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Gnarls Barkley

on 11 December 2012

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River and Stream Biome By: Julieta Munoz Rivers and Streams Facts Locations Consumers Rivers and Streams Producers Rivers and Streams are places where water is moved from one place to another. A river or stream starts from headwaters, which may be springs, melting snow, or even lakes, and then travel all the way to mouths, usually another water channel or the ocean.They are important,because they serve as a life-giving source to many plants and animals. Rivers and streams make up about 3% of the earth's total water that is fresh. At the headwaters it is cool,the water is clear, and there is high oxygen levels. In the middle of the river and streams the width increases and species diversity increases as well. When ever there is a bend the speed of the water changes. Water on the outside of a bend flows faster than the water on the inside of a bend. At the mouth, the water becomes murky from all the sediments that it has picked up upstream, decreasing the amount of light that can penetrate through the water. Since there is less light there is lower oxygen levels. Rivers and streams are different temperatures depending on their size. The bigger the river the colder it is. The smaller the river the easier it is to get sunlight and the warmer it is. Rivers are located all over the world. The largest one is the Nile River at the length of 4,160 miles in Africa. The second largest river is the Amazon River 4,000 miles in South America. Yangtze 3,900 miles in Asia is the third largest river. The Mississippi River in at 3,870 miles in the U.S.A. There are many more rivers in Russia like the Ob and Yenisei River. There are rivers in every continent. Numerous aquatic green plants and algae can be found towards the middle part of the river or stream. Some aquatic plants have powerful roots that keep them anchored to the bottom of the river, while others have stems that bend easily with the movement of the water. Plants that live in rivers mainly grow near the surface of the water or in shallow water to get sunlight. Certain mosses are able to cling to rocks. Plants in rivers and streams serve as a home for animals or food. Types of plants you would find in a river or stream are the pickerel weed, water hyacinth, arrowhead, water-milfoil, coontail, and water chestnut. The platypus has webbed feet and fur that ables it to swim with ease and warmth.
Platypuses lives in Australia and is not native to anywhere else. Trouts live near the headwaters of rivers and streams.They have streamlined bodies that let them swim against strong currents.
Alligators and crocodiles have powerful tails to propel themselves through the water. Alligators live in the United States and China, while crocodiles live in Africa, India, Southeast Asia, and Australia, and parts of North, Central and South America.
Fish that require less oxygen, such as catfish and carp, can be found. At the end of a river the water is murky and has does not have that much oxygen. Fish that require less oxygen, like catfish and carp, can be found there. http://www.ucmp.berkeley.edu/exhibits/biomes/freshwater.php







Science Explorer Grade 7 (our science textbook) Sources Ponds and Lakes Both freshwater
have similar animals
have similar plants
could be connected to each other running water
long stretches of land bordering their sides
connected to seas or oceans still water
enclosed by land
not connected to the seas or oceans From:http://www.enchantedlearning.com/geography/rivers/ Threats Rivers and streams are threaten by mainly humans. We build dams all over the world in rivers that harm the environment. When a dam is built, a lake is made behind the dam. Dams can be viewed as good and bad. Dams may provide pollution-free energy, and create lakes for people to enjoy, but they can also damage the environment. Salmon are a species that use rivers to spawn, and are often hurt by dams. We are also a threat, because when we liter, fertilize the lawn with chemicals, and allow our cars to drip nasty oils and fluids we are polluting freshwater biomes. The rain carries these pollutants down storm drains into rivers, streams, lakes and ponds. Little or big changes to rivers can wipe all life in a river or put them in danger. Rivers and streams would carry these pollutants to bigger rivers or an ocean which could lead to more pollution problems. http://www.factzoo.com/mammals/platypus-duck-bill.html animals.nationalgeographic.com
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