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Sahle Y, Firew GA, Pearson OM, Stynder DD, Beyin A. MIS 3 innovative behavior and highland occupation during a stable wet episode in the Lake Tana paleoclimate record, Ethiopia. Sci Rep 2024; 14:17038. [PMID: 39048619 PMCID: PMC11269595 DOI: 10.1038/s41598-024-67743-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2024] [Accepted: 07/15/2024] [Indexed: 07/27/2024] Open
Abstract
Securely dated archaeological sites from key regions and periods are critical for understanding early modern human adaptive responses to past environmental change. Here, we report new radiocarbon dates of > 42,000 cal years BP for an intensive human occupation of Gorgora rockshelter in the Ethiopian Highlands. We also document the development of innovative technologies and symbolic behaviors starting around this time. The evidenced occupation and behavioral patterns coincide with the onset and persistence of a stable wet phase in the geographically proximate high-resolution core record of Lake Tana. Range expansion into montane habitats and the subsequent development of innovative technologies and behaviors are consistent with population dispersal waves within Africa and beyond during wetter phases ~ 60-40 thousand years ago (ka).
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Affiliation(s)
- Yonatan Sahle
- Department of Archaeology, University of Cape Town, Rondebosch, 7701, South Africa.
- Department of History & Heritage Management, Arba Minch University, PO Box 21, Arba Minch, Ethiopia.
| | - Gedef A Firew
- Department of History & Heritage Management, Bahir Dar University, PO Box 79, Bahir Dar, Ethiopia
| | - Osbjorn M Pearson
- Department of Anthropology, University of New Mexico, Albuquerque, NM87131, USA
| | - Deano D Stynder
- Department of Archaeology, University of Cape Town, Rondebosch, 7701, South Africa
| | - Amanuel Beyin
- Department of Anthropology, University of Louisville, Louisville, KY, 40292, USA
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Broggini C, Cavallini M, Vanetti I, Abell J, Binelli G, Lombardo G. From Caves to the Savannah, the Mitogenome History of Modern Lions ( Panthera leo) and Their Ancestors. Int J Mol Sci 2024; 25:5193. [PMID: 38791233 PMCID: PMC11121052 DOI: 10.3390/ijms25105193] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2024] [Revised: 05/06/2024] [Accepted: 05/08/2024] [Indexed: 05/26/2024] Open
Abstract
Lions (Panthera leo) play a crucial ecological role in shaping and maintaining fragile ecosystems within Africa. Conservation efforts should focus on genetic variability within wild populations when considering reintroduction attempts. We studied two groups of lions from two conservation sites located in Zambia and Zimbabwe to determine their genetic make-up, information that is usually unknown to the sites. In this study, we analysed 17 specimens for cytb and seven microsatellite markers to ascertain family relationships and genetic diversity previously obtained by observational studies. We then produced a standardised haplogroup phylogeny using all available entire mitogenomes, as well as calculating a revised molecular clock. The modern lion lineage diverged ~151 kya and was divided into two subspecies, both containing three distinct haplogroups. We confirm that Panthera leo persica is not a subspecies, but rather a haplogroup of the northern P.l. leo that exited Africa at least ~31 kya. The progenitor to all lions existed ~1.2 Mya, possibly in SE Africa, and later exited Africa and split into the two cave lion lineages ~175 kya. Species demography is correlated to major climactic events. We now have a detailed phylogeny of lion evolution and an idea of their conservation status given the threat of climate change.
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Affiliation(s)
- Camilla Broggini
- Wildlife Research Unit (UIRCP-UCO), University of Cordoba, 14071 Córdoba, Spain;
| | - Marta Cavallini
- Department of Biotechnology and Life Sciences (DBSV), University of Insubria, 21100 Varese, Italy; (M.C.); (I.V.); (G.B.)
| | - Isabella Vanetti
- Department of Biotechnology and Life Sciences (DBSV), University of Insubria, 21100 Varese, Italy; (M.C.); (I.V.); (G.B.)
| | - Jackie Abell
- Centre for Agroecology, Water and Resilience, Coventry University, Coventry CV8 3LG, UK;
| | - Giorgio Binelli
- Department of Biotechnology and Life Sciences (DBSV), University of Insubria, 21100 Varese, Italy; (M.C.); (I.V.); (G.B.)
| | - Gianluca Lombardo
- Department of Biotechnology and Life Sciences (DBSV), University of Insubria, 21100 Varese, Italy; (M.C.); (I.V.); (G.B.)
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Gannon C, Hill RA, Lameira AR. Open plains are not a level playing field for hominid consonant-like versus vowel-like calls. Sci Rep 2023; 13:21138. [PMID: 38129443 PMCID: PMC10739746 DOI: 10.1038/s41598-023-48165-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Accepted: 11/22/2023] [Indexed: 12/23/2023] Open
Abstract
Africa's paleo-climate change represents an "ecological black-box" along the evolutionary timeline of spoken language; a vocal hominid went in and, millions of years later, out came a verbal human. It is unknown whether or how a shift from forested, dense habitats towards drier, open ones affected hominid vocal communication, potentially setting stage for speech evolution. To recreate how arboreal proto-vowels and proto-consonants would have interacted with a new ecology at ground level, we assessed how a series of orangutan voiceless consonant-like and voiced vowel-like calls travelled across the savannah. Vowel-like calls performed poorly in comparison to their counterparts. Only consonant-like calls afforded effective perceptibility beyond 100 m distance without requiring repetition, as is characteristic of loud calling behaviour in nonhuman primates, typically composed by vowel-like calls. Results show that proto-consonants in human ancestors may have enhanced reliability of distance vocal communication across a canopy-to-ground ecotone. The ecological settings and soundscapes experienced by human ancestors may have had a more profound impact on the emergence and shape of spoken language than previously recognized.
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Affiliation(s)
| | - Russell A Hill
- Department of Anthropology, Durham University, Durham, UK
- Primate and Predator Project, Soutpansberg Mountains, Thohoyandou, South Africa
- Department of Biological Sciences, University of Venda, Thohoyandou, South Africa
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Niang K, Blinkhorn J, Bateman MD, Kiahtipes CA. Longstanding behavioural stability in West Africa extends to the Middle Pleistocene at Bargny, coastal Senegal. Nat Ecol Evol 2023; 7:1141-1151. [PMID: 37142742 PMCID: PMC10333124 DOI: 10.1038/s41559-023-02046-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2022] [Accepted: 03/24/2023] [Indexed: 05/06/2023]
Abstract
Middle Stone Age (MSA) technologies first appear in the archaeological records of northern, eastern and southern Africa during the Middle Pleistocene epoch. The absence of MSA sites from West Africa limits evaluation of shared behaviours across the continent during the late Middle Pleistocene and the diversity of subsequent regionalized trajectories. Here we present evidence for the late Middle Pleistocene MSA occupation of the West African littoral at Bargny, Senegal, dating to 150 thousand years ago. Palaeoecological evidence suggests that Bargny was a hydrological refugium during the MSA occupation, supporting estuarine conditions during Middle Pleistocene arid phases. The stone tool technology at Bargny presents characteristics widely shared across Africa in the late Middle Pleistocene but which remain uniquely stable in West Africa to the onset of the Holocene. We explore how the persistent habitability of West African environments, including mangroves, contributes to distinctly West African trajectories of behavioural stability.
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Affiliation(s)
- Khady Niang
- Département d'Histoire, Université Cheikh Anta Diop de Dakar, Dakar, Senegal.
- Pan-African Evolution Research Group, Max Planck Institute for the Science of Human History, Jena, Germany.
| | - James Blinkhorn
- Pan-African Evolution Research Group, Max Planck Institute for the Science of Human History, Jena, Germany.
- Centre for Quaternary Research, Department of Geography, Royal Holloway, University of London, Egham, UK.
| | - Mark D Bateman
- Department of Geography, University of Sheffield, Sheffield, UK
| | - Christopher A Kiahtipes
- Institute for the Advanced Study of Culture and the Environment, University of South Florida, Tampa, FL, USA
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Scerri EML, Will M. The revolution that still isn't: The origins of behavioral complexity in Homo sapiens. J Hum Evol 2023; 179:103358. [PMID: 37058868 DOI: 10.1016/j.jhevol.2023.103358] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2022] [Revised: 03/13/2023] [Accepted: 03/14/2023] [Indexed: 04/16/2023]
Abstract
The behavioral origins of Homo sapiens can be traced back to the first material culture produced by our species in Africa, the Middle Stone Age (MSA). Beyond this broad consensus, the origins, patterns, and causes of behavioral complexity in modern humans remain debated. Here, we consider whether recent findings continue to support popular scenarios of: (1) a modern human 'package,' (2) a gradual and 'pan-African' emergence of behavioral complexity, and (3) a direct connection to changes in the human brain. Our geographically structured review shows that decades of scientific research have continuously failed to find a discrete threshold for a complete 'modernity package' and that the concept is theoretically obsolete. Instead of a continent-wide, gradual accumulation of complex material culture, the record exhibits a predominantly asynchronous presence and duration of many innovations across different regions of Africa. The emerging pattern of behavioral complexity from the MSA conforms to an intricate mosaic characterized by spatially discrete, temporally variable, and historically contingent trajectories. This archaeological record bears no direct relation to a simplistic shift in the human brain but rather reflects similar cognitive capacities that are variably manifested. The interaction of multiple causal factors constitutes the most parsimonious explanation driving the variable expression of complex behaviors, with demographic processes such as population structure, size, and connectivity playing a key role. While much emphasis has been given to innovation and variability in the MSA record, long periods of stasis and a lack of cumulative developments argue further against a strictly gradualistic nature in the record. Instead, we are confronted with humanity's deep, variegated roots in Africa, and a dynamic metapopulation that took many millennia to reach the critical mass capable of producing the ratchet effect commonly used to define contemporary human culture. Finally, we note a weakening link between 'modern' human biology and behavior from around 300 ka ago.
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Affiliation(s)
- Eleanor M L Scerri
- Pan-African Evolution Research Group, Max Planck Institute for Geoanthropology, Kahlaische Str. 10, 07749, Jena, Germany; Department of Classics and Archaeology, University of Malta, Msida, MSD 2080, Malta; Department of Prehistory, University of Cologne, 50931, Cologne, Germany.
| | - Manuel Will
- Department of Early Prehistory and Quaternary Ecology, University of Tübingen, Schloss Hohentübingen, Burgsteige 11, 72070, Tübingen, Germany
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Timbrell L, Grove M, Manica A, Rucina S, Blinkhorn J. A spatiotemporally explicit paleoenvironmental framework for the Middle Stone Age of eastern Africa. Sci Rep 2022; 12:3689. [PMID: 35256702 PMCID: PMC8901736 DOI: 10.1038/s41598-022-07742-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2021] [Accepted: 02/24/2022] [Indexed: 11/09/2022] Open
Abstract
Eastern Africa has played a prominent role in debates about human evolution and dispersal due to the presence of rich archaeological, palaeoanthropological and palaeoenvironmental records. However, substantial disconnects occur between the spatial and temporal resolutions of these data that complicate their integration. Here, we apply high-resolution climatic simulations of two key parameters, mean annual temperature and precipitation, and a biome model, to produce a highly refined characterisation of the environments inhabited during the eastern African Middle Stone Age. Occupations are typically found in sub-humid climates and landscapes dominated by or including tropical xerophytic shrubland. Marked expansions from these core landscapes include movement into hotter, low-altitude landscapes in Marine Isotope Stage 5 and cooler, high-altitude landscapes in Marine Isotope Stage 3, with the recurrent inhabitation of ecotones between open and forested habitats. Through our use of high-resolution climate models, we demonstrate a significant independent relationship between past precipitation and patterns of Middle Stone Age stone tool production modes overlooked by previous studies. Engagement with these models not only enables spatiotemporally explicit examination of climatic variability across Middle Stone Age occupations in eastern Africa but enables clearer characterisation of the habitats early human populations were adapted to, and how they changed through time.
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