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- The Sahel or Sahel Belt (from Arabic ساحل, sāḥil, shore, border or coast of the Sahara) is a semi-arid tropical savanna ecoregion in Africa, which forms the transitional zone between the Sahara Desert to the north and the more humid savanna belt to the south known as the Sudan (not to be confused with the country of the same name).
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Nov 21, 2023 · Biotic factors are all the living organisms, while abiotic factors are the non-living things in an ecosystem. The characteristic abiotic factors of the desert are stony or sandy soils and...
- Early Agriculture
- Sahelian Kingdoms
- Transhumance
- Twentieth Century Droughts
- Looking to The Future
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The first instances of domestication of plants for agricultural purposes in Africa occurred in the Sahel region circa 5000 B.C.E., when sorghumand African Rice began to be cultivated. Around this time, and in the same region, the small Guineafowl were domesticated. Around 4000 B.C.E. the climate of the Sahara and the Sahel started to become drier a...
The Sahelian kingdoms were a series of empires, based in the Sahel, which had many similarities. The wealth of the states came from controlling the Trans-Saharan trade routes across the desert. Their power came from having large pack animals like camels and horses that were fast enough to keep a large empire under central control and were also usef...
Traditionally, most of the people in the Sahel have been semi-nomads, farming and raising livestock in a system of transhumance, which is probably the most sustainable way of utilizing the Sahel. The difference between the dry north with higher levels of soil-nutrients and the wetter south is utilized so that the herds graze on high quality feed in...
There was a major drought in the Sahel in 1914, caused by annual rains far below average, that caused a large-scale famine. The 1960s saw a large increase in rainfall in the region, making the northern, drier, region more accessible. There was a push, supported by governments, for people to move northward, and as the long drought-period from the la...
The people of the Sahel have been both victims and abusers of the environment. Destructive measures have been implemented in the region, such as the clearing of large areas of the green belt of all vegetation in order to make way for annual crops. A system such as increasing the population of perennials in the agriculturalzone would stabilize the l...
Eden Foundation. Desertification—a threat to the Sahel.August 1994. Retrieved December 19, 2008.National Geographic Society. Sahelian Acacia savanna (AT0713).Retrieved December 19, 2008.O'Brien, Patrick K. Oxford Atlas of World History. New York, NY: Oxford University Press, 2010. ISBN 978-0199746538Organisation for Economic Co-operation and Development, Jean-Paul Azam, Christian Morrisson, Sophie Chauvin, and Sandrine Rospabé. Conflict and Growth in Africa. Vol. 1, The Sahel. Development Cent...- Temperature as Abiotic Factors of the Sahara Desert. a. Extreme temperature ranges. The Sahara Desert experiences high daytime temperatures year-round, with summer averages around 104-113°F in the hottest areas.
- Precipitation. a. Low rainfall patterns. The Sahara Desert receives little rainfall, with annual averages ranging from 0-4 inches. Precipitation occurs sporadically and unpredictably.
- Wind. a. Prevailing wind patterns. The Sahara wind regime is dominated by the dry, sinking air of the subtropical anticyclone and trade winds blowing from the northeast.
- Sunlight. Sunlight is an essential aspect of our environment that is important in many biological processes. It provides energy to support various metabolic activities and influences the growth and development of organisms.
Jun 21, 2021 · A Desert ecosystem is the interaction between both the Biotic and Abiotic components of the environment. DESERT ECOSYSTEM CHARACTERISTICS. Here are some basic Desert ecosystem characteristics –. Aridity. It is the common characteristic of all the deserts on the earth. Aridity simply implies the deficiency of moisture’s or dryness.
Try and classify them based on whether they’re living or non-living - so the predators and competition will be biotic factors, while pH will be abiotic. Together, these factors decide what range of conditions an organism can survive within.
Desert ecology is the study of interactions between both biotic and abiotic components of desert environments. A desert ecosystem is defined by interactions between organisms, the climate in which they live, and any other non-living influences on the habitat.
Sep 9, 2003 · Over a large region, such as the Sahara or the Sahel, the coupled behavior of environmental systems are often expressed through strong biogeochemical, biophysical, and hydrological linkages among terrestrial ecosystems, aquatic ecosystems, and the atmosphere.
