1. FRESH WATER BIODIVERSITY CONSERVATION BY FARIHA MUNIR AND SHEHZADI MAHA AND GROUP

2. FRESH WATER ECOSYSTEM A pond is a body of standing water, either natural or man-made, that is usually smaller than a Lake. Usually they contain shallow water with marsh and aquatic plants and animals. A few animals also make ponds, including both alligators and beavers.

3. Fresh water ecosystem The type of life in a pond is generally determined by a combination of factors including water level and nutrient levels, but other factors may also be important, including presence or absence of shading by trees, presence or absence of streams, effects of grazing animals, and Human activites.

4. CHARACHTERISTICS OF FRESH WATER(Pond) One of the most important features of ponds is the presence of standing water, which provides habitat for wetland plants and animals. Familiar examples might include water-lilies, frogs and turtles. A large number of invertebrates then feed on the decaying plants, and these invertebrates provide food for wetland species including fish, dragonflies and herons. The open water may allow algae to grow, and these algae may support yet another food web that includes aquatic insects.

5. Animals and Plants in Pond

6. Life in Pond ponds often have a large number of different animal species using the wide array of food sources. They therefore provide an important source of biological diversity. Ponds, being small, are easily disrupted by human activities.

7. Threats To Pond Biodiversity Drainage of ponds is a frequent problem in agricultural areas. Although ponds are a useful source of water for cattle, overgrazing can turn a pond into a muddy hole. Nutrient sources such as pastures, human sewage, and even lawn fertilizer can cause explosive growth of algae, and the loss of rooted plants and many other aquatic species. Roads near ponds can kill large numbers of amphibians and turtles.

8. A Contaminated Pond

9. Contaminated Pond of our College

10. Finding out solution of the problem After this literature review we observed a pond in or back side of our own college which was highly contaminated. We observed it and saw that there were very few species left in the pond and their was great imbalance their. We thought of finding out a practical solution to restore this imbalance.

11. Finding The solution We went to net and searched all the problems which cause this contamination and also searched possible way to clean up that pond Surprisingly we found a very cheap and easy way to clean the pond water.

12. Possible solution in our view After literature review we started the experiment with the hope that it it would go successful We collected some water from that contaminated pond. We took tomatoes and peeled them. We washed tomato peels with water.

13. Contaminated Pond Water

14. Experiment in Process Tomato peels were taken out from water after few minutes and placed them in beaker containing pond Water and kept it in sunlight for few days. Sample is still under process with the hope that it would get cleared.

15. Putting Tomato Peels In contaminated water

16. Tomato peels in Water

17. Comparision between contaminated pond water and purified water eith placement of tomato peels