scholarly journals Parallel diversifications of Cremastosperma and Mosannona (Annonaceae), tropical rainforest trees tracking Neogene upheaval of South America

2018 ◽  
Vol 5 (1) ◽  
pp. 171561 ◽  
Author(s):  
Michael D. Pirie ◽  
Paul J. M. Maas ◽  
Rutger A. Wilschut ◽  
Heleen Melchers-Sharrott ◽  
Lars W. Chatrou
Keyword(s):  
South America ◽  
Biological Diversity ◽  
Niche Differentiation ◽  
Molecular Dating ◽  
Central American ◽  
Niche Modelling ◽  
Independent Evidence ◽  
History Of ◽  
Lowland Rainforest ◽  
The Impact

Much of the immense present day biological diversity of Neotropical rainforests originated from the Miocene onwards, a period of geological and ecological upheaval in South America. We assess the impact of the Andean orogeny, drainage of Lake Pebas and closure of the Panama isthmus on two clades of tropical trees ( Cremastosperma , ca 31 spp.; and Mosannona , ca 14 spp.; both Annonaceae). Phylogenetic inference revealed similar patterns of geographically restricted clades and molecular dating showed diversifications in the different areas occurred in parallel, with timing consistent with Andean vicariance and Central American geodispersal. Ecological niche modelling approaches show phylogenetically conserved niche differentiation, particularly within Cremastosperma . Niche similarity and recent common ancestry of Amazon and Guianan Mosannona species contrast with dissimilar niches and more distant ancestry of Amazon, Venezuelan and Guianan species of Cremastosperma , suggesting that this element of the similar patterns of disjunct distributions in the two genera is instead a biogeographic parallelism, with differing origins. The results provide further independent evidence for the importance of the Andean orogeny, the drainage of Lake Pebas, and the formation of links between South and Central America in the evolutionary history of Neotropical lowland rainforest trees.

scholarly journals Parallel diversifications of Cremastosperma and Mosannona (Annonaceae), tropical rainforest trees tracking Neogene upheaval of the South American continent

2017 ◽  
Author(s):  
Michael D. Pirie ◽  
Paul J. M. Maas ◽  
Rutger A. Wilschut ◽  
Heleen Melchers-Sharrott ◽  
Lars W. Chatrou
Keyword(s):  
South America ◽  
Biological Diversity ◽  
Molecular Dating ◽  
Niche Modelling ◽  
Apparent Contradiction ◽  
Independent Evidence ◽  
Humid Forest ◽  
The Andes ◽  
High Dispersal ◽  
The Impact

AbstractThis preprint has been reviewed and recommended by Peer Community In Evolutionary Biology (http://dx.doi.org/10.24072/pci.evolbiol.100033). Much of the immense present day biological diversity of Neotropical rainforests originated from the Miocene onwards, a period of geological and ecological upheaval in South America. We assess the impact of the Andean orogeny, drainage of lake Pebas, and closure of the Panama Isthmus on two clades of trees (Cremastosperma, c. 31 spp.; and Mosannona, c. 14 spp.; both Annonaceae) found in humid forest distributed across the transition zones between the Andes and Western (lowland) Amazonia and between Central and South America. We inferred phylogenies based on c. 80% of recognised species of each clade using plastid and nuclear encoded sequence markers, revealing similar patterns of geographically restricted clades. Using molecular dating we showed that diversifications in the different areas occurred in parallel, with timing consistent with Andean vicariance and Central American geodispersal. In apparent contradiction of high dispersal abilities of rainforest trees, Cremastosperma clades within Amazonia are also geographically restricted, with a southern/montane clade that appears to have diversified along the foothills of the Andes sister to one of more northern/lowland species that diversified in a region once inundated by lake Pebas. Ecological niche modelling approaches show phylogenetically conserved niche differentiation, particularly within Cremastosperma. Niche similarity and recent common ancestry of Amazon and Guianan Mosannona species contrasts with dissimilar niches and more distant ancestry of Amazon, Venezuelan and Guianan species of Cremastosperma suggesting that this element of the similar patterns of disjunct distributions in the two genera is instead a biogeographic parallelism, with differing origins. The results provide further independent evidence for the importance of the Andean orogeny, the drainage of Lake Pebas, and the formation of links between South and Central America in the evolutionary history of Neotropical lowland rainforest trees.

scholarly journals The role of Central American barriers in shaping the evolutionary history of the northernmost glassfrog,Hyalinobatrachium fleischmanni(Anura: Centrolenidae)

PeerJ ◽  
2019 ◽  
Vol 7 ◽  
pp. e6115 ◽  
Author(s):  
Angela M. Mendoza ◽  
Wilmar Bolívar-García ◽  
Ella Vázquez-Domínguez ◽  
Roberto Ibáñez ◽  
Gabriela Parra Olea
Keyword(s):  
Genetic Structure ◽  
Central America ◽  
Population Expansion ◽  
Central American ◽  
Fault System ◽  
Mountain Range ◽  
Amphibian Species ◽  
Biogeographic History ◽  
History Of ◽  
The Impact

The complex geological history of Central America has been useful for understanding the processes influencing the distribution and diversity of multiple groups of organisms. Anurans are an excellent choice for such studies because they typically exhibit site fidelity and reduced movement. The objective of this work was to identify the impact of recognized geographic barriers on the genetic structure, phylogeographic patterns and divergence times of a wide-ranging amphibian species,Hyalinobatrachium fleischmanni. We amplified three mitochondrial regions, two coding (COI and ND1) and one ribosomal (16S), in samples collected from the coasts of Veracruz and Guerrero in Mexico to the humid forests of Chocó in Ecuador. We examined the biogeographic history of the species through spatial clustering analyses (Geneland and sPCA), Bayesian and maximum likelihood reconstructions, and spatiotemporal diffusion analysis. Our data suggest a Central American origin ofH. fleischmanniand two posterior independent dispersals towards North and South American regions. The first clade comprises individuals from Colombia, Ecuador, Panama and the sister speciesHyalinobatrachium tatayoi; this clade shows little structure, despite the presence of the Andes mountain range and the long distances between sampling sites. The second clade consists of individuals from Costa Rica, Nicaragua, and eastern Honduras with no apparent structure. The third clade includes individuals from western Honduras, Guatemala, and Mexico and displays deep population structure. Herein, we synthesize the impact of known geographic areas that act as barriers to glassfrog dispersal and demonstrated their effect of differentiatingH. fleischmanniinto three markedly isolated clades. The observed genetic structure is associated with an initial dispersal event from Central America followed by vicariance that likely occurred during the Pliocene. The southern samples are characterized by a very recent population expansion, likely related to sea-level and climatic oscillations during the Pleistocene, whereas the structure of the northern clade has probably been driven by dispersal through the Isthmus of Tehuantepec and isolation by the Motagua–Polochic–Jocotán fault system and the Mexican highlands.

scholarly journals Recent and Rapid Radiation of the Highly Endangered Harlequin Frogs (Atelopus) into Central America Inferred from Mitochondrial DNA Sequences

Diversity ◽  
2020 ◽  
Vol 12 (9) ◽  
pp. 360
Author(s):  
Juan Ramírez ◽  
César Jaramillo ◽  
Erik Lindquist ◽  
Andrew Crawford ◽  
Roberto Ibáñez
Keyword(s):  
Mitochondrial Dna ◽  
South America ◽  
Central America ◽  
Dna Sequences ◽  
Central American ◽  
Tree Model ◽  
South American Species ◽  
Biogeographic History ◽  
Museum Samples ◽  
History Of

Populations of amphibians are experiencing severe declines worldwide. One group with the most catastrophic declines is the Neotropical genus Atelopus (Anura: Bufonidae). Many species of Atelopus have not been seen for decades and all eight Central American species are considered “Critically Endangered”, three of them very likely extinct. Nonetheless, the taxonomy, phylogeny, and biogeographic history of Central American Atelopus are still poorly known. In this study, the phylogenetic relationships among seven of the eight described species in Central America were inferred based on mitochondrial DNA sequences from 103 individuals, including decades-old museum samples and two likely extinct species, plus ten South American species. Among Central American samples, we discovered two candidate species that should be incorporated into conservation programs. Phylogenetic inference revealed a ladderized topology, placing species geographically furthest from South America more nested in the tree. Model-based ancestral area estimation supported either one or two colonization events from South America. Relaxed-clock analysis of divergence times indicated that Atelopus colonized Central America prior to 4 million years ago (Ma), supporting a slightly older than traditional date for the closure of the Isthmus. This study highlights the invaluable role of museum collections in documenting past biodiversity, and these results could guide future conservation efforts. An abstract in Spanish (Resumen) is available as supplementary material.

When phylogeography meets niche suitability to unravel the evolutionary history of a shrub from the Brazilian Atlantic Forest

2020 ◽  
Vol 195 (1) ◽  
pp. 77-92
Author(s):  
Geraldo Mäder ◽  
Priscilla M Zamberlan ◽  
Ana Lucia A Segatto ◽  
João R Stehmann ◽  
Sandro L Bonatto ◽  
...  
Keyword(s):  
Atlantic Forest ◽  
Climate Changes ◽  
Brazilian Atlantic Forest ◽  
Niche Modelling ◽  
Nuclear Markers ◽  
Pleistocene Climate ◽  
History Of ◽  
Demographic Methods ◽  
Climate Influences ◽  
The Impact

Abstract The Brazilian Atlantic Forest (BAF) is one of the most impacted biomes in the world, and in this region, there are several examples of the effects of Pleistocene climate changes among the species found there. Athenaea fasciculata (Solanaceae) is a forest component distributed mainly throughout the BAF extension. Here, we investigated the genetic diversity and population structure of A. fasciculata based on plastid and nuclear markers, aiming to better understand the impact of Pleistocene climate changes on BAF vegetation. We used population genetics, demographic methods and ecological niche modelling coupled to an evolutionary approach to describe the species distribution across time. The phylogeographic analysis of A. fasciculata indicated that Pleistocene climate changes played an important role in its evolution. The species is structured in two groups of populations that emerged from different refugia and were under different climate influences, supporting previously proposed connections between the Atlantic and Amazon Forests, the two most important Neotropical rainforests.

scholarly journals Las polacas w Buenos Aires: prostytutki w historii i kulturze

2021 ◽  
Vol 21 ◽  
pp. 272-290
Author(s):  
Agata Draus-Kłobucka
Keyword(s):  
South America ◽  
Media Coverage ◽  
Historical Context ◽  
Sociological Research ◽  
Eastern European ◽  
White Slavery ◽  
Visual Texts ◽  
Anti Semitism ◽  
History Of ◽  
The Impact

The article discusses the literary and cultural uses of so-called white slavery – the prostitution and pimping in the Americas (especially in South America) of women from Eastern Europe at the turn of the 19th and 20th centuries. This motif, tragically linking the history of Poland and Argentina, is associated with historiographic, literary, and sociological research. The article analyses various attitudes of historians towards the issue and the scope of ideological issues (in particular, the issue of anti-Semitism) and criticises the impact of the specificity of media coverage on the sensational nature of reports on the white slave trade. The main aim of the work is to present to the Polish reader both the historical context and the literary and cultural realisations of the subject in a multi-faceted manner, especially since only a few works have been translated into Polish. The second goal is to identify repetitions in prose, dramas, and audio-visual texts depicting the stories of Eastern European prostitutes in South America.

scholarly journals Women Neuroscientist Disciples of Pío del Río-Hortega: the Cajal School Spreads in Europe and South America

2021 ◽  
Vol 15 ◽  
Author(s):  
Cristina Nombela ◽  
Emilio Fernández-Egea ◽  
Elena Giné ◽  
Yulia Worbe ◽  
Juan del Río-Hortega Bereciartu ◽  
...  
Keyword(s):  
South America ◽  
History Of Neuroscience ◽  
History Of ◽  
Del Rio ◽  
The Impact

Pio del Rio-Hortega was not only the discoverer of the microglia and oligodendroglia but also possibly the most prolific mentor of all Santiago Ramon y Cajal’s disciples (Nobel awardee in Physiology or Medicine 1906 and considered as the father of modern Neuroscience). Among Río-Hortega’s mentees, three exceptional women are frequently forgotten, chronologically: Pio’s niece Asunción Amo del Río who worked with Río-Hortega at Madrid, Paris, and Oxford; the distinguished British neuropathologist Dorothy Russell who also worked with Don Pío at Oxford; and Amanda Pellegrino de Iraldi, the last mentee in his career. Our present work analyzes the figures of these three women who were in contact and collaborated with Don Pío del Río-Hortega, describing the influences received and the impact on their careers and the History of Neuroscience. The present work completes the contribution of women neuroscientists who worked with Cajal and his main disciples of the Spanish Neurological School both in Spain (previous work) and in other countries (present work).

scholarly journals The Experience on Earthquake Risk in Central America

1977 ◽  
Vol 9 (3) ◽  
pp. 306-316
Keyword(s):  
South America ◽  
Central America ◽  
Seismic Activity ◽  
Volcanic Eruptions ◽  
Central American ◽  
Earthquake Risk ◽  
History Of ◽  
The Caribbean ◽  
North And South America ◽  
North And South

Presented by the Central American Actuarial Association (Asociacion Acturial Centroamericana) to the 13th ASTIN Colloquium.The Asociaciôn Actuarial Centroamericana (AAC) is a grouping of Actuaries from the Central American Republics of El Salvador, Guatemala, Honduras, Nicaragua, Costa Rica and Panama. The AAC is a contributing ASTIN member of the International Actuarial Association.Earthquakes have been a constant scourge of mankind. Central America has not escaped this phenomenon, indeed the territory has been most affected by them precisely because of its condition as an isthmus that serves as a fragile union between the continental land masses of North and South America, and in consequence being subject to disturbances by the displacement of the continental plates. Our lands abound with beautiful volcanoes, which have also contributed to local seismic activity. Whatever their origin, the earthquakes that have struck our country have left their share of destruction of lives and property.In Annex 1 a table is presented, showing a history of seismic activity and volcanic eruptions in the countries on the Caribbean Platform, in which we can appreciate in detail the catastrophes that occurred from the XVI Century until 1976.

scholarly journals Freemasonry in Colombia (18th-19th centuries): French or continental origin, leading Freemasons, the Catholic Church, political parties and revolutionary elements in South America

Perseitas ◽  
2020 ◽  
Vol 9 ◽  
pp. 1
Author(s):  
Milton Arrieta-López
Keyword(s):  
Political Parties ◽  
South America ◽  
Catholic Church ◽  
Critical Analysis ◽  
Nation State ◽  
History Of ◽  
Continental Origin ◽  
The 19Th Century ◽  
The Impact ◽  
The Catholic Church

The history of Colombian Freemasonry can be divided into three clearly identifiable stages, this work focused on the first historical stage characterized by the influence of continental European Freemasonry. This article analyzed the essence of French freemasonry on the origin of the Colombian nation-state. The impact of operative or patriotic lodges in South America was reviewed in general, as well as the relations between the Catholic Church and the 19th-century leading freemasons. The methodology used is documentary review, bibliographic and critical analysis when consulting, reviewing and analyzing reference sources. The article attempts to gauge the scope of the masonic influence on the process of independence from Spain, and it arrives at the conclusion that without the intervention of masonic elements the revolutionary goals would not have materialized in the way they did.

Investigating the Relationship Between Self-Esteem and Stigma Among Young Adults With History of Suicide Attempts

Crisis ◽  
2016 ◽  
Vol 37 (4) ◽  
pp. 265-270 ◽  
Author(s):  
Meshan Lehmann ◽  
Matthew R. Hilimire ◽  
Lawrence H. Yang ◽  
Bruce G. Link ◽  
Jordan E. DeVylder
Keyword(s):  
Young Adults ◽  
Suicide Attempts ◽  
Self Esteem ◽  
High Risk Population ◽  
High Functioning ◽  
People With Mental Illness ◽  
History Of ◽  
The Individual ◽  
The Impact ◽  
The Relationship

Abstract. Background: Self-esteem is a major contributor to risk for repeated suicide attempts. Prior research has shown that awareness of stigma is associated with reduced self-esteem among people with mental illness. No prior studies have examined the association between self-esteem and stereotype awareness among individuals with past suicide attempts. Aims: To understand the relationship between stereotype awareness and self-esteem among young adults who have and have not attempted suicide. Method: Computerized surveys were administered to college students (N = 637). Linear regression analyses were used to test associations between self-esteem and stereotype awareness, attempt history, and their interaction. Results: There was a significant stereotype awareness by attempt interaction (β = –.74, p = .006) in the regression analysis. The interaction was explained by a stronger negative association between stereotype awareness and self-esteem among individuals with past suicide attempts (β = –.50, p = .013) compared with those without attempts (β = –.09, p = .037). Conclusion: Stigma is associated with lower self-esteem within this high-functioning sample of young adults with histories of suicide attempts. Alleviating the impact of stigma at the individual (clinical) or community (public health) levels may improve self-esteem among this high-risk population, which could potentially influence subsequent suicide risk.

Sign in / Sign up

Export Citation Format

Share Document