 What rights did the fictional plants and animals declare?  Why should these “rights” be granted?  Why can’t the plants and animals have freedom from humanity?

 What rights did the fictional plants and animals declare? Life, habitat, good soil, clean air, pure water  Why should these “rights” be granted? All living things need adequate resources to grow and reproduce  Why can’t the plants and animals have freedom from humanity? All living things need other living things to survive

S7L4a. Demonstrate in a food web that matter is transferred from one organism to another and can recycle between organisms and their environment. S7L4c. Recognize that changes in environmental conditions can affect the survival of both individuals and entire species. S7L4d. Categorize relationships between organisms that are competitive or mutually beneficial.

Two or more things that depend on each other

Organisms can change over time Organisms adapt to their environment What happens if an organism does not adapt? If organisms do not adapt, then the organism or population can die out (become extinct)

As the prey decreases, there is less food for the predator, so they die off. The fewer predators, the easier it is for the prey to reproduce, so their population shoots up. As more food is available, the predator population jumps, until they begin over eating their food supply and the prey decreases, beginning the cycle again. Sunny Meadows Animation

Natural events such as earthquakes, fires, storms, and drought Competition among organisms Human factors: –Pollution –Land development for roads, industries, homes –Introduction of New Species

With a partner, look at the images on the next few slides and identify ways in which these natural or man-made events affect ecosystems.

Kudzo It’ll Grow on You!

Activities for Conditions that Affect Populations [see resources]

The robin may also have to compete with the flicker bird to get the caterpillar A robin in a meadow finds a caterpillar and swallows it. This is one obvious way organisms in an ecosystem interact

Ants work together to build a nest, collect food, and defend the colony

1. Mutualism 2. Mutualism 3. Commensalism 4. Parasitism 5. Commensalism 6. Mutualism 7. Commensalism 8. Parasitism

o Study Jams: Symbiosis Study Jams: Symbiosis o Basic Symbiosis Video: qbs qbs o Symbiosis Songs [select one]: o o U#t=84 U#t=84