Monday, May 14, 2012

Food web


In my park there are animals running around and what they do most is scavenge and eat for most of the day. Many of these animals are the bottom of the food chain, but they are major consumers like the squirrels and robins. Every once in a while I will see a red tailed hawk flying around and this Hawk will eat the squirrels and might possibly kill a robin as well.

One big thing that mean and Austin found was woodpecker holes. Earlier this season I heard a woodpecker at a tree for about a half hour as I walked around the woods. This woodpecker was going after grubs and ants inside the tree. It is also very possible this woodpecker was using this "drumming" to show boundaries and to attract a mate. A hawk would eat this woodpecker and the woodpecker eats the grubs and ants which eat parts of the tree and the sap. The ants also eat dead animals and are part of the decomposition of the forest. The hawk would also eat the field mouse I found some footprints in the sand from. The mouse would then eat the plants that would take in energy from the sun and water to grow. 




Deer                                                             Deer                                                          Coyote

Also I found some deer prints and some coyote prints in the sand. A deer is a consumer while a coyote is a predator. The deer will eat plants and berries. The coyote will eat the consumers lower than it on its food chain. For example rabbits, mice, and squirrels. Also in a large group a coyote will hunt deer and kill them.

Each time you go down the food chain the organism that killed the other to gain energy only gets 10% of the energy from that organism.
For example if a coyote kills a rabbit it absorbs the energy from the rabbit, but not from the abundance of vegetation it had to eat before hand to get to the size it is. So if the rabbit ate 1000 calories to get where it was when it died the coyote would only get 100.




http://images.nationalgeographic.com/wpf/media-live/photos/000/006/cache/red-tailed-hawk_681_600x450.jpg
http://farm4.static.flickr.com/3002/2317420176_8635d628be.jpg
http://farm2.static.flickr.com/1435/601852746_33b57d301f.jpg
http://pelotes.jea.com/pilpeck1.jpg

4 comments:

  1. I like how you use the diagrams to show what eat what and how much energy it gains.

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  2. I agree with austin, it makes it look very professional and well done:)

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  3. I found it very interesting about how animals only get 10% the energy from the animal they eat. I never knew that.

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  4. I agree with Katie. I thought that when a mouse ate a plant and a hawk ate that mouse, the hawk would get the energy from the plant as well as the mouse.

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