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Reuber VM, Westbury MV, Rey-Iglesia A, Asefa A, Farwig N, Miehe G, Opgenoorth L, Šumbera R, Wraase L, Wube T, Lorenzen ED, Schabo DG. Topographic barriers drive the pronounced genetic subdivision of a range-limited fossorial rodent. Mol Ecol 2024; 33:e17271. [PMID: 38279205 DOI: 10.1111/mec.17271] [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: 04/13/2023] [Revised: 12/20/2023] [Accepted: 01/08/2024] [Indexed: 01/28/2024]
Abstract
Due to their limited dispersal ability, fossorial species with predominantly belowground activity usually show increased levels of population subdivision across relatively small spatial scales. This may be exacerbated in harsh mountain ecosystems, where landscape geomorphology limits species' dispersal ability and leads to small effective population sizes, making species relatively vulnerable to environmental change. To better understand the environmental drivers of species' population subdivision in remote mountain ecosystems, particularly in understudied high-elevation systems in Africa, we studied the giant root-rat (Tachyoryctes macrocephalus), a fossorial rodent confined to the afro-alpine ecosystem of the Bale Mountains in Ethiopia. Using mitochondrial and low-coverage nuclear genomes, we investigated 77 giant root-rat individuals sampled from nine localities across its entire ~1000 km2 range. Our data revealed a distinct division into a northern and southern group, with no signs of gene flow, and higher nuclear genetic diversity in the south. Landscape genetic analyses of the mitochondrial and nuclear genomes indicated that population subdivision was driven by slope and elevation differences of up to 500 m across escarpments separating the north and south, potentially reinforced by glaciation of the south during the Late Pleistocene (~42,000-16,000 years ago). Despite this landscape-scale subdivision between the north and south, weak geographic structuring of sampling localities within regions indicated gene flow across distances of at least 16 km at the local scale, suggesting high, aboveground mobility for relatively long distances. Our study highlights that despite the potential for local-scale gene flow in fossorial species, topographic barriers can result in pronounced genetic subdivision. These factors can reduce genetic variability, which should be considered when developing conservation strategies.
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Affiliation(s)
- Victoria M Reuber
- Department of Biology, Conservation Ecology, University of Marburg, Marburg, Germany
| | | | | | - Addisu Asefa
- Department of Biology, Conservation Ecology, University of Marburg, Marburg, Germany
- Ethiopian Wildlife Conservation Authority, Addis Ababa, Ethiopia
| | - Nina Farwig
- Department of Biology, Conservation Ecology, University of Marburg, Marburg, Germany
| | - Georg Miehe
- Department of Geography, Vegetation Geography, University of Marburg, Marburg, Germany
| | - Lars Opgenoorth
- Department of Biology, Plant Ecology & Geobotany, University of Marburg, Marburg, Germany
- Swiss Federal Research Institute WSL, Birmensdorf, Switzerland
| | - Radim Šumbera
- Department of Zoology, University of South Bohemia, České Budějovice, Czech Republic
| | - Luise Wraase
- Department of Geography, Environmental Informatics, University of Marburg, Marburg, Germany
| | - Tilaye Wube
- Department of Zoological Sciences, College of Natural and Computational Sciences, Addis Ababa University, Addis Ababa, Ethiopia
| | | | - Dana G Schabo
- Department of Biology, Conservation Ecology, University of Marburg, Marburg, Germany
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2
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Izidoro TD, Grott SC, Kubiak BB, de Freitas TRO, Alves TC, Almeida EA, Galiano D. Oxidative status of Ctenomys flamarioni (Rodentia: Ctenomyidae) in natural areas with different levels of anthropic activity in southern Brazil. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:64710-64718. [PMID: 37072591 DOI: 10.1007/s11356-023-27083-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2022] [Accepted: 04/13/2023] [Indexed: 05/03/2023]
Abstract
Rampant urbanization in coastal environments turns areas close to the seafront into a highly impacted ecosystem, possibly affecting the health and well-being of resident animal species. The tuco-tuco Ctenomys flamarioni is an endemic and endangered subterranean mammal from southern Brazil, and the anthropic influence was considered one of the main threats to the species. In this context, the present study aimed to investigate the patterns of oxidative status of the species in natural areas with different levels of anthropogenic disturbance. We evaluated two populations of C. flamarioni, one located in an area with intense anthropogenic impact due to urbanization and tourist activity, and the other in a non-impacted area. Oxidative injury parameters (lipid peroxidation and carbonylated protein levels), and the activities of the antioxidant enzymes superoxide dismutase, catalase, glutathione peroxidase, glucose 6-phosphate dehydrogenase, glutathione S-transferase and carboxylesterase were measured. Individuals inhabiting the impacted area had lower G6PDH activity and higher levels of carbonylated proteins. This combination of higher level of oxidative damage and lower antioxidant activity is an indication that the oxidative status of animals in the impacted population is possibly being affected as a consequence of anthropogenic activities in this environment. The values of the parameters obtained in the current study can be used as a reference of the oxidative state of C. flamarioni in future studies with tuco-tucos.
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Affiliation(s)
- Tays Daiane Izidoro
- Programa de Pós-Graduação Em Biodiversidade, Universidade Regional de Blumenau, Rua Antônio da Veiga, 140, Blumenau, SC, 89030-903, Brazil
| | - Suelen Cristina Grott
- Programa de Pós-Graduação Em Engenharia Ambiental, Universidade Regional de Blumenau, Rua Antônio da Veiga, 140, Blumenau, SC, 89030-903, Brazil
| | - Bruno Busnello Kubiak
- Universidade Federal Do Rio Grande Do Sul, Av. Bento Gonçalves, 9500, Porto Alegre, RS, 91501-970, Brazil
| | | | - Thiago Caique Alves
- Programa de Pós-Graduação Em Engenharia Ambiental, Universidade Regional de Blumenau, Rua Antônio da Veiga, 140, Blumenau, SC, 89030-903, Brazil
| | - Eduardo Alves Almeida
- Programa de Pós-Graduação Em Biodiversidade, Universidade Regional de Blumenau, Rua Antônio da Veiga, 140, Blumenau, SC, 89030-903, Brazil
| | - Daniel Galiano
- Programa de Pós-Graduação Em Biodiversidade, Universidade Regional de Blumenau, Rua Antônio da Veiga, 140, Blumenau, SC, 89030-903, Brazil.
- Universidade Federal da Fronteira Sul, Campus Realeza, Rua Edmundo Gaievisk, 1000, Realeza, PR, 85770-000, Brazil.
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3
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Caraballo DA, López SL, Botero-Cañola S, Gardner SL. Filling the gap in distribution ranges and conservation status in Ctenomys (Rodentia: Ctenomyidae). J Mammal 2023. [DOI: 10.1093/jmammal/gyac099] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
Abstract
South American subterranean rodents of the genus Ctenomys (Rodentia, Ctenomyidae, tuco-tuco) are one of the most diverse genera among mammals. Recently described species, new taxonomic revisions, and new distribution range delimitation made the revision of distribution areas and conservation status of these mammals mandatory. Implementing the first part of the DAMA protocol (document, assess, monitor, act), here we compile updated sets of species distribution range maps and use these and the number of collection localities to assess the conservation status of ctenomyids. We integrate potential for conservation in protected areas, and levels of habitat transformation to revise previous conservation status assessments and propose the first assessment for all Data Deficient or not evaluated species of tuco-tucos. Our results indicate that 53 (78%) of these species are threatened and that 47 (69%) have little or no overlap with protected areas, emphasizing the urgent need to conduct conservation efforts. Here, 18 of 22 species previously classified as Data Deficient resulted in them being put in an at-risk category (VU, EN, CR). In addition, nine species that have not been previously evaluated were classified as threatened, with these two groups comprising more than 47% of the known species. These results posit that the Ctenomyidae are the rodent family with the greatest number of species at risk of extinction. Finally, a total of 33 (49%) species have been reported from three or fewer localities; all considered threatened through the approach implemented in this study. These geographically restricted taxa should be given more attention in conservation programs since the richness of this genus relies on the survival of such species.
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Affiliation(s)
- Diego A Caraballo
- Instituto de Ecología, Genética y Evolución de Buenos Aires (IEGEBA) , UBA-CONICET, Ciudad Universitaria-Pabellón II, Ciudad Autónoma de Buenos Aires C1428EHA , Argentina
| | - Sabrina Laura López
- Instituto de Cálculo, UBA-CONICET, Ciudad Universitaria - Cero + Infinito , Ciudad Autónoma de Buenos Aires C1428EHA , Argentina
| | - Sebastián Botero-Cañola
- Manter Laboratory of Parasitology, University of Nebraska State Museum, and School of Biological Sciences, University of Nebraska-Lincoln , Lincoln, Nebraska 68588-0514 , USA
- Fundación Laboratorios de Conservación Colombia , Medellín 050034, SB-C , Colombia
| | - Scott Lyell Gardner
- Manter Laboratory of Parasitology, University of Nebraska State Museum, and School of Biological Sciences, University of Nebraska-Lincoln , Lincoln, Nebraska 68588-0514 , USA
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4
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Graboski R, Arredondo JC, Grazziotin FG, Guerra-Fuentes RA, Da Silva AAA, Prudente ALC, Pinto RR, Rodrigues MT, Bonatto SL, Zaher H. Revealing the cryptic diversity of the widespread and poorly known South American blind snake genus Amerotyphlops (Typhlopidae: Scolecophidia) through integrative taxonomy. Zool J Linn Soc 2022. [DOI: 10.1093/zoolinnean/zlac059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Abstract
Morphological stasis is generally associated with relative constancy in ecological pressures throughout time, producing strong stabilizing selection that retains similar shared morphology. Although climate and vegetation are commonly the main key factors driving diversity and phenotypic diversification in terrestrial vertebrates, fossorial organisms have their morphology mostly defined by their fossorial lifestyle. Among these secretive fossorial organisms, blind snakes of the South American genus Amerotyphlops are considered poorly studied when compared to other taxa. Here, we evaluate the cryptic diversity of Amerotyphlops using phylogenetic and multivariate approaches. We based our phylogenetic analysis on a molecular dataset composed of 12 gene fragments (eight nuclear and four mitochondrial) for 109 species of Typhlopidae. The multivariate analysis was implemented using 36 morphological variables for 377 specimens of Amerotyphlops. Additionally, we contrast our phylogenetic result with the morphological variation found in cranial, external and hemipenial traits. Our phylogenetic results recovered with strong support the following monophyletic groups within Amerotyphlops: (1) a clade formed by A. tasymicris and A. minuisquamus; (2) a clade composed of A. reticulatus; (3) a north-eastern Brazilian clade including A. yonenagae, A. arenensis, A. paucisquamus and A. amoipira; and (4) a clade composed of A. brongersmianus and a complex of cryptic species. Based on these results we describe four new species of Amerotyphlops from north-eastern and south-eastern Brazil, which can be distinguished from the morphologically similar species, A. brongersmianus and A. arenensis.
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Affiliation(s)
- Roberta Graboski
- Museu de Zoologia da Universidade de São Paulo , Avenida Nazaré, Caixa Postal 42494, CEP 04218-070, São Paulo, São Paulo , Brazil
- Programa de Pós-Graduação em Zoologia, Universidade Estadual Paulista Júlio de Mesquita Filho , Avenida 24 A, Bela Vista, CEP 13506-900, Rio Claro, São Paulo , Brazil
- Laboratório de Herpetologia, Coordenação de Zoologia, Museu Paraense Emílio Goeldi , Avenida Perimetral, Terra Firme, Caixa Postal 399, CEP 66077-530, Belém, Pará , Brazil
| | - Juan C Arredondo
- Colecciones Biológicas de la Universidad CES (CBUCES), Facultad de Ciencias y Biotecnología, Universidad CES , Calle 10A, Medellín , Colombia
| | - Felipe G Grazziotin
- Laboratório de Coleções Zoológicas, Instituto Butantan , Avenida Vital Brasil, Butantã, São Paulo - SP, 05503-900 , Brazil
| | - Ricardo Arturo Guerra-Fuentes
- Laboratório de Herpetologia, Coordenação de Zoologia, Museu Paraense Emílio Goeldi , Avenida Perimetral, Terra Firme, Caixa Postal 399, CEP 66077-530, Belém, Pará , Brazil
- Faculdade de Ciências Naturais, Campus Universitário do Tocantins-Cametá, Universidade Federal do Pará, Travessa Padre Antônio Franco , 2617, Bairro da Matinha, CEP 68400-000 Cametá, Pará , Brazil
| | - Ariane A A Da Silva
- Instituto Nacional de Pesquisas da Amazônia, Programa de Coleções e Acervos Científicos , Avenida André de Araújo, CEP 69060-000, Manaus, Amazonas , Brazil
| | - Ana L C Prudente
- Laboratório de Herpetologia, Coordenação de Zoologia, Museu Paraense Emílio Goeldi , Avenida Perimetral, Terra Firme, Caixa Postal 399, CEP 66077-530, Belém, Pará , Brazil
| | - Roberta R Pinto
- Laboratório de Diversidade de Anfíbios e Répteis, Museu de Arqueologia e Ciências Naturais da Universidade Católica de Pernambuco, Universidade Católica de Pernambuco , Recife , Brazil
| | - Miguel T Rodrigues
- Universidade de São Paulo, Instituto de Biociências, Departamento de Zoologia , Caixa Postal 11.461, CEP 05508-090, São Paulo, SP , Brazil
| | - Sandro L Bonatto
- Laboratório de Biologia Genômica e Molecular, Escola de Ciências da Saúde e da Vida, Pontifícia Universidade Católica do Rio Grande do Sul , Avenida Ipiranga, CEP 90619-900, Porto Alegre, Rio Grande do Sul , Brazil
| | - Hussam Zaher
- Museu de Zoologia da Universidade de São Paulo , Avenida Nazaré, Caixa Postal 42494, CEP 04218-070, São Paulo, São Paulo , Brazil
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5
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Finn KT, Thorley J, Bensch HM, Zöttl M. Subterranean Life-Style Does Not Limit Long Distance Dispersal in African Mole-Rats. Front Ecol Evol 2022. [DOI: 10.3389/fevo.2022.879014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Dispersal from the natal site to breeding sites is a crucial phase in the life history of animals and can have profound effects on the reproductive ecology and the structure of animal societies. However, few studies have assessed dispersal dynamics in subterranean mammals and it is unknown whether dispersal distances are constrained by living underground. Here we show, in social, subterranean Damaraland mole-rats (Fukomys damarensis), that a subterranean lifestyle does not preclude long distance dispersal and that both sexes are capable of successfully dispersing long distances (>4 km). Body condition did not predict dispersal distance, but dispersers from larger groups traveled farther than individuals from smaller groups. Subsequently we show in a phylogenetically controlled comparative analysis of dispersal distances in subterranean and surface-dwelling rodents that living underground does not constrain dispersal distances and that dispersal capacity is mainly a consequence of body size in both lifestyles.
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6
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Medeiros MD, Galiano D, Kubiak BB, Roratto PA, de Freitas TRO. Genetic diversity and conservation of the endemic tuco-tuco Ctenomys ibicuiensis (Rodentia: Ctenomyidae). J Mammal 2020. [DOI: 10.1093/jmammal/gyaa119] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Abstract
Endemic, small range species are susceptible to environmental changes and landscape modification. Understanding genetic diversity and distributional patterns is important for implementation of effective conservation measures. In this context, genetic diversity was evaluated to update the conservation status of an endemic tuco-tuco, Ctenomys ibicuiensis. Phylogeographic and population genetic analyses of mitochondrial DNA and microsatellite loci were carried out using 46 individuals sampled across the species’ distribution. Ctenomys ibicuiensis presented moderate to high genetic diversity and highly structured populations with low levels of gene flow and isolation by distance. Anthropogenic landscape changes threaten this restricted-range tuco-tuco. Considering its limited geographic distribution and highly structured populations with low gene flow, we consider C. ibicuiensis to be at significant risk of extinction.
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Affiliation(s)
- Mayara Delagnelo Medeiros
- Programa de Pós-Graduação em Genética e Biologia Molecular – Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
| | - Daniel Galiano
- Universidade Federal da Fronteira Sul, Campus Realeza, Realeza, PR, Brazil
| | - Bruno Busnello Kubiak
- Programa de Pós-Graduação em Genética e Biologia Molecular – Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
| | - Paula Angélica Roratto
- Departamento de Ciências Naturais – Fundação Universidade Regional de Blumenau (FURB), Blumenau, SC, Brazil
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7
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Austrich A, Mora MS, Mapelli FJ, Fameli A, Kittlein MJ. Influences of landscape characteristics and historical barriers on the population genetic structure in the endangered sand-dune subterranean rodent Ctenomys australis. Genetica 2020; 148:149-164. [PMID: 32451787 DOI: 10.1007/s10709-020-00096-1] [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: 02/26/2019] [Accepted: 05/20/2020] [Indexed: 11/29/2022]
Abstract
Understanding the processes and patterns of local adaptation and migration involves an exhaustive knowledge of how landscape features and population distances shape the genetic variation at the geographical level. Ctenomys australis is an endangered subterranean rodent characterized by having a restricted geographic range immerse in a highly fragmented sand dune landscape in the Southeast of Buenos Aires province, Argentina. We use 13 microsatellite loci in a total of 194 individuals from 13 sampling sites to assess the dispersal patterns and population structure in the complete geographic range of this endemic species. Our analyses show that populations are highly structured with low rates of gene flow among them. Genetic differentiation among sampling sites was consistent with an isolation by distance pattern, however, an important fraction of the population differentiation was explained by natural barriers such as rivers and streams. Although the individuals were sampled at locations distanced from each other, we also use some landscape genetics approaches to evaluate the effects of landscape configuration on the genetic connectivity among populations. These analyses showed that the sand dune habitat availability (the most suitable habitat for the occupation of the species), was one of the main factors that explained the differentiation patterns of the different sampling sites located on both sides of the Quequén Salado River. Finally, habitat availability was directly associated with the width of the sand dune landscape in the Southeast of Buenos Aires province, finding the greatest genetic differentiation among the populations of the Northeast, where this landscape is narrower.
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Affiliation(s)
- Ailin Austrich
- Departamento de Biología, Facultad de Ciencias Exactas y Naturales, Instituto de Investigaciones Marinas y Costeras, (IIMyC, CONICET),, Universidad Nacional de Mar del Plata, Funes 3250, 3th Floor, 7600, Mar del Plata, Argentina.
| | - Matías S Mora
- Departamento de Biología, Facultad de Ciencias Exactas y Naturales, Instituto de Investigaciones Marinas y Costeras, (IIMyC, CONICET),, Universidad Nacional de Mar del Plata, Funes 3250, 3th Floor, 7600, Mar del Plata, Argentina
| | - Fernando J Mapelli
- Grupo de Genética y Ecología Para la Conservación de la Biodiversidad, Museo Argentino de Ciencias Naturales "Bernardino Rivadavia", CONICET, Ángel Gallardo 470, Buenos Aires, Argentina
| | - Alberto Fameli
- Grupo de Genética y Ecología Para la Conservación de la Biodiversidad, Museo Argentino de Ciencias Naturales "Bernardino Rivadavia", CONICET, Ángel Gallardo 470, Buenos Aires, Argentina
| | - Marcelo J Kittlein
- Departamento de Biología, Facultad de Ciencias Exactas y Naturales, Instituto de Investigaciones Marinas y Costeras, (IIMyC, CONICET),, Universidad Nacional de Mar del Plata, Funes 3250, 3th Floor, 7600, Mar del Plata, Argentina
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8
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Hybridization between subterranean tuco-tucos (Rodentia, Ctenomyidae) with contrasting phylogenetic positions. Sci Rep 2020; 10:1502. [PMID: 32001746 PMCID: PMC6992752 DOI: 10.1038/s41598-020-58433-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2019] [Accepted: 12/10/2019] [Indexed: 11/17/2022] Open
Abstract
Reproductive compatibility usually decreases according to increasing genetic difference and the time of divergence between species. However, the amount of modification required to influence hybridization may vary in different species. Thus, it is extremely important to conduct studies that seek to understand what and how variables influence the reproductive isolation of species. We have explored a system involving two species of subterranean rodents that present morphological, karyotypic, and evolutionary history differences and are capable of generating hybrids. To gain insight into the karyotype organization of genus Ctenomys, we examined the chromosome evolution by classical and molecular cytogenetics of both parental species and hybrids. Furthermore, we have used different approaches to analyze the differences between the parental species and the hybrids, and determined the origin of the hybrids. The results of our work demonstrate unequivocally that some species that present extensive differences in chromosome organization, phenotype, evolutionary history, sperm morphology and genetic, which are usually associated with reproductive isolation, can generate natural hybrids. The results also demonstrate that females of both species are able to generate hybrids with males of the other species. In addition, the chromosome-specific probes prepared from Ctenomys flamarioni provide an invaluable tool for comparative cytogenetics in closely related species.
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9
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Kubiak BB, Gutiérrez EE, Galiano D, Maestri R, Freitas TROD. Can Niche Modeling and Geometric Morphometrics Document Competitive Exclusion in a Pair of Subterranean Rodents (Genus Ctenomys) with Tiny Parapatric Distributions? Sci Rep 2017; 7:16283. [PMID: 29176709 PMCID: PMC5701118 DOI: 10.1038/s41598-017-16243-2] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2017] [Accepted: 10/27/2017] [Indexed: 11/12/2022] Open
Abstract
Species with similar ecological requirements coexisting in the same geographic region are prone to competitively exclude each other. Alternatively, they may coexist if character displacement acts to change the niche requirements of one or both species. We used two methodological approaches (ecological niche modeling [ENM] and geometric morphometrics) to test two hypotheses: given their behavioral, morphological, and ecological similarities, one species competitively excludes the other; and, character displacement enables their coexistence at two sites in which the species are known to occur in sympatry. The results from the ENM-based approach did not provide evidence for competitive exclusion; however, the morphometric analyses documented displacement in size of C. minutus. This result, suggests that C. minutus might exclude C. flamarioni from areas with softer soils and higher food availability. We stress the importance of using multiple methodological approaches when testing prediction of competitive exclusion. However, both methods had limited explanatory power given that the focal species possess truly peculiar distributions, being largely parapatric and restricted to narrow, small geographic areas with a strange distribution and there is a need to search for additional methods. We discuss the idiosyncrasy of the ENM-based approach when applied to organisms with subterranean habits.
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Affiliation(s)
- Bruno B Kubiak
- Programa de Pós-Graduação em Biologia Animal, Departamento de Zoologia Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves 9500, 91501-970, Porto Alegre, Brazil.
- Departamento de Ciências Biológicas da Universidade Regional Integrada do Alto Uruguai e das Missões - Campus de Frederico Westphalen, Av. Assis Brasil 709, 98400-000, Frederico Westphalen, Brazil.
| | - Eliécer E Gutiérrez
- Programa de Pós-Graduação em Biodiversidade Animal, Centro de Ciências Naturais e Exatas, Av. Roraima n. 1000, Universidade Federal de Santa Maria, Santa Maria, RS 97105-900, Brazil
- Programa Nacional de Pós Doutorado em Ecologia, Departamento de Zoologia, Instituto de Ciências Biológicas, Campus UnB, Universidade de Brasília, Asa Norte 70910-900, Brasília, DF, Brazil
- Division of Mammals, Department of Vertebrate Zoology, National Museum of Natural History, Smithsonian Institution, Washington, DC, USA
| | - Daniel Galiano
- Programa de Pós-Graduação em Ciências Ambientais - Universidade Comunitária da Região de Chapecó, - Avenida Senador Attílio Fontana, 591-E, CEP 89809-000, Chapecó, SC, Brazil
| | - Renan Maestri
- Programa de Pós-Graduação em Biologia Animal, Departamento de Zoologia Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves 9500, 91501-970, Porto Alegre, Brazil
| | - Thales R O de Freitas
- Programa de Pós-Graduação em Biologia Animal, Departamento de Zoologia Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves 9500, 91501-970, Porto Alegre, Brazil
- Programa de Pós-Graduação em Genética e Biologia Molecular, Departamento de Genética, Universidade Federal do Rio Grande do Sul - Av. Bento Gonçalves, 9500, CEP 91501-970, Porto Alegre, RS, Brazil
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10
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Hsu JL, Crawford JC, Tammone MN, Ramakrishnan U, Lacey EA, Hadly EA. Genomic data reveal a loss of diversity in two species of tuco-tucos (genus Ctenomys) following a volcanic eruption. Sci Rep 2017; 7:16227. [PMID: 29176629 PMCID: PMC5701162 DOI: 10.1038/s41598-017-16430-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2017] [Accepted: 11/03/2017] [Indexed: 11/28/2022] Open
Abstract
Marked reductions in population size can trigger corresponding declines in genetic variation. Understanding the precise genetic consequences of such reductions, however, is often challenging due to the absence of robust pre- and post-reduction datasets. Here, we use heterochronous genomic data from samples obtained before and immediately after the 2011 eruption of the Puyehue-Cordón Caulle volcanic complex in Patagonia to explore the genetic impacts of this event on two parapatric species of rodents, the colonial tuco-tuco (Ctenomys sociabilis) and the Patagonian tuco-tuco (C. haigi). Previous analyses using microsatellites revealed no post-eruption changes in genetic variation in C. haigi, but an unexpected increase in variation in C. sociabilis. To explore this outcome further, we used targeted gene capture to sequence over 2,000 putatively neutral regions for both species. Our data revealed that, contrary to the microsatellite analyses, the eruption was associated with a small but significant decrease in genetic variation in both species. We suggest that genome-level analyses provide greater power than traditional molecular markers to detect the genetic consequences of population size changes, particularly changes that are recent, short-term, or modest in size. Consequently, genomic analyses promise to generate important new insights into the effects of specific environmental events on demography and genetic variation.
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Affiliation(s)
- Jeremy L Hsu
- Department of Biology, Stanford University, Stanford, CA, USA.
- Chapman University, 92866, Orange, CA, USA.
| | - Jeremy Chase Crawford
- Museum of Vertebrate Zoology and Department of Integrative Biology, University of California, Berkeley, CA, USA
| | - Mauro N Tammone
- Programa de Estudios Aplicados a la Conservación (CENAC-PNNH, CONICET), Bariloche, Río Negro, Argentina
| | | | - Eileen A Lacey
- Museum of Vertebrate Zoology and Department of Integrative Biology, University of California, Berkeley, CA, USA
| | - Elizabeth A Hadly
- Department of Biology, Stanford University, Stanford, CA, USA
- Senior Fellow, Woods Institute for the Environment, Stanford University, Stanford, CA, USA
- Senior Fellow, Center for Innovation in Global Health, Stanford University, Stanford, CA, USA
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11
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Kubiak BB, Maestri R, Borges LR, Galiano D, de Freitas TRO. Interspecific interactions may not influence home range size in subterranean rodents: a case study of two tuco-tuco species (Rodentia: Ctenomyidae). J Mammal 2017. [DOI: 10.1093/jmammal/gyx138] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Mora MS, Mapelli FJ, López A, Gómez Fernández MJ, Mirol PM, Kittlein MJ. Landscape genetics in the subterranean rodent Ctenomys "chasiquensis" associated with highly disturbed habitats from the southeastern Pampas region, Argentina. Genetica 2017; 145:575-591. [PMID: 28905157 DOI: 10.1007/s10709-017-9983-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2015] [Accepted: 09/07/2017] [Indexed: 11/29/2022]
Abstract
Studies of genetic differentiation in fragmented environments help us to identify those landscape features that most affect gene flow and dispersal patterns. Particularly, the assessment of the relative significance of intrinsic biological and environmental factors affecting the genetic structure of populations becomes crucial. In this work, we assess the current dispersal patterns and population structure of Ctenomys "chasiquensis", a vulnerable and endemic subterranean rodent distributed on a small area in Central Argentina, using 9 polymorphic microsatellite loci. We use landscape genetics approaches to assess the relationship between genetic connectivity among populations and environmental attributes. Our analyses show that populations of C. "chasiquensis" are moderately to highly structured at a regional level. This pattern is most likely the outcome of substantial gene flow on the more homogeneous sand dune habitat of the Northwest of its distributional range, in conjunction with an important degree of isolation of eastern and southwestern populations, where the optimal habitat is surrounded by a highly fragmented landscape. Landscape genetics analysis suggests that habitat quality and longitude were the environmental factors most strongly associated with genetic differentiation/uniqueness of populations. In conclusion, our results indicate an important genetic structure in this species, even at a small spatial scale, suggesting that contemporary habitat fragmentation increases population differentiation.
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Affiliation(s)
- Matías Sebastián Mora
- Departamento de Biología, Facultad de Ciencias Exactas y Naturales, Instituto de Investigaciones Marinas y Costeras, (IIMyC, CONICET), Universidad Nacional de Mar del Plata, Funes 3250, 3rd floor, 7600, Mar del Plata, Argentina.
| | - Fernando J Mapelli
- Departamento de Biología, Facultad de Ciencias Exactas y Naturales, Instituto de Investigaciones Marinas y Costeras, (IIMyC, CONICET), Universidad Nacional de Mar del Plata, Funes 3250, 3rd floor, 7600, Mar del Plata, Argentina
| | - Aldana López
- Área de Recursos Naturales, CONICET INTA EEA Bariloche, CC 277 8400, Bariloche, Río Negro, Argentina
| | - María Jimena Gómez Fernández
- Grupo de Genética y Ecología en Conservación y Biodiversidad, Museo Argentino de Ciencias Naturales "Bernardino Rivadavia", CONICET, Ángel Gallardo 470, Buenos Aires, Argentina
| | - Patricia M Mirol
- Grupo de Genética y Ecología en Conservación y Biodiversidad, Museo Argentino de Ciencias Naturales "Bernardino Rivadavia", CONICET, Ángel Gallardo 470, Buenos Aires, Argentina
| | - Marcelo J Kittlein
- Departamento de Biología, Facultad de Ciencias Exactas y Naturales, Instituto de Investigaciones Marinas y Costeras, (IIMyC, CONICET), Universidad Nacional de Mar del Plata, Funes 3250, 3rd floor, 7600, Mar del Plata, Argentina
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Hsu JL, Kam S, Tammone MN, Lacey EA, Hadly EA. Rapid increase in genetic diversity in an endemic Patagonian tuco-tuco following a recent volcanic eruption. J Mammal 2017. [DOI: 10.1093/jmammal/gyx008] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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14
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Mora MS, Mapelli FJ, López A, Fernández MJG, Mirol PM, Kittlein MJ. Population genetic structure and historical dispersal patterns in the subterranean rodent Ctenomys “chasiquensis” from the southeastern Pampas region, Argentina. Mamm Biol 2016. [DOI: 10.1016/j.mambio.2016.02.008] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Lopes CM, De Barba M, Boyer F, Mercier C, da Silva Filho PJS, Heidtmann LM, Galiano D, Kubiak BB, Langone P, Garcias FM, Gielly L, Coissac E, de Freitas TRO, Taberlet P. DNA metabarcoding diet analysis for species with parapatric vs sympatric distribution: a case study on subterranean rodents. Heredity (Edinb) 2015; 114:525-36. [PMID: 25649502 PMCID: PMC4815513 DOI: 10.1038/hdy.2014.109] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2014] [Revised: 10/22/2014] [Accepted: 10/27/2014] [Indexed: 11/09/2022] Open
Abstract
Closely related sympatric species commonly develop different ecological strategies to avoid competition. Ctenomys minutus and C. flamarioni are subterranean rodents parapatrically distributed in the southern Brazilian coastal plain, showing a narrow sympatric zone. To gain understanding on food preferences and possible competition for food resources, we evaluated their diet composition performing DNA metabarcoding analyzes of 67 C. minutus and 100 C. flamarioni scat samples, collected along the species geographical ranges. Thirteen plant families, mainly represented by Poaceae, Araliaceae, Asteraceae and Fabaceae, were identified in the diet of C. minutus. For C. flamarioni, 10 families were recovered, with a predominance of Poaceae, Araliaceae and Asteraceae. A significant correlation between diet composition and geographical distance was detected in C. minutus, whereas the diet of C. flamarioni was quite homogeneous throughout its geographical distribution. No significant differences were observed between males and females of each species. However, differences in diet composition between species were evident according to multivariate analysis. Our results suggest some level of diet partitioning between C. flamarioni and C. minutus in the sympatric region. While the first species is more specialized on few plant items, the second showed a more varied and heterogeneous diet pattern among individuals. These differences might have been developed to avoid competition in the region of co-occurrence. Resource availability in the environment also seems to influence food choices. Our data indicate that C. minutus and C. flamarioni are generalist species, but that some preference for Poaceae, Asteraceae and Araliaceae families can be suggested for both rodents.
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Affiliation(s)
- C M Lopes
- Laboratoire d'Ecologie Alpine, CNRS-UMR 5553, Université Joseph Fourier, Grenoble, France
| | - M De Barba
- Laboratoire d'Ecologie Alpine, CNRS-UMR 5553, Université Joseph Fourier, Grenoble, France
| | - F Boyer
- Laboratoire d'Ecologie Alpine, CNRS-UMR 5553, Université Joseph Fourier, Grenoble, France
| | - C Mercier
- Laboratoire d'Ecologie Alpine, CNRS-UMR 5553, Université Joseph Fourier, Grenoble, France
| | - P J S da Silva Filho
- Departamento de Botânica, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - L M Heidtmann
- Laboratório de Citogenética e Evolução, Departamento de Genética, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - D Galiano
- Laboratório de Citogenética e Evolução, Departamento de Genética, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - B B Kubiak
- Laboratório de Citogenética e Evolução, Departamento de Genética, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - P Langone
- Laboratório de Citogenética e Evolução, Departamento de Genética, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - F M Garcias
- Laboratório de Citogenética e Evolução, Departamento de Genética, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - L Gielly
- Laboratoire d'Ecologie Alpine, CNRS-UMR 5553, Université Joseph Fourier, Grenoble, France
| | - E Coissac
- Laboratoire d'Ecologie Alpine, CNRS-UMR 5553, Université Joseph Fourier, Grenoble, France
| | - T R O de Freitas
- Laboratório de Citogenética e Evolução, Departamento de Genética, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - P Taberlet
- Laboratoire d'Ecologie Alpine, CNRS-UMR 5553, Université Joseph Fourier, Grenoble, France
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Galiano D, Bernardo-Silva J, de Freitas TRO. Genetic pool information reflects highly suitable areas: the case of two parapatric endangered species of Tuco-tucos (Rodentia: Ctenomiydae). PLoS One 2014; 9:e97301. [PMID: 24819251 PMCID: PMC4018344 DOI: 10.1371/journal.pone.0097301] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2013] [Accepted: 04/18/2014] [Indexed: 11/19/2022] Open
Abstract
Conservation of small mammals requires knowledge of the genetically and ecologically meaningful spatial scales at which species respond to habitat modifications. Conservation strategies can be improved through the use of ecological niche models and genetic data to classify areas of high environmental suitability. In this study, we applied a Maxent model integrated with genetic information (nucleotide diversity, haplotype diversity and Fu's Fs neutrality tests) to evaluate potential genetic pool populations with highly suitable areas for two parapatric endangered species of tuco-tucos (Ctenomys minutus and C. lami). Our results demonstrated that both species were largely influenced by vegetation and soil variables at a landscape scale and inhabit a highly specific niche. Ctenomys minutus was also influenced by the variable altitude; the species was associated with low altitudes (sea level). Our model of genetic data associated with environmental suitability indicate that the genetic pool data were associated with highly suitable areas for C. minutus. This pattern was not evident for C. lami, but this outcome could be a consequence of the restricted range of the species. The preservation of species requires not only detailed knowledge of their natural history and genetic structure but also information on the availability of suitable areas where species can survive, and such knowledge can aid significantly in conservation planning. This finding reinforces the use of these two techniques for planning conservation actions.
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Affiliation(s)
- Daniel Galiano
- Programa de Pós-Graduação em Biologia Animal, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
- * E-mail:
| | - Jorge Bernardo-Silva
- Departamento de Genética, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Thales R. O. de Freitas
- Programa de Pós-Graduação em Biologia Animal, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
- Departamento de Genética, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
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Fasanella M, Bruno C, Cardoso Y, Lizarralde M. Historical demography and spatial genetic structure of the subterranean rodentCtenomys magellanicusin Tierra del Fuego (Argentina). Zool J Linn Soc 2013. [DOI: 10.1111/zoj.12067] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Mariana Fasanella
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET); Centro Regional de Estudios Genómicos; Fac. Cs. Exactas; Universidad Nacional de La Plata; Fcio. Varela Buenos Aires Argentina
| | - Cecilia Bruno
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET); Centro Regional de Estudios Genómicos; Fac. Cs. Exactas; Universidad Nacional de La Plata; Fcio. Varela Buenos Aires Argentina
| | - Yamila Cardoso
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET); Centro Regional de Estudios Genómicos; Fac. Cs. Exactas; Universidad Nacional de La Plata; Fcio. Varela Buenos Aires Argentina
| | - Marta Lizarralde
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET); Centro Regional de Estudios Genómicos; Fac. Cs. Exactas; Universidad Nacional de La Plata; Fcio. Varela Buenos Aires Argentina
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Mora MS, Cutrera AP, Lessa EP, Vassallo AI, D'Anatro A, Mapelli FJ. Phylogeography and population genetic structure of the Talas tuco-tuco (Ctenomys talarum): integrating demographic and habitat histories. J Mammal 2013. [DOI: 10.1644/11-mamm-a-242.1] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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Diversity of tuco-tucos (Ctenomys, Rodentia) in the Northeastern wetlands from Argentina: mitochondrial phylogeny and chromosomal evolution. Genetica 2012; 140:125-36. [DOI: 10.1007/s10709-012-9664-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2012] [Accepted: 06/22/2012] [Indexed: 10/28/2022]
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GONÇALVES GISLENEL, HOEKSTRA HOPIE, FREITAS THALESRO. Striking coat colour variation in tuco-tucos (Rodentia: Ctenomyidae): a role for the melanocortin-1 receptor? Biol J Linn Soc Lond 2012. [DOI: 10.1111/j.1095-8312.2011.01839.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Mapelli FJ, Mora MS, Mirol PM, Kittlein MJ. Effects of Quaternary climatic changes on the phylogeography and historical demography of the subterranean rodent Ctenomys porteousi. J Zool (1987) 2011. [DOI: 10.1111/j.1469-7998.2011.00849.x] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Mapelli FJ, Mora MS, Mirol PM, Kittlein MJ. Population structure and landscape genetics in the endangered subterranean rodent Ctenomys porteousi. CONSERV GENET 2011. [DOI: 10.1007/s10592-011-0273-2] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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FORNEL RODRIGO, CORDEIRO-ESTRELA PEDRO, DE FREITAS THALESRENATOO. Skull shape and size variation in Ctenomys minutus (Rodentia: Ctenomyidae) in geographical, chromosomal polymorphism, and environmental contexts. Biol J Linn Soc Lond 2010. [DOI: 10.1111/j.1095-8312.2010.01496.x] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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MIROL PATRICIA, GIMÉNEZ MABELD, SEARLE JEREMYB, BIDAU CLAUDIOJ, FAULKES CHRISG. Population and species boundaries in the South American subterranean rodent Ctenomys in a dynamic environment. Biol J Linn Soc Lond 2010. [DOI: 10.1111/j.1095-8312.2010.01409.x] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Mora MS, Mapelli FJ, Gaggiotti OE, Kittlein MJ, Lessa EP. Dispersal and population structure at different spatial scales in the subterranean rodent Ctenomys australis. BMC Genet 2010; 11:9. [PMID: 20109219 PMCID: PMC2828403 DOI: 10.1186/1471-2156-11-9] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2009] [Accepted: 01/28/2010] [Indexed: 11/24/2022] Open
Abstract
Background The population genetic structure of subterranean rodent species is strongly affected by demographic (e.g. rates of dispersal and social structure) and stochastic factors (e.g. random genetic drift among subpopulations and habitat fragmentation). In particular, gene flow estimates at different spatial scales are essential to understand genetic differentiation among populations of a species living in a highly fragmented landscape. Ctenomys australis (the sand dune tuco-tuco) is a territorial subterranean rodent that inhabits a relatively secure, permanently sealed burrow system, occurring in sand dune habitats on the coastal landscape in the south-east of Buenos Aires province, Argentina. Currently, this habitat is threatened by urban development and forestry and, therefore, the survival of this endemic species is at risk. Here, we assess population genetic structure and patterns of dispersal among individuals of this species at different spatial scales using 8 polymorphic microsatellite loci. Furthermore, we evaluate the relative importance of sex and habitat configuration in modulating the dispersal patterns at these geographical scales. Results Our results show that dispersal in C. australis is not restricted at regional spatial scales (~ 4 km). Assignment tests revealed significant population substructure within the study area, providing support for the presence of two subpopulations from three original sampling sites. Finally, male-biased dispersal was found in the Western side of our study area, but in the Eastern side no apparent philopatric pattern was found, suggesting that in a more continuous habitat males might move longer distances than females. Conclusions Overall, the assignment-based approaches were able to detect population substructure at fine geographical scales. Additionally, the maintenance of a significant genetic structure at regional (~ 4 km) and small (less than 1 km) spatial scales despite apparently moderate to high levels of gene flow between local sampling sites could not be explained simply by the linear distance among them. On the whole, our results support the hypothesis that males disperse more frequently than females; however they do not provide support for strict philopatry within females.
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Affiliation(s)
- Matías S Mora
- Laboratorio de Ecofisiología, Departamento de Biología, Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Mar del Plata, Casilla de Correo 1245, Mar del Plata, Argentina.
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Swatdipong A, Primmer CR, Vasemägi A. Historical and recent genetic bottlenecks in European grayling, Thymallus thymallus. CONSERV GENET 2009. [DOI: 10.1007/s10592-009-0031-x] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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Patzenhauerová H, Bryja J, Šumbera R. Kinship structure and mating system in a solitary subterranean rodent, the silvery mole-rat. Behav Ecol Sociobiol 2009. [DOI: 10.1007/s00265-009-0893-4] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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FERNANDES FABIANOARAUJO, FORNEL RODRIGO, CORDEIRO-ESTRELA PEDRO, FREITAS THALESRENATOO. Intra- and interspecific skull variation in two sister species of the subterranean rodent genusCtenomys(Rodentia, Ctenomyidae): coupling geometric morphometrics and chromosomal polymorphism. Zool J Linn Soc 2009. [DOI: 10.1111/j.1096-3642.2008.00428.x] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Fernandes FA, Fernández-Stolz GP, Lopes CM, Freitas TRO. The conservation status of the tuco-tucos, genus Ctenomys (Rodentia: Ctenomyidae), in southern Brazil. BRAZ J BIOL 2008; 67:839-47. [PMID: 18278350 DOI: 10.1590/s1519-69842007000500006] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2007] [Accepted: 10/05/2007] [Indexed: 11/22/2022] Open
Abstract
The goal of conservation biology should be related to the preservation of species and also to the evolutionary and ecological processes that were responsible to form them and that are still acting. We review the conservation status of the species of tuco-tuco (Ctenomys torquatus, C. lami, C. minutus, and C. flamarioni) from southern Brazil, and relate these data to the geological history of a particular area in that region, the Coastal Plain of the States of Rio Grande do Sul and Santa Catarina. The implications of the data on these species from the Southeastern Brazil are also discussed in relation to the evolution and risk of extinction of these subterranean rodents.
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Affiliation(s)
- F A Fernandes
- Departamento de Genética, Instituto de Biociências, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
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