desert and desertification slideshare

Read at : Google Alert - desertification http://www.slideshare.net/al3oufi/desertification-12841527 Desertification Slideshare See our Privacy Policy and User Agreement for details. Sometimes this is caused by climate changes, but more often than not it is a Across the world, desertification affects the livelihoods of millions of people who rely on the benefits that dryland ecosystems can provide. Sometimes PPT. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Desertification PRESENTED BY HALIMA ZEB ABBASI 1 2. The desert areas may be arid, semi-arid and dry sub-humid featuring well stored sands. 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. See our Privacy Policy and User Agreement for details. 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. 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. 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. is the process by which land becomes desert; 2 Case study the Sahel. Most part of animals try to avoid Precipitation levels are in the Thar Desert are very low, between 120-240mm, and evaporation rates are high. is the process by which land becomes desert; 2 Case study the Sahel. 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). Addressing desertification is critical and essential to meeting the Millennium Development Goals. 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. Deserts And Desertification (Slideshare) http://www.slideshare.net/WERI/deserts-and-desertification-the-causes-consequences-and-challenges-presentation. Deserts conjure up specific ideas about topography: typically, that they are dry and sandy dunes or rock, or a mixture of both. We live in a world where climate change is often a hot topic of discussion. 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 , … deserts, deserts in world ,desertification definition & it's types , causes of desertification, measures taken to prevent desertification . 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. A string of dry years shriveled vegetation in Africa's Sahel, causing some to fear that the Sahara Desert was shifting south. Desertification can exist at high altitudes too, however – and when this happens, the desert will be cold. If you continue browsing the site, you agree to the use of cookies on this website. 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. 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). Desertification refers to the persistent degradation of dryland ecosystems by climatic variations and human activities. 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… 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. 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. Now customize the name of a clipboard to store your clips. Desertification is the persistent degradation of dryland ecosystems.It affects the livelihoods of millions of people. Now customize the name of a clipboard to store your clips. Development challenges in the Thar Desert. The U.N. Convention to Combat Desertification (UNCCD) defines it as land degradation in arid, semiarid and dry subhumid areas resulting from various factors, including climatic … 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. • It is a process by which fertile land is transformed into desert. Desertification By: Andrew Augustus Anne Bragg What is Desertification Desertification is the degradation of land in arid and dry sub-humid areas, resulting primarily ... – A free PowerPoint PPT presentation (displayed as a Flash slide show) on PowerShow.com - id: 7a7975-MjhmM Desertification, then, we can infer, is the process by which a space becomes a desert. But deserts are far more than this and there are multiple types. Presentation Summary : Desertification The process which turns productive desert land into non-productive. 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. Water supply. Water supply. Precipitation levels are in the Thar Desert are very low, between 120-240mm, and evaporation rates are high. 3. But more than simp… We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. 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. The Millennium Ecosystem Assessment developed four plausible scenarios to explore the future of desertification and human well-being until 2050 and beyond. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Clipping is a handy way to collect important slides you want to go back to later. You often hear about temperature changes, sea level rising, and shifting climate zones. 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 process when the biotic pump is absent (Makarieva and Gorshkov 2007). You can change your ad preferences anytime. The desert areas may be arid, semi-arid and dry sub-humid featuring well stored sands. Although the end-product is similar, Desertification is nothing like the preexisting deserts of our planet which consist of diverse dryland ecosystems and countless species. Ice deserts. However, something that we don't hear so much about is that over recent years there has been an desertification 1. 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.”. Desertification: Desert is a region almost devoid of vegetation due to low rainfall. Used with Stanadard Grade pupils at S3 as an introduction to the topic and with S4 pupils as revision. See our User Agreement and Privacy Policy. APIdays Paris 2019 - Innovation @ scale, APIs as Digital Factories' New Machi... No public clipboards found for this slide. It occurs on all continents (except Antarctica) and affects the livelihoods of millions of people, including a large proportion of the poor in drylands. If you continue browsing the site, you agree to the use of cookies on this website. 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. https://www.slideshare.net/IlenyaDimech/desertification-58141961 DESERTIFICATION DEFINITION process by which the land is turned to desert CAUSES NATURAL – climate HUMAN – non-sustainable farming methods . However, those plants have some defensive mechanisms like sharp spines and chemical-laden leaves which are used to discourage vegetal-eaters. The simple explanation is that deserts are topographic landscapes that receive little precipitation in a typical year. See our User Agreement and Privacy Policy. Desertification in the US * * * * * * Precursers 10-fold increase in population between 1860 and 1920. Desertification . Desertification is the process of land turning into desert as the quality of the soil declines over time. What is desertification? - an increasing population results in larger desert areas being farmed. deserts, deserts in world ,desertification definition & it's types , causes of desertification, measures taken to prevent desertification . Desertification is the persistent degradation of dryland ecosystems by variations in climate and human activities. 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 can exist at high altitudes too, however – and when this happens, the desert will be cold. Home to a third of the human population in 2000, drylands occupy nearly half of Earths land area. Desertification is a result of a long-term failure to balance demand for and supply of ecosystem services in drylands. If you continue browsing the site, you agree to the use of cookies on this website. Sheep, cattle and goats are … A good example is the deserted rocky peaks of a mountain. 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. Raising awareness of the problem 16. Firstly, it can mean the process of expansion of an existing desert. A good example is the deserted rocky peaks of a mountain. Ice deserts. The threshold is 10 inches, or 25cm. This is a presentation about desertification, the causes of desertification and how to control desertification. • It becomes progressively drier • Unable to support any plant growth for food production. 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. desertification, sandization, arid lands, arid, semi-arid and dry sub-humid climates, ... some desert-areas animals come from eating plants of the same area of them. The Sahel as an example 5. 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. The pressure is increasing on dryland ecosystems for providing services such as food, forage, fuel, building materials, and water for humans and livestock, for irrigation, and for sanitation. The process by which fertile land becomes desert, typically as a result of drought, deforestation, or inappropriate agriculture. Looks like you’ve clipped this slide to already. What is desertification • Desertification is land degradation process in arid and semi-arid areas. typically losing its bodies of water as well as vegetation and wildlife. The International Film Festival entitled ‘Desert Nights - Tales from the Desert’ in Rome in December 2006 is an example of one such awareness–raising initiative. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Hot deserts are hostile, remote and challenging environments for development. 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. Desertification: 4. The former includes indirect factors like population pressure, socioeconomic and policy factors, and globalization phenome… The Millennium Ecosystem Assessment developed four plausible scenarios to explore the future of desertification and human well-being until 2050 and beyond. Customer Code: Creating a Company Customers Love, Be A Great Product Leader (Amplify, Oct 2019), Trillion Dollar Coach Book (Bill Campbell). Desertification . If you continue browsing the site, you agree to the use of cookies on this website. Using terms like “desert encroachment,” however, often conjures up misguided images of deserts that expand aggressively, colonizing the surrounding land. Development challenges in the Thar Desert. 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. Deep ... – A free PowerPoint PPT presentation (displayed as a Flash slide show) on PowerShow.com - id: 419844-ZGYwM We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. Desertification The Process Which Turns Productive Desert Land Into Non Productive. 3. Addressing desertification is critical and essential to meeting the Millennium Development Goals. Clipping is a handy way to collect important slides you want to go back to later. Desertification: Desert is a region almost devoid of vegetation due to low rainfall. No public clipboards found for this slide. Desertification was singled out as a key instrument for poverty eradication in dryland rural areas. Looks like you’ve clipped this slide to already. 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. Desertification can mean two things. Desertification is a process of gradual degradation of productive arid and semi-arid land into biologically unproductive land due to natural or anthropogenic factors. You can change your ad preferences anytime. In recent years, the desert has expanded in some areas, its sands enveloping farms and villages as a result of desertification. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. This increase is attributed to a combination of human factors and climatic factors. 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. O SlideShare utiliza cookies para otimizar a funcionalidade e o desempenho do site, assim como para apresentar publicidade mais relevante aos nossos usuários. https://www.slideshare.net/lab82/deserts-and-desertification-powerpoint Desertification is a process of gradual degradation of productive arid and semi-arid land into biologically unproductive land due to natural or anthropogenic factors. 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. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Read at : Google Alert - desertification http://www.slideshare.net/al3oufi/desertification-12841527 Desertification Slideshare , desertification affects the livelihoods of millions of people often hear about temperature changes, sea level,... A good example is the process by which land becomes desert ; 2 Case study the Sahel into biologically land... Your LinkedIn profile and activity data to personalize ads and to show you relevant... Have some defensive mechanisms like sharp spines and chemical-laden leaves which are used to discourage vegetal-eaters dryland can... Is critical and essential to meeting the Millennium Ecosystem Assessment developed four plausible scenarios explore! And User Agreement for details 10-fold increase in population between 1860 and 1920 ecosystems by climatic variations human. 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