demic diffusion
Recently Published Documents


TOTAL DOCUMENTS

51
(FIVE YEARS 11)

H-INDEX

15
(FIVE YEARS 1)

2021 ◽  
Vol 2 (16) ◽  
pp. 586-600
Author(s):  
Antonio Arnaiz-Villena ◽  
Marcial Medina ◽  
Valentín Ruíz-del-Valle ◽  
José Palacio-Gruber ◽  
Adrian Lopez-Nares ◽  
...  

Canarians, North Africans and Iberians show a close genetic relatedness. Greeks have a Sub-Saharan gene input according to HLA and other autosomic markers. Also, there is a genetic kinship between both Atlantic Euro Africans and North African/Arabic people. This is concordant with a drying humid Sahara Desert, which may have occurred about 6,000 years BC, and the subsequent northwards emigration of Saharan people may have also happened in Pharaonic times. This genetic input into Atlantic and Mediterranean Europe/Africa is also supported with Lineal Megalithic Scripts in Canary Islands (as well as in Iberia) together with simple Iberian semi-syllabary rock inscriptions both at Canary Islands and Ti-m Missaou (Algeria, Central southern Sahara). Lineal African/European scripts are found in certain languages scripts like Berber/Tuareg, Iberian, Runes, Etruscan, Bulgarian (Sitovo and Gradeshnitza, 6,000 years BP), Italian Old Scripts (Lepontic, Venetic, Raetic), Minoan Lineal A and Vinca scripts (Romania, Serbia, Greece, Bulgaria, about 4,000 years BP). The possibility that Megalithic Lineal Scripts have given rise to these languages lineal writing is feasible because admixture of languages rock scripts and Megalithic Lineal Scripts have been found. Thus, resistance of Canarian aborigines (Guanches) to Carthage, Rome and Arabs left a bulk of Canarian-Saharan information which is used to study both Saharan and Canarian Prehistory, and also Atlantic and Mediterranean beginning of European and other civilizations: this preserved prehistoric inheritance may be named the “Saharo-Canarian Circle” of prehistoric knowledge. Also, linguistics-epigraphy, physical anthropology, archaeology, and domesticated cattle shows a close North Africa-Iberia Mesolithic/Neolithic relationship and demonstrates that the demic diffusion model does not exist in Iberia. Also, Tassili Sahara paintings of domesticated cattle appear 1,000 years before those agricultural practices started at Middle East. Finally, it is also inferred that circum-Mediterranean contacts during thousand years between ice and desert constructed Mediterranean cultures from Canary Islands to Ancient Great Persia and this is the origin of Classical Mediterranean cultures that was later exclusively attributed to Rome and Greece.


2021 ◽  
pp. 1-17
Author(s):  
Guido Barbujani

In 1978, Paolo Menozzi, Alberto Piazza, and Luca Cavalli-Sforza paved the ground for a new multidisciplinary approach to the study of human prehistory, interpreting genetic evidence in the light of archaeological information. By producing synthetic maps of allele frequencies and summarizing them by principal component analysis (PCA), they identified an association between patterns in genetic diversity across Europe and in the Neolithic archaeological record showing the earliest documented dates of farming societies. Based on this observation, they proposed a model of demic diffusion from the Near East. They argued that the observed patterns were the result of population growth due to increased food availability in early farming communities, westward dispersal of early farmers, and relative isolation between dispersing farmers and local hunter-gatherers. These results played a major role in our understanding of the Neolithic transition, but were also criticized on methodological grounds. For instance, it has become increasingly clear that the interpretation of PCA plots is less straightforward than originally thought, and correlations should be corroborated by explicit comparison of alternative demographic models. Despite these valid criticisms, genetic and genomic studies, including those involving ancient DNA, have largely confirmed the crucial role of the Neolithic transition as a process of demographic change in European prehistory, with some qualifications. Today, there is still much to be learned about the details of that complex history, but many researchers regard the European population structure as largely reflecting the genetic consequences of three major migrations: from Africa in Upper Paleolithic times, from the Near East at the beginning of the Neolithic, and from the eastern steppes in the Bronze Age. This deep structure has not been erased, despite many additional processes involving historical migrations, isolation (i.e., drift) and local gene flow, and has been recognized thanks to the pioneering work of Menozzi, Piazza and Cavalli-Sforza. Based on “Menozzi P, Piazza A, Cavalli-Sforza LL Synthetic maps of human gene frequencies in Europeans. Science 1978;201:786-792.”


2021 ◽  
Vol 18 (183) ◽  
Author(s):  
Jonas Gregorio de Souza ◽  
Francisco Silva Noelli ◽  
Marco Madella

The expansion of forest farmers across tropical lowland South America during the Late Holocene has long been connected to climate change. The more humid conditions established during the Late Holocene are assumed to have driven the expansion of forests, which would have facilitated the dispersal of cultures that practised agroforestry. The Tupi, a language family of widespread distribution in South America, occupies a central place in the debate. Not only are they one of the largest families in the continent, but their expansion from an Amazonian homeland has long been hypothesized to have followed forested environments wherever they settled. Here, we assess that hypothesis using a simulation approach. We employ equation-based and cellular automaton models, simulating demic-diffusion processes under two different scenarios: a null model in which all land cells can be equally settled, and an alternative model in which non-forested cells cannot be settled or delay the expansion. We show that including land cover as a constraint to movement results in a better approximation of the Tupi expansion as reconstructed by archaeology and linguistics.


Author(s):  
Peter Robertshaw

The first East African pastoralists arrived at the shores of Lake Turkana soon after the end of the African Humid Period, about 5,000 years ago. In the preceding millennia of the Holocene, fishing economies characterized East Africa. The domestic animals of the early pastoralists were not indigenous to East Africa, nor did they spread through the region simultaneously. Early pastoralist archaeological sites around Lake Turkana comprise settlements and remarkable monumental cemeteries. The expansion of pastoralists further south through East Africa was a two-stage process, probably because of the challenges posed by the presence of diseases fatal to livestock. First, caprines spread south and appear to have been integrated into existing forager subsistence systems. Then, starting toward the end of the 2nd millennium bce, specialized pastoralism began to be established across central and southern Kenya and into northern Tanzania. While analysis of lipid residues on potsherds has demonstrated that these Pastoral Neolithic (PN) peoples milked their animals, the question of whether agriculture was also practiced remains unresolved. Analyses of ancient DNA have shown there were at least two episodes of demic diffusion associated with the spread and establishment of the PN in East Africa. Considerable diversity is present in the PN, with three distinct cultures generally recognized across East Africa south of Lake Turkana. Moreover, there is even greater diversity observed in the decoration and shapes of ceramics. However, this cultural diversity is not matched by human genetic diversity, at least among the analyzed skeletons from two of the three cultures—the Elmenteitan and the Savanna Pastoral Neolithic.


2021 ◽  
Vol 15 (2) ◽  
pp. 484-507
Author(s):  
Antonio Arnaiz-Villena ◽  
Ignacio Juarez ◽  
José Palacio-Grüber ◽  
Adrián Lopez-Nares ◽  
Fabio Suarez-Trujillo

Greeks have a Sub-Saharan gene input according to HLA and other autosomic markers. Iberians, Canarians, and North Africans show a close genetic relatedness. This is concordant with a drying humid Sahara Desert, which may have occurred about 6,000 years BC, and the subsequent northwards emigration of Saharan people may have also happened in Pharaonic times. Present study confirms this African gene input in Greeks according to 12th HLA International Workshop data, which was studied some years before by us. This genetic input into Atlantic and Mediterranean Europe/Africa is also supported with Lineal Megalithic Scripts in Canary Islands (as well as in Iberia) together with simple Iberian semi-syllabary rock inscriptions both at Canary Islands and Ti-m Missaou (Algeria, Central southern Sahara). Lineal African/European scripts are found in some language scripts like Berber/Tuareg, Iberian, Runes, Etruscan, Bulgarian (Sitovo and Gradeshnitza, 6,000 years BP), Italian Old Scripts (Lepontic, Venetic, Raetic), Minoan Lineal A, and other Aegean scripts. The possibility that Megalithic Lineal Scripts have given rise to these languages lineal writing is feasible because admixture of languages rock scripts and Megalithic Lineal Scripts may be found. Thus, resistance of Canarian aborigines (Guanches) to Cartago, Rome and Arabs left a bulk of Canarian-Saharan information which is used to study both Saharan and Canarian Prehistory, and also Atlantic and Mediterranean beginning of European and other civilizations: this preserved prehistoric inheritance may be named the “Saharo-Canarian Circle” of prehistoric knowledge. Also, linguisticsepigraphy, physical anthropology ,archaeology and domesticated cattle shows a close North Africa-Iberia Mesolithic/Neolithic relationship and demonstrates that the demic diffusion model does not exist in Iberia. Also, Tassili Sahara paintings of domesticated cattle appear 1,000 years before that agricultural practices started at Middle East. Keywords: Greeks, Macedonians, Sahara, Africa, Iberia, HLA, Genetics, Spaniards, Portuguese, Berbers, Algerians, demic, diffusion, Canary Islands, Lanzarote, Malta, Cart-ruts, Quesera, Cheesboard, Iberian, language, Guanche, Usko-Mediterranean, Phoenicians


2021 ◽  
Vol 2 (15) ◽  
pp. 484-507
Author(s):  
Antonio Arnaiz-Villena ◽  
Ignacio Juarez ◽  
José Palacio-Grüber ◽  
Adrián Lopez-Nares ◽  
Fabio Suarez-Trujillo

Greeks have a Sub-Saharan gene input according to HLA and other autosomic markers. Iberians, Canarians, and North Africans show a close genetic relatedness. This is concordant with a drying humid Sahara Desert, which may have occurred about 6,000 years BC, and the subsequent northwards emigration of Saharan people may have also happened in Pharaonic times. Present study confirms this African gene input in Greeks according to 12th HLA International Workshop data, which was studied some years before by us. This genetic input into Atlantic and Mediterranean Europe/Africa is also supported with Lineal Megalithic Scripts in Canary Islands (as well as in Iberia) together with simple Iberian semi-syllabary rock inscriptions both at Canary Islands and Ti-m Missaou (Algeria, Central southern Sahara). Lineal African/European scripts are found in some language scripts like Berber/Tuareg, Iberian, Runes, Etruscan, Bulgarian (Sitovo and Gradeshnitza, 6,000 years BP), Italian Old Scripts (Lepontic, Venetic, Raetic), Minoan Lineal A, and other Aegean scripts. The possibility that Megalithic Lineal Scripts have given rise to these languages lineal writing is feasible because admixture of languages rock scripts and Megalithic Lineal Scripts may be found. Thus, resistance of Canarian aborigines (Guanches) to Cartago, Rome and Arabs left a bulk of Canarian-Saharan information which is used to study both Saharan and Canarian Prehistory, and also Atlantic and Mediterranean beginning of European and other civilizations: this preserved prehistoric inheritance may be named the “Saharo-Canarian Circle” of prehistoric knowledge. Also, linguisticsepigraphy, physical anthropology ,archaeology and domesticated cattle shows a close North Africa-Iberia Mesolithic/Neolithic relationship and demonstrates that the demic diffusion model does not exist in Iberia. Also, Tassili Sahara paintings of domesticated cattle appear 1,000 years before that agricultural practices started at Middle East. Keywords: Greeks, Macedonians, Sahara, Africa, Iberia, HLA, Genetics, Spaniards, Portuguese, Berbers, Algerians, demic, diffusion, Canary Islands, Lanzarote, Malta, Cart-ruts, Quesera, Cheesboard, Iberian, language, Guanche, Usko-Mediterranean, Phoenicians


2021 ◽  
Vol 7 (1) ◽  
pp. 1660-1673
Author(s):  
Mariana Diniz

Abstract Western Iberia Early Neolithic has been described as an ultimate and very altered form of the Mediterranean Neolithisation process. Despite its Atlantic position, this territory – corresponding mainly to Central/Southern Portugal – is, in its physical and cultural geography, a Mediterranean landscape deeply connected to a historical process arriving from beyond the Strait of Gibraltar. The presence of cardial pottery led archaeologists to ascribe Portuguese Early Neolithic to a Mediterranean impressed Pottery cultural area, and according to demic diffusion models, small pioneer groups carrying the Neolithic package originated there. Recently, the archaeological record for the Western Mediterranean Neolithisation is becoming more complex and longer lasting cardial dominance over the seas has been disputed. Previous Neolithic groups seafaring the Mediterranean coasts with Impressa style pottery could have reached Iberian Peninsula by 5600–5400 cal BC, proving that by the mid-sixth millennium, different cultural entities were moving in the Western Mediterranean regardless of their genetic features. The main goal of this study is to disclose this cultural diversity in Western Iberia using a robust chronological database and debating how different proxies, like pottery styles and ancient DNA (aDNA), reveal it in Western Iberia. While recognising the Mediterranean input to Western Iberia groups, mapping the variability and the significance of different decoration techniques, such as cardial, false acacia leaf, impressed stripes, and using the aDNA to identify continuities/changes in ancient populations are here as tools to understand when, who, and how new kids came to the block. To do so, different disciplinary boundaries are crossed, and some transdisciplinary critical aspects are also commented.


Author(s):  
Xing-Yan Yang ◽  
Allah Rakha ◽  
Wei Chen ◽  
Juzhi Hou ◽  
Xue-Bin Qi ◽  
...  

Abstract The rise and expansion of Tibetan Empire in the 7th to 9th centuries AD affected the course of history across East Eurasia, but the genetic impact of Tibetans on surrounding populations remains undefined. We sequenced 60 genomes for four populations from Pakistan and Tajikistan to explore their demographic history. We showed that the genomes of Balti people from Baltistan comprised 22.6–26% Tibetan ancestry. We inferred a single admixture event and dated it to about 39–21 generations ago, a period that postdated the conquest of Baltistan by the ancient Tibetan Empire. The analyses of mitochondrial DNA, Y, and X chromosome data indicated that both ancient Tibetan males and females were involved in the male-biased dispersal. Given the fact that the Balti people adopted Tibetan language and culture in history, our study suggested the impact of Tibetan Empire on Baltistan involved dominant cultural and minor demic diffusion.


PLoS ONE ◽  
2020 ◽  
Vol 15 (4) ◽  
pp. e0232367
Author(s):  
Jonas Gregorio de Souza ◽  
Jonas Alcaina Mateos ◽  
Marco Madella

Sign in / Sign up

Export Citation Format

Share Document