Some Aspects of Water Balance in Tenebrionid Beetles and a Thysanuran from the Namib Desert of Southern Africa

1971 ◽  
Vol 44 (2) ◽  
pp. 61-76 ◽  
Author(s):  
E. B. Edney
Keyword(s):  
Water Balance ◽  
Southern Africa ◽  
Namib Desert

Archaeological Evidence of Domestic Sheep in the Namib Desert During the First millennium AD

2016 ◽  
Vol 14 (1) ◽  
pp. 7-17 ◽  
Author(s):  
John Kinahan
Keyword(s):  
Southern Africa ◽  
Rock Art ◽  
Indirect Evidence ◽  
Domestic Sheep ◽  
Ritual Practice ◽  
Namib Desert ◽  
Broad Agreement ◽  
First Millennium ◽  
Changing Economy ◽  
Fundamental Shift

Bones of domestic sheep dated to the early first millennium AD are described from the Dâures massif in the Namib Desert. The remains confirm earlier investigations which inferred the acquisition of livestock from indirect evidence in the rock art, suggesting a fundamental shift in ritual practice at this time. Dating of the sheep remains is in broad agreement with the dating of other finds in the same area and in southern Africa as a whole. The presence of suspected sheep bone artefacts, possibly used for ritual purposes, draws attention to the importance of livestock as more than a component of diet in the changing economy of hunter-gatherer society.

scholarly journals The role of Southern Africa as a dust precursor to East Antarctica

2020 ◽  
Author(s):  
Stefania Gili ◽  
Aubry Vanderstraeten ◽  
Mathieu Cazaunau ◽  
Amelie Chaput ◽  
Jean-Francois Doussin ◽  
...  
Keyword(s):  
Southern Hemisphere ◽  
Southern Africa ◽  
Mineral Dust ◽  
Numerical Models ◽  
Dust Emission ◽  
East Antarctica ◽  
Namib Desert ◽  
Earth Planet ◽  
Dust Sources ◽  
Dronning Maud Land

<p>Identifying the provenance of mineral dust depositions in Antarctica is crucial to reconstruct Southern Hemisphere (SH) atmospheric circulation, validate numerical models, evaluate their contribution as micronutrients in the Southern Ocean and assess their control on the climate changes. For the last few decades, it has been demonstrated Southern South America (SSA) is the main precursor of dust reaching Antarctica during both ice ages and interglacial periods (e.g. Gili et al., 2017, 2016). However, the origin of modern dust depositions on the Antarctic continent is still poorly constrained. Back in the nineties, together with SSA, Australia, New Zealand, and Southern Africa were firstly identified as dust contributors to East Antarctica (EA) (e.g. Delmonte et al., 2004a). Since then, only SSA and Australian dust sources benefited from detailed studies. While some works identified the Makgadikgadi and Etosha Pans as southern Africa's major mineral dust sources in the SH, it was not until recently the Namib Desert coastal areas were described as another important regional dust sources. Within the Namib Desert and along the coast, the Kuiseb (K), Omaruru (O) and Huab (H) dry riverbeds are the three main areas identified as the dustiest ones with the higher frequency of dust emission events (Von Holdt et al., 2017). Here we use Sr, Nd and Pb isotopes (measured on HR-MC-ICP-MS) to characterize and evaluate the influence of this region in Southern Africa as a dust source to EA. Samples collected in K, O and H desertic areas were analyzed together with snow samples collected along a ~250 km N-S transect (defined from the coast to inland) at seven different sampling sites in the surroundings of Dronning Maud Land, EA. In addition, using the bulk of the Huab region, dust aerosols were generated into an atmospheric simulation chamber (CESAM) to reproduce, mechanically the saltation and sandblasting processes responsible for the release of mineral dust in natural conditions. Our isotopic results show Namibia’s coast emerged as another possible source end-member, together with some regions in SSA, that supply dust to EA during warmer periods.</p><p>References:</p><p>Delmonte, B., Basile-Doelsch, I., Petit, J.R., Maggi, V., Revel-Rolland, M., Michard, A., Jagoutz, E., Grousset, F., 2004. Comparing the EPICA and Vostok dust records during the last 220,000 years: stratigraphical correlation and provenance in glacial periods. Earth-Sci. Rev. 66, 63–87.</p><p>Gili, S., Gaiero, D.M., Goldstein, S.L., Chemale, F. Jr., Koester, E., Jweda, J., Vallelonga, P., Kaplan, M.R., 2016. Provenance of dust to Antarctica: a lead isotopic perspective. Geophys. Res. Lett. 43. http://dx.doi.org/10.1002/2016GL068244.</p><p>Gili, S., D.M. Gaiero, S.L. Goldstein, F. Chemale, J. Jweda, M.R. Kaplan, R.A. Becchio, and E. Koester (2017). Glacial/interglacial changes of Southern Hemisphere wind circulation from the geochemistry of South American dust. Earth Planet. Sci. Lett., 469, 98-109, doi: 10.1016/j.epsl.2017.04.007.</p><p>Von Holdt, JR., Eckardt FD., and Wiggs GFS., 2017. Landsat identifies aeolian dust emission dynamics at the landform scale. Remote Sensing of Environment 198., 229–243.</p>

scholarly journals The maternal genetic history of the Angolan Namib Desert: a key region for understanding the peopling of southern Africa

2017 ◽  
Author(s):  
Sandra Oliveira ◽  
Anne-Maria Fehn ◽  
Teresa Aço ◽  
Fernanda Lages ◽  
Magdalena Gayá-Vidal ◽  
...  
Keyword(s):  
Genetic Structure ◽  
Southern Africa ◽  
Social Stratification ◽  
Strong Impact ◽  
Namib Desert ◽  
Indigenous Group ◽  
History Of ◽  
Recent Arrival ◽  
Migratory Movements ◽  
Internal Variation

ABSTRACTSouthern Angola is a poorly studied region, inhabited by populations that have been associated with different migratory movements into southern Africa. Besides the long-standing presence of indigenous Kx’a-speaking foragers and the more recent arrival of Bantu-speaking pastoralists, ethnographic and linguistic studies have suggested that other pre-Bantu communities were also present in the Namib desert, including peripatetic groups like the Kwepe (formerly Kwadi speakers), Twa and Kwisi. Here we evaluate previous peopling hypotheses by analyzing the relationships between seven groups from the Namib desert (Kuvale, Himba, Tjimba, Kwisi, Twa, Kwepe) and Kunene Province (!Xun), based on newly collected linguistic data and 295 complete mtDNA genomes. We found that: i) all groups from the Namib desert have genealogically-consistent matriclanic systems that had a strong impact on their maternal genetic structure by enhancing genetic drift and population differentiation; ii) the dominant pastoral groups represented by the Kuvale and Himba were part of a Bantu proto-population that also included the ancestors of present-day Damara and Herero peoples from Namibia; iii) Tjimba are closely related to the Himba; iv) the Kwepe, Twa and Kwisi have a divergent Bantu-related mtDNA profile and probably stem from a single population that does not show clear signs of being a pre-Bantu indigenous group. Taken together, our results suggest that the maternal genetic structure of the different groups from the Namib desert is largely derived from endogamous Bantu peoples, and that their social stratification and different subsistence patterns are not indicative of remnant groups, but reflect Bantu-internal variation and ethnogenesis.

Dryland dunes and other dryland environmental archives as proxies for Late Quaternary stratigraphy and environmental and climate change in southern Africa

2021 ◽  
Author(s):  
A. Stone
Keyword(s):  
Southern Africa ◽  
Late Quaternary ◽  
Sand Dunes ◽  
Geographic Area ◽  
Global Scale ◽  
Namib Desert ◽  
The Past ◽  
The North ◽  
Quaternary Stratigraphy ◽  
Environmental Responses

Abstract The Namib Desert and the Kalahari constitute the drylands of southern Africa, with the current relatively humid portions of the latter having experienced periodically drier conditions during the Late Quaternary. This study explores the range of dryland archives and proxies available for the past ~190 ka. These include classic dryland geomorphological proxies, such as sand dunes, as well as water-lain sediments within former lakes and ephemeral fluvial systems, lake shorelines, sand ramps, water-lain calcrete and tufa sediments at the interface of surface hydrological and hydrogeological, speleothems and groundwater hydrogeological records, and hyrax middens. Palaeoenvironmental evidence can also be contained within geoarchaeological archives in caves, overhangs and rockshelters. This integration of records is undertaken with the aim of identifying a (or a number of) terrestrial regional chronostratigraphic framework(s) for this time period within southern Africa, because this is missing from the Quaternary stratigraphy lexicon. Owing to a lack of long, near-continuous terrestrial sequences in these drylands, the correspondence between nearby terrestrial records are explored as a basis for parasequences to build this chronostratigraphy. Recognising the modern climatological diversity across the subcontinent, four broad spatial subdivisions are used to explore potential sub-regional parasequences, which capture current climatic gradients, including the hyper-arid west coast and the decrease in aridity from the southwest Kalahari toward the north and east. These are the Namib Desert, the northern Kalahari, the southern Kalahari and the eastern fringes of the southern Kalahari. Terrestrial chronostratigraphies must start from premise that climate-driven environmental shifts may have occurred independently to those in other terrestrial locations and may be diachronous compared to the marine oxygen isotope stratigraphy (MIS), which serves as a global-scale master climatostratigraphy relating to global ice volume. The fragmented nature of preserved evidence means that we are still some way from producing unambiguous parasequences. There is however, a rich record to consider, compile and compare, within which seven broad wetter intervals are identified, with breaks between these inferred to be relatively drier, and some also have proxy evidence for drying. The onset and cessation of these wetter intervals does not align with MIS: they occur with greater frequency, but not with regular periodicity. Precession-paced insolation forcing is often invoked as a key control on southern African climate, but this does not explain the pacing of all of the identified events. Overall, the pattern is complex with some corresponding wetter intervals across space and others with opposing west-east trends. The evidence for drying over the past 10 ka is pronounced in the west (Namib Desert), with ephemerally wet conditions in the south (southern Kalahari). The patterns identified here provide a framework to be scrutinised and to inspire refinements to proposed terrestrial chronostratigraphies for southern Africa. Considering changes across this large geographic area also highlights the complexity in environmental responses across space as we continue to test a range of hypotheses about the nature of climatic forcing in this region.

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