1
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Schmidt P, Pappas I, Porraz G, Berthold C, Nickel KG. The driving force behind tool-stone selection in the African Middle Stone Age. Proc Natl Acad Sci U S A 2024; 121:e2318560121. [PMID: 38408239 DOI: 10.1073/pnas.2318560121] [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: 10/24/2023] [Accepted: 01/10/2024] [Indexed: 02/28/2024] Open
Abstract
In the Stone Age, the collection of specific rocks was the first step in tool making. Very little is known about the choices made during tool-stone acquisition. Were choices governed by the knowledge of, and need for, specific properties of stones? Or were the collected raw materials a mere by-product of the way people moved through the landscape? We investigate these questions in the Middle Stone Age (MSA) of southern Africa, analyzing the mechanical properties of tool-stones used at the site Diepkloof Rock Shelter. To understand knapping quality, we measure flaking predictability and introduce a physical model that allows calculating the relative force necessary to produce flakes from different rocks. To evaluate their quality as finished tools, we investigate their resistance during repeated use activities (scraping or cutting) and their strength during projectile impacts. Our findings explain tool-stone selection in two emblematic periods of the MSA, the Still Bay and Howiesons Poort, as being the result of a deep understanding of these mechanical properties. In both cases, people chose those rocks, among many others, that allowed the most advantageous trade-off between anticipated properties of finished tools and the ease of acquiring rocks and producing tools. The implications are an understanding of African MSA toolmakers as engineers who carefully weighed their choices taking into account workability and the quality of the tools they made.
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Affiliation(s)
- Patrick Schmidt
- Early Prehistory and Quaternary Ecology, Department of Geosciences, Eberhard Karls University of Tübingen, Tübingen 72070, Germany
- Applied Mineralogy, Department of Geosciences, Eberhard Karls University of Tübingen, Tübingen 72074, Germany
| | - Ioannis Pappas
- Early Prehistory and Quaternary Ecology, Department of Geosciences, Eberhard Karls University of Tübingen, Tübingen 72070, Germany
| | - Guillaume Porraz
- Aix Marseille Université, CNRS, Ministère de la Culture, UMR 7269 Lampea, Aix-en-Provence F-13094, France
- Faculty of Humanities, Evolutionary Studies Institute, University of the Witwatersrand, Johannesburg 2017, South Africa
| | - Christoph Berthold
- Applied Mineralogy, Department of Geosciences, Eberhard Karls University of Tübingen, Tübingen 72074, Germany
- Department of Geosciences, Competence Center Archaeometry-Baden Wuerttemberg, Eberhard Karls University of Tübingen, Tübingen 72074, Germany
| | - Klaus G Nickel
- Applied Mineralogy, Department of Geosciences, Eberhard Karls University of Tübingen, Tübingen 72074, Germany
- Department of Geosciences, Competence Center Archaeometry-Baden Wuerttemberg, Eberhard Karls University of Tübingen, Tübingen 72074, Germany
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2
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Marom N, Lazagabaster IA, Shafir R, Natalio F, Eisenmann V, Horwitz LK. The Late Middle Pleistocene mammalian fauna of Oumm Qatafa Cave, Judean Desert: taxonomy, taphonomy and palaeoenvironment. JOURNAL OF QUATERNARY SCIENCE 2022; 37:612-638. [PMID: 35915614 PMCID: PMC9314136 DOI: 10.1002/jqs.3414] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/06/2021] [Revised: 01/13/2022] [Accepted: 01/26/2022] [Indexed: 06/15/2023]
Abstract
The Middle Pleistocene archaeological record of the southern Levant has proven key to understanding human evolution and intercontinental faunal biogeography. Knowledge of archaeological sites of that period in the southern Levant is biased, with most Middle Pleistocene localities in the Mediterranean areas in the north, despite the mosaic of environments that mark the entire region. A key Middle Pleistocene location in the Judean Desert - on the eastern margin of the Mediterranean zone - is the site of Oumm Qatafa, excavated in the early 1900s, which yielded a faunal collection spanning an estimated time period of 600-200 kya. Here, we present a revised taxonomy of the macromammalian fauna from the site, discuss the palaeoenvironmental implications of this assemblage, and relate the finds to other Pleistocene sites from the Levant. These data enable a more precise palaeoenvironmental reconstruction which attests to an open landscape, but with the addition of a mesic Mediterranean component close by. In addition, detailed taphonomic observations on butchery marks and Fourier transform infrared spectroscopy analysis of burnt bone link the fauna for the first time to anthropogenic activities in the cave.
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Affiliation(s)
- Nimrod Marom
- School of Archaeology and Maritime Cultures & the Recanati Institute for Maritime StudiesUniversity of Haifa, HaifaIsrael
| | - Ignacio A. Lazagabaster
- School of Archaeology and Maritime Cultures & the Recanati Institute for Maritime StudiesUniversity of Haifa, HaifaIsrael
- Museum für Naturkunde, Leibniz Institute for Research on Evolution and Biodiversity at the Humboldt University BerlinBerlinGermany
| | - Roee Shafir
- School of Archaeology and Maritime Cultures & the Recanati Institute for Maritime StudiesUniversity of Haifa, HaifaIsrael
| | | | - Vera Eisenmann
- Unité Mixte de Recherche 5143 du Centre National de la Recherche Scientifique, CP 38, Département Histoire de la TerreParisFrance
| | - Liora Kolska Horwitz
- National Natural History CollectionsThe Hebrew University of JerusalemJerusalemIsrael
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3
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Faith JT, Du A, Behrensmeyer AK, Davies B, Patterson DB, Rowan J, Wood B. Rethinking the ecological drivers of hominin evolution. Trends Ecol Evol 2021; 36:797-807. [PMID: 34059368 DOI: 10.1016/j.tree.2021.04.011] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2021] [Revised: 04/21/2021] [Accepted: 04/26/2021] [Indexed: 11/19/2022]
Abstract
A central goal of paleoanthropology is understanding the role of ecological change in hominin evolution. Over the past several decades researchers have expanded the hominin fossil record and assembled detailed late Cenozoic paleoclimatic, paleoenvironmental, and paleoecological archives. However, effective use of these data is precluded by the limitations of pattern-matching strategies for inferring causal relationships between ecological and evolutionary change. We examine several obstacles that have hindered progress, and highlight recent research that is addressing them by (i) confronting an incomplete fossil record, (ii) contending with datasets spanning varied spatiotemporal scales, and (iii) using theoretical frameworks to build stronger inferences. Expanding on this work promises to transform challenges into opportunities and set the stage for a new phase of paleoanthropological research.
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Affiliation(s)
- J Tyler Faith
- Natural History Museum of Utah, University of Utah, Salt Lake City, UT 84108, USA; Department of Anthropology, University of Utah, Salt Lake City, UT 84112, USA.
| | - Andrew Du
- Department of Anthropology and Geography, Colorado State University, Fort Collins, CO 80523, USA
| | - Anna K Behrensmeyer
- Department of Paleobiology, National Museum of Natural History, Washington, DC 20013, USA
| | - Benjamin Davies
- Department of Anthropology, University of Utah, Salt Lake City, UT 84112, USA
| | - David B Patterson
- Department of Biology, University of North Georgia, Dahlonega, GA 30597, USA
| | - John Rowan
- Department of Anthropology, University at Albany, Albany, NY 12222, USA
| | - Bernard Wood
- Center for the Advanced Study of Human Paleobiology, The George Washington University, Washington, DC 20052, USA
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4
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Gravel-Miguel C, Murray JK, Schoville BJ, Wren CD, Marean CW. Exploring variability in lithic armature discard in the archaeological record. J Hum Evol 2021; 155:102981. [PMID: 33848696 DOI: 10.1016/j.jhevol.2021.102981] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2020] [Revised: 02/23/2021] [Accepted: 02/23/2021] [Indexed: 11/28/2022]
Abstract
The invention of projectile technology had important ramifications for hominin evolution. However, the number of stone points that could have been used as projectiles fluctuates in archaeological assemblages, making it difficult to define when projectile technology was first widely adopted and how its usage changed over time. Here we use an agent-based model to simulate a hunter-gatherer foraging system where armatures are dropped according to their usage. We explore the impact of interactions between human behaviors and the environmental constraints of a data-informed landscape on the distribution and number of lithic armatures found in archaeological assemblages. We ran 2400 simulations modeling different population sizes, rates of hunting with projectiles, and tool curation levels. For each simulation, we recorded the location of dropped armatures and calculated the number and percentage of used armatures that were discarded at habitation camps vs. lost during hunting. We used linear regression to identify the demographic, behavioral, and environmental factor(s) that best explained changes in these numbers and percentages. The model results show that in a well-controlled environment, most armatures used as projectile weapons are lost or discarded at hunting sites; only ∼4.5% of used armatures (or ∼2 armatures per year of simulation) are discarded in habitation camps where they would likely be excavated. These findings suggest that even rare hafted armatures found in the Early and Middle Stone Age could indicate a well-established use of such tools. Our model shows that interactions between reoccupation of archaeological sites, population size, rate of hunting with projectile weapons, and tool curation levels strongly influence the count of lithic armatures found in archaeological assemblages. Therefore, we argue that fluctuations in the counts of armatures documented at archaeological sites should be evaluated within their demographic and environmental contexts to better understand if they reflect spatiotemporal changes in hunting behavior.
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Affiliation(s)
- Claudine Gravel-Miguel
- Institute of Human Origins, School of Human Evolution and Social Change, Arizona State University, Tempe, AZ, USA; Département d'anthropologie, Université de Montréal, Montréal, QC, Canada.
| | - John K Murray
- Institute of Human Origins, School of Human Evolution and Social Change, Arizona State University, Tempe, AZ, USA
| | - Benjamin J Schoville
- School of Social Science, Faculty of Humanities and Social Sciences, The University of Queensland, St Lucia, Australia
| | - Colin D Wren
- Department of Anthropology, University of Colorado, Colorado Springs, CO, USA
| | - Curtis W Marean
- Institute of Human Origins, School of Human Evolution and Social Change, Arizona State University, Tempe, AZ, USA; African Centre for Coastal Palaeoscience, Nelson Mandela University, Eastern Cape, South Africa
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5
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Braun DR, Faith JT, Douglass MJ, Davies B, Power MJ, Aldeias V, Conard NJ, Cutts R, DeSantis LRG, Dupont LM, Esteban I, Kandel AW, Levin NE, Luyt J, Parkington J, Pickering R, Quick L, Sealy J, Stynder D. Ecosystem engineering in the Quaternary of the West Coast of South Africa. Evol Anthropol 2021; 30:50-62. [PMID: 33604991 DOI: 10.1002/evan.21886] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2019] [Revised: 06/30/2020] [Accepted: 12/22/2020] [Indexed: 11/09/2022]
Abstract
Despite advances in our understanding of the geographic and temporal scope of the Paleolithic record, we know remarkably little about the evolutionary and ecological consequences of changes in human behavior. Recent inquiries suggest that human evolution reflects a long history of interconnections between the behavior of humans and their surrounding ecosystems (e.g., niche construction). Developing expectations to identify such phenomena is remarkably difficult because it requires understanding the multi-generational impacts of changes in behavior. These long-term dynamics require insights into the emergent phenomena that alter selective pressures over longer time periods which are not possible to observe, and are also not intuitive based on observations derived from ethnographic time scales. Generative models show promise for probing these potentially unexpected consequences of human-environment interaction. Changes in the uses of landscapes may have long term implications for the environments that hominins occupied. We explore other potential proxies of behavior and examine how modeling may provide expectations for a variety of phenomena.
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Affiliation(s)
- David R Braun
- The George Washington University, Center for the Advanced Study of Human Paleobiology, Washington, District of Columbia, USA.,Department of Human Evolution, Max Planck Institute for Evolutionary Anthropology, Leipzig, Germany
| | - John Tyler Faith
- Natural History Museum of Utah, University of Utah, Salt Lake City, Utah, USA.,Department of Anthropology, University of Utah, Salt Lake City, Utah, USA
| | - Matthew J Douglass
- College of Agricultural Sciences and Natural Resources, University of Nebraska-Lincoln, Lincoln, Nebraska, USA.,Agricultural Research Division, University of Nebraska-Lincoln, Lincoln, Nebraska, USA
| | - Benjamin Davies
- Natural History Museum of Utah, University of Utah, Salt Lake City, Utah, USA
| | - Mitchel J Power
- Natural History Museum of Utah, University of Utah, Salt Lake City, Utah, USA.,Department of Geography, Natural History Museum of Utah, University of Utah, Salt Lake City, Utah, USA
| | - Vera Aldeias
- Interdisciplinary Center for Archaeology and Evolution of Human Behaviour (ICArEHB), Universidade do Algarve, Faro, Portugal
| | - Nicholas J Conard
- Department of Early Prehistory and Quaternary Ecology, University of Tübingen, Schloss Hohentübingen, Tübingen, Germany
| | - Russell Cutts
- Emory University-Oxford College, History and Social Sciences (Anthropology), Oxford, Georgia, USA
| | - Larisa R G DeSantis
- Department of Biological Sciences, Vanderbilt University, Nashville, Tennessee, USA
| | - Lydie M Dupont
- MARUM-Center for Marine Environmental Sciences, University of Bremen, Bremen, Germany
| | - Irene Esteban
- Evolutionary Studies Institute, University of Witwatersrand, Johannesburg, South Africa
| | - Andrew W Kandel
- The Role of Culture in Early Expansions of Humans, Heidelberg Academy of Sciences and Humanities, Tübingen, Germany
| | - Naomi E Levin
- Department of Earth and Environmental Sciences, University of Michigan, Ann Arbor, Michigan, USA
| | - Julie Luyt
- Department of Archaeology, University of Cape Town, Cape Town, South Africa
| | - John Parkington
- Department of Archaeology, University of Cape Town, Cape Town, South Africa
| | - Robyn Pickering
- Department of Geological Science, University of Cape Town, Cape Town, Western Cape, South Africa.,Human Evolution Research Institute, University of Cape Town, Cape Town, Western Cape, South Africa
| | - Lynne Quick
- African Centre for Coastal Palaeoscience, Nelson Mandela University, Port Elizabeth, South Africa
| | - Judith Sealy
- Department of Archaeology, University of Cape Town, Cape Town, South Africa
| | - Deano Stynder
- Department of Archaeology, University of Cape Town, Cape Town, South Africa
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6
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Ready E, Price MH. Human behavioral ecology and niche construction. Evol Anthropol 2021; 30:71-83. [PMID: 33555109 DOI: 10.1002/evan.21885] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2019] [Revised: 11/18/2020] [Accepted: 01/07/2021] [Indexed: 01/26/2023]
Abstract
We examine the relationship between niche construction theory (NCT) and human behavioral ecology (HBE), two branches of evolutionary science that are important sources of theory in archeology. We distinguish between formal models of niche construction as an evolutionary process, and uses of niche construction to refer to a kind of human behavior. Formal models from NCT examine how environmental modification can change the selection pressures that organisms face. In contrast, formal models from HBE predict behavior assuming people behave adaptively in their local setting, and can be used to predict when and why people engage in niche construction. We emphasize that HBE as a field is much broader than foraging theory and can incorporate social and cultural influences on decision-making. We demonstrate how these approaches can be formally incorporated in a multi-inheritance framework for evolutionary research, and argue that archeologists can best contribute to evolutionary theory by building and testing models that flexibly incorporate HBE and NCT elements.
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Affiliation(s)
- Elspeth Ready
- Department of Human Behavior, Ecology and Culture, Max Planck Institute for Evolutionary Anthropology, Leipzig, Germany
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7
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Will M, Conard NJ. Regional patterns of diachronic technological change in the Howiesons Poort of southern Africa. PLoS One 2020; 15:e0239195. [PMID: 32941544 PMCID: PMC7498030 DOI: 10.1371/journal.pone.0239195] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2020] [Accepted: 09/01/2020] [Indexed: 11/18/2022] Open
Abstract
The Howiesons Poort (HP) of southern Africa plays an important role in models on the early behavioral evolution of Homo sapiens. The HP is often portrayed as a coherent MSA industry characterized by early complex material culture. Recent work has emphasized parallel technological change through time across southern Africa potentially driven by ecological adaptations or demographic change. Here we examine patterns of diachronic variation within the HP and evaluate potential causal factors behind these changes. We test previous temporal assessments of the technocomplex at the local and regional level based on high-resolution quantitative data on HP lithic assemblages from Sibudu (KwaZulu-Natal) and comparisons with other southern African sites. At Sibudu, consistent unidirectional change in lithic technology characterizes the HP sequence. The results show a gradual reduction in typical HP markers such as the proportion of blades, backed pieces, and HP cores, as well as declining size of blades and backed artifacts. Quantitative comparisons with seven HP sites in South Africa suggest that lithic technology varies between regions over time instead of following similar changes. Concerning hypotheses of causal drivers, directional changes in lithic technology at Sibudu covary with shifting hunting patterns towards larger-sized bovids and a gradual opening of the vegetation. In contrast, variation in lithic technology shows little association with site use, mobility patterns or demographic expansions. Unlike at Sibudu, diachronic changes at other HP sites such as Diepkloof, Klasies River and Klipdrift appear to be associated with aspects of mobility, technological organization and site use. The regional diachronic patterns in the HP partly follow paleoclimatic zones, which could imply different ecological adaptations and distinct connection networks over time. Divergent and at times decoupled changes in lithic traits across sites precludes monocausal explanations for the entire HP, supporting more complex models for the observed technological trajectories.
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Affiliation(s)
- Manuel Will
- Department of Early Prehistory and Quaternary Ecology, University of Tübingen, Tübingen, Germany
- * E-mail:
| | - Nicholas J. Conard
- Department of Early Prehistory and Quaternary Ecology, University of Tübingen, Tübingen, Germany
- Senckenberg Center for Human Evolution and Paleoecology, University of Tübingen, Tübingen, Germany
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8
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Abstract
Present-day African ecosystems serve as referential models for conceptualizing the environmental context of early hominin evolution, but the degree to which modern ecosystems are representative of those in the past is unclear. A growing body of evidence from eastern Africa's rich and well-dated late Cenozoic fossil record documents communities of large-bodied mammalian herbivores with ecological structures differing dramatically from those of the present day, implying that modern communities may not be suitable analogs for the ancient ecosystems of hominin evolution. To determine when and why the ecological structure of eastern Africa's herbivore faunas came to resemble those of the present, here we analyze functional trait changes in a comprehensive dataset of 305 modern and fossil herbivore communities spanning the last ∼7 Myr. We show that nearly all communities prior to ∼700 ka were functionally non-analog, largely due to a greater richness of non-ruminants and megaherbivores (species >1,000 kg). The emergence of functionally modern communities precedes that of taxonomically modern communities by 100,000s of years, and can be attributed to the combined influence of Plio-Pleistocene C4 grassland expansion and pulses of aridity after ∼1 Ma. Given the disproportionate ecological impacts of large-bodied herbivores on factors such as vegetation structure, hydrology, and fire regimes, it follows that the vast majority of early hominin evolution transpired in the context of ecosystems that functioned unlike any today. Identifying how past ecosystems differed compositionally and functionally from those today is key to conceptualizing ancient African environments and testing ecological hypotheses of hominin evolution.
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9
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Pfeiffer S, Cameron ME, Sealy J, Beresheim AC. Diet and adult age-at-death among mobile foragers: A synthesis of bioarcheological methods. AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY 2019; 170:131-147. [PMID: 31265761 DOI: 10.1002/ajpa.23883] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2018] [Revised: 06/04/2019] [Accepted: 06/07/2019] [Indexed: 11/09/2022]
Abstract
OBJECTIVES The research explores whether the combined study of cortical bone histology, bone morphology, and dietary stable isotopes can expand insights into past human health and adaptations, particularly dietary sufficiency and life span. MATERIALS AND METHODS Midthoracic rib cortices from 54 South African Late Holocene adult skeletons (28 M, 24 F, two sex undetermined) are assessed by transmitted-light microscopy for cross-sectional area measurements, osteon area (On.Ar), osteon population density, and presence/absence of secondary osteon variants. Values for δ13 Cbone collagen , δ15 Nbone collagen , 14 C dates, Southwestern and Southern Cape geographic regions, body size measures, estimated ages-at-death from both morphological and histological methods are integrated into analyses, which include Spearman correlations, χ2 tests and Kruskal-Wallis ANOVAs. RESULTS There is reduced On.Ar variability with higher δ15 N (r = -.41, p = .005); rib %cortical area and δ15 N are negatively correlated in the Southern Cape group (r = -.60, p = .03). Osteon variants are more common in older adults; histological ages at death are significantly older than those determined from gross morphology. DISCUSSION We found bone tissue relationships with measures of diet composition, but indicators of dietary adequacy remain elusive. Relationships of tissue quality and isotopes suggest that some Southern Cape adults lived long lives. Osteon variants are associated with age-at-death; some association with diet remains possible. Gross morphological methods appear to underestimate adult ages-at-death, at least among small-bodied adults.
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Affiliation(s)
- Susan Pfeiffer
- Anthropology, University of Toronto, Toronto, Ontario, Canada.,Department of Archaeology, University of Cape Town, Cape Town, South Africa
| | | | - Judith Sealy
- Department of Archaeology, University of Cape Town, Cape Town, South Africa
| | - Amy C Beresheim
- Anthropology, University of Toronto, Toronto, Ontario, Canada.,Department of Anatomy, Des Moines University, Des Moines, Iowa
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10
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Joordens JC, Feibel CS, Vonhof HB, Schulp AS, Kroon D. Relevance of the eastern African coastal forest for early hominin biogeography. J Hum Evol 2019; 131:176-202. [DOI: 10.1016/j.jhevol.2019.03.012] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2018] [Revised: 03/10/2019] [Accepted: 03/13/2019] [Indexed: 12/25/2022]
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11
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Investigating Niche Construction in Dynamic Human-Animal Landscapes: Bridging Ecological and Evolutionary Timescales. INT J PRIMATOL 2018. [DOI: 10.1007/s10764-018-0033-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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12
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Modelling the role of groundwater hydro-refugia in East African hominin evolution and dispersal. Nat Commun 2017; 8:15696. [PMID: 28556825 PMCID: PMC5460002 DOI: 10.1038/ncomms15696] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2016] [Accepted: 04/20/2017] [Indexed: 11/26/2022] Open
Abstract
Water is a fundamental resource, yet its spatiotemporal availability in East Africa is poorly understood. This is the area where most hominin first occurrences are located, and consequently the potential role of water in hominin evolution and dispersal remains unresolved. Here, we show that hundreds of springs currently distributed across East Africa could function as persistent groundwater hydro-refugia through orbital-scale climate cycles. Groundwater buffers climate variability according to spatially variable groundwater response times determined by geology and topography. Using an agent-based model, grounded on the present day landscape, we show that groundwater availability would have been critical to supporting isolated networks of hydro-refugia during dry periods when potable surface water was scarce. This may have facilitated unexpected variations in isolation and dispersal of hominin populations in the past. Our results therefore provide a new environmental framework in which to understand how patterns of taxonomic diversity in hominins may have developed. Water is a fundamental resource, but its role in hominin evolution is not well explored. Here, the authors use a combination of groundwater, climate and agent-based models to show that groundwater availability may be critical to past patterns of taxonomic diversity in hominin development in East Africa.
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13
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Wilkins J, Brown KS, Oestmo S, Pereira T, Ranhorn KL, Schoville BJ, Marean CW. Lithic technological responses to Late Pleistocene glacial cycling at Pinnacle Point Site 5-6, South Africa. PLoS One 2017; 12:e0174051. [PMID: 28355257 PMCID: PMC5371328 DOI: 10.1371/journal.pone.0174051] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2016] [Accepted: 03/02/2017] [Indexed: 11/17/2022] Open
Abstract
There are multiple hypotheses for human responses to glacial cycling in the Late Pleistocene, including changes in population size, interconnectedness, and mobility. Lithic technological analysis informs us of human responses to environmental change because lithic assemblage characteristics are a reflection of raw material transport, reduction, and discard behaviors that depend on hunter-gatherer social and economic decisions. Pinnacle Point Site 5-6 (PP5-6), Western Cape, South Africa is an ideal locality for examining the influence of glacial cycling on early modern human behaviors because it preserves a long sequence spanning marine isotope stages (MIS) 5, 4, and 3 and is associated with robust records of paleoenvironmental change. The analysis presented here addresses the question, what, if any, lithic assemblage traits at PP5-6 represent changing behavioral responses to the MIS 5-4-3 interglacial-glacial cycle? It statistically evaluates changes in 93 traits with no a priori assumptions about which traits may significantly associate with MIS. In contrast to other studies that claim that there is little relationship between broad-scale patterns of climate change and lithic technology, we identified the following characteristics that are associated with MIS 4: increased use of quartz, increased evidence for outcrop sources of quartzite and silcrete, increased evidence for earlier stages of reduction in silcrete, evidence for increased flaking efficiency in all raw material types, and changes in tool types and function for silcrete. Based on these results, we suggest that foragers responded to MIS 4 glacial environmental conditions at PP5-6 with increased population or group sizes, 'place provisioning', longer and/or more intense site occupations, and decreased residential mobility. Several other traits, including silcrete frequency, do not exhibit an association with MIS. Backed pieces, once they appear in the PP5-6 record during MIS 4, persist through MIS 3. Changing paleoenvironments explain some, but not all temporal technological variability at PP5-6.
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Affiliation(s)
- Jayne Wilkins
- Human Evolution Research Institute, Department of Archaeology, University of Cape Town, Rondebosch, Private Bag, South Africa.,Centre for Coastal Paleoscience, Nelson Mandela Metropolitan University, Port Elizabeth, Eastern Cape, South Africa
| | - Kyle S Brown
- Human Evolution Research Institute, Department of Archaeology, University of Cape Town, Rondebosch, Private Bag, South Africa
| | - Simen Oestmo
- Institute of Human Origins, School of Human Evolution and Social Change, Arizona State University, Tempe, AZ, United States of America
| | - Telmo Pereira
- Interdisciplinary Center for Archaeology and Evolution of Human Behavior, Faculdade das Ciências Humanas e Sociais, Universidade do Algarve, Campus Gambelas, Faro, Portugal
| | - Kathryn L Ranhorn
- Center for the Advanced Study of Human Paleobiology, George Washington University, Washington, DC, United States of America
| | - Benjamin J Schoville
- Human Evolution Research Institute, Department of Archaeology, University of Cape Town, Rondebosch, Private Bag, South Africa.,Institute of Human Origins, School of Human Evolution and Social Change, Arizona State University, Tempe, AZ, United States of America
| | - Curtis W Marean
- Centre for Coastal Paleoscience, Nelson Mandela Metropolitan University, Port Elizabeth, Eastern Cape, South Africa.,Institute of Human Origins, School of Human Evolution and Social Change, Arizona State University, Tempe, AZ, United States of America
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14
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Singels E, Potts AJ, Cowling RM, Marean CW, De Vynck J, Esler KJ. Foraging potential of underground storage organ plants in the southern Cape, South Africa. J Hum Evol 2016; 101:79-89. [DOI: 10.1016/j.jhevol.2016.09.008] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2014] [Revised: 08/06/2016] [Accepted: 09/11/2016] [Indexed: 12/21/2022]
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15
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Morozova I, Flegontov P, Mikheyev AS, Bruskin S, Asgharian H, Ponomarenko P, Klyuchnikov V, ArunKumar G, Prokhortchouk E, Gankin Y, Rogaev E, Nikolsky Y, Baranova A, Elhaik E, Tatarinova TV. Toward high-resolution population genomics using archaeological samples. DNA Res 2016; 23:295-310. [PMID: 27436340 PMCID: PMC4991838 DOI: 10.1093/dnares/dsw029] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2015] [Accepted: 05/22/2016] [Indexed: 12/30/2022] Open
Abstract
The term ‘ancient DNA’ (aDNA) is coming of age, with over 1,200 hits in the PubMed database, beginning in the early 1980s with the studies of ‘molecular paleontology’. Rooted in cloning and limited sequencing of DNA from ancient remains during the pre-PCR era, the field has made incredible progress since the introduction of PCR and next-generation sequencing. Over the last decade, aDNA analysis ushered in a new era in genomics and became the method of choice for reconstructing the history of organisms, their biogeography, and migration routes, with applications in evolutionary biology, population genetics, archaeogenetics, paleo-epidemiology, and many other areas. This change was brought by development of new strategies for coping with the challenges in studying aDNA due to damage and fragmentation, scarce samples, significant historical gaps, and limited applicability of population genetics methods. In this review, we describe the state-of-the-art achievements in aDNA studies, with particular focus on human evolution and demographic history. We present the current experimental and theoretical procedures for handling and analysing highly degraded aDNA. We also review the challenges in the rapidly growing field of ancient epigenomics. Advancement of aDNA tools and methods signifies a new era in population genetics and evolutionary medicine research.
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Affiliation(s)
- Irina Morozova
- Institute of Evolutionary Medicine, University of Zurich, Zurich, Switzerland
| | - Pavel Flegontov
- Department of Biology and Ecology, Faculty of Science, University of Ostrava, Ostrava, Czech Republic Bioinformatics Center, A.A. Kharkevich Institute for Information Transmission Problems, Russian Academy of Sciences, Moscow, Russian Federation
| | - Alexander S Mikheyev
- Ecology and Evolution Unit, Okinawa Institute of Science and Technology Graduate University, Okinawa, Japan
| | - Sergey Bruskin
- Vavilov Institute of General Genetics RAS, Moscow, Russia
| | - Hosseinali Asgharian
- Department of Computational and Molecular Biology, University of Southern California, Los Angeles, CA, USA
| | - Petr Ponomarenko
- Center for Personalized Medicine, Children's Hospital Los Angeles, Los Angeles, CA, USA Spatial Sciences Institute, University of Southern California, Los Angeles, CA, USA
| | | | | | - Egor Prokhortchouk
- Research Center of Biotechnology RAS, Moscow, Russia Department of Biology, Lomonosov Moscow State University, Russia
| | | | - Evgeny Rogaev
- Vavilov Institute of General Genetics RAS, Moscow, Russia University of Massachusetts Medical School, Worcester, MA, USA
| | - Yuri Nikolsky
- Vavilov Institute of General Genetics RAS, Moscow, Russia F1 Genomics, San Diego, CA, USA School of Systems Biology, George Mason University, VA, USA
| | - Ancha Baranova
- School of Systems Biology, George Mason University, VA, USA Research Centre for Medical Genetics, Moscow, Russia Atlas Biomed Group, Moscow, Russia
| | - Eran Elhaik
- Department of Animal & Plant Sciences, University of Sheffield, Sheffield, South Yorkshire, UK
| | - Tatiana V Tatarinova
- Bioinformatics Center, A.A. Kharkevich Institute for Information Transmission Problems, Russian Academy of Sciences, Moscow, Russian Federation Center for Personalized Medicine, Children's Hospital Los Angeles, Los Angeles, CA, USA Spatial Sciences Institute, University of Southern California, Los Angeles, CA, USA
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16
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Abstract
Wayfinding, or the ability to plan and navigate a course over the landscape, is a subject of investigation in geography, neurophysiology, psychology, urban planning, and landscape design. With the prevalence of GPS-assisted navigation systems, or "wayfinders," computer scientists are also increasingly interested in understanding how people plan their movements and guide others. However, the importance of wayfinding as a process that regulates human mobility has only recently been incorporated into archeological research design. Hominin groups were able to disperse widely during the course of prehistory. The scope of these dispersals speaks to the innate navigation abilities of hominins. Their long-term success must have depended on an ability to communicate spatial information effectively. Here, we consider the extent to which some landscapes may have been more conducive to wayfinding than others. We also describe a tool we have created for quantifying landscape legibility (sensu Gollege), a complex and under-explored concept in archeology, with a view to investigating the impact of landscape structure on human wayfinding and thus, patterns of dispersal during prehistory. To this end, we have developed a method for quantifying legibility using a Geographic Information System (GIS) and apply it to a test case in prehistoric Iberia.
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De Vynck JC, Cowling RM, Potts AJ, Marean CW. Seasonal availability of edible underground and aboveground carbohydrate resources to human foragers on the Cape south coast, South Africa. PeerJ 2016; 4:e1679. [PMID: 26925319 PMCID: PMC4768670 DOI: 10.7717/peerj.1679] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2015] [Accepted: 01/20/2016] [Indexed: 11/21/2022] Open
Abstract
The coastal environments of South Africa’s Cape Floristic Region (CFR) provide some of the earliest and most abundant evidence for the emergence of cognitively modern humans. In particular, the south coast of the CFR provided a uniquely diverse resource base for hunter-gatherers, which included marine shellfish, game, and carbohydrate-bearing plants, especially those with Underground Storage Organs (USOs). It has been hypothesized that these resources underpinned the continuity of human occupation in the region since the Middle Pleistocene. Very little research has been conducted on the foraging potential of carbohydrate resources in the CFR. This study focuses on the seasonal availability of plants with edible carbohydrates at six-weekly intervals over a two-year period in four vegetation types on South Africa’s Cape south coast. Different plant species were considered available to foragers if the edible carbohydrate was directly (i.e. above-ground edible portions) or indirectly (above-ground indications to below-ground edible portions) visible to an expert botanist familiar with this landscape. A total of 52 edible plant species were recorded across all vegetation types. Of these, 33 species were geophytes with edible USOs and 21 species had aboveground edible carbohydrates. Limestone Fynbos had the richest flora, followed by Strandveld, Renosterveld and lastly, Sand Fynbos. The availability of plant species differed across vegetation types and between survey years. The number of available USO species was highest for a six-month period from winter to early summer (Jul–Dec) across all vegetation types. Months of lowest species’ availability were in mid-summer to early autumn (Jan–Apr); the early winter (May–Jun) values were variable, being highest in Limestone Fynbos. However, even during the late summer carbohydrate “crunch,” 25 carbohydrate bearing species were visible across the four vegetation types. To establish a robust resource landscape will require additional spatial mapping of plant species abundances. Nonetheless, our results demonstrate that plant-based carbohydrate resources available to Stone Age foragers of the Cape south coast, especially USOs belonging to the Iridaceae family, are likely to have comprised a reliable and nutritious source of calories over most of the year.
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Affiliation(s)
- Jan C De Vynck
- Centre for Coastal Palaeosciences, Nelson Mandela Metropolitan University , Port Elizabeth, Eastern Cape , South Africa
| | - Richard M Cowling
- Centre for Coastal Palaeosciences, Nelson Mandela Metropolitan University , Port Elizabeth, Eastern Cape , South Africa
| | - Alastair J Potts
- Centre for Coastal Palaeosciences, Nelson Mandela Metropolitan University , Port Elizabeth, Eastern Cape , South Africa
| | - Curtis W Marean
- Centre for Coastal Palaeosciences, Nelson Mandela Metropolitan University, Port Elizabeth, Eastern Cape, South Africa; Institute of Human Origins, School of Human Evolution and Social Change, Arizona State University, Tempe, Arizona, United States
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