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Sandoval-Huerta ER, Beltrán-López RG, Pedraza-Marrón CR, Paz-Velásquez MA, Angulo A, Robertson DR, Espinoza E, Domínguez-Domínguez O. The evolutionary history of the goby Elacatinus puncticulatus in the tropical eastern pacific: Effects of habitat discontinuities and local environmental variability. Mol Phylogenet Evol 2018; 130:269-285. [PMID: 30359746 DOI: 10.1016/j.ympev.2018.10.020] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2018] [Revised: 09/05/2018] [Accepted: 10/15/2018] [Indexed: 10/28/2022]
Abstract
Habitat discontinuities, temperature gradients, upwelling systems, and ocean currents, gyres and fronts, can affect distributions of species with narrow environmental tolerance or motility and influence the dispersal of pelagic larvae, with effects ranging from the isolation of adjacent populations to connections between them. The coast of the Tropical Eastern Pacific (TEP) is a highly dynamic environment, with various large gyres and upwelling systems, alternating currents and large rocky-habitat discontinuities, which may greatly influence the genetic connectivity of populations in different parts of the coast. Elacatinus puncticulatus is a cryptic, shallow-living goby that is distributed along the continental shore of virtually the entire TEP, which makes it a good model for testing the influence of these environmental characteristics in the molecular evolution of widespread species in this region. A multilocus phylogeny was used to evaluate the influence of habitat gaps, and oceanographic processes in the evolutionary history of E. puncticulatus throughout its geographical range in the TEP. Two well-supported allopatric clades (one with two allopatric subclades) were recovered, the geographic distribution of which does not correspond to any previously proposed major biogeographic provinces. These populations show strong genetic structure and substantial genetic distances between clades and sub-clades (cytb 0.8-7.3%), with divergence times between them ranging from 0.53 to 4.88 Mya, and recent population expansions dated at 170-130 Kya. The ancestral area of all populations appears to be the Gulf of Panama, while several isolation events have formed the phylogeographic patterns evident in this species. Local and regional oceanographic processes as well as habitat discontinuities have shaped the distribution patterns of the genetic lineages along the continental TEP. Large genetic distances, high genetic differentiation, and the results of species-tree and phylogenetic analyses indicate that E. puncticulatus comprises a complex of three allopatric species with an unusual geographic arrangement.
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Affiliation(s)
- E R Sandoval-Huerta
- Programa Institucional de Maestría en Ciencias Biológicas, Facultad de Biología, Universidad Michoacana de San Nicolás de Hidalgo, Edificio "R" planta baja, Ciudad Universitaria, Morelia, Michoacán 58030, Mexico; Laboratorio de Biología Acuática, Facultad de Biología, Universidad Michoacana de San Nicolás de Hidalgo, Edificio "R" planta baja, Ciudad Universitaria, Morelia, Michoacán 58030, Mexico
| | - R G Beltrán-López
- Programa Institucional de Doctorado en Ciencias Biológicas, Facultad de Biología, Universidad Michoacana de San Nicolás de Hidalgo, Edificio "R" planta baja, Ciudad Universitaria, Morelia, Michoacán 58030, Mexico; Laboratorio de Ictiología, Centro de Investigaciones Biológicas, Universidad Autónoma del Estado de Morelos, Av. Universidad no. 1001, Cuernavaca, Morelos 62209, Mexico.
| | - C R Pedraza-Marrón
- Programa Institucional de Maestría en Ciencias Biológicas, Facultad de Biología, Universidad Michoacana de San Nicolás de Hidalgo, Edificio "R" planta baja, Ciudad Universitaria, Morelia, Michoacán 58030, Mexico; Laboratorio de Biología Acuática, Facultad de Biología, Universidad Michoacana de San Nicolás de Hidalgo, Edificio "R" planta baja, Ciudad Universitaria, Morelia, Michoacán 58030, Mexico
| | - M A Paz-Velásquez
- Centro de Estudios del Mar y Acuicultura, Universidad de San Carlos de Guatemala, Guatemala City, Guatemala
| | - A Angulo
- Museo de Zoología y Centro de Investigación en Ciencias del Mar y Limnología, Universidad de Costa Rica. 11501-2060, San Pedro de Montes de Oca, San José, Costa Rica
| | - D R Robertson
- Naos Marine Laboratory, Smithsonian Tropical Research Institute, Balboa, Panama.
| | - E Espinoza
- Dirección del Parque Nacional Galápagos, Puerto Ayora, Islas Galápagos, Ecuador.
| | - O Domínguez-Domínguez
- Laboratorio de Biología Acuática, Facultad de Biología, Universidad Michoacana de San Nicolás de Hidalgo, Edificio "R" planta baja, Ciudad Universitaria, Morelia, Michoacán 58030, Mexico.
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The Eastern Tropical Pacific coral population connectivity and the role of the Eastern Pacific Barrier. Sci Rep 2018; 8:9354. [PMID: 29921956 PMCID: PMC6008413 DOI: 10.1038/s41598-018-27644-2] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2017] [Accepted: 06/01/2018] [Indexed: 12/03/2022] Open
Abstract
Long-distance dispersal is believed to strongly influence coral reef population dynamics across the Tropical Pacific. However, the spatial scale and strength at which populations are potentially connected by dispersal remains uncertain. To determine the patterns in connectivity between the Eastern (ETP) and Central Tropical Pacific (CTP) ecoregions, we used a biophysical model incorporating ocean currents and larval biology to quantify the seascape-wide dispersal potential among all population. We quantified the likelihood and determined the oceanographic conditions that enable the dispersal of coral larvae across the Eastern Pacific Barrier (EP-Barrier) and identified the main connectivity pathways and their conservation value for dominant reef-building corals. Overall, we found that coral assemblages within the CTP and ETP are weakly connected through dispersal. Although the EP-Barrier isolates the ETP from the CTP ecoregion, we found evidence that the EP-Barrier may be breached, in both directions, by rare dispersal events. These rare events could explain the evolutionary genetic similarity among populations of pocilloporids in the ecoregions. Moreover, the ETP may function as a stronger source rather than a destination, providing potential recruits to CTP populations. We also show evidence for a connectivity loop in the ETP, which may positively influence long-term population persistence in the region. Coral conservation and management communities should consider eight-key stepping stone ecoregions when developing strategies to preserve the long-distance connectivity potential across the ETP and CTP.
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González-Espinosa PC, Paz-García DA, Reyes-Bonilla H, Cabral-Tena RA, Balart EF. Evidence of sexual dimorphism in skeletal morphology of a gonochoric reef coral. ROYAL SOCIETY OPEN SCIENCE 2018; 5:171843. [PMID: 29892377 PMCID: PMC5990760 DOI: 10.1098/rsos.171843] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/09/2017] [Accepted: 04/16/2018] [Indexed: 06/08/2023]
Abstract
In the emerald coral Porites panamensis, the rates of elongation and calcification of colonies are higher in males than in females, probably because of the higher energetic demands of the latter in order to cope with the development of the large planulae produced throughout the year. This differing energetic demand could also be reflected in the sexual dimorphism of the calyces; hence, to test this hypothesis, 11 morphological traits of the corallite were assessed from 63 colonies that were collected in the southern Gulf of California, Mexico. Three traits showed statistical differences between sexes, enabling accurate distinction of males from females. Our results confirm for the first time the existence of external sexual dimorphism in a reef-building coral, opening the possibility that sex-related morphological differences may occur generally in gonochoric scleractinians. These findings can be very useful for the correct classification and characterization of recent and fossil records, helping to improve the historical and evolutive understanding of reef-building corals facing threats under environmental changes.
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Affiliation(s)
- P. C. González-Espinosa
- Laboratorio de Necton y Ecología de Arrecifes, Centro de Investigaciones Biológicas del Noroeste (CIBNOR), La Paz, Baja California Sur, México
| | - D. A. Paz-García
- Laboratorio de Necton y Ecología de Arrecifes, Centro de Investigaciones Biológicas del Noroeste (CIBNOR), La Paz, Baja California Sur, México
| | - H. Reyes-Bonilla
- Laboratorio de Sistemas Arrecifales, Universidad Autónoma de Baja California Sur (UABCS), La Paz, Baja California Sur, México
| | - R. A. Cabral-Tena
- Laboratorio de Necton y Ecología de Arrecifes, Centro de Investigaciones Biológicas del Noroeste (CIBNOR), La Paz, Baja California Sur, México
| | - E. F. Balart
- Laboratorio de Necton y Ecología de Arrecifes, Centro de Investigaciones Biológicas del Noroeste (CIBNOR), La Paz, Baja California Sur, México
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Role of oceanography in shaping the genetic structure in the North Pacific hake Merluccius productus. PLoS One 2018; 13:e0194646. [PMID: 29579060 PMCID: PMC5868808 DOI: 10.1371/journal.pone.0194646] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2017] [Accepted: 03/07/2018] [Indexed: 11/19/2022] Open
Abstract
Determining the relative influence of biotic and abiotic factors on genetic connectivity among populations remains a major challenge in evolutionary biology and in the management and conservation of species. North Pacific hake (Merluccius productus) inhabits upwelling regions in the California Current ecosystem from the Gulf of California to the Gulf of Alaska. In this study, we examined mitochondrial DNA (mtDNA) and microsatellite variation to estimate levels of genetic differentiation of M. productus in relation to the role of oceanographic features as potential barriers to gene flow. Samples were obtained from nine sites spanning a large part of the geographic range of the species, from Puget Sound, Washington to Costa Rica. The microsatellite results revealed three genetically discrete populations: one spanning the eastern Pacific coast, and two apparently resident populations circumscribed to the Puget Sound and the northern Gulf of California (FST = 0.032, p = 0.036). Cytochrome b sequence data indicated that isolation between the Puget Sound and northern Gulf of California populations from the coastal Pacific were recent phenomena (18.5 kyr for Puget Sound and 40 kyr for the northern Gulf of California). Oceanographic data obtained from the Gulf of California support the hypothesis that permanent fronts within the region, and strong gradients at the entrance to the Gulf of California act as barriers to gene flow. A seascape genetics approach found significant genetic–environment associations, where the daytime sea surface temperature and chlorophyll concentrations were the best predictive variables for the observed genetic differentiation. Considering the potential causes of genetic isolation among the three populations, e.g. spawning areas in different latitudes associated with upwelling processes, oceanographic barriers, asymmetric migration and specialized diet, oceanographic barriers appear to be a likely mechanism restricting gene flow.
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Xu S, Song N, Zhao L, Cai S, Han Z, Gao T. Genomic evidence for local adaptation in the ovoviviparous marine fish Sebastiscus marmoratus with a background of population homogeneity. Sci Rep 2017; 7:1562. [PMID: 28484228 PMCID: PMC5431535 DOI: 10.1038/s41598-017-01742-z] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2017] [Accepted: 04/07/2017] [Indexed: 11/09/2022] Open
Abstract
Advances in next-generation sequencing techniques have allowed for the generation of genome-wide sequence data, to gain insight into the dynamics influencing genetic structure and the local adaptation of marine fish. Here, using genotyping-by-sequencing (GBS) technique, we identified 31,119 single nucleotide polymorphisms (SNPs) for Sebastiscus marmoratus in 59 individuals from three populations in Chinese coastal waters. Based on all SNPs, there was little evidence of genetic differentiation among populations. However, outlier tests revealed 329 SNPs putatively under divergent selection across populations. Structural and phylogenetic topology analyses based on the outliers showed clear genetic differentiation among populations. Gene Ontology (GO) annotation results revealed that most of these outliers are known or hypothesized to be involved in metabolic process. Together with previous work using mitochondrial cytochrome b sequences, the present results further suggest that the population structure is strongly influenced by locally adaptive pressure. Overall, adaptive evolution in a heterogeneous environment plays an important role in inducing genetic differentiation among local populations. This study increases understanding of the factors (including gene flow and local adaptation) promoting and constraining population genetic differentiation in marine organisms.
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Affiliation(s)
- Shengyong Xu
- Institute of Evolution & Marine Biodiversity, Ocean University of China, 5th Yushan Road, Qingdao, 266003, P.R. China
| | - Na Song
- Institute of Evolution & Marine Biodiversity, Ocean University of China, 5th Yushan Road, Qingdao, 266003, P.R. China
| | - Linlin Zhao
- The First Institute of Oceanography, State Oceanic Administration, 6th Xianxialing Road, Qingdao, 266061, P.R. China
| | - Shanshan Cai
- Fishery College, Zhejiang Ocean University, 1st Haidanan Road, Zhoushan, 316022, P.R. China
| | - Zhiqiang Han
- Fishery College, Zhejiang Ocean University, 1st Haidanan Road, Zhoushan, 316022, P.R. China.
| | - Tianxiang Gao
- Fishery College, Zhejiang Ocean University, 1st Haidanan Road, Zhoushan, 316022, P.R. China.
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Micheletti SJ, Storfer A. An approach for identifying cryptic barriers to gene flow that limit species' geographic ranges. Mol Ecol 2016; 26:490-504. [DOI: 10.1111/mec.13939] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2016] [Revised: 09/27/2016] [Accepted: 11/14/2016] [Indexed: 01/04/2023]
Affiliation(s)
| | - Andrew Storfer
- School of Biological Sciences Washington State University Pullman WA 99164 USA
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Paz-García DA, Galván-Tirado C, Alvarado JJ, Cortés J, García-De-León FJ, Hellberg ME, Balart EF. Variation in the whole mitogenome of reef-building Porites corals. CONSERV GENET RESOUR 2016. [DOI: 10.1007/s12686-016-0527-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Micheletti SJ, Storfer A. A test of the central-marginal hypothesis using population genetics and ecological niche modelling in an endemic salamander (Ambystoma barbouri). Mol Ecol 2015; 24:967-79. [PMID: 25604892 DOI: 10.1111/mec.13083] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2014] [Revised: 12/29/2014] [Accepted: 01/15/2015] [Indexed: 11/30/2022]
Abstract
The central-marginal hypothesis (CMH) predicts that population size, genetic diversity and genetic connectivity are highest at the core and decrease near the edges of species' geographic distributions. We provide a test of the CMH using three replicated core-to-edge transects that encompass nearly the entire geographic range of the endemic streamside salamander (Ambystoma barbouri). We confirmed that the mapped core of the distribution was the most suitable habitat using ecological niche modelling (ENM) and via genetic estimates of effective population sizes. As predicted by the CMH, we found statistical support for decreased genetic diversity, effective population size and genetic connectivity from core to edge in western and northern transects, yet not along a southern transect. Based on our niche model, habitat suitability is lower towards the southern range edge, presumably leading to conflicting core-to-edge genetic patterns. These results suggest that multiple processes may influence a species' distribution based on the heterogeneity of habitat across a species' range and that replicated sampling may be needed to accurately test the CMH. Our work also emphasizes the importance of identifying the geographic range core with methods other than using the Euclidean centre on a map, which may help to explain discrepancies among other empirical tests of the CMH. Assessing core-to-edge population genetic patterns across an entire species' range accompanied with ENM can inform our general understanding of the mechanisms leading to species' geographic range limits.
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Affiliation(s)
- Steven J Micheletti
- School of Biological Sciences, Washington State University, Pullman, WA, 99164, USA
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Del Río-Portilla MA, Vargas-Peralta CE, Paz-García DA, Lafarga De La Cruz F, Balart EF, García-de-León FJ. The complete mitochondrial DNA of endemic Eastern Pacific coral (Porites panamensis). Mitochondrial DNA A DNA Mapp Seq Anal 2014; 27:738-9. [PMID: 24810066 DOI: 10.3109/19401736.2014.913166] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
The mitogenome of the endemic coral Porites panamensis (Genbank accession number KJ546638) has a total length of 18,628 bp, and the arrangement consist of 13 protein-coding genes, 2 ribosomal RNA (rRNA) genes and 2 transfer RNA (tRNA) genes. Gene order was equal to other scleractinian coral mitogenomes.
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Affiliation(s)
- Miguel A Del Río-Portilla
- a Departamento de Acuicultura , Centro de Investigación Científica y de Educación Superior de Ensenada, B.C., Carretera Ensenada-Tijuana , Zona Playitas , Ensenada , B. C. , México
| | - Carmen E Vargas-Peralta
- a Departamento de Acuicultura , Centro de Investigación Científica y de Educación Superior de Ensenada, B.C., Carretera Ensenada-Tijuana , Zona Playitas , Ensenada , B. C. , México
| | - David A Paz-García
- b Laboratorio de Genética para la Conservación , Centro de Investigaciones Biológicas del Noroeste (CIBNOR), Instituto Politécnico Nacional 195, Colonia Playa Palo de Santa Rita Sur , La Paz , Baja California Sur , México , and.,c Laboratorio de Necton y Ecología de Arrecifes , Centro de Investigaciones Biológicas del Noroeste (CIBNOR), Instituto Politécnico Nacional 195, Colonia Playa Palo de Santa Rita Sur , La Paz , Baja California Sur , México
| | - Fabiola Lafarga De La Cruz
- a Departamento de Acuicultura , Centro de Investigación Científica y de Educación Superior de Ensenada, B.C., Carretera Ensenada-Tijuana , Zona Playitas , Ensenada , B. C. , México
| | - Eduardo F Balart
- c Laboratorio de Necton y Ecología de Arrecifes , Centro de Investigaciones Biológicas del Noroeste (CIBNOR), Instituto Politécnico Nacional 195, Colonia Playa Palo de Santa Rita Sur , La Paz , Baja California Sur , México
| | - Francisco J García-de-León
- b Laboratorio de Genética para la Conservación , Centro de Investigaciones Biológicas del Noroeste (CIBNOR), Instituto Politécnico Nacional 195, Colonia Playa Palo de Santa Rita Sur , La Paz , Baja California Sur , México , and
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