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In this lab exercise, the whole class created a food web. Each person was given an organism to find its energy source. Also, each of us had to find if the organism is itself a source of energy for other organism(s). After a discussion with each classmate, the food web was created.
The food web can be divided roughly into five main sections. The first section is the nutrients found in the soil, such as, phosphorus, and dead oak tree leaves. The second section is fungal hyphae, tree roots, and bacteria. The third section is nematodes, and earthworms. The fourth section is insects, such as, mites, wolf spiders, beetle larvae, and entomobryomorphan collembolan. The top part of the foodweb is the bird, robin. Generally speaking, the first section is the food source for the second section. The section is the food source for the third section. The third section is the food …show more content…
Insects are a big part of birds’ energy source, if somehow the organisms of this food web die, the birds who only consume insects will not survive or might have to disperse and/or migrate to other areas. Also, if this food web’s organisms are near water, some organisms from this food web might be the energy source for some of the species that live in water. Any changes in this food we will also affect the organism living in the nearby water.
The solar radiation and water could be the ultimate source of energy for this food web. Dead oak tree leaves need water for decomposition of the leaves. Also, solar radiation is needed for the oak tree roots, which is an important part of the food web.
If the robin goextinct, there will be too many spiders. The energy source for spiders is earthworms and oribatid mites. High population of spiders might eat all earthworms and oribatid mites. Lack of earthworms and oribatid mites will imbalance the food web, because earthworms and oribatid mites are the energy source for other organisms on the food

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