An ecosystem is complex set of relationships among the living resources, habitats, and residents of an area. It is a biological community that incorporates human, animals, plants, soil, water, rocks, and microorganisms living together in a environment. Ecosystem includes both biotic and abiotic factors. Biotic factors include all of the living things such as plants, animals, bacteria, fungi and humans living in an area. The interactions between them such as competition, predation, mutualism and parasitism show that each species in an ecosystem has a direct effect on the other species in the ecosystem. Meanwhile, abiotic factors are the physical and chemical components of an ecosystem such as intensity of light, range of temperature, gases, water and weather. The abiotic factors present in an environment have direct influence on the types of organisms that will be present in an area. For example, Pacific salmon can only exist in an aquatic
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It is an aquatic plant that local to North America and had spread easily and speedily throughout the world. Elodea has branched stems generally with four broad oval-shaped leaves that arranged in whorls around the stem. The suitable temperature and pH for Elodea is from 1°C to 25°C and the pH range is from pH 6.0 to pH 7.5 which is slightly acidic to neutral (Podraza, 2010). The common reproduction of Elodea is through stem fragments which float away, root again, and start new plants (Podraza, 2010). Elodea plant grows better in calm waters that are more than 25 feet deep which commonly in ponds, lakes and slow-moving streams because they cannot persist in fast flowing water. Elodea plays an important role as the producer in food web and provides habitat for many small aquatic animals or eaten by fishes and wildlife. Elodea is an excellent oxygen producer and often used as a hiding place for the fish to protect their
It is an aquatic plant that local to North America and had spread easily and speedily throughout the world. Elodea has branched stems generally with four broad oval-shaped leaves that arranged in whorls around the stem. The suitable temperature and pH for Elodea is from 1°C to 25°C and the pH range is from pH 6.0 to pH 7.5 which is slightly acidic to neutral (Podraza, 2010). The common reproduction of Elodea is through stem fragments which float away, root again, and start new plants (Podraza, 2010). Elodea plant grows better in calm waters that are more than 25 feet deep which commonly in ponds, lakes and slow-moving streams because they cannot persist in fast flowing water. Elodea plays an important role as the producer in food web and provides habitat for many small aquatic animals or eaten by fishes and wildlife. Elodea is an excellent oxygen producer and often used as a hiding place for the fish to protect their