water for the growing human population (RedOrbit‚ 2008). The lake is still a major water source for Mexico City: for drinking‚ irrigation‚ recreation‚ and tourism. The lake provides a rich diversity of species although wastewater and agricultural runoff flow into the lake affecting the amount of dissolved solids (Lopez‚ Sedeño-Díaz‚ & Perozzi.‚ 2006). Nitrates‚ sulfates‚ ammonia‚ and other dissolved
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Definition: Coral reefs are underwater structures made from calcium carbonate secreted by corals. Corals are colonies of tiny living animals found in marine waters containing few nutrients. Most coral reefs are built from stony corals‚ and are formed by polyps that live together in groups. The polyps secrete a hard carbonate exoskeleton which provides support and protection for the body of each polyp. Reefs grow best in warm‚ shallow‚ clear‚ sunny and agitated waters. Often called “rainforests
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Hill‚ Patricia Garth‚ Anderson Period 5 29‚ October‚ 2012 The Instant Runoff Amendment It is time for America to stop choosing its president by an archaic‚ confusing‚ and undemocratic method. As the 2000 election has shown‚ using the Electoral College lets a candidate win the Presidency even if a larger number of voters prefer and vote for someone else. Getting rid of the Electoral College may be very hard‚ but by writing
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Ecology EQ’s 2. Abiotic and biotic components influence each other. For instance‚ temperature (abiotic factor) can make plants (biotic factor) reproduce more or reproduce less. Also water‚ an abiotic factor‚ has an effect on how animals‚ a biotic factor‚ survive in certain areas of the world. 3. Because a different niche allows multiple species of organisms to coexist. If all organisms had the same niche‚ then there would be heavy competition for food‚ shelter‚ etc. Having different niches gives
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Ecology Pyramids 1. a. Sunlight b. 3190000kcal per square meter per year 2. 3. a. .8% b. Photosynthesis 4. By eating the organisms in the previous level 5. 400o0 kcal 6. 7. 8. 90% of energy is lost as heat as it is transferred through trophic levels 9. .6% 10. .09% 11. Only a tiny fraction of the original energy remains. The biomass would have to increase substantially if this system were to support another trophic level beyond the hawk 12. Since little energy is available for a single
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On the Mississippi River in New Orleans‚ there is a place where ships drop out of the water. These ships catch a current and go at least thirty feet‚ and then the ships will continue to descend to the east or south. This movement of the ships shows that there is a relationship between the rivers and the terrain that is around them‚ which can be seen with any river‚ not just the Mississippi. For the New Orleans River‚ the adjacent terrain is Cajun Country. There is a triangle formed in southern Louisiana
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Runoff is a problem when farmers use too much nitrogen on their crops to help them grow and the excess nitrogen flows into creek and other bodies of water when it rains. This excess nitrogen causes more algae to grow in an algae bloom‚ which causes the bacteria
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results in an increase in phytoplankton populations because they now have less predators. The increase in phytoplankton population then also results in the formation of dead zones as they die and decompose. Oftentimes‚ such as in the Black Sea‚ nutrient runoff and overfishing occur in tandem. Additionally‚ the species composition of the ecosystem will change‚ with the growth of “highly tolerant gelatinous organisms such as Noctiluca (responsible for nighttime phosphorescence)” often increasing. Species
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Claudia Valdez Anthropology 1 M&W Coral Reef Destruction They can be found in all three of the Earth’s oceans‚ scattered throughout 109 countries. Ancient natural masterpieces formed by a variety of delicate lime secreting coral polyps. The oldest discovered reef was formed over 500 million years ago‚ which makes it one of the oldest ecosystems to exist. Little is known about the lifespan of coral colonies but they have been known to last
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Zinc‚ copper‚ and lead are three of the most common heavy metals released from road travel‚ accounting for at least 90 of the total metals in road runoff. Lead concentrations‚ however‚ consistently have been decreasing since leaded gasoline was discontinued. Smaller amounts of many other metals‚ such as nickel and cadmium‚ are also found in road runoff and exhaust. About half of the zinc and copper contribution to the environment from urbanization is from automobiles. Brakes release copper‚ while
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