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Mairal M, Caujapé-Castells J, Pellissier L, Jaén-Molina R, Álvarez N, Heuertz M, Sanmartín I. A tale of two forests: ongoing aridification drives population decline and genetic diversity loss at continental scale in Afro-Macaronesian evergreen-forest archipelago endemics. ANNALS OF BOTANY 2018; 122:1005-1017. [PMID: 29905771 PMCID: PMC6266103 DOI: 10.1093/aob/mcy107] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/30/2017] [Accepted: 05/25/2018] [Indexed: 05/24/2023]
Abstract
BACKGROUND AND AIMS Various studies and conservationist reports have warned about the contraction of the last subtropical Afro-Macaronesian forests. These relict vegetation zones have been restricted to a few oceanic and continental islands around the edges of Africa, due to aridification. Previous studies on relict species have generally focused on glacial effects on narrow endemics; however, little is known about the effects of aridification on the fates of previously widespread subtropical lineages. METHODS Nuclear microsatellites and ecological niche modelling were used to understand observed patterns of genetic diversity in two emblematic species, widely distributed in these ecosystems: Canarina eminii (a palaeoendemic of the eastern Afromontane forests) and Canarina canariensis (a palaeoendemic of the Canarian laurel forests). The software DIYABC was used to test alternative demographic scenarios and an ensemble method was employed to model potential distributions of the selected plants from the end of the deglaciation to the present. KEY RESULTS All the populations assessed experienced a strong and recent population decline, revealing that locally widespread endemisms may also be alarmingly threatened. CONCLUSIONS The detected extinction debt, as well as the extinction spiral to which these populations are subjected, demands urgent conservation measures for the unique, biodiversity-rich ecosystems that they inhabit.
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Affiliation(s)
- Mario Mairal
- Real Jardín Botánico (RJB), CSIC, Plaza de Murillo, Madrid, Spain
- Departamento de Biodiversidad Molecular y Banco de ADN, Jardín Botánico ‘Viera y Clavijo’ – Unidad Asociada CSIC (Cabildo de Gran Canaria), Las Palmas de Gran Canaria, Spain
| | - Juli Caujapé-Castells
- Departamento de Biodiversidad Molecular y Banco de ADN, Jardín Botánico ‘Viera y Clavijo’ – Unidad Asociada CSIC (Cabildo de Gran Canaria), Las Palmas de Gran Canaria, Spain
| | - Loïc Pellissier
- Landscape Ecology, Institute of Terrestrial Ecosystems, ETH Zürich, Zürich, Switzerland
- Swiss Federal Research Institute WSL, Birmensdorf, Switzerland
| | - Ruth Jaén-Molina
- Departamento de Biodiversidad Molecular y Banco de ADN, Jardín Botánico ‘Viera y Clavijo’ – Unidad Asociada CSIC (Cabildo de Gran Canaria), Las Palmas de Gran Canaria, Spain
| | - Nadir Álvarez
- Department of Ecology and Evolution, Institute of Biology, University of Lausanne, Biophore Dorigny, Lausanne, Switzerland
| | | | - Isabel Sanmartín
- Real Jardín Botánico (RJB), CSIC, Plaza de Murillo, Madrid, Spain
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Detry C, Cardoso JL, Heras Mora J, Bustamante-Álvarez M, Silva AM, Pimenta J, Fernandes I, Fernandes C. Did the Romans introduce the Egyptian mongoose (Herpestes ichneumon) into the Iberian Peninsula? Naturwissenschaften 2018; 105:63. [PMID: 30311012 DOI: 10.1007/s00114-018-1586-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2018] [Revised: 08/23/2018] [Accepted: 09/19/2018] [Indexed: 11/28/2022]
Abstract
New finds of bones of the Egyptian Mongoose (Herpestes ichneumon), one from Portugal and one from Spain, were directly 14C dated to the first century AD. While the Portuguese specimen was found without connection to the Chalcolithic occupation of the Pedra Furada cave where it was recovered, the Spanish find, collected in the city of Mérida, comes from a ritual pit that also contained three human and 40 dog burials. The finds reported here show that the Egyptian mongoose, contrary to the traditional and predominant view, did not first arrive in the Iberian Peninsula during the Muslim occupation of Iberia. Instead, our findings are consistent with the hypothesis that the species was first introduced by the Romans, or at least sometime during the Roman occupation of Hispania. Therefore, radiocarbon dating of new archaeological finds of bones of the Egyptian Mongoose (Herpestes ichneumon) in the Iberian Peninsula push back the confirmed presence of the species in the region by approximately eight centuries, as the previously oldest dated record is from the ninth century. With these new dates, there are now a total of four 14C dated specimens of Egyptian mongooses from the Iberian Peninsula, and all of these dates fall within the last 2000 years. This offers support for the hypothesis that the presence of the species in Iberia is due to historical introductions and is at odds with a scenario of natural sweepstake dispersal across the Straits of Gibraltar in the Late Pleistocene (126,000-11,700 years ago), recently proposed based on genetic data.
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Affiliation(s)
- Cleia Detry
- UNIARQ-Centro de Arqueologia da Universidade de Lisboa, Faculdade de Letras da Universidade de Lisboa, Lisbon, Portugal.
| | - João Luís Cardoso
- UNIARQ-Centro de Arqueologia da Universidade de Lisboa, Faculdade de Letras da Universidade de Lisboa, Lisbon, Portugal.,Universidade Aberta, Lisbon, Portugal.,ICArEHB, Faculdade das Ciências Humanas e Sociais, Universidade do Algarve, Faro, Portugal
| | | | - Macarena Bustamante-Álvarez
- Departamento de Prehistoria y Arqueología. Facultad de Filosofía y Letras, Universidad de Granada, Granada, Spain
| | - Ana Maria Silva
- UNIARQ-Centro de Arqueologia da Universidade de Lisboa, Faculdade de Letras da Universidade de Lisboa, Lisbon, Portugal.,Laboratório de Préhistória, CIAS-Centro de Investigação em Antropologia e Saúde, Departamento Ciências da Vida, Universidade de Coimbra, Coimbra, Portugal
| | - João Pimenta
- UNIARQ-Centro de Arqueologia da Universidade de Lisboa, Faculdade de Letras da Universidade de Lisboa, Lisbon, Portugal.,Município de Vila Franca de Xira, Vila Franca de Xira, Portugal
| | | | - Carlos Fernandes
- CE3C-Centre for Ecology, Evolution and Environmental Changes, Faculdade de Ciências da Universidade de Lisboa, Lisbon, Portugal
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Nayak PP, Prakash J. Molecular Characterization of the Indigenous Stingless Bees (Tetragonula spp. Complex) Using ISSR Marker from Southern Peninsular India. NEOTROPICAL ENTOMOLOGY 2018; 47:106-117. [PMID: 28725990 DOI: 10.1007/s13744-017-0538-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2016] [Accepted: 06/19/2017] [Indexed: 06/07/2023]
Abstract
India is a country bestowed enormously with stingless bees, but genetic information about them is extremely minimal. This study focused to tap the geographic allocation, genetic variability, and differentiation among Tetragonula species complexes from natural and semi-urban habitats. Genetic analyses were assessed among 36 contrasting genotypes utilizing 20 ISSR primers. The dual combination exquisitely and productively amplified 245 DNA fragments at the loci, of which 240 bands were polymorphic (97.95%). Low to moderate level of genetic differentiation was detected from different estimators (Ht 0.29, G' STest 0.16, D est 0.072, F ST 0.14, and Nm 2.68). Hierarchical clustering analysis aided to partition the individual genotypes into its respective five species group formed, aided by substantial bootstrap support values, but differing under morphological identification. It also provided valuable insight into the moderate eco-genetic diversity (H 0.39) prevailing from geographically scattered inhabitants. Potential exploitation of hyper-variable ISSR marker turned out fairly as a promising technique for finding valid polymorphisms and infers relevant variations. This baseline information enhances our understanding of the genetic status of the indigenous species from the country.
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Affiliation(s)
- P P Nayak
- Centre for Applied Genetics, Dept of Zoology, Jnanabharathi Campus, Bangalore Univ, Bangalore, India.
- Centre for Environmental Information System, Environmental Management & Policy Research Institute, "Hasiru Bhavana", Doresanipalya Forest Campus, Vinayakanagara Circle, J.P. Nagar 5th Phase, Bangalore, Karnataka, 560 078, India.
| | - J Prakash
- Centre for Applied Genetics, Dept of Zoology, Jnanabharathi Campus, Bangalore Univ, Bangalore, India
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Jones KE, Pérez-Espona S, Reyes-Betancort JA, Pattinson D, Caujapé-Castells J, Hiscock SJ, Carine MA. Why do different oceanic archipelagos harbour contrasting levels of species diversity? The macaronesian endemic genus Pericallis (Asteraceae) provides insight into explaining the 'Azores diversity Enigma'. BMC Evol Biol 2016; 16:202. [PMID: 27717307 PMCID: PMC5055660 DOI: 10.1186/s12862-016-0766-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2016] [Accepted: 09/27/2016] [Indexed: 11/30/2022] Open
Abstract
Background Oceanic archipelagos typically harbour extensive radiations of flowering plants and a high proportion of endemics, many of which are restricted to a single island (Single Island Endemics; SIEs). The Azores represents an anomaly as overall levels of endemism are low; there are few SIEs and few documented cases of intra-archipelago radiations. The distinctiveness of the flora was first recognized by Darwin and has been referred to as the ‘Azores Diversity Enigma’ (ADE). Diversity patterns in the Macaronesian endemic genus Pericallis (Asteraceae) exemplify the ADE. In this study we used morphometric, Amplified Length Polymorphisms, and bioclimatic data for herbaceous Pericallis lineages endemic to the Azores and the Canaries, to test two key hypotheses proposed to explain the ADE: i) that it is a taxonomic artefact or Linnean shortfall, ie. the under description of taxa in the Azores or the over-splitting of taxa in the Canaries and (ii) that it reflects the greater ecological homogeneity of the Azores, which results in limited opportunity for ecological diversification compared to the Canaries. Results In both the Azores and the Canaries, morphological patterns were generally consistent with current taxonomic classifications. However, the AFLP data showed no genetic differentiation between the two currently recognized Azorean subspecies that are ecologically differentiated. Instead, genetic diversity in the Azores was structured geographically across the archipelago. In contrast, in the Canaries genetic differentiation was mostly consistent with morphology and current taxonomic treatments. Both Azorean and Canarian lineages exhibited ecological differentiation between currently recognized taxa. Conclusions Neither a Linnean shortfall nor the perceived ecological homogeneity of the Azores fully explained the ADE-like pattern observed in Pericallis. Whilst variation in genetic data and morphological data in the Canaries were largely congruent, this was not the case in the Azores, where genetic patterns reflected inter-island geographical isolation, and morphology reflected intra-island bioclimatic variation. The combined effects of differences in (i) the extent of geographical isolation, (ii) population sizes and (iii) geographical occupancy of bioclimatic niche space, coupled with the morphological plasticity of Pericallis, may all have contributed to generating the contrasting patterns observed in the archipelagos. Electronic supplementary material The online version of this article (doi:10.1186/s12862-016-0766-1) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- K E Jones
- Botanischer Garten und Botanisches Museum Berlin-Dahlem, Dahlem Centre of Plant Sciences, Freie Universität Berlin, Königin-Luise Str. 6-8, Berlin, 14195, Germany.
| | - S Pérez-Espona
- Estación Biológica de Doñana, CSIC, C./ Américo Vespucio s/n, Sevilla, E-41092, Spain
| | - J A Reyes-Betancort
- Jardín de Aclimatación de La Oratava (ICIA), C/Retama 2, Puerto de la Cruz, Tenerife, 38400, Spain
| | - D Pattinson
- Natural History Museum, Cromwell Road, London, SE7 5ED, UK.,Present address: Department of Zoology, University of Cambridge, Downing Street, Cambridge, CB2 3EJ, UK
| | - J Caujapé-Castells
- Jardín Botánico Canario "Viera y Clavijo"-Unidad Asociada al CSIC (Cabildo de Gran Canaria), Camino del palmeral 15 (Tafira Alta), Las Palmas de Gran Canaria, 35017, Spain
| | - S J Hiscock
- Department of Plant Sciences, University of Oxford, South Parks Road, Oxford, OX1 3RB, UK
| | - M A Carine
- Natural History Museum, Cromwell Road, London, SE7 5ED, UK
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Mairal M, Sanmartín I, Aldasoro JJ, Culshaw V, Manolopoulou I, Alarcón M. Palaeo-islands as refugia and sources of genetic diversity within volcanic archipelagos: the case of the widespread endemicCanarina canariensis(Campanulaceae). Mol Ecol 2015; 24:3944-63. [DOI: 10.1111/mec.13282] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2015] [Revised: 06/16/2015] [Accepted: 06/17/2015] [Indexed: 12/13/2022]
Affiliation(s)
- M. Mairal
- Real Jardín Botánico (RJB-CSIC); 28014 Madrid Spain
| | - I. Sanmartín
- Real Jardín Botánico (RJB-CSIC); 28014 Madrid Spain
| | - J. J. Aldasoro
- Institut Botànic de Barcelona (IBB-CSIC-ICUB); 08038 Barcelona Spain
| | - V. Culshaw
- Real Jardín Botánico (RJB-CSIC); 28014 Madrid Spain
| | | | - M. Alarcón
- Institut Botànic de Barcelona (IBB-CSIC-ICUB); 08038 Barcelona Spain
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de Paz JP, Caujapé-Castells J. A review of the allozyme data set for the Canarian endemic flora: causes of the high genetic diversity levels and implications for conservation. ANNALS OF BOTANY 2013; 111:1059-73. [PMID: 23609020 PMCID: PMC3662517 DOI: 10.1093/aob/mct076] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2012] [Accepted: 02/19/2013] [Indexed: 05/08/2023]
Abstract
Background and Aims Allozyme and reproductive data sets for the Canarian flora are updated in order to assess how the present levels and structuring of genetic variation have been influenced by the abiotic island traits and by phylogenetically determined biotic traits of the corresponding taxa; and in order to suggest conservation guidelines. Methods Kruskal-Wallis tests are conducted to assess the relationships of 27 variables with genetic diversity (estimated by A, P, Ho and He) and structuring (GST) of 123 taxa representing 309 populations and 16 families. Multiple linear regression analyses (MLRAs) are carried out to determine the relative influence of the less correlated significant abiotic and biotic factors on the genetic diversity levels. Key Results and Conclusions The interactions between biotic features of the colonizing taxa and the abiotic island features drive plant diversification in the Canarian flora. However, the lower weight of closeness to the mainland than of (respectively) high basic chromosome number, partial or total self-incompatibility and polyploidy in the MLRAs indicates substantial phylogenetic constraint; the importance of a high chromosome number is feasibly due to the generation of a larger number of linkage groups, which increase gametic and genotypic diversity. Genetic structure is also more influenced by biotic factors (long-range seed dispersal, basic chromosome number and partial or total self-incompatibility) than by distance to the mainland. Conservation-wise, genetic structure estimates (FST/GST) only reflect endangerment under intensive population sampling designs, and neutral genetic variation levels do not directly relate to threat status or to small population sizes. Habitat protection is emphasized, but the results suggest the need for urgent implementation of elementary reproductive studies in all cases, and for ex situ conservation measures for the most endangered taxa, even without prior studies. In non-endangered endemics, multidisciplinary research is needed before suggesting case-specific conservation strategies. The molecular information relevant for conservation should be conserved in a standardized format to facilitate further insight.
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Affiliation(s)
| | - Juli Caujapé-Castells
- Jardín Botánico Canario ‘Viera y Clavijo’-Unidad Asociada CSIC, Cabildo de Gran Canaria. Camino al Palmeral 15, 35017 Las Palmas de Gran Canaria, Spain
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Chloroplast phylogeography of Helianthemum songaricum (Cistaceae) from northwestern China: implications for preservation of genetic diversity. CONSERV GENET 2011. [DOI: 10.1007/s10592-011-0250-9] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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