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  1. The Great Green Wall: a hope for greening the Sahel ...

    www.encyclopedie-environnement.org › en › life

    The Sahel is considered one of the most vulnerable areas on Earth. It is a set of ecosystems made up of steppes and shrubby savannah with trees crossing the African continent from west to east and marking the eco-geographical transition between the Sahara desert in the north and the Sudanese zone in the south.

  2. This region is made up of six countries hosting rich tropical rainforests - particularly in the Congo Basin - on which human activities exert pressure to the detriment of their forest cover. The Sahel zone, where the Great Green Wall is located, is made of steppes and wooded savannas, which are also affected by deforestation, mainly due to overgrazing.

  3. Sahara desert to the north and the tropical savannas to the south (Herrmann, 2005). It covers parts of Senegal, Mauritania, Mali, Burkina Faso, Algeria, Niger, Chad, South Sudan, North Sudan and Eritrea (UNEP, 2012). The Sahel climate is characterised by a long dry season and a short humid season (Nicholson, 1995). The ecosystem is

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  5. Noteworthy Threatened Plant Species in the Sahel Region ...

    www.intechopen.com › online-first › noteworthy

    The Sahel region and some part of the savannah region bordered with Niger Republic faced the menace of drought and desertification that leads to soil erosion and distraction of the ecosystem entirely . The confrontational effect is caused by the rampant cutting of trees, loss of ground cover and continuous overgrazing by livestock of the Fulani herdsmen.

    • Abdallah Muhammad Salihu, Rusea Go
    • 2020
  6. Climate-Driven Ecosystem Succession in the Sahara: The Past ...

    science.sciencemag.org › content › 320/5877/765

    Strong reductions in tropical trees and then Sahelian grassland cover allowed large-scale dust mobilization from 4300 calendar years before the present (cal yr B.P.). Today's desert ecosystem and regional wind regime were established around 2700 cal yr B.P.

    • S. Kröpelin, D. Verschuren, A.-M. Lézine, H. Eggermont, C. Cocquyt, P. Francus, P. Francus, J.-P. Ca...
    • 595
    • 2008
  7. As the Sahel dries, the Sahara advances - Landscape News

    news.globallandscapesforum.org › 40544 › as-the

    The Sahelian belt is considered a region of transition between the Sahara Desert to the north and the tropical forests to the south. A tapestry of grasslands, savannas and shrublands, it gets most of its rain between June and September, varying across its latitude – annually, less than 200 millimeters in the north and more than 800 millimeters in the south.

  8. (PDF) Ecosystem Dynamics and the Sahel Drought

    www.researchgate.net › publication › 239957801

    Ecosystem Dynamics and the Sahel Drought. ... We use a coupled biosphere-atmosphere model including explicit representation of ecosystem dynamics to demonstrate that, regardless of the nature of ...

  9. growing season | National Geographic Society

    www.nationalgeographic.org › growing-season

    The Sahel is a transition zone between the Sahara Desert in the north and the savanna in the south. Due to dramatic weather pattern s, the prospect of a successful harvest in the Sahel is highly uncertain.

  10. Why is the Sahel shifting? | HowStuffWorks

    science.howstuffworks.com › sahel-shifting

    Sep 17, 2008 · It appears the Sahara desert is expanding southward and infringing on the Sahel, and it's estimated that more than 80 percent of the land is affected by the shift [source: IRIN]. Just south of the Sahel region is the northernmost edge of Africa's tropical rainforests, as well as a rain belt that fluctuates naturally north and south with the seasons. Repositioning the rain belt farther north would bring rains and vegetation into the Sahel and the Sahara desert; move it south and the Sahel ...

  11. 2.4 Rainforests & Deserts - GEOGRAPHY FOR 2021 & BEYOND

    www.geographypods.com › 24-rainforests--deserts

    1) Tropical Rainforest 2) Tropical Desert A biome is made of many similar ecosystems. Ecosystems are the interactions between the living things and the nonliving things in one location. In an ecosystem, the plants, animals, and other organisms rely on each other and on the physical environment – the soil, water, and nutrients, for example.

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