Interesting Facts for Kids 8:-Desertification in the Sahel Land covers about 40 percent of the total surface of the earth which makes about 15 billion hectares. As a result, the land is converted to useless land. Another major area that is being impacted by desertification is the. Desertification affects topsoil, groundwater reserves, surface runoff, human, animal and plant populations. As of 1998, the then-current degree of southward expansion of the was not well known, due to a lack of recent, measurable expansion of the desert into the Sahel at the time. There are many different environment-friendly organizations which are working to increase awareness among people regarding the plantation of trees and its benefits. The traditional ability to migrate enabled pastoral nomads and their stock to make flexible use of available resources according to season and yearly variations in rainfall and to move away from regions that had become exhausted after a long period of use.
Wright, David; Rull, Valenti; Roberts, Richard; Marchant, Rob; Gil-Romera, Graciela 26 January 2017. The study of the historical evolution of earth shows that over time deserts have both formed and shrunk entirely independent of human activities. This included at least two species of rails, two species of parrots, and a heron species. An example for this is the salt-flats in the desert in. In the above case, the emphasis is on human activity as the major cause of desertification. If left unmitigated, these stresses will further exacerbate.
Based on these rough estimates, about 1—6% of the people live in desertified areas, while a much larger number is under threat from further. As the population continues to increase the food producing pressure on the rest of the world gets greater. Likewise, the recent drilling of wells has enabled rapid multiplication of domestic livestock numbers and large-scale destruction of the vegetation in a radius of 15—30 kilometers around them. This can cost a lot of money to try and do, so many farmers will have to sell their land and leave the desert areas. As a result of the loss of large trees, the islanders were no longer able to create seaworthy ships. Water scarcity in drylands limits the production of wood, crops, forage and other services that ecosystems provide to our community.
One of the new methods is desertification. Humans can accelerate this process by overgrazing, poor irrigation techniques, diverting rivers, and deforestation. I have spent the past couple of hours watching them and related videos. Unprotected, dry soil surfaces then blow away with the wind or are washed away by flash floods, leaving infertile lower soil layers that bake in the sun and become an unproductive hardpan. In many cases where ecological conditions are favorable because of the existence of such factors as deep, sandy soils, vegetation recovers after excess pressures are eliminated. Disasters Desertification makes natural disasters worse.
Holistic Management Handbook: Healthy Land, Healthy Profits, Second Edition. If people are using land to get natural resources or they are developing it for people to live on, then the policies that govern them should be ones that will help the land to thrive instead of allowing them to harm the land further. Experts have debated whether desertification is irreversible. The residue from pruned trees can be used to provide mulching for fields thus increasing soil water retention and reducing evaporation. This loss was at first caused via large-scale burning of the forests by Maori, and then Europeans, but over time logging has risen to become the dominant cause of deforestation in the region.
Some studies have shown that Africa has lost approximately 650,000 km² of its productive agricultural land over the past 50 years. The deserts are not invading from without; the land is deteriorating from within. These migrations often result in large urban slums that are home to significant numbers of the unemployed. Areas of grassland are disappearing fast in southern regions of the Gobi as the desert land continues to expand. It is caused by a variety of factors, such as climate change and human activities. If the land can no longer support vegetation, life for humans will be more difficult. A mathematical model of this phenomenon proposed by C.
Environmental organizations work in places where deforestation and desertification are contributing to extreme. It could be concluded that the driving mechanisms of the desertification processes in Zhalute banner are mainly the policy of cropland expansion and the rising populations of humans and their livestock, which has affected the land use pattern in the past decades. World Summit on Sustainable Development. Causes, Effects and Solutions of Desertification. As there are many different types of deserts, there are also different types of desert reclamation methodologies. Two such activities are diverting rivers from their natural path for agricultural use and poor irrigation techniques that waste water. And the soils of North Africa began their slow decline pretty soon after large-scale exploitation began.
Done right it can be easily be more for both sides, so easy! Specifically, in the temperate regions, there is a lot of disturbance in term of deforestation that the regeneration of forests is not possible. China is trying hard to prevent further expansion of the Gobi Desert, they are considering planting a ring of forest area known as the 'Green Wall of China' to create a barrier in hope that the new forest area will slow down desertification. Feel free to take a look back at the history of the last 8000 or so years for a glimpse of that reality — the smoking, shredded ruins of civilizations, cultures, value systems, and ethnic identities, are the fertile and chaotic environments where different ways of organizing and experiencing the world begin to emerge and are tested in the very harsh environments of the times. Paleodeserts are large now inactive because they are stabilized by vegetation, some extending beyond the present margins of core deserts, such as the , the largest hot desert. Causes of desertification include overgrazing and removal ofvegetation cover.
This area is increasing further due to human activity thereby giving an example of desertification. Unprotected, dry soil surfaces then blow away with the wind or are washed away by flash floods, leaving infertile lower soil layers that bake in the sun and become an unproductive hardpan. Or, to put it in another way, desertification results in persistent degradation of dryland and fragile due to man-made activities and variations in climate. We have indeed responded in both ways you outline above — acceptance which often leads to collapse via the over-stressing of established infrastructure and systems as seen in Sweden , or the closing off of borders which almost invariably leads to war, insurgencies, and persistent endemic irregular warfare as seen in Croatia, Serbia, Hungary and others. Poor irrigation techniques on farms can also lead to desertification.
The lake has shrunk by 94% since the 1960s. The nature of Mediterranean Europe: An ecological history. In their daily struggle to survive, these expanding populations have put a deadly strain on their environment. Extinction Species extinction is one of the most prominent effects of desertification. These migrations into the cities often cause large numbers of unemployed people, who end up living in. Currently, the Gobi desert is the fastest moving desert on Earth; according to some researchers, the Gobi Desert swallows up over 1,300 square miles 3,370 km² of land annually. Livestock production is a contributing factor in species extinction, desertification, and habitat destruction.