Vocabulary

Organism - any living thing

Adaptation - something that an organism has or does that helps it to live in its habitat

Decomposer - organism that decays or rots plants and animals in place, returning the nutrients to the soil (fungus, mold, bacteria, etc.). For our purposes, also will include "shredders" which aren't truly decomposers but assist the decomposition process (worm, pill bug, millipede, sow bug, some other creepy crawly creatures) See another web page of River Bend's for more on decomposers!

Producer - organism capable of making its own food from sunlight, water, and nutrients and chlorophyll (green plants)

Primary Consumer - organism which gets its food from plants (rabbit, squirrel, deer, mouse, honey bee, aphid, grasshopper, tadpole, duck, black bear (sometimes), mosquito, or humpback whale)

Secondary Consumer - organism which gets its food mainly by eating primary consumers, but can also be prey itself. (weasel, shrew, mole, merganser, snake, spider, frog, most fish, other animals at times).

Top Level Consumer - organism which gets its food mainly by eating other consumers, but rarely becomes prey itself. (hawk, wolf, shark, fox, dragonfly, orca, human).

Carnivore - organism that consumes mainly meat (weasel, wolf, walleye, owl)

Herbivore - organism that consumes mainly plants (deer, rabbits, woodchuck, duck)

Omnivore - organism that consumes both meat and plants (skunk, raccoon, human)

A plant is an organism that is almost always rooted to one place. It makes its own food and it "breathes" in carbon dioxide and "breathes" out oxygen. There are many different groups of plants. Some examples are trees, flowers, or grasses.

An animal is able to move around on by walking, jumping, flying, etc. It gets its food from other living or once-living things. It breathes in oxygen and breathes out carbon dioxide.

Each group of animals have "things" that are different from other groups. We call these "things" characteristics or adaptations. By comparing these characteristics, we can put everything into groups.

Within each group we look for the special habits different animals have. Some of the habits we look at include:

• What does the animal eat?
  • If the animal eats other animals (meat), it is called a carnivore.
  • If the animal eats plants, it is called a herbivore.
  • If the animal eats anything, it is called an omnivore.
• When does the animal eat?
  • If it eats primarily during the day it is called diurnal
  • If it eats primarily during the night it is called nocturnal
  • If it eats primarily at sunrise and sunset it is called crepuscular
• Where does the animal live?
• What are some of the specializations of the the body parts?
• When does the animal have babies and how to they eat?
• What does the animal look like?
  • size
  • color
  • exterior covering i.e. furs, feathers, scales

Just as animals are divided into groups by their different characteristics, so are plants. The special characteristics we look at include:

• When does it replace its leaves?
  • If a plant does lose its leaves, it is called a deciduous plant.
  • If a plant doesn't lose its leaves, it is called a coniferous plant.
• What is the size of the plant?
• When does the plant bloom and release its seed?
• Does it grow a woody stem or a green one?
• Does it have many leaves, stems or flowers on each individual plant, or just one?
• What type of habitat does it prefer?
  • wetlands
  • forest
  • prairie
  • desert
  • oceans
  • mountains

Every type of plant and animal is a critical building block of the nature pyramid. Listed below are the major groups that are important to recognize.

Why do plants and animals "eat?"

All forms of life burn up energy throughout their existence and this energy must be replaced, much like adding wood to a campfire. That energy comes from the food we eat, as well as other nutrients and compounds to replenish those we use up in our activities and lose in our waste.

Green plants, as producers, make their own food out of water, air, sunlight, nutrients, and a special chemical called chlorophyll that plants have and makes them green. They make sugar, which they use up to stay alive and is also passed on to whatever animal eats them.

Producers (green plants) are the only things on Earth that can make their own food. Every other living thing depends on this food, either by directly eating plants or by eating other animals that ate the plants, and so on.

Click here to download a printable PDF version of the image above.

Plants and animals use other plants and animals as food or shelter in order to survive. If a plant or animal suddenly disappeared, other things that needed it to survive might also die. So plants and animals are important to each other. Why are non-living things needed?

Non-living things in the nature pyramid:
A nature pyramid also contains some non-living things that are needed to help the living things survive. Those non-living things are:

• air
• water
• rocks and soil (although most soil has organic material)
• sunlight

• What would happen if there weren't any decomposers?
• Do plants really need animals?
• What would happen if there were more animals than plants?

What do we need to remember when we visit River Bend?

1. The more quiet we are the more we will see
2. Listen to your leader or whomever's turn it is to talk
3. Raise your hand if you have something to say.
4. Do not pick anything unless given permission.
5. Stay with your group and follow your leader's directions.
6. Be respectful of nature - and of each other!

Send us your ideas by email!

• After completing three pyramids at River Bend, create the fourth side to the pyramid, using either an exotic or fictional habitat, to demonstrate each student's understanding.

The following links contain some interesting information food chains/webs and the energy pyramid. Send us your ideas by email!

Watch a Food Chain movie and play a game along the way!
http://s2.brainpop.com/science/ecologyandbehavior/foodchains/preview.weml

Here's a colorful page on food chains
http://www.planetpals.com/foodchain.html

Here's a game that you might be interested in buying-
http://www.cajungames.com/foodchain/