Nicole+Ellie+Jacob

biotic factor Platte River Ecosystem
 * One example of biotic factor is bird eating off an alligator.
 * Another example remoras eating off of sharks.
 * For a third example of biotic factor is dolphins using sound waves to comunicate.
 * Grass is one organism in the ecosystem. Their niche is that the supply the energy to the ecosystem. Their trophic level is 1.
 * Blue Gill is another oganism in the ecosystem. Their niche is to provide exta food for the ecosystem. Their trophic level is 2.
 * Snapping turtles is another organism in the ecosystem at the Platte River. Their niche is to maintain the amount of fish in the river.

producer 1

producer 1

producer 1

herbivores trophic level 2 herbivores trophic level 2

carnivores trophic level 3 omnivores trophic level 4

**(with Teasa) Biotic Relationships Assignment:** Mutalism: termites and wood - Termites intestines are home to protozoans that digest the cellulose of which wood is composed. Moths and yucca plant - Moth transfers pollen form one flower to the other and the moths have a source of food when their eggs hatch

Commensalism: Shark and a remora - attaches itself to the shark and gets leftovers from the shark's meal. Orchids and trees - orchids grow up in the trees because they need more light and there is so much humidity, their roots absorb the water in the air.



Paratisim: Tick and a dog - the tick is getting nutrition while the dog is getting harmed and is losing blood. Mosquito and human - same..

Pesticies: (Nicole Warrington)

A pest is any animal or plant which has a harmful effect on humans, their food or their living conditions. A pesticide is a chemical posion that is used to kill an unwanted organism.

One benefit of a pesticide is that it actually kills the pest that is bringing diseases. Another benefit is that it kills other animals that eat fruit