, 09606-045, Brazil
| | - Gustavo A Bravo
- Sección de Ornitología, Colecciones Biológicas, Instituto de Investigación de Recursos Biológicos Alexander von Humboldt, Villa de Leyva, 154001, Colombia.,Department of Organismic and Evolutionary Biology and Museum of Comparative Zoology, Harvard University, Cambridge, Massachusetts, 02138
| | - Elizabeth P Derryberry
- Department of Ecology and Evolutionary Biology, University of Tennessee, Knoxville, Tennessee, 37996
| |
Collapse
|
3
|
Badillo-Saldaña LM, García-Rosales A, Ramírez-Bautista A. Influence of microhabitat use on morphology traits of three species of the Anolis sericeus complex (Squamata: Dactyloidae) in Mexico. ZOOLOGY 2022; 152:126003. [DOI: 10.1016/j.zool.2022.126003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2020] [Revised: 02/23/2022] [Accepted: 03/04/2022] [Indexed: 10/18/2022]
|
4
|
Differences in plumage coloration predict female but not male territorial responses in three antbird sister species pairs. Anim Behav 2021. [DOI: 10.1016/j.anbehav.2021.09.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
|