... processes are stressing the world's arable lands and pastures essential for the provision of food and water and quality air. Aerosol can be both solid and liquid. Natural Environments Imagine that you are out on a camping trip deep within the forest. Learn desertification with free interactive flashcards. In addition such areas also suffer from land degradation due to over-cultivation, overgrazing, deforestation and poor irrigation practices. Also, due to desertification, the soil becomes unsuitable for agriculture, and there may be a huge loss of food. What are 4 ways that human activity can reduce biodiversity? Global warming brought about by increasing greenhouse gas levels in the atmosphere is expected to increase the variability of weather conditions and extreme events. ­The Dust Bowl is a perfect example of desertification, the degradation of dryland ecosystems through a combination of natural and human causes.Droughts are an unavoidable occurrence in semi-arid regions like the Western United States, large portions of sub-Saharan Africa, Central Asia and Latin America. How Does Deforestation Affect Climate Change? Soil is the earth’s fragile skin that anchors all life on Earth. Why does a declining population make a species move vulnerable to extinction? This can contribute to the removal of topsoil and vital soil nutrients needed for food production, and bring about a loss of vegetation cover which would otherwise have assisted with the removal of carbon dioxide from the atmosphere for plant photosynthesis. What ecological changes came with the cultivation of both plants and animals? Alternative Farming and Industrial … What is the most important shift that a society can make to solve today's ecological problems? What is the farming method called monoculture? Humidity levels that reach above 50 percent can worsen factors like mold and mildew, which can cause lung irritation, respiratory issues, and even illness. Climatic change and human impact are the largest factors in desertification. The conversion of a previously soil rich productive area into a desert is called, They remove carbon dioxide and produce oxygen. Light-colored aerosol particles can reflect incoming energy from the sun in cloud-free air and dark particles can absorb it. Firstly, it can mean the process of expansion of an existing desert. Land degradation causes a decline in land productivity and is therefore likely to lead to increased levels of poverty. Increased demand for agriculture commodities generates incentives to convert forests and grasslands to farm fields and pastures. Why do invasive species reproduce rapidly and increase their populations? For instance, desertification processes and reduction of vegetation can lead to the formation of airborne particles affecting cloud formation and rainfall patterns etc. What are the five characteristics of sustainable use? All problems related to desertification can eventually be traced back to water related problems. It’s contributed to the collapse of many major civilizations and empires — from Carthage, to the Harappan Civilization, to Ancient Greece, to the Roman Empire, to Ancient China, etc. Choose from 500 different sets of desertification flashcards on Quizlet. Desertification can also initiate regional shifts in climate which may enhance climate changes due to greenhouse gas emissions. Start studying CH. It is not yet possible, using computer models, to identify with an acceptable degree of reliability those parts of the Earth where desertification will occur. Why can conservation in agriculture save large amounts of water? How does the burning of fossil fuels affects air quality? 6.1-3. In 1994, the UN established the United Nations Convention to Combat Desertification(UNCCD) as the “sole legally binding international agreement linking environment and development to sustainable land management”. They built dams & burned grasslands to encourage the growth of certain plants. Microscopic particles of ash and dust in the air that can cause health problems are called. Harappan Civilization. A mixture of chemicals that occurs as a gray-brown haze in the atmosphere, A harmfull material that can enter the biosphere through the land, air, water, It releases pollutants that can cause smog and other health problems in the atmosphere. 1. Waste water from sinks and toilets contains nitrogen and phos compounds that can encourage the growth of alg and bac in aquatic habitats. What occurred during the Industrial Revolution of the 1800s? Start studying Desertification. What does acid rain contain that kills plants and harms soil? Can regenerate and replaceable but not unlimited example is freshwater, Cann't be replenished by natural processes ex fossil fuels, A way of using natural resources at a rate that doesn't deplete them, They affect the supply and the quality of renewable resources. Land and water management: Sustainable land use can fix issues such as overgrazing, overexploitation of plants, trampling of soils and irrigation practices that cause and worsen desertification. What does protecting an ecosystem ensure? Altering habitats, hunting species, toxic compounds into food webs, introducing foreign species. Desertification. Desertification was defined at the Rio Earth Summit in 1992 as "land degradation in arid, semi-arid and dry sub-humid areas resulting from various factors including climatic variations and human activities". Pollution can also cause the death of the lichen algae, discoloration and reduced growth of the lichen fungus, or kill a lichen completely. THe increase in the average tem of the biosphere. Large dust storms emanating from China affect the Korean peninsula and Japan and are observed to even have an impact on North American air quality. Concentrations of many VOCs are consistently higher indoors (up to ten times higher) than outdoors. The Convention itself was a response to a call at the UN Earth Summitin Rio de Janeiro in 1992 to hold negotiations for an international legal agreement on desertification. Paints, varnishes and wax all contain organic solvents, as d… The total supply of freshwater is limited. Desertification is caused by a combination of factors that change over time and vary by location. Desertification is associated with biodiversity loss and contributes to global climate change through loss of carbon sequestration capacity and an increase in land-surface albedo.. VOCs are emitted by a wide array of products numbering in the thousands.Organic chemicals are widely used as ingredients in household products. Raw materials for medican and food/ other products. The practice of harvesting fish faster than they can reproduce is called, Halibut, cod, salmon, atlantic herring, alaskan king crab. It helped prevent food shortages. Desertification, the process by which natural or human causes reduce the biological productivity of drylands. True or False, Hunting & gathering, agriculture, industry, urban development. One of the impacts which global warming may have on the surface of the Earth is to exacerbate the worldwide problem of desertification. It is well known that deforestation is a big problem in the world today, with hundreds and even thousands of vulnerable forest being cut down both for tinder and to make way for arable farmland for cows and other livestock. 4 #5 Overpopulation and overexploitation of natural resources. What changes in agriculture occurred in the 1800s as a result of advancements in science and technology? Some scientists think it's part of natural variations in climate. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Desertification, then, we can infer, is the process by which a space becomes a desert. It removes the roots that hold the soil in place. What is meant by the phrase the " tragedy of the commons" ? — DESIRE Scientific Report no. Overgrazing by goats, cows, and other herbivores changed grassland ecosystems to shrubs, eroded soil, and put large demands on the water supply. Desertification involves the depletion of vegetation and soils. The herders were locked into a system that eventually led to their ruin. Stability, flexibility, efficiency, productivity, and appropriate technology. What is deforestation and how does it affect the soil? Nitrogen and sulfur compounds. The continued spread of suburban communities across the American landscape is referred to as, Pollute of air, water, soil, produces dense waste products. An increase in desertification-related dust storms is widely considered to be a cause of ill health (fever, coughing, and sore eyes) during the dry season. Although desertification may intensify with a general climatic trend towards aridity, desertification itself can initiate change in local areas. How does plowing the land increase the rate of soil erosion? However, the widely acceptable definition is given by the UNCCD is \"degradation of land in arid and dry sub-humid region caused by several factors including climate change and human activities\". What four human activities have transformed the biosphere? Volatile organic compounds (VOCs) are emitted as gases from certain solids or liquids. How can protecting forests ensure sustainable use of water resources? A decrease in the total amount of rainfall in arid and semi-arid areas could increase the total area of drylands worldwide, and thus the total amount of land potentially at risk from desertification. Desertification, an extreme form of land degradation, is a global phenomenon that is influenced by and has an impact on climate change and biodiversity loss. The process of splitting a habitat into small pieces is called, For meat, fur, or hides. A mixture of hummus, sand, clay, and rock particles, The wearing away of surface soil by water and wind, The soil is loose from the ground. Desertification processes can lead to the formation of large dust clouds that affect air quality and cause health problems thousands of kilometres What is causing the problem of ozone depletion? Aerosols have a measurable effect on climate change. What goods and services do a healthy biosphere provide to us? VOCs include a variety of chemicals, some of which may have short- and long-term adverse health effects. The city has an arid climate and is surrounded by sand dunes, a result of increasing desertification. Desertification can mean two things. Natural habits and the interactions of many diff species are preserved @ the same time. Desertification Top 10 List. It increased food production. Learn vocabulary, terms, and more with flashcards, games, and other study tools. (2 points) Desertification enables dust storms to occur which decreases air quality because as an area becomes less habitable for plants there is more CO2 in the air. The adverse effects of desertification also include floods in heavy rainfall regions, land, water, and air pollution, storms and several other natural disasters, all of which can be fatal to human life. Why have forests been called the "lungs of the earth" ? The increase in the average temp of the biosphere is, A resource that can regenerate and therefore is replaceable is a (an), The agricultural method in which large fields are planted with a single crop year after year is, The sum total of the genetically based variety of all organisms of the biosphere is. Many dryland areas face increasingly low and erratic rainfalls, coupled with soil erosion by wind and the drying up of water resources through increased regional temperatures. Why is biodiversity one of Earth's greatest natural resources? To increase food prod, intensive farming that greatly increase yields of rice, wheat, and other crops, Large fields to be cleared, plowed, and planted with a single crop year after year. What is domestic swage and how does it threaten water supplies? Land degradation and desertification can affect human health through complex pathways. Why was the spread of agriculture an important event in human history? Microscopic particles of ash and dust in the air that can cause health problems are called. Human activity uses as much energy as all the Earth's other multicellular species combined. Some sensitive lichen species develop structural changes in response to air pollution including reduced photosynthesis and bleaching. Such declines may be the result of climate change, deforestation, overgrazing, poverty, political instability, unsustainable irrigation practices, or combinations of these factors. The UNCCD set out … How do human activities affect renewable resources? What is the first step in charting a course that will improve living conditions without harming the environment? Within the subcategory of climate change, one of the biggest causes includes climatic variation. Possibly the most pervasive health consequences of desertification are reductions in air quality caused by the buildup of dust particles in the air. A decrease in the total amount of rainfall in arid and semi-arid areas could increase the total area of drylands worldwide, and thus the total amount of land potentially at risk from desertification. The Convention aims to encourage local communities to regain a sense of respect for, and understanding of, their land and the climatic factors which affect it. Changes in overall economic and institutional settings that create new opportunities for people to earn a living could help relieve current pressures underlying the desertification … Existing drylands, which cover over 40% of the total land area of the world, most significantly in Africa and Asia, will probably be most at risk to climate change. Machines were added and factories to civilization. When productive land becomes arid and useless, the absen… Large-scale watering, new crop varieties and inventions of farm machines. Why are protecting water supplies from pollution and managing demand for water major priorities? Our planet’s ecosystems sustain life only when balanced. The UNCCD set out a definition of dese… Desertification is, therefore, a One of the impacts which global warming may have on the surface of the Earth is to exacerbate the worldwide problem of desertification. The 1990s were the hottest decades ever recorded. Poor indoor air quality, lead paint, and other hazards often coexist in homes, placing children and families at great risk for multiple health problems. Cutting down and burning forests adds carbon dioxide to the atm. The sum total of the genetically based variety of all org in the biosphere, Variety of hab, comm, and ecological processes in the living world, The sum total of all the diff forms of gene infor carried by all org living on earth today, Species of many kinds have provided us with foods, industrial products, and medicines. What benefit of the green revolution to human society? To limit the catch of fish pop stressed by overfishing. Learn how deforestation and desertification can lead to a decline in biological diversity. Deforestation and desertification have grave impacts on the water cycle, the soil, plants, and human beings. The conversion of a previously soil rich productive area into a desert is called ... How does the burning of fossil fuels affects air quality? Hunting that makes relatively few demands on the environment is called, It provided people with 1 of their most basic needs, a dependable supply of food. What 2 properties of DDT make it hazardous over the long term? They kept on adding cattle to their herds to achieve the biggest award. Deforestation can also reduce rainfall in certain areas, increasing the threat of desertification. It's caused by compounds called chlorofluorocarbons aka CFC. Name and briefly describe the major route for human exposure to … What is the purpose of conservation biology? What is the most widely accepted hypothesis about the cause of global warming? About This Quiz & Worksheet. From what resources do we obtain most of the energy to produce and power the machines we use? This is because these areas are especially prone to more permanent damage as different areas of degraded land spread and merge together to form desert-like conditions. Understanding we are part of an ecosystem. In a similar way to how temperature affects the air quality, humidity levels that are too-high or too-low can result in negative effects. Learn how with this lesson. Biological diversity is involved in most services provided by dryland ecosystems and is adversely affected by desertification. Most are produced by natural processes such as erupting volcanoes, and some are from human industrial and agricultural activities. Desertification affects the world’s most vulnerable populations. Over time, sensitive species may be replaced by pollution-tolerant species. 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