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3.) The oxygen cycle is a biological process which helps in maintaining the oxygen level by moving through three main spheres of the earth which are: Atmosphere. Lithosphere. The oxygen that trees produce contributes greatly to the atmospheric oxygen that we breathe in. However, when humans cut down large areas of trees, we decrease oxygen production in that area as a result.

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2.)Nitrogen is an essential nutritional element for all plants and animals. There is a large reservoir of nitrogen in the air, but in a chemical form that is unavailable to plants. Therefore, it needs to be "fixed" into usable form as nitrates or nitrites by soil microorganisms. If there is excess nitrogen can cause over stimulation of growth of aquatic plants and algae. Excessive growth of these organisms, in turn, can clog water intakes, use up dissolved oxygen as they decompose, and block light to deeper waters.

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1.) It's a mechanism for the rivers' role in the global carbon cycle – it's the food for the river breath.” The Amazon alone discharges about one-fifth of the world's freshwater and plays a large role in global processes, but it also serves as a test bed for natural river ecosystems. Humans affect the carbon cycle by burning fuels everyday and they add carbon into the atmosphere everyday.

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most plants in the amazon river have adapted to excessive rainfall by having leaves that a "drip tip" that allows raindrops to roll off quickly. Animals also have adaptations like camouflage and mimicry

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biodiversity is important in my biome because it is needed to keep the environment stable.There is a slight problem with biodiversity due to some population decreases and species going extinct.The rainforest is a biodiversity hotspot containing over 1000 different animal species. The governments are trying to prevent a biodiversity decline by fining people for hunting animals in the rainforest.

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the golden lion tamarin is an endangered animal found in the amazon. It is endangered due to  severe habitat loss and fragmentation. Efforts in place to stop extinction are less sugar cane production and the government marking off an area that is known to be their territory.

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the Salmo gairdneri is an indicator species in the amazon and its important because it shows the quality of water treatment in sewage plants.

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The giant cane toad is a large frog species. The problem is It has skin that secretes a fluid so potent that it can kill many animals around it. The cane toad is known to come from south/ central america but is still invasive to the area

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the scarlet macaw is a large bird native to south/ central america. The scarlet macaw can grow up to 2.6 – 3.2 ft. Their avarage lifespan is 40-50 years in the wild but they can live up to 70 years.

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the poison dart frog is apart of a frog species native to south america and contain enough poison to kill 20,00 mice or 10 grown men.

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The brazil nut tree is a keystone species in the amazon. This tree is one of the most commonly grown trees and provides food to agouti which takes its nuts and spreads the seeds which promotes plant growth. Without this tree the agouti population would drop due to the lack of food and the tree population would also decrease due to the agouti being gone and not being there to spread the seeds.

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this rodent is a keystone species because When an agouti chews through a seed pod and releases its seeds, and spreads them to promote plant growth. Without the agouti plant growth would decline drastically and the animals that depend on that plant would die off because of starvation.

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the river is the important aqautic ecosystem within my biome. Some physical features like width and depth are important. The width is avg. 2 - 6 miles dry season; up to 30 miles wet season. As the width expands it gives the animals more space to wonder around and mate with other animals. The depth of the amazon river is about 66 - 330 ft. this is important to the water animals because it gives them more hunting and mating space.

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the biome i choose is the amazon river. Typical plants for this biome is Myrtles, laurels, bignonias, figs, Spanish cedars, mahogany, and rosewoods. Animals found in the amazon river are anacondas, arapaima gigas, and the golden lion tamarin. The amazon river is located at Latitude: 3° 17′ 58″ South. Longitude: 60° 39′ 52″ West.