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To compare two or more fresh water ecosysterms at the wetlands center.

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Introduction

Biology course work 1: Populations in freshwater Ecosystems Aim: To compare two or more fresh water ecosysterms at the wetlands center. In this study I will want to compare two ecosystems. I predict that pollution in the water will be quite minimal because the freshwater habitats are under conservation . Also the other reason being that the people working on the habitats will try to keep it a healthy habitat with a good balance at each trophic level so that the animals will live. Ipredict that the nitrate levels to be quite high in a habitat with other animals such as ducks. The reason being that the excrement will cause the process of eurification and make the levels higher. I also predict that the Oxygen levels will be quite high (about 8 parts per million), because the conservationists may clean out the excrement .For a healthy habitat the abiotic factors are: * The light level must be good so that- plants can photosynthesize and don't decompose and cause the microbes to use the oxygen. * Temperature is important so that- if the water is too cold the anmals will die and decay and the same if it is too warm. * Flow rate of the water is important so that- the habitat isn't destroyed by the fast water flow. ...read more.

Middle

Animal What depth found in Number pr sample (A4 paper size tray) estimate Flat worm T 1 Water mite T 1 Cyclops T,B T= 50 B=40 Water snail M M= 1 Water flea M,B M= 20 B= 10 Here is a food web for fresh water habitats: Daphnia flat worm Planarians have extraordinary powers of regeneration and they normally reproduce by pulling in two. The fragments then regenerate their missing parts. water mite Water Mites have a globular, sack-like body and are related to spiders. They have eight legs and a line that separates their thorax from their abdomen. Some water mites are parasitic and suck off the gills of fresh water clams and mussels. Some water mites have special hairs on their legs that help them swim. Cyclops is a genus of copepods named for the animal's single eyespot, reminiscent of the one-eyed monster in Greek mythology. Although most species of Cyclops are marine, many are commonly found in quiet freshwater habitats. Common Name: Fresh Water Snail or Planorbis Scientific Name: Planorbis leavis Taxonomy: Animalia Mollusca Gastropoda Pulmonata aquatica Planorbidae Physical Description: This snail appears like a smaller and darker colored version of the garden snail. They have a spiral shell that is almost spherical and a body that is the same color as raw liver. ...read more.

Conclusion

Occasionally, they enter the home where dampness occurs such as in basements, cellars, bathrooms, and kitchens, especially near drains, leaking water pipes, sinks, and in the soil of over-watered house plants. They usually appear in the spring and early summer but can be found all year round. Some are known as "snow fleas," appearing on the top of snow during late winter and early spring. These very small, leaping insects do not bite humans, spread disease, nor damage household furnishings. They are usually a nuisance by their presence. Springtails are minute, wingless insects about 1/16 to 1/8 inch (1 to 2 mm) long. Colors vary from white, gray, yellow, orange, metallic green, lavender to red with some being patterned or mottled. They get their name from the ability to catapult themselves (leap) through the air three to four inches by means of a taillike mechanism (furcula) tucked under the abdomen. When disturbed, this appendage functions as a spring, propelling them into the air away from the danger source. Young resemble adults except for size and color. Eggs are spherical. Because both habitats are in conservaton and filtered the nitrate level is 0. The health of the pond is not normally that good in the city due to the pollution given off by cars and so on. For more accurate readings of the animals I could have calculated the sizes more accuraltely. This could have an effect on my results. ...read more.

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