Desertification can exist at high altitudes too, however – and when this happens, the desert will be cold. deserts, deserts in world ,desertification definition & it's types , causes of desertification, measures taken to prevent desertification . You can change your ad preferences anytime. No public clipboards found for this slide. 3. Desertification is a process of gradual degradation of productive arid and semi-arid land into biologically unproductive land due to natural or anthropogenic factors. Most part of animals try to avoid Desertification . O SlideShare utiliza cookies para otimizar a funcionalidade e o desempenho do site, assim como para apresentar publicidade mais relevante aos nossos usuários. Addressing desertification is critical and essential to meeting the Millennium Development Goals. Desertification . Desertification: Desert is a region almost devoid of vegetation due to low rainfall. The Desert, Deserts of the World See Also: Desert Survival Tips , Overviews , Geography Index For MORE links, lessons and loads of other goodies for teachers and kids, continue on to see what Mr. Donn has for Landforms : including Mountains , Oceans , Rivers , Lakes , Islands , Plains , Coasts , … You can change your ad preferences anytime. Water supply. The Sahel is becoming more like desert with thin, dry, sandy soils ; Soil erosion has created bare rock ; Vegetation is sparse; 3 The UN environment programme took up combating desertification as a major part of its work. Africa is the continent most affected by desertification, and one of the most obvious natural borders on the landmass is the southern edge of the Sahara desert.The countries that lie on the edge of the Sahara are among the poorest in the world, and they are subject to periodic droughts that devastate their peoples. Desertification has occurred because desert ecosystems, which cover over one third of the world's land area, are extremely vulnerable to overexploitation and inappropriate land use, compounded by poverty, political instability, deforestation, overgrazing, and wasteful irrigation practices. Addressing desertification is critical and essential to meeting the Millennium Development Goals. Desertification: Desert is a region almost devoid of vegetation due to low rainfall. Desertification process when the biotic pump is absent (Makarieva and Gorshkov 2007). Now customize the name of a clipboard to store your clips. Presentation Summary : Desertification The process which turns productive desert land into non-productive. Home to a third of the human population in 2000, drylands occupy nearly half of Earths land area. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Precipitation levels are in the Thar Desert are very low, between 120-240mm, and evaporation rates are high. Customer Code: Creating a Company Customers Love, Be A Great Product Leader (Amplify, Oct 2019), Trillion Dollar Coach Book (Bill Campbell). An immense issue that numerous nations have is the way that there are large pockets of land that are experiencing a procedure that is known as desertification. Sometimes PPT. typically losing its bodies of water as well as vegetation and wildlife. Desertification is the degradation of grasslands, savannas , and woodlands to a more desert-like condition, with resulting decrease in plant production and the land's ability to support livestock grazing or other human uses.Vegetation becomes sparse; exposed soil becomes more vulnerable to erosion; and yields from cropland or grazing are reduced. Looks like you’ve clipped this slide to already. Desertification PRESENTED BY HALIMA ZEB ABBASI 1 2. Desertification can mean two things. You often hear about temperature changes, sea level rising, and shifting climate zones. Desertification is a process of gradual degradation of productive arid and semi-arid land into biologically unproductive land due to natural or anthropogenic factors. Development challenges in the Thar Desert. Hot deserts are hostile, remote and challenging environments for development. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. A cold desert may be sandy or rocky, but it will be a harsh environment where organisms have adapted in weird and wonderful ways so that they can survive. Satellite data spanning more than twenty years now shows that the Sahel is holding its own against the Sahara and may be recovering with the return of near-normal rainfall. is the process by which land becomes desert; 2 Case study the Sahel. We live in a world where climate change is often a hot topic of discussion. https://www.slideshare.net/lab82/deserts-and-desertification-powerpoint desertification 1. Deep ... – A free PowerPoint PPT presentation (displayed as a Flash slide show) on PowerShow.com - id: 419844-ZGYwM Using terms like “desert encroachment,” however, often conjures up misguided images of deserts that expand aggressively, colonizing the surrounding land. Desertification is the persistent degradation of dryland ecosystems.It affects the livelihoods of millions of people. The Sahel as an example 5. See our User Agreement and Privacy Policy. A good example is the deserted rocky peaks of a mountain. Ice deserts. Desertification or Expanding desert • The United Nations official definition says desertification is land degradation in typically dry areas resulting from various factors, including climatic variations and human activities. Desertification is a type of land degradation in drylands in which biological productivity is lost due to natural processes or induced by human activities whereby fertile areas become increasingly more arid. Desertification in the US * * * * * * Precursers 10-fold increase in population between 1860 and 1920. Ice deserts. APIdays Paris 2019 - Innovation @ scale, APIs as Digital Factories' New Machi... No public clipboards found for this slide. Clipping is a handy way to collect important slides you want to go back to later. Raising awareness of the problem 16. https://www.slideshare.net/IlenyaDimech/desertification-58141961 Whether through reduced PR, or the lack of a biotic pump effect, reduced forest cover appears to reinforce conditions that weaken the likelihood of precipitation. • It is a process by which fertile land is transformed into desert. Clipping is a handy way to collect important slides you want to go back to later. The Tarim Desert Highway links the cities of Hotan (on the southern edge) and Luntai (on the northern edge) and the Bayingol to Ruoqiang road crosses the desert to the east. Desertification can exist at high altitudes too, however – and when this happens, the desert will be cold. But deserts are far more than this and there are multiple types. It occurs on all continents (except Antarctica) and affects the livelihoods of millions of people, including a large proportion of the poor in drylands. The different scenarios are based on either increased globalization or increased regionalization, each combined with either a reactive or proactive way of addressing environmental issues. Firstly, it can mean the process of expansion of an existing desert. This increase is attributed to a combination of human factors and climatic factors. This is a destructive process where a fertile land filled with greenery and its own specific diverse wildlife converts into a barren land, which is similar to a desert. We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. The adverse impacts of desertification on dryland ecosystem services and limited success in rehabilitation demonstrate that it is more cost-effective to prevent desertification (C22.3.2, C22.6, R17). The simple explanation is that deserts are topographic landscapes that receive little precipitation in a typical year. What is desertification? How we define the desert biome are not about the types of rock, or the amount of sand, or even the temperature because there are both cold and hot deserts. Precipitation levels are in the Thar Desert are very low, between 120-240mm, and evaporation rates are high. Desertification refers to the persistent degradation of dryland ecosystems by climatic variations and human activities. However, something that we don't hear so much about is that over recent years there has been an A cold desert may be sandy or rocky, but it will be a harsh environment where organisms have adapted in weird and wonderful ways so that they can survive. Deserts conjure up specific ideas about topography: typically, that they are dry and sandy dunes or rock, or a mixture of both. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. A string of dry years shriveled vegetation in Africa's Sahel, causing some to fear that the Sahara Desert was shifting south. Desertification: 4. Desertification, to put it plainly, is when land that was initially of another kind of biome transforms into a desert biome on account of changes of various types. Across the world, desertification affects the livelihoods of millions of people who rely on the benefits that dryland ecosystems can provide. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. 3. The process by which fertile land becomes desert, typically as a result of drought, deforestation, or inappropriate agriculture. Now customize the name of a clipboard to store your clips. Sometimes this is caused by climate changes, but more often than not it is a Deserts And Desertification (Slideshare) http://www.slideshare.net/WERI/deserts-and-desertification-the-causes-consequences-and-challenges-presentation. The threshold is 10 inches, or 25cm. The Millennium Ecosystem Assessment developed four plausible scenarios to explore the future of desertification and human well-being until 2050 and beyond. Desertification has occurred because desert ecosystems, which cover over one third of the world's land area, are extremely vulnerable to overexploitation and inappropriate land use, compounded by poverty, political instability, deforestation, overgrazing, and wasteful irrigation practices. Desertification, then, we can infer, is the process by which a space becomes a desert. Hot deserts are hostile, remote and challenging environments for development. Desertification, to put it plainly, is when land that was initially of another kind of biome transforms into a desert biome on account of changes of various types. HUMAN LAND USES AR… O SlideShare utiliza cookies para otimizar a funcionalidade e o desempenho do site, assim como para apresentar publicidade mais relevante aos nossos usuários. • It becomes progressively drier • Unable to support any plant growth for food production. The former includes indirect factors like population pressure, socioeconomic and policy factors, and globalization phenome… Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Desertification is a result of a long-term failure to balance demand for and supply of ecosystem services in drylands. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Used with Stanadard Grade pupils at S3 as an introduction to the topic and with S4 pupils as revision. is the process by which land becomes desert; 2 Case study the Sahel. Looks like you’ve clipped this slide to already. According to UN’s Agenda 21, desertification is, “Land degradation in arid, semi-arid and dry sub-humid areas resulting from various factors, including climatic variations and human activities.”. What is desertification • Desertification is land degradation process in arid and semi-arid areas. Considerable controversy exists over the proper definition of the term “desertification” for which Helmut Geist (2005) has identified more than 100 formal definitions.The most widely acceptedof these is that of the Princeton University Dictionary which defines it as “the process of fertile land transforming into desert typically as a result of deforestation, drought or improper/inappropriate agriculture” The earliest known discussion of the topic arose soon after the French colonization of West Africa, when the Comité d’Etud… Desertification is the process of land turning into desert as the quality of the soil declines over time. The Sahel is becoming more like desert with thin, dry, sandy soils ; Soil erosion has created bare rock ; Vegetation is sparse; 3 The UN environment programme took up combating desertification as a major part of its work. Desertification is the persistent degradation of dryland ecosystems by variations in climate and human activities. deserts, deserts in world ,desertification definition & it's types , causes of desertification, measures taken to prevent desertification . Sheep, cattle and goats are … Desertification The Process Which Turns Productive Desert Land Into Non Productive. The Millennium Ecosystem Assessment developed four plausible scenarios to explore the future of desertification and human well-being until 2050 and beyond. In recent years, the desert has expanded in some areas, its sands enveloping farms and villages as a result of desertification. The U.N. 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