scholarly journals Ancient DNA Suggests Single Colonization and Within-Archipelago Diversification of Caribbean Caviomorph Rodents

2020 ◽  
Vol 38 (1) ◽  
pp. 84-95
Author(s):  
Roseina Woods ◽  
Ian Barnes ◽  
Selina Brace ◽  
Samuel T Turvey
Keyword(s):  
Ancient Dna ◽  
Morphological Evolution ◽  
Nuclear Data ◽  
Data Sets ◽  
Evolutionary Pattern ◽  
Evolutionary Radiation ◽  
History Of ◽  
The Caribbean ◽  
Caviomorph Rodents ◽  
Mass Increase

Abstract Reconstructing the evolutionary history of island biotas is complicated by unusual morphological evolution in insular environments. However, past human-caused extinctions limit the use of molecular analyses to determine origins and affinities of enigmatic island taxa. The Caribbean formerly contained a morphologically diverse assemblage of caviomorph rodents (33 species in 19 genera), ranging from ∼0.1 to 200 kg and traditionally classified into three higher-order taxa (Capromyidae/Capromyinae, Heteropsomyinae, and Heptaxodontidae). Few species survive today, and the evolutionary affinities of living and extinct Caribbean caviomorphs to each other and to mainland taxa are unclear: Are they monophyletic, polyphyletic, or paraphyletic? We use ancient DNA techniques to present the first genetic data for extinct heteropsomyines and heptaxodontids, as well as for several extinct capromyids, and demonstrate through analysis of mitogenomic and nuclear data sets that all sampled Caribbean caviomorphs represent a well-supported monophyletic group. The remarkable morphological and ecological variation observed across living and extinct caviomorphs from Cuba, Hispaniola, Jamaica, Puerto Rico, and other islands was generated through within-archipelago evolutionary radiation following a single Early Miocene overwater colonization. This evolutionary pattern contrasts with the origination of diversity in many other Caribbean groups. All living and extinct Caribbean caviomorphs comprise a single biologically remarkable subfamily (Capromyinae) within the morphologically conservative living Neotropical family Echimyidae. Caribbean caviomorphs represent an important new example of insular mammalian adaptive radiation, where taxa retaining “ancestral-type” characteristics coexisted alongside taxa occupying novel island niches. Diversification was associated with the greatest insular body mass increase recorded in rodents and possibly the greatest for any mammal lineage.

White Zombie as Captivity Narrative and the Death of Certainty

2020 ◽  
Vol 2 ◽  
pp. 19-25
Author(s):  
Mark C Anderson
Keyword(s):  
American Indians ◽  
American Slavery ◽  
Captivity Narrative ◽  
Early American ◽  
Arts And Culture ◽  
History Of ◽  
American Black ◽  
The Caribbean ◽  
American Society ◽  
Black Other

Horror films such as White Zombie (1932) reveal viewers to themselves by narrating in the currency of audience anxiety. Such movies evoke fright because they recapitulate fear and trauma that audiences have already internalized or continue to experience, even if they are not aware of it. White Zombie’s particular tack conjures up an updated captivity narrative wherein a virginal white damsel is abducted by a savage Other. The shell of the captivity story, of course, is as old as America. In its earliest incarnation it featured American Indians in the role as savage Other, fiendishly imagined as having been desperate to get their clutches on white females and all that hey symbolized. In this way, it generated much of the emotional heat stoking Manifest Destiny, that is, American imperial conquest both of the continent and then, later, as in the case of Haiti, of the Caribbean Basin. White Zombie must of course be understood in the context of the American invasion and occupation of Haiti (1915-1934). As it revisits the terrain inhabited by the American black Other, it also speaks to the history of American slavery. The Other here is African-American, not surprisingly given the date and nature of American society of the day, typically imagined in wildly pejorative fashion in early American arts and culture. This essay explores White Zombie as a modified captivity narrative, pace Last of the Mohicans through John Ford’s The Searchers (1956), the Rambo trilogy (1982, 1985, 1988), the Taken trilogy (2008, 1012, 2014), even Mario and Luigi’s efforts to rescue Princess Peach from Bowser.

scholarly journals Pleistocene aridification underlies the evolutionary history of the Caribbean endemic, insular, giant Consolea (Opuntioideae)

2021 ◽  
Vol 108 (2) ◽  
pp. 200-215 ◽  
Author(s):  
Lucas C. Majure ◽  
Duniel Barrios ◽  
Edgardo Díaz ◽  
Bethany A. Zumwalde ◽  
Weston Testo ◽  
...  
Keyword(s):  
Evolutionary History ◽  
History Of ◽  
The Caribbean

HURRICANES, CROPS, AND CAPITAL: THE METEOROLOGICAL INFRASTRUCTURE OF AMERICAN EMPIRE IN THE WEST INDIES

2016 ◽  
Vol 15 (4) ◽  
pp. 418-445 ◽  
Author(s):  
Jamie L. Pietruska
Keyword(s):  
West Indian ◽  
The United States ◽  
American Empire ◽  
The West ◽  
Knowledge Infrastructure ◽  
Military Security ◽  
Symbolic Extension ◽  
History Of ◽  
The Caribbean ◽  
Weather Service

This article examines the mutually reinforcing imperatives of government science, capitalism, and American empire through a history of the U.S. Weather Bureau's West Indian weather service at the turn of the twentieth century. The original impetus for expanding American meteorological infrastructure into the Caribbean in 1898 was to protect naval vessels from hurricanes, but what began as a measure of military security became, within a year, an instrument of economic expansion that extracted climatological data and produced agricultural reports for American investors. This article argues that the West Indian weather service was a project of imperial meteorology that sought to impose a rational scientific and bureaucratic order on a region that American officials considered racially and culturally inferior, yet relied on the labor of local observers and Cuban meteorological experts in order to do so. Weather reporting networks are examined as a material and symbolic extension of American technoscientific power into the Caribbean and as a knowledge infrastructure that linked the production of agricultural commodities in Cuba and Puerto Rico to the world of commodity exchange in the United States.

From Columbus to Castro: The History of the Caribbean, 1492-1969

1972 ◽  
Vol 77 (4) ◽  
pp. 1185
Author(s):  
Robert E. McNicoll ◽  
Eric Williams
Keyword(s):  
History Of ◽  
The Caribbean

Early origin of sweet perception in the songbird radiation

Science ◽  
2021 ◽  
Vol 373 (6551) ◽  
pp. 226-231 ◽  
Author(s):  
Yasuka Toda ◽  
Meng-Ching Ko ◽  
Qiaoyi Liang ◽  
Eliot T. Miller ◽  
Alejandro Rico-Guevara ◽  
...  
Keyword(s):  
Evolutionary History ◽  
Genetic Basis ◽  
Sensory Biology ◽  
Avian Evolution ◽  
Nectar Feeding ◽  
Evolutionary Radiation ◽  
History Of ◽  
Sensory Convergence ◽  
Early Origin

Early events in the evolutionary history of a clade can shape the sensory systems of descendant lineages. Although the avian ancestor may not have had a sweet receptor, the widespread incidence of nectar-feeding birds suggests multiple acquisitions of sugar detection. In this study, we identify a single early sensory shift of the umami receptor (the T1R1-T1R3 heterodimer) that conferred sweet-sensing abilities in songbirds, a large evolutionary radiation containing nearly half of all living birds. We demonstrate sugar responses across species with diverse diets, uncover critical sites underlying carbohydrate detection, and identify the molecular basis of sensory convergence between songbirds and nectar-specialist hummingbirds. This early shift shaped the sensory biology of an entire radiation, emphasizing the role of contingency and providing an example of the genetic basis of convergence in avian evolution.

Northern Hemisphere Glaciation, African Climate and Evolution

2021 ◽  
Author(s):  
Martin H. Trauth ◽  
Asfawossen Asrat ◽  
Nadine Berner ◽  
Faysal Bibi ◽  
Verena Foerster ◽  
...  
Keyword(s):  
Northern Hemisphere ◽  
Species Turnover ◽  
Abrupt Onset ◽  
Data Sets ◽  
Scientific Idea ◽  
Gradual Process ◽  
Before And After ◽  
History Of ◽  
Change Point Models ◽  
Original Interpretation

<p>The hypothesis of a connection between the onset (or intensification) of Northern Hemisphere Glaciation (NHG), the stepwise increase in African aridity (and climate variability) and an important mammalian (including hominin) species turnover is a textbook example of the initiation of a scientific idea and its propagation in science. It is, however, also an example of the persistent popularity of a hypothesis despite mounting evidence against it. The first part of our work analyzes of the history of the scientific idea by seeking its roots, including coincidental meetings and exchanges between of scientists, at project meetings, conferences and workshops. The consequences of this idea are examined and its influence on subsequent scientific investigations both before and after it has been falsified. In the second part of our investigation, we examine why the idea that the high latitudes have a major control on the climate of the low latitudes and thus early human evolution persists. For this purpose, an attempt is made to understand the original interpretation of the data, with special consideration of the composition of the scientific team and their scientific backgrounds and persuasions. Some of the key records in support of the hypothesis of a step-wise transition will be statistically re-analyzed by fitting change-point models to the time series to determine the midpoint and duration of the transition – in case such a transition is found in the data. A critical review of key publications in support of such a connection and a statistical re-analysis of key data sets leads to three conclusions: (1) Northern Hemisphere Glaciation is a gradual process between ~3.5–2.5 Ma, not an abrupt onset, either at ~2.5 Ma, nor at ~2.8 Ma, or any other time in the Late Cenozoic Era, (2) the trend towards greater aridity in Africa during this period was also gradual, not stepwise in the sense of a consistent transition of a duration of ≤0.2 Ma, and (3) accordingly, a step-wise change in environmental conditions cannot be used to explain an important mammalian (including hominin) species turnover.</p>

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