The Protozoa of Soda Lakes in East Africa

2016 ◽  
pp. 179-204 ◽  
Author(s):  
Andrew W. Yasindi ◽  
William D. Taylor
Keyword(s):  
East Africa ◽  
Soda Lakes

scholarly journals Geotourism, Iconic Landforms and Island-Style Speciation Patterns in National Parks of East Africa

Geoheritage ◽  
2020 ◽  
Vol 12 (3) ◽  
Author(s):  
Roger N. Scoon
Keyword(s):  
East Africa ◽  
National Parks ◽  
Soda Lakes ◽  
Sedimentary Basins ◽  
World Heritage Site ◽  
Darwinian Evolution ◽  
Rift System ◽  
Free Standing ◽  
Albertine Rift ◽  
Northern Tanzania

Abstract Many of the national parks in East Africa are equally as famous for their iconic landforms as they are for their diversity and concentrations of fauna and flora. The newly formed Ngorongoro-Lengai Geopark in northern Tanzania is the first geopark to be established in the region, but there is remarkable potential for geotourism in the majority of the national parks. The most spectacular landforms have been shaped by the East African Rift System. Formation of the two major rifts in the region, the Albertine Rift (or western branch) and the Gregory Rift (or eastern branch), was accompanied, or in some cases preceded, by extensive alkaline volcanism. The rifting and volcanism are primarily Late Cenozoic phenomenon that dissected and overprinted the older regional plateaus. Rifting impacted the regional drainage and captured major rivers, including the Victoria Nile. Chains of ribbon lakes formed in the rift valleys. The Albertine Rift consists of a sequence of sedimentary basins with deep freshwater lakes, but the shallow soda lakes of the Gregory Rift are associated with mostly volcanic terrains. Plateau-style volcanic outpourings smoothed out the older land surfaces, created near-lunar landscapes in parts of the rift valley, and built up rift shoulders to tremendous elevations. Magma erupted from central conduits formed giant stratovolcanoes which reveal evidence of explosive, Plinian-style volcanic activity. East Africa includes some of the largest and best preserved calderas on Earth. The Ngorongoro Caldera is a world heritage site. The ice-capped peaks of the two largest volcanoes in the region, Kilimanjaro and Mount Kenya, are among the highest free-standing mountains on Earth. The region includes active volcanoes, several of which are potentially hazardous as they are located near urban centres. Examples include Longonot-Hells Gate (Kenya), Mount Meru (Tanzania) and Nyiragongo (Democratic Republic of Congo). East Africa is renowned for the unusual rapidity of Darwinian evolution during the past thirty million years, including evolution of primates and hominins, and it is not a coincidence that significant palaeoanthropological discoveries have been unearthed from the Oldupai Gorge and Laetoli sites in northern Tanzania. The evolutionary period coincides with the onset and persistence of rifting and volcanism. Speciation is following an island-style pattern in East Africa, despite the continental setting, as regional plateaus are being dissected by the ongoing rifting and volcanism into smaller and smaller geological terrains. This is illustrated by restriction of the endangered Mountain gorilla to regions where afromontane forests developed in rift-related uplands isolated by extensive savannah grasslands.

Dipping into the Soda Lakes of East Africa

2016 ◽  
pp. 3-24 ◽  
Author(s):  
Michael Schagerl ◽  
Robin W. Renaut
Keyword(s):  
East Africa ◽  
Soda Lakes

Does the potentially toxic cyanobacterium Microcystis exist in the soda lakes of East Africa?

Hydrobiologia ◽  
2011 ◽  
Vol 664 (1) ◽  
pp. 219-225 ◽  
Author(s):  
Kiplagat Kotut ◽  
Lothar Krienitz
Keyword(s):  
East Africa ◽  
Soda Lakes ◽  
Toxic Cyanobacterium

Alkalimonas amylolytica gen. nov., sp. nov., and Alkalimonas delamerensis gen. nov., sp. nov., novel alkaliphilic bacteria from soda lakes in China and East Africa

Extremophiles ◽  
2004 ◽  
Vol 8 (3) ◽  
pp. 193-200 ◽  
Author(s):  
Yanhe Ma ◽  
Yanfen Xue ◽  
William D. Grant ◽  
Nadine C. Collins ◽  
Andrew W. Duckworth ◽  
...  
Keyword(s):  
East Africa ◽  
Soda Lakes ◽  
Alkaliphilic Bacteria

Our Soda Lakes, The Asiatic Brick

1911 ◽  
Vol 71 (1841supp) ◽  
pp. 238-238 ◽  
Keyword(s):  
Soda Lakes

Canoes of East Africa

1918 ◽  
Vol 86 (2228supp) ◽  
pp. 170-170
Keyword(s):  
East Africa

Drawers of Water II: assessing change in domestic water use in East Africa

Waterlines ◽  
2003 ◽  
Vol 22 (1) ◽  
pp. 22-25 ◽  
Author(s):  
John Thompson ◽  
Ina Porras ◽  
Munguti Katui-Katua ◽  
Mark Mujwahuzi ◽  
James Tumwine
Keyword(s):  
East Africa ◽  
Water Use ◽  
Domestic Water

Coffee and qat on the Royal Danish expedition to Arabia – botanical, ethnobotanical and commercial observations made in Yemen 1762–1763

2015 ◽  
Vol 42 (1) ◽  
pp. 101-112
Author(s):  
I. Friis
Keyword(s):  
East Africa ◽  
Arabian Peninsula ◽  
Made In

In spite of widespread consumption of coffee in Europe at the time of the Royal Danish expedition to Arabia 1761–1767, little was known of the cultivation of coffee in Yemen and of the Arabian coffee export to Europe. Fresh leaves of qat were used as a stimulant on the Arabian Peninsula and in East Africa, but before the Royal Danish expedition to Arabia this plant was known in Europe only from secondary reports. Two members of the expedition, Carsten Niebuhr and Peter Forsskål, pioneered studies of coffee and qat in Yemen and of the Arabian coffee export. Linnaeus' instructions for travellers requested observations on the use of coffee, but otherwise Forsskål and Niebuhr's studies of coffee and qat were made entirely on their own initiative. Now, 250 years after The Royal Danish expedition to Arabia, coffee has become one of the world's most valuable trade commodities and qat has become a widely used and banned drug.

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