Impact of character correlation and variable groupings on modern human population tree resolution

2003 ◽  
Vol 122 (2) ◽  
pp. 134-146 ◽  
Author(s):  
Sheela Athreya ◽  
Michelle M. Glantz
Keyword(s):  
Human Population ◽  
Modern Human ◽  
Character Correlation ◽  
Tree Resolution

scholarly journals An ecocultural model predicts Neanderthal extinction through competition with modern humans

2016 ◽  
Vol 113 (8) ◽  
pp. 2134-2139 ◽  
Author(s):  
William Gilpin ◽  
Marcus W. Feldman ◽  
Kenichi Aoki
Keyword(s):  
Cultural Change ◽  
Human Population ◽  
Competitive Exclusion ◽  
Modern Human ◽  
Learning Ability ◽  
Volterra Model ◽  
Modern Humans ◽  
Interacting Species ◽  
The Difference ◽  
Cultural Competition

Archaeologists argue that the replacement of Neanderthals by modern humans was driven by interspecific competition due to a difference in culture level. To assess the cogency of this argument, we construct and analyze an interspecific cultural competition model based on the Lotka−Volterra model, which is widely used in ecology, but which incorporates the culture level of a species as a variable interacting with population size. We investigate the conditions under which a difference in culture level between cognitively equivalent species, or alternatively a difference in underlying learning ability, may produce competitive exclusion of a comparatively (although not absolutely) large local Neanderthal population by an initially smaller modern human population. We find, in particular, that this competitive exclusion is more likely to occur when population growth occurs on a shorter timescale than cultural change, or when the competition coefficients of the Lotka−Volterra model depend on the difference in the culture levels of the interacting species.

scholarly journals Denisovan ancestry and population history of early East Asians

2020 ◽  
Author(s):  
Diyendo Massilani ◽  
Laurits Skov ◽  
Mateja Hajdinjak ◽  
Byambaa Gunchinsuren ◽  
Damdinsuren Tseveendorj ◽  
...  
Keyword(s):  
Gene Flow ◽  
Human Population ◽  
Modern Human ◽  
Population History ◽  
East Asians ◽  
Aboriginal Australians ◽  
North East ◽  
History Of ◽  
Female Member ◽  
Admixture Event

AbstractWe present analyses of the genome of a ~34,000-year-old hominin skull cap discovered in the Salkhit Valley in North East Mongolia. We show that this individual was a female member of a modern human population that, following the split between East and West Eurasians, experienced substantial gene flow from West Eurasians. Both she and a 40,000-year-old individual from Tianyuan outside Beijing carried genomic segments of Denisovan ancestry. These segments derive from the same Denisovan admixture event(s) that contributed to present-day mainland Asians but are distinct from the Denisovan DNA segments in present-day Papuans and Aboriginal Australians.

Skulls That Speak

2017 ◽  
Vol 3 (2) ◽  
Author(s):  
Antoine Balzeau
Keyword(s):  
Human Population ◽  
Modern Human ◽  
Population History ◽  
Human Language ◽  
Human Skull

Antoine Balzeau critically reviews a recent paper by Hugo Reyes-Centeno, Katerina Harvati, and Gerhard Jäger, “Tracking Modern Human Population History from Linguistic and Cranial Phenotype” that argues for a link between the development of human language and the evolving shape of the human skull.

scholarly journals Denisovan ancestry and population history of early East Asians

Science ◽  
2020 ◽  
Vol 370 (6516) ◽  
pp. 579-583
Author(s):  
Diyendo Massilani ◽  
Laurits Skov ◽  
Mateja Hajdinjak ◽  
Byambaa Gunchinsuren ◽  
Damdinsuren Tseveendorj ◽  
...  
Keyword(s):  
Gene Flow ◽  
Human Population ◽  
Modern Human ◽  
Population History ◽  
East Asians ◽  
Aboriginal Australians ◽  
History Of ◽  
East And West ◽  
Female Member ◽  
Admixture Event

We present analyses of the genome of a ~34,000-year-old hominin skull cap discovered in the Salkhit Valley in northeastern Mongolia. We show that this individual was a female member of a modern human population that, following the split between East and West Eurasians, experienced substantial gene flow from West Eurasians. Both she and a 40,000-year-old individual from Tianyuan outside Beijing carried genomic segments of Denisovan ancestry. These segments derive from the same Denisovan admixture event(s) that contributed to present-day mainland Asians but are distinct from the Denisovan DNA segments in present-day Papuans and Aboriginal Australians.

Frontal sinus ontogeny and covariation with bone structures in a modern human population

2018 ◽  
Vol 279 (7) ◽  
pp. 871-882
Author(s):  
Marina L. Sardi ◽  
G. Germán Joosten ◽  
Cynthia D. Pandiani ◽  
María Mercedes Gould ◽  
Marisol Anzelmo ◽  
...  
Keyword(s):  
Frontal Sinus ◽  
Human Population ◽  
Modern Human ◽  
Bone Structures

scholarly journals Learning the properties of adaptive regions with functional data analysis

2019 ◽  
Author(s):  
Mehreen R. Mughal ◽  
Hillary Koch ◽  
Jinguo Huang ◽  
Francesca Chiaromonte ◽  
Michael DeGiorgio
Keyword(s):  
Functional Data ◽  
Human Population ◽  
Genomic Data ◽  
Continuous Functions ◽  
Modern Human ◽  
Beneficial Mutation ◽  
Adaptive Introgression ◽  
Complex Modes ◽  
Data Points ◽  
Selection Parameters

AbstractIdentifying regions of positive selection in genomic data remains a challenge in population genetics. Most current approaches rely on comparing values of summary statistics calculated in windows. We present an approach termed SURFDAWave, which translates measures of genetic diversity calculated in genomic windows to functional data. By transforming our discrete data points to be outputs of continuous functions defined over genomic space, we are able to learn the features of these functions that signify selection. This enables us to confidently identify complex modes of natural selection, including adaptive introgression. We are also able to predict important selection parameters that are responsible for shaping the inferred selection events. By applying our model to human population-genomic data, we recapitulate previously identified regions of selective sweeps, such as OCA2 in Europeans, and predict that its beneficial mutation reached a frequency of 0.02 before it swept 1,802 generations ago, a time when humans were relatively new to Europe. In addition, we identify BNC2 in Europeans as a target of adaptive introgression, and predict that it harbors a beneficial mutation that arose in an archaic human population that split from modern humans within the hypothesized modern human-Neanderthal divergence range.

scholarly journals Environmental effects of the COVID-19 pandemic from a (marine) ecological perspective

2020 ◽  
Vol 20 ◽  
pp. 41-55
Author(s):  
M Coll
Keyword(s):  
Human Population ◽  
Sustainable Use ◽  
Modern Human ◽  
Lessons Learned ◽  
Ecological Perspective ◽  
The Novel ◽  
Economic Activities ◽  
Negative Effects ◽  
Natural Systems ◽  
Management Measures

The 2019-2020 pandemic of the SARS-CoV-2 virus—the cause of the novel COVID-19 disease—is an exceptional moment in modern human history. The abrupt and intense cessation of human activities in the first months of the pandemic, when large parts of the global human population were in lockdown, had noticeable effects on the environment that can serve to identify key learning experiences to foster a deep reflection on the human relationship with nature, and their interdependence. There are precious lessons to be learned. A global, tangible threat was needed to trigger a global lockdown, where different societies adopted different strategies and management measures to adapt or transform their activities. Humanity is still coming to terms with how to relaunch the economy while preventing further outbreaks. Here, I summarize the immediate positive and negative effects that the pandemic has had on the natural environment, with emphasis on marine ecosystems. I reflect on key lessons learned from this unprecedented situation so far. The essential role that the oceans play in maintaining the functioning of natural systems and key socio-economic activities is exceptionally relevant, and I discuss key not-to-miss opportunities to add the ‘Blue Recovery’ to the international agenda under the new ‘Build Back Better’ or ‘Healthy Recovery’ context after the acute phase of COVID-19. Achieving sustainable use of the ocean is one of the grand challenges of the new decade, and marine ecologists must play a more proactive role.

scholarly journals Tracking modern human population history from linguistic and cranial phenotype

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
Hugo Reyes-Centeno ◽  
Katerina Harvati ◽  
Gerhard Jäger
Keyword(s):  
Human Population ◽  
Modern Human ◽  
Population History
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