scholarly journals Multilocus phylogeny and historical biogeography of Hypostomus shed light on the processes of fish diversification in La Plata Basin

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Yamila P. Cardoso ◽  
Luiz Jardim de Queiroz ◽  
Ilham A. Bahechar ◽  
Paula E. Posadas ◽  
Juan I. Montoya-Burgos
Keyword(s):  
Middle Miocene ◽  
Drainage Pattern ◽  
Ecological Diversification ◽  
La Plata ◽  
La Plata Basin ◽  
History Of ◽  
Dispersal Corridors ◽  
Shed Light ◽  
Strong Barrier ◽  
Multilocus Phylogeny

AbstractDistribution history of the widespread Neotropical genus Hypostomus was studied to shed light on the processes that shaped species diversity. We inferred a calibrated phylogeny, ancestral habitat preference, ancestral areas distribution, and the history of dispersal and vicariance events of this genus. The phylogenetic and distribution analyses indicate that Hypostomus species inhabiting La Plata Basin do not form a monophyletic clade, suggesting that several unrelated ancestral species colonized this basin in the Miocene. Dispersal to other rivers of La Plata Basin started about 8 Mya, followed by habitat shifts and an increased rate of cladogenesis. Amazonian Hypostomus species colonized La Plata Basin several times in the Middle Miocene, probably via the Upper Paraná and the Paraguay rivers that acted as dispersal corridors. During the Miocene, La Plata Basin experienced marine incursions, and geomorphological and climatic changes that reconfigured its drainage pattern, driving dispersal and diversification of Hypostomus. The Miocene marine incursion was a strong barrier and its retraction triggered Hypostomus dispersal, increased speciation rate and ecological diversification. The timing of hydrogeological changes in La Plata Basin coincides well with Hypostomus cladogenetic events, indicating that the history of this basin has acted on the diversification of its biota.

scholarly journals Multilocus phylogeny and historical biogeography of Hypostomus shed light on the processes of fish diversification in La Plata Basin

2020 ◽  
Author(s):  
Yamila P. Cardoso ◽  
Luiz Jardim de Queiroz ◽  
Ilham A. Bahechar ◽  
Paula E. Posadas ◽  
Juan I. Montoya-Burgos
Keyword(s):  
Middle Miocene ◽  
Monophyletic Clade ◽  
Drainage Pattern ◽  
Ecological Diversification ◽  
La Plata ◽  
La Plata Basin ◽  
History Of ◽  
Shed Light ◽  
Strong Barrier ◽  
Multilocus Phylogeny

AbstractDistribution history of the widespread Neotropical genus Hypostomus to shed light on the processes that shaped species diversity. We inferred a calibrated phylogeny; ancestral habitat preference, ancestral areas distribution, and the history of dispersal and vicariance events of this genus. The phylogenetic and distributional analyses indicate that Hypostomus species inhabiting La Plata Basin do not form a monophyletic clade, suggesting that several unrelated ancestral species colonized this basin in the Miocene (∼17 Mya). Dispersal to other rivers of La Plata Basin started about 8 Mya, followed by habitat shifts and an increased rate of cladogenesis. Amazonian Hypostomus species colonized La Plata Basin several times in the Middle Miocene, probably via the Upper Paraná and the Paraguay rivers that acted as biogeographic corridors. During the Miocene, La Plata Basin experienced marine incursions; and geomorphological and climatic changes that reconfigured its drainage pattern, driving the dispersal and diversification of Hypostomus. The Miocene marine incursion was a strong barrier and its retraction triggered Hypostomus dispersal, increased speciation rate and ecological diversification. The timing of hydrogeological changes in La Plata Basin coincides well with Hypostomus cladogenetic events, indicating that the history of this basin has acted on the diversification of its biota.

Strontium isotopes ( 87 Sr / 86 Sr ) reveal the life history of freshwater migratory fishes in the La Plata Basin

2020 ◽  
Vol 36 (10) ◽  
pp. 1985-2000
Author(s):  
Esteban Avigliano ◽  
Marc Pouilly ◽  
Julien Bouchez ◽  
Alejandro Domanico ◽  
Sebastian Sánchez ◽  
...  
Keyword(s):  
Life History ◽  
Strontium Isotopes ◽  
La Plata ◽  
La Plata Basin ◽  
History Of ◽  
Migratory Fishes

Phylogeography and Pleistocene demographic history of the endangered marsh deer (Blastocerus dichotomus) from the Río de la Plata Basin

2006 ◽  
Vol 7 (4) ◽  
pp. 563-575 ◽  
Author(s):  
Alejandro Márquez ◽  
J. E. Maldonado ◽  
S. González ◽  
M. D. Beccaceci ◽  
J. E. Garcia ◽  
...  
Keyword(s):  
Demographic History ◽  
Rio De La Plata ◽  
Río De La Plata ◽  
La Plata ◽  
La Plata Basin ◽  
History Of ◽  
Blastocerus Dichotomus

Negotiations Over Water and Other Natural Resources in the La Plata River Basin: A Model for Other Transboundary Basins?

2009 ◽  
Vol 14 (2) ◽  
pp. 253-279 ◽  
Author(s):  
Margaret Pinard ◽  
Natalie Kempkey ◽  
Ariel Dinar ◽  
Víctor Pochat
Keyword(s):  
Natural Resources ◽  
River Basin ◽  
Management Practices ◽  
Trade Agreements ◽  
La Plata ◽  
Governmental Organizations ◽  
La Plata Basin ◽  
Non Governmental Organizations ◽  
Foreign Countries ◽  
History Of

AbstractThe La Plata River Basin in South America, whose waters are shared by Argentina, Bolivia, Brazil, Paraguay and Uruguay, provides important lessons from the long history of negotiations over its shared water and other natural resources. In particular, innovative resource management practices developed over time have led to the relative harmony in which the riparian countries coexist. In this article, we analyze negotiation techniques within the La Plata River Basin by examining in detail the processes leading to the two seminal agreements – the 1969 Treaty of La Plata Basin and the 1979 Itaipú-Corpus Agreement. Based upon our analysis of the complex and often contradictory relationships between the riparian states, we evaluate the outcomes of both treaties from the standpoint of cooperation in the region and sustainable development. In doing so, we extend the relevance of the analysis to other basins with similar issues of regional management. The article extends the basin cooperation, through negotiation, to include trade agreements and development via project partnerships that draw in regional and global actors, including non-governmental organizations, environmental lobbies in foreign countries, and multinational development banks. The above actors are relevant for many parts of the world in today's era of globalization.

Investigating the Dynamics of Suicidal Ideation

Crisis ◽  
2018 ◽  
Vol 39 (1) ◽  
pp. 65-69 ◽  
Author(s):  
Nina Hallensleben ◽  
Lena Spangenberg ◽  
Thomas Forkmann ◽  
Dajana Rath ◽  
Ulrich Hegerl ◽  
...  
Keyword(s):  
Suicidal Ideation ◽  
Small Sample Size ◽  
Unipolar Depression ◽  
Small Sample ◽  
History Of ◽  
Severity Of Depression ◽  
Ecological Momentary ◽  
Depressive Episodes ◽  
Ema Method ◽  
Shed Light

Abstract. Background: Although the fluctuating nature of suicidal ideation (SI) has been described previously, longitudinal studies investigating the dynamics of SI are scarce. Aim: To demonstrate the fluctuation of SI across 6 days and up to 60 measurement points using smartphone-based ecological momentary assessments (EMA). Method: Twenty inpatients with unipolar depression and current and/or lifetime suicidal ideation rated their momentary SI 10 times per day over a 6-day period. Mean squared successive difference (MSSD) was calculated as a measure of variability. Correlations of MSSD with severity of depression, number of previous depressive episodes, and history of suicidal behavior were examined. Results: Individual trajectories of SI are shown to illustrate fluctuation. MSSD values ranged from 0.2 to 21.7. No significant correlations of MSSD with several clinical parameters were found, but there are hints of associations between fluctuation of SI and severity of depression and suicidality. Limitations: Main limitation of this study is the small sample size leading to low power and probably missing potential effects. Further research with larger samples is necessary to shed light on the dynamics of SI. Conclusion: The results illustrate the dynamic nature and the diversity of trajectories of SI across 6 days in psychiatric inpatients with unipolar depression. Prediction of the fluctuation of SI might be of high clinical relevance. Further research using EMA and sophisticated analyses with larger samples is necessary to shed light on the dynamics of SI.

Contribution of cold fronts to seasonal rainfall in simulations over the southern La Plata Basin

2016 ◽  
Vol 68 (2-3) ◽  
pp. 243-255 ◽  
Author(s):  
EM de Jesus ◽  
RP da Rocha ◽  
MS Reboita ◽  
M Llopart ◽  
LM Mosso Dutra ◽  
...  
Keyword(s):  
Seasonal Rainfall ◽  
La Plata ◽  
Cold Fronts ◽  
La Plata Basin

Editorial Introduction

2020 ◽  
Vol 4 (1) ◽  
pp. 1
Author(s):  
Editors of the JIOWS
Keyword(s):  
Nineteenth Century ◽  
Indian Ocean ◽  
Western Indian Ocean ◽  
Late Nineteenth Century ◽  
Fourth Volume ◽  
History Of ◽  
The Indian Ocean ◽  
Complex Relationships ◽  
Indian Ocean World ◽  
Shed Light

The editors are proud to present the first issue of the fourth volume of the Journal of Indian Ocean World Studies. This issue contains three articles, by James Francis Warren (Murdoch University), Kelsey McFaul (University of California, Santa Cruz), and Marek Pawelczak (University of Warsaw), respectively. Warren’s and McFaul’s articles take different approaches to the growing body of work that discusses pirates in the Indian Ocean World, past and present. Warren’s article is historical, exploring the life and times of Julano Taupan in the nineteenth-century Philippines. He invites us to question the meaning of the word ‘pirate’ and the several ways in which Taupan’s life has been interpreted by different European colonists and by anti-colonial movements from the mid-nineteenth century to the present day. McFaul’s article, meanwhile, takes a literary approach to discuss the much more recent phenomenon of Somali Piracy, which reached its apex in the last decade. Its contribution is to analyse the works of authors based in the region, challenging paradigms that have mostly been developed from analysis of works written in the West. Finally, Pawelczak’s article is a legal history of British jurisdiction in mid-late nineteenth-century Zanzibar. It examines one of the facets that underpinned European influence in the western Indian Ocean World before the establishment of colonial rule. In sum, this issue uses two key threads to shed light on the complex relationships between European and other Western powers and the Indian Ocean World.

De splitsing van de Belgische Socialistische Partij. Twee verklarende documenten

2008 ◽  
Vol 67 (2) ◽  
pp. 99-114
Author(s):  
Pieter-Jan Van Bosstraeten
Keyword(s):  
Socialist Party ◽  
French Speaking ◽  
History Of ◽  
Post War ◽  
Shed Light ◽  
Do So

Op 11 oktober 1978 splitste de Belgische Socialistische Partij zich als laatste van de drie unitaire partijen op in twee autonome partijen. Langs Franstalige zijde werd éénzijdig de Parti Socialiste opgericht, twee jaar later volgde de Socialistische Partij. De splitsing vormde het eindpunt van een lange en bewogen geschiedenis van de socialistische eenheidspartij.Ondanks het feit dat heel wat auteurs reeds een licht hebben geworpen op de belangrijkste gebeurtenis uit de na-oorlogse geschiedenis van de BSP, is het antwoord op de vraag naar de oorzaken van de splitsing vrij eenduidig. Overwegend wordt aangenomen dat de splitsing van de BSP het gevolg is van een moeilijke samenwerking in het kader van het communautaire dossier. Andere oorzaken worden amper aangehaald, of onvoldoende verduidelijkt. Tevens wordt slechts het politiek-tactische aspect van het communautaire dossier uitvoerig besproken. In de bestaande literatuur wordt zo goed als nergens dieper ingegaan op de inhoudelijke elementen die binnen de partij problemen teweegbrachten.Onderzoek van twee cruciale documenten heeft de mogelijkheid geboden het verhaal van de splitsing beter te reconstrueren. Daarbij is gebleken dat de splitsing van de partij in een ruimer kader dient te worden geïnterpreteerd dan het communautaire dossier. Aan de splitsing van de partij ging een lang proces van autonomisering en vleugelvorming vooraf. Bovendien werd aangetoond dat de problematiek inzake het Egmont-Stuyvenbergpact niet de enige directe oorzaak vormde voor de splitsing van de partij, in de periode 1977-1978. Enkele andere oorzaken hebben daartoe eveneens bijgedragen.________The division of the Belgian Socialist Party. Two explanatory documentsOn 11 October 1978 the Belgian Socialist Party divided into two autonomous parties, the last of the three unitary parties to do so. First the French speaking section unilaterally founded the ‘Parti Socialiste’, two years later the ‘Socialistische Partij’ followed. The division constituted the termination of the long and eventful history of the socialist unitary party.In spite of the fact that many authors have already shed light on the most important event from the post-war history of the BSP, the answer to the question about the causes for the division are fairly unequivocal. The majority of opinions favour the view that the division of the BSP was the consequence of the difficulty of collaborating within the framework of the community dossier. Other causes are hardly cited, or insufficiently elucidated. Moreover only the politico-tactical aspect of the community dossier is discussed in detail. The existing literature hardly ever carries out a more thorough examination of the intrinsic elements that caused problems within the party.The investigation of the two crucial documents has offered the opportunity to provide a better reconstruction of the division. This showed that the division of the party should be interpreted within a larger framework than the community dossier alone. A long process of autonomisation and the formation of political wings preceded the division of the party. It also demonstrated that the issues concerning the Egmont-Stuyvenberg pact were not the only direct cause for the division of the party, during the period 1977-1978. There were several other causes that also contributed to this division.

Imagining the Woman Reader in the Age of Dante

2018 ◽  
Author(s):  
Elena Lombardi
Keyword(s):  
Material Culture ◽  
Mother Tongue ◽  
The Other ◽  
Women Readers ◽  
Literary Authority ◽  
Woman Reader ◽  
History Of ◽  
Female Literacy ◽  
Female Audience ◽  
Shed Light

The literature of the Italian Due- and Trecento frequently calls into play the figure of a woman reader. From Guittone d’Arezzo’s piercing critic, the ‘villainous woman’, to the mysterious Lady who bids Guido Cavalcanti to write his grand philosophical song, to Dante’s female co-editors in the Vita Nova and his great characters of female readers, such as Francesca and Beatrice in the Comedy, all the way to Boccaccio’s overtly female audience, this particular sort of interlocutor appears to be central to the construct of textuality and the construction of literary authority in these times. The aim of this book is to shed light on this figure by contextualizing her within the history of female literacy, the material culture of the book, and the ways in which writers and poets of earlier traditions (in particular Occitan and French) imagined her. Its argument is that these figures of women readers are not mere veneers between a male author and a ‘real’ male readership, but that, although fictional, they bring several advantages to their vernacular authors, such as orality, the mother tongue, the recollection of the delights of early education, literality, freedom in interpretation, absence of teleology, the beauties of ornamentation and amplification, a reduced preoccupation with the fixity of the text, the pleasure of making mistakes, dialogue with the other, the extension of desire, original simplicity, and new and more flexible forms of authority.

scholarly journals The merger-driven evolution of massive early-type galaxies

2020 ◽  
Vol 15 (S359) ◽  
pp. 62-66
Author(s):  
Carlo Cannarozzo ◽  
Carlo Nipoti ◽  
Alessandro Sonnenfeld ◽  
Alexie Leauthaud ◽  
Song Huang ◽  
...  
Keyword(s):  
Mass Velocity ◽  
Selection Criteria ◽  
Velocity Dispersion ◽  
Ex Situ ◽  
Scaling Relations ◽  
Early Type ◽  
History Of ◽  
Kinematic Properties ◽  
Shed Light

AbstractThe evolution of the structural and kinematic properties of early-type galaxies (ETGs), their scaling relations, as well as their stellar metallicity and age contain precious information on the assembly history of these systems. We present results on the evolution of the stellar mass-velocity dispersion relation of ETGs, focusing in particular on the effects of some selection criteria used to define ETGs. We also try to shed light on the role that in-situ and ex-situ stellar populations have in massive ETGs, providing a possible explanation of the observed metallicity distributions.

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