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Lima JS, Collevatti RG, de Oliveira LK, Chaves LJ, Naves RV, Soares TN, Filho JAFD, de Campos Telles MP. Forecasting effects of climate changes on the population genetic structure of Anacardium occidentale in the Cerrado biome, Brazil. Genetica 2023; 151:357-367. [PMID: 37922114 DOI: 10.1007/s10709-023-00199-5] [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: 05/28/2023] [Accepted: 10/10/2023] [Indexed: 11/05/2023]
Abstract
There has been a continuous interest in understanding the patterns of genetic diversity in natural populations because of the role of intraspecific genetic diversity as the basis of all evolutionary change and thus, its potential effects on population persistence when facing environmental changes. Here, we provided the first description of genetic diversity distribution and population structure of Anacardium occidentale L. (cashew) from the Brazilian Cerrado, one of the most economically important tropical crops in the world. We applied Bayesian clustering approaches (STRUCTURE and POPS) that allow predicting the effects of future climatic changes on the population genetic structure of A. occidentale. We identified distinct genetic groups corresponding to the southwestern, central, and northern regions of the species' range. The characterized genetic clusters will disappear under future climate change scenarios, leading to a homogenization of genetic variability across the landscape. Our findings suggest a high likelihood for the loss of genetic diversity, which in turn will reduce the evolutionary potential of the species to cope with predicted future climatic changes. Results from this study may help develop management strategies to conserve the genetic diversity and structure of natural cashew populations.
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Affiliation(s)
| | - Rosane Garcia Collevatti
- Laboratório de Genética & Biodiversidade, Instituto de Ciências Biológicas (ICB), Universidade Federal de Goiás (UFG), Goiânia, GO, Brazil
| | | | | | | | - Thannya Nascimento Soares
- Laboratório de Genética & Biodiversidade, Instituto de Ciências Biológicas (ICB), Universidade Federal de Goiás (UFG), Goiânia, GO, Brazil
| | | | - Mariana Pires de Campos Telles
- Laboratório de Genética & Biodiversidade, Instituto de Ciências Biológicas (ICB), Universidade Federal de Goiás (UFG), Goiânia, GO, Brazil
- Escola de Ciências Médicas E da Vida, Pontifícia Universidade Católica de Goiás, Goiânia, GO, Brazil
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Muniz AC, de Oliveira Buzatti RS, de Lemos-Filho JP, Heuertz M, Nazareno AG, Lovato MB. Genomic signatures of ecological divergence between savanna and forest populations of a Neotropical tree. ANNALS OF BOTANY 2023; 132:523-540. [PMID: 37642427 PMCID: PMC10667007 DOI: 10.1093/aob/mcad120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/2023] [Accepted: 08/25/2023] [Indexed: 08/31/2023]
Abstract
BACKGROUND AND AIMS In eastern Neotropical South America, the Cerrado, a large savanna vegetation, and the Atlantic Forest harbour high biodiversity levels, and their habitats are rather different from each other. The biomes have intrinsic evolutionary relationships, with high lineage exchange that can be attributed, in part, to a large contact zone between them. The genomic study of ecotypes, i.e. populations adapted to divergent habitats, can be a model to study the genomic signatures of ecological divergence. Here, we investigated two ecotypes of the tree Plathymenia reticulata, one from the Cerrado and the other from the Atlantic Forest, which have a hybrid zone in the ecotonal zone of Atlantic Forest-Cerrado. METHODS The ecotypes were sampled in the two biomes and their ecotone. The evolutionary history of the divergence of the species was analysed with double-digest restriction site-associated DNA sequencing. The genetic structure and the genotypic composition of the hybrid zone were determined. Genotype-association analyses were performed, and the loci under putative selection and their functions were investigated. KEY RESULTS High divergence between the two ecotypes was found, and only early-generation hybrids were found in the hybrid zone, suggesting a partial reproductive barrier. Ancient introgression between the Cerrado and Atlantic Forest was not detected. The soil and climate were associated with genetic divergence in Plathymenia ecotypes and outlier loci were found to be associated with the stress response, with stomatal and root development and with reproduction. CONCLUSIONS The high genomic, ecological and morphophysiological divergence between ecotypes, coupled with partial reproductive isolation, indicate that the ecotypes represent two species and should be managed as different evolutionary lineages. We advise that the forest species should be re-evaluated and restated as vulnerable. Our results provide insights into the genomic mechanisms underlying the diversification of species across savanna and forest habitats and the evolutionary forces acting in the species diversification in the Neotropics.
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Affiliation(s)
- André Carneiro Muniz
- Departamento de Genética, Ecologia e Evolução, Universidade Federal de Minas Gerais, CP 486, Belo Horizonte, MG 31270-901, Brazil
| | | | - José Pires de Lemos-Filho
- Departamento de Botânica, Universidade Federal de Minas Gerais, Belo Horizonte, MG 31270-901, Brazil
| | - Myriam Heuertz
- Biogeco, INRAE, Univ. Bordeaux, 69 route d’Arcachon, 33610 Cestas, France
| | - Alison Gonçalves Nazareno
- Departamento de Genética, Ecologia e Evolução, Universidade Federal de Minas Gerais, CP 486, Belo Horizonte, MG 31270-901, Brazil
| | - Maria Bernadete Lovato
- Departamento de Genética, Ecologia e Evolução, Universidade Federal de Minas Gerais, CP 486, Belo Horizonte, MG 31270-901, Brazil
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Borges C, Bertassoni A, Liévano‐Latorre LF, Dória TAF, Santos‐Silva R, Miranda F, Barreto E. Safeguarding sloths and anteaters in the future: Priority areas for conservation under climate change. Biotropica 2022. [DOI: 10.1111/btp.13185] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Christielly Borges
- Laboratório de Ecologia Teórica e Síntese Universidade Federal de Goiás Goiânia Brazil
| | - Alessandra Bertassoni
- Theory, Metapopulation, and Landscape Ecology Lab Universidade Federal de Goiás Goiânia Brazil
| | | | | | - Rejane Santos‐Silva
- Laboratório de Biogeografia da Conservação Universidade Federal de Goiás Goiânia Brazil
| | | | - Elisa Barreto
- Laboratório de Ecologia Teórica e Síntese Universidade Federal de Goiás Goiânia Brazil
- Swiss Federal Institute for Forest, Snow and Landscape Birmensdorf Switzerland
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Comparative population genomics in Tabebuia alliance shows evidence of adaptation in Neotropical tree species. Heredity (Edinb) 2022; 128:141-153. [PMID: 35132209 PMCID: PMC8897506 DOI: 10.1038/s41437-021-00491-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2021] [Revised: 12/07/2021] [Accepted: 12/07/2021] [Indexed: 11/08/2022] Open
Abstract
The role of natural selection in shaping spatial patterns of genetic diversity in the Neotropics is still poorly understood. Here, we perform a genome scan with 24,751 probes targeting 11,026 loci in two Neotropical Bignoniaceae tree species: Handroanthus serratifolius from the seasonally dry tropical forest (SDTF) and Tabebuia aurea from savannas, and compared with the population genomics of H. impetiginosus from SDTF. OutFLANK detected 29 loci in 20 genes with selection signal in H. serratifolius and no loci in T. aurea. Using BayPass, we found evidence of selection in 335 loci in 312 genes in H. serratifolius, 101 loci in 92 genes in T. aurea, and 448 loci in 416 genes in H. impetiginosus. All approaches evidenced several genes affecting plant response to environmental stress and primary metabolic processes. The three species shared no SNPs with selection signal, but we found SNPs affecting the same gene in pair of species. Handroanthus serratifolius showed differences in allele frequencies at SNPs with selection signal among ecosystems, mainly between Caatinga/Cerrado and Atlantic Forest, while H. impetiginosus had one allele fixed across all populations, and T. aurea had similar allele frequency distribution among ecosystems and polymorphism across populations. Taken together, our results indicate that natural selection related to environmental stress shaped the spatial pattern of genetic diversity in the three species. However, the three species have different geographical distribution and niches, which may affect tolerances and adaption, and natural selection may lead to different signatures due to the differences in adaptive landscapes in different niches.
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Rech AR, Ollerton J, Dalsgaard B, Ré Jorge L, Sandel B, Svenning J, Baronio GJ, Sazima M. Population‐level plant pollination mode is influenced by Quaternary climate and pollinators. Biotropica 2021. [DOI: 10.1111/btp.12905] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- André Rodrigo Rech
- Programas de Pós‐graduação em Ciência Florestal e em Biologia Animal Universidade Federal dos Vales do Jequitinhonha e Mucuri Diamantina Brasil
| | - Jeff Ollerton
- Faculty of Arts, Science and Technology University of Northampton Northampton UK
| | - Bo Dalsgaard
- Center for Macroecology, Evolution and Climate GLOBE Institute University of Copenhagen Copenhagen Ø Denmark
| | - Leonardo Ré Jorge
- Department of Ecology Institute of Entomology Biology Centre of the Czech Academy of Sciences České Budějovice Czech Republic
| | - Brody Sandel
- Department of Biology Santa Clara University Santa Clara CA USA
| | - Jens‐Christian Svenning
- Center for Biodiversity Dynamics in a Changing World (BIOCHANGE) Department of Biology Aarhus University Aarhus C Denmark
- Departamento Section for Ecoinformatics & Biodiversity Department of Biology Aarhus University Aarhus C Denmark
| | - Gudryan J. Baronio
- Programas de Pós‐graduação em Ciência Florestal e em Biologia Animal Universidade Federal dos Vales do Jequitinhonha e Mucuri Diamantina Brasil
| | - Marlies Sazima
- Laboratório de Biologia Vegetal Instituto de Biologia Universidade Estadual de Campinas Campinas Brasil
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Muniz AC, Lemos-Filho JP, Souza HA, Marinho RC, Buzatti RS, Heuertz M, Lovato MB. The protected tree Dimorphandra wilsonii (Fabaceae) is a population of inter-specific hybrids: recommendations for conservation in the Brazilian Cerrado/Atlantic Forest ecotone. ANNALS OF BOTANY 2020; 126:191-203. [PMID: 32277237 PMCID: PMC7304468 DOI: 10.1093/aob/mcaa066] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2020] [Accepted: 04/09/2020] [Indexed: 06/01/2023]
Abstract
BACKGROUNDS AND AIMS Dimorphandra wilsonii Rizzini, a critically endangered and protected tree, has a restricted distribution in the ecotone between the Cerrado and the Atlantic Forest in south-eastern Brazil. In this area, it co-occurs with D. mollis Benth., a common tree from the Cerrado, and D. exaltata Schott., a rare tree from the Atlantic Forest. Previous studies of D. wilsonii indicated heterozygosity excess at the individual level. Field observation of some intermediate phenotypes between D. wilsonii and both congeners suggests hybridization of D. wilsonii with D. mollis and/or D. exaltata. Here, we tested the hypothesis that D. wilsonii may have originated from hybridization between D. exaltata and D. mollis. We also performed cytogenetic analysis to examine if the heterozygosity excess could be explained by polyploidy in D. wilsonii. METHODS We evaluated the genetic diversity and population structure of D. wilsonii using 11 nuclear simple sequence repeats (SSRs) genotyped in 152 individuals sampled across the taxon's range. We performed comparative genetic analyses using overlapping SSR markers between D. wilsonii and previously published SSR data in D. mollis and D. exaltata to subsequently perform a series of allelic comparisons, multivariate and Bayesian analysis. KEY RESULTS Our results suggest that D. wilsonii individuals are most likely to correspond to F1 hybrids between D. exaltata and D. mollis. Cytogenetic analysis indicated that D. wilsonii is diploid with the same chromosome number as D. mollis (2n = 2x = 28). CONCLUSIONS Our study raises questions about the taxonomic status and the evolutionary future of D. wilsonii. We suggest that the conservation and management strategy for D. wilsonii should be revised and that it should take into account both parental Dimorphandra species in the ecotone, with special emphasis on the threatened D. exaltata. Finally, this study highlights the value of genetic information for the design of conservation strategies.
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Affiliation(s)
- André Carneiro Muniz
- Departamento de Genética, Ecologia e Evolução, Universidade Federal de Minas Gerais, CP, Belo Horizonte, Brazil
| | - José Pires Lemos-Filho
- Departamento de Botânica, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Helena Augusta Souza
- Departamento de Genética, Ecologia e Evolução, Universidade Federal de Minas Gerais, CP, Belo Horizonte, Brazil
| | | | - Renata Santiago Buzatti
- Departamento de Genética, Ecologia e Evolução, Universidade Federal de Minas Gerais, CP, Belo Horizonte, Brazil
| | | | - Maria Bernadete Lovato
- Departamento de Genética, Ecologia e Evolução, Universidade Federal de Minas Gerais, CP, Belo Horizonte, Brazil
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Genetic variability and effective population size in Hymenaea stigonocarpa (Fabaceae) germplasm collection: tools for breeding programs and genetic conservation. Genetica 2019; 147:359-368. [PMID: 31552523 DOI: 10.1007/s10709-019-00076-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2018] [Accepted: 09/17/2019] [Indexed: 10/26/2022]
Abstract
The conservation of plant genetic resources is essential for breeding programs. Regarding the native species of the Brazilian Cerrado biome, many studies have demonstrated their high potential for use in both medicines and foods. Hymenaea stigonocarpa, a tree with wide occurrence in the Cerrado, has economic importance, and due its extractive use, the establishment of a breeding program is relevant for sustainable use and conservation. Thus, the first germplasm collection of the species was installed at the Federal University of Goiás (UFG). To know the magnitude of genetic variability and how it was distributed in the collection, 353 individuals, distributed in 119 families from 24 subpopulations collected in the Cerrado biome, were genotyped using capillary electrophoresis. Nine pairs of microsatellite markers were genotyped. The UFG germplasm collection showed a high level of genetic diversity (mean [Formula: see text] = 0.554) at the evaluated loci. By Analysis of Molecular Variance (AMOVA), a significant genetic structure was detected (θP = 0.152, p < 0.01), which was expected since the subpopulations that originated the germplasm collection were collected in geographically distant locations. In addition, the germplasm collection had a population effective size of 54.9 and presented an allelic representation of 79.89% compared to 32 natural subpopulations. These results demonstrate that the germplasm collection preserves a high genetic diversity of H. stigonocarpa with a population effective size considered sufficient for the conduction of a breeding program.
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Habitat preference differentiates the Holocene range dynamics but not barrier effects on two sympatric, congeneric trees (Tristaniopsis, Myrtaceae). Heredity (Edinb) 2019; 123:532-548. [PMID: 31243348 DOI: 10.1038/s41437-019-0243-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2018] [Revised: 05/25/2019] [Accepted: 05/29/2019] [Indexed: 11/08/2022] Open
Abstract
Niche partitioning can lead to differences in the range dynamics of plant species through its impacts on habitat availability, dispersal, or selection for traits that affect colonization and persistence. We investigated whether niche partitioning into upland and riparian habitats differentiates the range dynamics of two closely related and sympatric eastern Australian trees: the mountain water gum (Tristaniopsis collina) and the water gum (T. laurina). Using genomic data from SNP genotyping of 480 samples, we assessed the impact of biogeographic barriers and tested for signals of range expansion. Circuit theory was used to model isolation-by-resistance across three palaeo-environment scenarios: the Last Glacial Maximum, the Holocene Climate Optimum and present-day (1950-2014). Both trees showed similar genetic structure across historically dry barriers, despite evidence of significant environmental niche differentiation and different post-glacial habitat shifts. Tristaniopsis collina exhibits the signature of serial founder effects consistent with recent or rapid range expansion, whilst T. laurina has genetic patterns consistent with long-term persistence in geographically isolated populations despite occupying a broader bioclimatic niche. We found the minor influence of isolation-by-resistance on both species, though other unknown factors appear to shape genetic variation. We postulate that specialized recruitment traits (adapted to flood-disturbance regimes) rather than habitat availability limited post-glacial range expansion in T. laurina. Our findings indicate that niche breadth does not always facilitate range expansion through colonization and migration across barriers, though it can promote long-term persistence in situ.
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Genetic data improve the assessment of the conservation status based only on herbarium records of a Neotropical tree. Sci Rep 2019; 9:5693. [PMID: 30952869 PMCID: PMC6451013 DOI: 10.1038/s41598-019-41454-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2018] [Accepted: 03/07/2019] [Indexed: 11/30/2022] Open
Abstract
Although there is a consensus among conservation biologists about the importance of genetic information, the assessment of extinction risk and conservation decision-making generally do not explicitly consider this type of data. Genetic data can be even more important in species where little other information is available. In this study, we investigated a poorly known legume tree, Dimorphandra exaltata, from the Brazilian Atlantic Forest, a hotspot for conservation. We coupled species distribution models and geospatial assessment based on herbarium records with population genetic analyses to evaluate its genetic status and extinction risk, and to suggest conservation measures. Dimorphandra exaltata shows low genetic diversity, inbreeding, and genetic evidence of decrease in population size, indicating that the species is genetically depleted. Geospatial assessment classified the species as Endangered. Species distribution models projected a decrease in range size in the near future (2050). The genetic status of the species suggests low adaptive potential, which compromises its chances of survival in the face of ongoing climatic change. Altogether, our coupled analyses show that the species is even more threatened than indicated by geospatial analyses alone. Thus, conservation measures that take into account genetic data and the impacts of climate change in the species should be implemented.
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Lima NED, Carvalho AA, Lima-Ribeiro MS, Manfrin MH. Caracterização e história biogeográfica dos ecossistemas secos neotropicais. RODRIGUÉSIA 2018. [DOI: 10.1590/2175-7860201869445] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Resumo A região Neotropical, detentora da maior riqueza de espécies no globo, ocorre do México Central ao sul do Brasil. Neste trabalho, buscamos sumarizar as principais informações disponíveis na literatura que caracterizam os biomas neotropicais de Florestas Sazonalmente Seca (FTSS), Chaco e Savanas. Revisamos hipóteses biogeográficas concernentes a esses ambientes que buscam explicar sua dinâmica histórica. Nosso objetivo é oferecer uma caracterização desses biomas como etapa principal para o entendimento das principais hipóteses biogeográficas a eles associadas. Ainda que comporte como um cenário atraente para pesquisa, as espécies neotropicais são pouco estudas, sendo questões referentes a seus aspectos ecológicos, origem, história evolutiva e manutenção da elevada biodiversidade desconhecidas ou, ainda, pouco compreendidas. Embora, nossa revisão apresente pesquisas com diferentes pontos de vista quanto à dinâmica biogeográfica das formações vegetais, há consenso de que é produto de complexa interação entre os processos históricos, ecológicos e biológicos. Os estudos em biodiversidade de regiões ameaçadas, como os Neotrópicos, são norteadores para simulações e previsões de impactos, planos e estratégias de pesquisa.
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Collevatti RG, Rodrigues EE, Vitorino LC, Lima-Ribeiro MS, Chaves LJ, Telles MPC. Unravelling the genetic differentiation among varieties of the Neotropical savanna tree Hancornia speciosa Gomes. ANNALS OF BOTANY 2018; 122:973-984. [PMID: 29897397 PMCID: PMC6266125 DOI: 10.1093/aob/mcy060] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2017] [Accepted: 04/04/2018] [Indexed: 06/08/2023]
Abstract
Background and Aims Spatial distribution of species genetic diversity is often driven by geographical distance (isolation by distance) or environmental conditions (isolation by environment), especially under climate change scenarios such as Quaternary glaciations. Here, we used coalescent analyses coupled with ecological niche modelling (ENM), spatially explicit quantile regression analyses and the multiple matrix regression with randomization (MMRR) approach to unravel the patterns of genetic differentiation in the widely distributed Neotropical savanna tree, Hancornia speciosa (Apocynaceae). Due to its high morphological differentiation, the species was originally classified into six botanical varieties by Monachino, and has recently been recognized as only two varieties by Flora do Brasil 2020. Thus, H. speciosa is a good biological model for learning about evolution of phenotypic plasticity under genetic and ecological effects, and predicting their responses to changing environmental conditions. Methods We sampled 28 populations (777 individuals) of Monachino's four varieties of H. speciosa and used seven microsatellite loci to genotype them. Key Results Bayesian clustering showed five distinct genetic groups (K = 5) with high admixture among Monachino's varieties, mainly among populations in the central area of the species geographical range. Genetic differentiation among Monachino's varieties was lower than the genetic differentiation among populations within varieties, with higher within-population inbreeding. A high historical connectivity among populations of the central Cerrado shown by coalescent analyses may explain the high admixture among varieties. In addition, areas of higher climatic suitability also presented higher genetic diversity in such a way that the wide historical refugium across central Brazil might have promoted the long-term connectivity among populations. Yet, FST was significantly related to geographic distances, but not to environmental distances, and coalescent analyses and ENM predicted a demographical scenario of quasi-stability through time. Conclusions Our findings show that demographical history and isolation by distance, but not isolation by environment, drove genetic differentiation of populations. Finally, the genetic clusters do not support the two recently recognized botanical varieties of H. speciosa, but partially support Monachino's classification at least for the four sampled varieties, similar to morphological variation.
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Affiliation(s)
- Rosane G Collevatti
- Laboratório de Genética & Biodiversidade, Instituto de Ciências Biológicas, Universidade Federal de Goiás, Goiânia, GO, Brasil
| | - Eduardo E Rodrigues
- Laboratório de Genética & Biodiversidade, Instituto de Ciências Biológicas, Universidade Federal de Goiás, Goiânia, GO, Brasil
| | | | - Matheus S Lima-Ribeiro
- Laboratório de Macroecologia, Instituto de Biociências, Universidade Federal de Goiás (UFG), Regional Jataí, Jataí, GO, Brasil
| | - Lázaro J Chaves
- Escola de Agronomia, Universidade Federal de Goiás, Goiânia, GO, Brasil
| | - Mariana P C Telles
- Laboratório de Genética & Biodiversidade, Instituto de Ciências Biológicas, Universidade Federal de Goiás, Goiânia, GO, Brasil
- Escola de Ciências Agrárias e Biológicas, Pontifícia Universidade Católica de Goiás, Goiânia, GO, Brasil
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Leal BSS, Medeiros LR, Peres EA, Sobral-Souza T, Palma-Silva C, Romero GQ, Carareto CMA. Insights into the evolutionary dynamics of Neotropical biomes from the phylogeography and paleodistribution modeling of Bromelia balansae. AMERICAN JOURNAL OF BOTANY 2018; 105:1725-1734. [PMID: 30324691 DOI: 10.1002/ajb2.1167] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2018] [Accepted: 07/04/2018] [Indexed: 06/08/2023]
Abstract
PREMISE OF THE STUDY Historical abiotic and biotic factors have strongly affected species diversification and speciation. Although pre-Pleistocene events have been linked to the divergence of several Neotropical organisms, studies have highlighted a more prominent role of Pleistocene climatic oscillations in shaping current patterns of genetic variation of plants. METHODS We performed phylogeographic analyses based on plastidial markers and modeled the current distribution and paleodistribution of Bromelia balansae (Bromeliaceae), an herbaceous species with a wide geographical distribution in South America, to infer the processes underlying its evolutionary history. KEY RESULTS Combined molecular and paleodistributional modeling analyses indicated retraction during the Last Glacial Maximum followed by interglacial expansion. Populations occurring in the semideciduous Atlantic Forest and the Cerrado formed two distinct genetic clusters, which have been historically or ecologically isolated since late Pliocene to early Pleistocene. Populations located in the transition zone had higher levels of genetic diversity, as expected by the long-term climatic stability in the region detected in our ecological niche models. CONCLUSIONS Our study adds important information on how herbaceous species have been affected by past climate in Central and Southeast Brazil, helping to disentangle the complex processes that have triggered the evolution of Neotropical biota.
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Affiliation(s)
- Bárbara S S Leal
- Universidade Estadual Paulista (Unesp), Instituto de Biociências, Câmpus de Rio Claro, SP, 13506-900, Brazil
| | - Lilian R Medeiros
- Universidade Estadual Paulista (Unesp), Instituto de Biociências Letras e Ciências Exatas (Ibilce), Câmpus São José do Rio Preto, SP, 15054-000, Brazil
| | - Elen A Peres
- Universidade de São Paulo (USP), Instituto de Biociências, São Paulo, SP, 05508-090, Brazil
| | - Thadeu Sobral-Souza
- Universidade Estadual Paulista (Unesp), Instituto de Biociências, Câmpus de Rio Claro, SP, 13506-900, Brazil
| | - Clarisse Palma-Silva
- Universidade Estadual Paulista (Unesp), Instituto de Biociências, Câmpus de Rio Claro, SP, 13506-900, Brazil
- Universidade Estadual de Campinas (Unicamp), Instituto de Biologia, Campinas, SP, 13083-862, Brazil
| | - Gustavo Q Romero
- Universidade Estadual de Campinas (Unicamp), Instituto de Biologia, Campinas, SP, 13083-862, Brazil
| | - Claudia M A Carareto
- Universidade Estadual Paulista (Unesp), Instituto de Biociências Letras e Ciências Exatas (Ibilce), Câmpus São José do Rio Preto, SP, 15054-000, Brazil
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Buzatti RSDO, Pfeilsticker TR, de Magalhães RF, Bueno ML, Lemos-Filho JP, Lovato MB. Genetic and Historical Colonization Analyses of an Endemic Savanna Tree, Qualea grandiflora, Reveal Ancient Connections Between Amazonian Savannas and Cerrado Core. FRONTIERS IN PLANT SCIENCE 2018; 9:981. [PMID: 30065733 PMCID: PMC6056688 DOI: 10.3389/fpls.2018.00981] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2018] [Accepted: 06/15/2018] [Indexed: 06/02/2023]
Abstract
The evolutionary processes underlying the high diversity and endemism in the Cerrado, the most extensive Neotropical savanna, remain unclear, including the factors promoting the presence and evolution of savanna enclaves in the Amazon forest. In this study, we investigated the effects of past climate changes on genetic diversity, dynamics of species range and the historical connections between the savanna enclaves and Cerrado core for Qualea grandiflora, a tree species widely distributed in the biome. Totally, 40 populations distributed in the Cerrado core and Amazon savannas were analyzed using chloroplast and nuclear DNA sequences. We used phylogeographic, coalescent and ecological niche modeling approaches. Genetic data revealed a phylogeographic structure shaped by Pleistocene climatic oscillations. An eastern-western split in the Cerrado core was observed. The central portion of the Cerrado core harbored most of the sampled diversity for cpDNA. Ecological niche models predicted the presence of a large historical refuge in this region and multiple small refuges in peripheral areas. Relaxed Random Walk (RRW) models indicated the ancestral population in the north-western border of the central portion of the Cerrado core and cyclical dynamics of colonization related to Pleistocene climatic oscillations. Central and western ancient connections between Cerrado core and Amazonian savannas were observed. No evidence of connections among the Amazonian savannas was detected. Our study highlights the importance of Pleistocene climatic oscillations for structuring the genetic diversity of Q. grandiflora and complex evolutionary history of ecotonal areas in the Cerrado. Our results do not support the recent replacement of a large area in the Amazon forest by savanna vegetation. The Amazonian savannas appear to be fragmented and isolated from each other, evolving independently a long ago.
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Affiliation(s)
| | - Thais R. Pfeilsticker
- Departamento de Biologia Geral, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Rafael Félix de Magalhães
- Programa de Pós-Graduação em Zoologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Marcelo L. Bueno
- Departamento de Biologia Vegetal, Instituto de Ciências Biológicas, Universidade Federal de Viçosa, Viçosa, Brazil
| | - José P. Lemos-Filho
- Departamento de Botânica, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Maria B. Lovato
- Departamento de Biologia Geral, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
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Vitorino LC, Lima-Ribeiro MS, Terribile LC, Collevatti RG. Demographical expansion of Handroanthus ochraceus in the Cerrado during the Quaternary: implications for the genetic diversity of Neotropical trees. Biol J Linn Soc Lond 2018. [DOI: 10.1093/biolinnean/blx163] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Luciana Cristina Vitorino
- Laboratório de Genética & Biodiversidade, Instituto de Ciências Biológicas (ICB), Universidade Federal de Goiás (UFG), Goiânia, GO, Brazil
| | - Matheus S Lima-Ribeiro
- Laboratório de Macroecologia, Instituto de Biociências, Universidade Federal de Goiás (UFG), Jataí, GO, Brazil
| | - Levi Carina Terribile
- Laboratório de Macroecologia, Instituto de Biociências, Universidade Federal de Goiás (UFG), Jataí, GO, Brazil
| | - Rosane G Collevatti
- Laboratório de Genética & Biodiversidade, Instituto de Ciências Biológicas (ICB), Universidade Federal de Goiás (UFG), Goiânia, GO, Brazil
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15
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Khan G, Godoy MO, Franco FF, Perez MF, Taylor NP, Zappi DC, Machado MC, Moraes EM. Extreme population subdivision or cryptic speciation in the cactus Pilosocereus jauruensis? A taxonomic challenge posed by a naturally fragmented system. SYST BIODIVERS 2017. [DOI: 10.1080/14772000.2017.1359215] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Gulzar Khan
- Departamento de Biologia, Universidade Federal de São Carlos, Rodovia João Leme dos Santos km 110, 18052780 Sorocaba, São Paulo, Brazil
| | - Mariana O. Godoy
- Departamento de Biologia, Universidade Federal de São Carlos, Rodovia João Leme dos Santos km 110, 18052780 Sorocaba, São Paulo, Brazil
| | - Fernando F. Franco
- Departamento de Biologia, Universidade Federal de São Carlos, Rodovia João Leme dos Santos km 110, 18052780 Sorocaba, São Paulo, Brazil
| | - Manolo F. Perez
- Departamento de Biologia, Universidade Federal de São Carlos, Rodovia João Leme dos Santos km 110, 18052780 Sorocaba, São Paulo, Brazil
| | - Nigel P. Taylor
- Singapore Botanic Gardens, 1 Cluny Road, Singapore 259569, Singapore
| | - Daniela C. Zappi
- Museu Paraense Emílio Goeldi, Av. Perimetral, 1901, Belém, Pará, Brazil
| | - Marlon C. Machado
- Universidade Estadual de Feira de Santana, Rodovia BR 116, km 03, 44031-460 Feira de Santana, Bahia, Brazil
| | - Evandro M. Moraes
- Departamento de Biologia, Universidade Federal de São Carlos, Rodovia João Leme dos Santos km 110, 18052780 Sorocaba, São Paulo, Brazil
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Harrison S, Noss R. Endemism hotspots are linked to stable climatic refugia. ANNALS OF BOTANY 2017; 119:207-214. [PMID: 28064195 PMCID: PMC5321063 DOI: 10.1093/aob/mcw248] [Citation(s) in RCA: 87] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2016] [Revised: 10/27/2016] [Accepted: 11/09/2016] [Indexed: 05/05/2023]
Abstract
BACKGROUND Centres of endemism have received much attention from evolutionists, biogeographers, ecologists and conservationists. Climatic stability is often cited as a major reason for the occurrences of these geographic concentrations of species which are not found anywhere else. The proposed linkage between endemism and climatic stability raises unanswered questions about the persistence of biodiversity during the present era of rapidly changing climate. KEY QUESTIONS The current status of evidence linking geographic centres of endemism to climatic stability over evolutionary time was examined. The following questions were asked. Do macroecological analyses support such an endemism-stability linkage? Do comparative studies find that endemic species display traits reflecting evolution in stable climates? Will centres of endemism in microrefugia or macrorefugia remain relatively stable and capable of supporting high biological diversity into the future? What are the implications of the endemism-stability linkage for conservation? CONCLUSIONS Recent work using the concept of climate change velocity supports the classic idea that centres of endemism occur where past climatic fluctuations have been mild and where mountainous topography or favourable ocean currents contribute to creating refugia. Our knowledge of trait differences between narrow endemics and more widely distributed species remains highly incomplete. Current knowledge suggests that centres of endemism will remain relatively climatically buffered in the future, with the important caveat that absolute levels of climatic change and species losses in these regions may still be large.
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Affiliation(s)
- Susan Harrison
- Department of Environmental Science and Policy, University of California-Davis, Davis, CA, USA
| | - Reed Noss
- Department of Biology, University of Central Florida, Orlando, FL, USA
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