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Brook F, Tomasco IH, González B, Martin GM. A New Species of Ctenomys (Rodentia: Ctenomyidae) from Patagonia Related to C. sociabilis. J MAMM EVOL 2021. [DOI: 10.1007/s10914-021-09570-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Carnovale CS, Fernández GP, Merino ML, Mora MS. Redefining the Distributional Boundaries and Phylogenetic Relationships for Ctenomids From Central Argentina. Front Genet 2021; 12:698134. [PMID: 34422000 PMCID: PMC8372524 DOI: 10.3389/fgene.2021.698134] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Accepted: 07/06/2021] [Indexed: 11/13/2022] Open
Abstract
With about 68 recognized living species, subterranean rodents of the genus Ctenomys are found in a multiplicity of habitats, from the dunes of the Atlantic coast to the Andes Mountains, including environments ranging from humid steppes of Pampas to the dry deserts of Chaco region. However, this genus needs an exhaustive reevaluation of its systematic and phylogenetic relationships regarding the different groups that compose it. This knowledge is essential to propose biodiversity conservation strategies both at species level and at higher hierarchical levels. In order to clarify the taxonomy and the recent evolutionary history from populations of Ctenomys in the Pampas region, Argentina, phylogenetic relationships among them were evaluated using mitochondrial DNA sequences: gene encoding cytochrome b protein (1,140 bp) and the non-coding D-loop region (434 bp). To infer the divergence times inside the Ctenomys clade, a Bayesian calibrate tree using fossil remains data from different families within Caviomorpha was performed at first. Secondly, that calibration data was used as priors in a new Bayesian phylogenetic inference within the genus Ctenomys. This phylogenetic tree emphasized on species currently distributed on the Pampas region, more precisely considering both the talarum and mendocinus groups. Bayesian inferences (BI) were integrated with the results of a Maximum Likelihood approach (ML). Based on these results, the distributional limits of the mendocinus and talarum groups appear to be related to the physiognomy of the Pampas region soils. On the other hand, the validity of C. pundti complex as a differentiated species of C. talarum is debated. According to previous evidence from morphological and chromosomal studies, these results show a very low divergence between those species that originally were classified within the talarum group. Mitochondrial DNA sequences from populations associated with these putative species have not recovered as reciprocal monophyletic groups in the phylogenetic analyses. In conclusion, C. talarum and C. pundti complex might be considered as the same biological species, or lineages going through a recent or incipient differentiation process. The results obtained in this study have important implications for conservation policies and practices, since both species are currently categorized as Vulnerable and Endangered, respectively.
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Affiliation(s)
- Cecilia Soledad Carnovale
- Centro de Bioinvestigaciones (CeBio), Universidad Nacional del Noroeste de la Provincia de Buenos Aires (UNNOBA-CICBA) / Centro de Investigaciones y Transferencia del Noroeste de la Provincia de Buenos Aires CITNOBA (UNNOBA-CONICET), Pergamino, Argentina
| | - Gabriela Paula Fernández
- Centro de Bioinvestigaciones (CeBio), Universidad Nacional del Noroeste de la Provincia de Buenos Aires (UNNOBA-CICBA) / Centro de Investigaciones y Transferencia del Noroeste de la Provincia de Buenos Aires CITNOBA (UNNOBA-CONICET), Pergamino, Argentina
| | - Mariano Lisandro Merino
- Centro de Bioinvestigaciones (CeBio), Universidad Nacional del Noroeste de la Provincia de Buenos Aires (UNNOBA-CICBA) / Centro de Investigaciones y Transferencia del Noroeste de la Provincia de Buenos Aires CITNOBA (UNNOBA-CONICET), Pergamino, Argentina.,Comisión de Investigaciones Científicas de la Provincia de Buenos Aires (CICBA), La Plata, Argentina
| | - Matías Sebastián Mora
- Grupo de Investigación: Ecología y Genética de Poblaciones de Mamíferos, Instituto de Investigaciones Marinas y Costeras (IIMyC, CONICET), Universidad Nacional de Mar del Plata (UNMdP), Mar del Plata, Argentina
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García FJ, del Valle Alvarez MR. Morphological variation in bony structures of Hylaeamys seuanezi (Rodentia, Cricetidae, Sigmodontinae) in Southern Bahia, Brazil. MAMMALIA 2021. [DOI: 10.1515/mammalia-2021-0070] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Rodents of the genus Hylaeamys, are a group of cryptic species previously included in the Oryzomys capito complex. In Brazil are represented by six species, distributed in different biomes. However, the limits of their geographic distributions and taxonomy have not yet been well defined. In particular, the taxonomy for Hylaeamys seuanezi is unstable. Based on the analysis of bony structures and supported with geometric morphometric techniques, we characterize and compare the average shape from populations in four localities from Southern Bahia, Brazil. We review 145 individuals and we create morphological landmarks in skulls, mandibles, scapulae, and pelvis. In all the structures there were statistically significant differences between populations, in which the average shape from the Igrapiúna population was the most differentiated. Our results also showed differences between the pelvis of males and females, reporting for the first time sexual dimorphism for H. seuanezi. Finally, we provide a morphological diagnosis between the populations and postulate that such differences may be correlated with environmental and climatic factors that could be exerting negative pressures on H. seuanezi; as has been evidenced with other species of rodents and other mammals.
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Affiliation(s)
- Franger J. García
- Programa de Pós Graduação em Zoologia , Universidade Estadual de Santa Cruz (UESC) , Rodovia Jorge Amado, Km 16 , 45662-900 Salobrinho , Ilhéus , Bahia , Brasil
| | - Martín Roberto del Valle Alvarez
- Programa de Pós Graduação em Zoologia , Universidade Estadual de Santa Cruz (UESC) , Rodovia Jorge Amado, Km 16 , 45662-900 Salobrinho , Ilhéus , Bahia , Brasil
- Departamento de Ciências Biológicas , Universidade Estadual de Santa Cruz (UESC) , Rodovia Jorge Amado, Km 16 , 45662-900 Salobrinho , Ilhéus , Bahia , Brasil
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Austrich A, Kittlein MJ, Mora MS, Mapelli FJ. Potential distribution models from two highly endemic species of subterranean rodents of Argentina: which environmental variables have better performance in highly specialized species? Mamm Biol 2021. [DOI: 10.1007/s42991-021-00150-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Srinivasulu A, Assefa A, Srinivasulu C. Ecological niche modelling predicts significant impacts of future climate change on two endemic rodents in eastern Africa. JOURNAL OF THREATENED TAXA 2021. [DOI: 10.11609/jott.6715.13.5.18164-18176] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
The impact of climate change on rodents is well studied, however, many of these studies are restricted to the Americas. Small- to medium-sized rodents, especially murids, are restricted in their home range and microclimatic niche breadth, and are known to be more sensitive to changes in bioclimatic conditions over time. We analyzed the effect of future climatic scenarios in the near and distant future, using two global climate models (CanESM5 and MIROC-ES2L) for two shared socio-economic pathways (SSP2-4.5 and SSP5-8.5), on two eastern Africa endemic small-bodied mice: Stenocephalemys albipes and Mastomys awashensis. Our results indicate that while S. albipes showed increases in area of climatic suitability in the future, M. awashensis is predicted to suffer severe decline in the area of its fundamental niche.
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Lopes CM, De Barba M, Boyer F, Mercier C, Galiano D, Kubiak BB, Maestri R, da Silva Filho PJS, Gielly L, Coissac E, de Freitas TRO, Taberlet P. Ecological specialization and niche overlap of subterranean rodents inferred from DNA metabarcoding diet analysis. Mol Ecol 2020; 29:3144-3154. [PMID: 32654383 DOI: 10.1111/mec.15549] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2019] [Revised: 06/20/2020] [Accepted: 07/08/2020] [Indexed: 01/20/2023]
Abstract
Knowledge of how animal species use food resources available in the environment can increase our understanding of many ecological processes. However, obtaining this information using traditional methods is difficult for species feeding on a large variety of food items in highly diverse environments. We amplified the DNA of plants for 306 scat and 40 soil samples, and applied an environmental DNA metabarcoding approach to investigate food preferences, degree of diet specialization and diet overlap of seven herbivore rodent species of the genus Ctenomys distributed in southern and midwestern Brazil. The metabarcoding approach revealed that these species consume more than 60% of the plant families recovered in soil samples, indicating generalist feeding habits of ctenomyids. The family Poaceae was the most common food resource retrieved in scats of all species as well in soil samples. Niche overlap analysis indicated high overlap in the plant families and molecular operational taxonomic units consumed, mainly among the southern species. Interspecific differences in diet composition were influenced, among other factors, by the availability of resources in the environment. In addition, our results provide support for the hypothesis that the allopatric distributions of ctenomyids allow them to exploit the same range of resources when available, possibly because of the absence of interspecific competition.
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Affiliation(s)
- Carla Martins Lopes
- Laboratoire d'Écologie Alpine, UMR 5553, CNRS, Université Savoie Mont Blanc, Université Grenoble Alpes, Grenoble, France
| | - Marta De Barba
- Laboratoire d'Écologie Alpine, UMR 5553, CNRS, Université Savoie Mont Blanc, Université Grenoble Alpes, Grenoble, France
| | - Frédéric Boyer
- Laboratoire d'Écologie Alpine, UMR 5553, CNRS, Université Savoie Mont Blanc, Université Grenoble Alpes, Grenoble, France
| | - Céline Mercier
- Laboratoire d'Écologie Alpine, UMR 5553, CNRS, Université Savoie Mont Blanc, Université Grenoble Alpes, Grenoble, France
| | - Daniel Galiano
- Laboratório de Citogenética e Evolução, Departamento de Genética, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Bruno Busnello Kubiak
- Laboratório de Citogenética e Evolução, Departamento de Genética, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Renan Maestri
- Laboratório de Citogenética e Evolução, Departamento de Genética, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | | | - Ludovic Gielly
- Laboratoire d'Écologie Alpine, UMR 5553, CNRS, Université Savoie Mont Blanc, Université Grenoble Alpes, Grenoble, France
| | - Eric Coissac
- Laboratoire d'Écologie Alpine, UMR 5553, CNRS, Université Savoie Mont Blanc, Université Grenoble Alpes, Grenoble, France
| | | | - Pierre Taberlet
- Laboratoire d'Écologie Alpine, UMR 5553, CNRS, Université Savoie Mont Blanc, Université Grenoble Alpes, Grenoble, France
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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: 1.5] [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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Conservation status, protected area coverage of Ctenomys (Rodentia, Ctenomyidae) species and molecular identification of a population in a national park. Mamm Biol 2020. [DOI: 10.1007/s42991-019-00004-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Gutiérrez EE, Heming NM, Penido G, Dalponte JC, Lacerda ACR, Moratelli R, Bubadué JDM, da Silva LH, Wolf MM, Marinho-Filho J. Climate change and its potential impact on the conservation of the Hoary Fox, Lycalopex vetulus (Mammalia: Canidae). Mamm Biol 2019. [DOI: 10.1016/j.mambio.2019.08.002] [Citation(s) in RCA: 5] [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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Velasco JA, González-Salazar C. Akaike information criterion should not be a “test” of geographical prediction accuracy in ecological niche modelling. ECOL INFORM 2019. [DOI: 10.1016/j.ecoinf.2019.02.005] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Benedict BD, Castellanos AA, Light JE. Phylogeographic assessment of the Heermann’s kangaroo rat (Dipodomys heermanni). J Mammal 2018. [DOI: 10.1093/jmammal/gyy166] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Affiliation(s)
- Bridgett D Benedict
- Department of Wildlife and Fisheries Sciences, Texas A&M University, College Station, TX 77843, USA
| | - Adrian A Castellanos
- Department of Wildlife and Fisheries Sciences, Texas A&M University, College Station, TX 77843, USA
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