logging in or signing up ECOLOGICAL BACKLASHES aSGuest105339 Download Post to : URL : Related Presentations : Share Add to Flag Embed Email Send to Blogs and Networks Add to Channel Uploaded from authorPOINT lite Insert YouTube videos in PowerPont slides with aS Desktop Copy embed code: Embed: Flash iPad Dynamic Copy Does not support media & animations Automatically changes to Flash or non-Flash embed WordPress Embed Customize Embed URL: Copy Thumbnail: Copy The presentation is successfully added In Your Favorites. Views: 4613 Category: Entertainment License: All Rights Reserved Like it (0) Dislike it (0) Added: July 18, 2011 This Presentation is Public Favorites: 0 Presentation Description No description available. Comments Posting comment... Premium member Presentation Transcript ECOLOGICAL BACKLASHES: ECOLOGICAL BACKLASHES By: Group 3What is Ecological Backlashes??: What is Ecological Backlashes?? The Human Activities that result in the destruction of the Balance of Nature Ecological backlash involves the counter-responses of pest populations or other biotic factors in the environment that diminish the effectiveness of pest management tactics. Many of these counter responses result from heavy mortality burdens imposed by the pest management tactics.Floods: Floods A flood is an overflow of an expanse of water that submerges land. Flooding may result from the volume of water within a body of water, such as a river or lake, which overflows or breaks levees, with the result that some of the water escapes its usual boundaries. Causes of Floods: Causes of Floods Caused by some significant and unexpected events, for instance dam breakages . Deforestation is one of the major causes of floods. T he eroded soil gets settled at the bottom of rivers and seas, which raises the level of water in rivers and seas, which consequently causes floods . Heavy rainfalls are one of the major causes of floods. The level of water in rivers or lakes rises due to heavy rainfalls.Effects of Floods: Effects of Floods Physical damage – Can damage any type of structure, including bridges, cars, buildings, sewerage systems, roadways, and canals. Diseases – Unhygienic conditions. Spread of water-borne diseases. Economic – Economic hardship, due to: temporary decline in tourism, rebuilding costs, food shortage leading to price increase, etc . Water supplies – Contamination of water. Clean drinking water becomes scarce.Floods(Pictures): Floods(Pictures) Typhoon Uring (Thelma) struck Ormoc City on Nov 5 – 1991. Heavy rains resulted in a flash flood that killed over 4,000 residents as it raced through town, (some reports have the death toll as high as 8,500). Heavy rains have poured without let-up in Metro Manila due to Bagyong Ondoy , causing massive flooding across the metropolis, and floods have reached chest level in some areas.Global Warming: Global Warming the current rise in the average temperature of Earth's oceans and atmosphere and its projected continuation. The scientific consensus is that global warming is occurring and was initiated by human activities, especially those that increase concentrations of greenhouse gases in the atmosphere, such as deforestation and burning of fossil fuels.Causes of Global Warming: Causes of Global Warming Burning fossil fuels is one thing that causes Global Warming Another major man-made cause of Global Warming is population. More people means more food, and more methods of transportation. That means more methane because there will be more burning of fossil fuels (if you're into gas burning cars like our planet is), and more agriculture . Cutting down trees that Convert CO 2 to OxygenEffects of Global Warming: Effects of Global Warming Melting of Glaciers that bring gradual rise in sea level. C limate change, the probabilities of certain types of weather events are affected. Climate change will impact agriculture and food production around the world due to: the effects of elevated CO2 in the atmosphere, higher temperatures, altered precipitation and transpiration regimesGlobal Warming(Pictures): Global Warming(Pictures)Acid Rain: Acid Rain A rain or any other form of precipitation that is unusually acidic, meaning that it possesses elevated levels of hydrogen ions (low pH) Acid rain is caused by emissions of sulfur dioxide and nitrogen oxides which react with the watermolecules in the atmosphere to produce acids. Trees killed by acid rainCauses of Acid Rain: Causes of Acid Rain Emissions of sulfur dioxide and nitrogen oxides which react with the watermolecules in the atmosphere Can also be produced naturally by lightning strikes and sulfur dioxide is produced by volcanic eruptions Effects of Acid Rain: Effects of Acid Rain It can have harmful effects on plants, aquatic animals, and infrastructure. The chemicals found in acid rain can cause paint to peel and stone statues to begin to appear old and worn down, which reduces their value and beauty . Adverse effects may be indirectly related to acid rain, like the acid's effects on soil (see above) or high concentration of gaseous precursors to acid rain.Acid Rain(Pictures): Acid Rain(Pictures) Effect of acid rain on statuesDeforestation: Deforestation The removal of a forest or stand of trees where the land is thereafter converted to a non-forest use Examples of deforestation include conversion of forestland to farms, ranches, or urban use.Causes of Deforestation: Causes of Deforestation The cutting down of trees for lumber that is used for building materials, furniture, and paper products. Forests are also cut down in order to clear land for growing crops . Trees are cut down in developing countries to be used as firewood or turned into charcoal, which are used for cooking and heating purposes.Effects of Deforestation: Effects of Deforestation Regulation of the flow of water is disrupted, which leads to alternating periods of flood and then drought in the affected area . Due to massive deforestation, about 50 to 100 species of animals are being lost each day. The outcome of which is the extinction of animals and plants on a massive scale. Large tracts of land will be rendered permanently impoverished due to soil erosion.Deforestation(Pictures): Deforestation(Pictures) Deforestation for the use of clay in the Brazilian city of Rio de Janeiro. Commercial logging is the single most important factor for Amazon rainforest deforestation You do not have the permission to view this presentation. In order to view it, please contact the author of the presentation.