Lake Turkana and Its Link to the Nile

Johnson, Thomas C.; Malala, John

doi:10.1007/978-1-4020-9726-3_15

Cited by 56 publications

(30 citation statements)

References 25 publications

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“…In the late Pleistocene to early Holocene, southern Ethiopian Rift Valley lakes had overflows into Lake Turkana (Golubstov & Redeat, ), suggesting more recent faunal exchanges between the Omo‐Turkana and Chamo‐Abaya basins. In addition, it is hypothesized that the Turkana basin was connected to the Nile River in the early Holocene (Grove et al , ; Grove, ; Johnson & Malala, ). On the other hand, as shown in this study, Lake Baringo and Abay River (Nile River system) share a haplotype ( i.e .…”

Section: Discussionmentioning

confidence: 99%

Mitochondrial DNA phylogeography of the Labeobarbus intermedius complex (Pisces, Cyprinidae) from Ethiopia

Beshera

Harris

2014

Journal of Fish Biology

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Mitochondrial DNA phylogeography of populations of the Labeobarbus intermedius complex (hexaploid barb) was investigated using 88 complete and 71 partial cytochrome b (cytb) sequences originating from 21 localities in five major drainages in Ethiopia and two localities in northern Kenya. The samples included 14 of the 15 Labeobarbus species described from Lake Tana. Discrete phylogeographic analyses of 159 cytb sequences employing Bayesian Markov Chain Monte Carlo (MCMC) simulations using Bayesian evolutionary analysis by sampling trees (BEAST) supported the monophyly of the L. intermedius complex, including the Lake Tana species. This analysis, in combination with statistical parsimony analysis, identified two mitochondrial DNA lineages within the complex. Divergence dating employing coalescent simulations suggested that the geographic split in the L. intermedius complex that led to the formation of these lineages occurred during the Pleistocene (c. 0.5 M b.p.), consistent with the timing of volcano-tectonic events postulated to have shaped the current landscape of East Africa.

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Section: Discussionmentioning

confidence: 99%

Mitochondrial DNA phylogeography of the Labeobarbus intermedius complex (Pisces, Cyprinidae) from Ethiopia

Beshera

Harris

2014

Journal of Fish Biology

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“…Garcin et al, 2009;Tierney et al, 2011a;Berke et al, 2012b;Foerster et al, 2012;Tierney and deMenocal, 2013). The AHP resulted in increased vegetation cover (Castañeda et al, 2007;Damsté et al, 2011), surface water availability (Gasse et al, 2008;Verschuren et al, 2009;Blanchet et al, 2013), lake high stands (Ritchie et al, 1985;Street-Perrott et al, 1989;Kuper and Kröpelin, 2006), and hydrologic connection of presently endorheic lakes in eastern Africa (Nyamweru, 1989;Garcin et al, 2009;Johnson and Malala, 2009).…”

Section: Introductionmentioning

confidence: 94%

Water level history for Lake Turkana, Kenya in the past 15,000years and a variable transition from the African Humid Period to Holocene aridity

Bloszies

Forman

Wright

2015

Global and Planetary Change

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“…However, the age models used in both Butzer (1980) and Owen et al (1982) have been refined (Bloszies et al in press;Forman et al 2014;Garcin et al 2012). Overflows of Lake Turkana into the Nile River may have occurred between 11,500 and 7,800 years BP and 7,400 and 4,300 years BP (Johnson and Malala 2009; see also Morrissey and Scholz 2014 in which Total Organic Carbon (TOC) derived from lake core sediments indicates overflow conditions between 10,000 and 6,000 years BP).…”

Section: Paleoclimate Of the Turkana Catchmentmentioning

confidence: 99%

Lakeside View: Sociocultural Responses to Changing Water Levels of Lake Turkana, Kenya

et al. 2015

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Throughout the Holocene, Lake Turkana has been subject to drastic changes in lake levels and the subsistence strategies people employ to survive in this hot and arid region. In this paper, we reconstruct the position of the lake during the Holocene within a paleoclimatic context. Atmospheric forcing mechanisms are discussed in order to contextualize the broader landscape changes occurring in eastern Africa over the last 12,000 years. The Holocene is divided into five primary phases according to changes in the strand-plain evolution, paleoclimate, and human subsistence strategies practiced within the basin. Early Holocene fishing settlements occurred adjacent to high and relatively stable lake levels. A period of high-magnitude oscillations in lake levels Afr Archaeol Rev (2015) ensued after 9,000 years BP and human settlements appear to have been located close to the margins of the lake. Aridification and a final regression in lake levels ensued after 5,000 years BP and human communities were generalized pastoralists-fishers-foragers. During the Late Holocene, lake levels may have dropped below their present position and subsistence strategies appear to have been flexible and occasionally specialized on animal pastoralism. Modern missionary and government outposts have encouraged the construction of permanent settlements in the region, which are heavily dependent on outside resources for their survival. Changes in the physical and cultural environments of the Lake Turkana region have been closely correlated, and understanding the relationship between the two variables remains a vital component of archaeological research.Résumé Tout l'Holocène, le lac Turkana a été soumis à des changements drastiques dans l'altitude des lacs et les stratégies de subsistance des gens utilisent pour survivre dans cette région chaude et aride. Dans cet article, nous reconstruisons la position du lac au cours de l'Holocène dans un contexte paléoclimatique. Mécanismes de forçage atmosphériques sont discutées afin de contextualiser les changements de paysage plus larges qui se produisent en Afrique orientale au cours des 12.000 dernières années. L'Holocène est divisé en cinq phases principales en fonction des changements dans l'évolution altitude du lac, paléoclimats et les stratégies de subsistance humains pratiqués dans le bassin. Premiers établissements de pêche de l'Holocène ont eu lieu à proximité d'altitude d'eau élevés et relativement stables. Une période d'oscillations de grande amplitude dans l'altitude du lac s'ensuit après 9000 années BP et les établissements humains semblent avoir été situé à proximité des marges sur le lac. Aridification et une régression finale du altitude des lacs s'ensuit après 5000 années BP et les communautés humaines sont généralisées éleveurs-pêcheurs-cueilleurs. Au cours de l'Holocène tardif, les altitudes des lacs pourraient avoir chuté en dessous de leur position actuelle et les stratégies de subsistance semblent avoir fait preuve de souplesse et de temps en temps spécialisé sur le pas...

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Lake Turkana and Its Link to the Nile

Cited by 56 publications

References 25 publications

Mitochondrial DNA phylogeography of the Labeobarbus intermedius complex (Pisces, Cyprinidae) from Ethiopia

Mitochondrial DNA phylogeography of the Labeobarbus intermedius complex (Pisces, Cyprinidae) from Ethiopia

Water level history for Lake Turkana, Kenya in the past 15,000years and a variable transition from the African Humid Period to Holocene aridity

Lakeside View: Sociocultural Responses to Changing Water Levels of Lake Turkana, Kenya

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