2. Energy Flow in Ecosystems Gaiser Life Science

3. Know What are the sources of energy in an ecosystem? Evidence Page # I dont know anything. is not an acceptable answer. Use complete sentences. After listening to the PowerPoint lecture, come back here and list evidence to explain why your answer to the above question is or is not a good answer. You may also use other outside sources to help you respond. Use a web site or a book - Find/draw a food web showing all levels of energy transfer. Use an animal with which you are already familiar.

4. Clarifying ?s Information Page # Energy Flow in Ecosystems Energy rolesHow organisms get energy or give it to others producer - makes own foodSource of all energy in ecosystems Example: algae and plants - gets energy by eating other organisms - eats only plantsExamples: deer, mice, rabbits - eats only animals consumer Examples: lions, tigers, snakes Summary: - eats both plants and animalsExamples: bears, humans, crows - breaks down dead organisms and wasteExamples: bacteria, fungi herbivore carnivore omnivore decomposer - transferring energy among organisms Example: algae bugs fish bear food chain - overlapping complex transfer of energy among organisms Examples: snake hawk ( points to who eats it) frog mouse grass fungi food web - shows energy being transferred between levelsenergy pyramid Producers - most energy available Consumers - least energy available Only 10% of energy transferred to next level How much energy is transferred? Tertiary (3) hawk 1Kcal Secondary (2) rodent 10Kcal Primary (1) bugs 100Kcal Producers (P) plants 1000Kcal K = kilo-calories

6. Clarifying ?s Information Page # Summary: Energy Flow in Ecosystems Energy rolesHow organisms get energy or give it to others producer - makes own foodSource of all energy in ecosystems Example: algae and plants - gets energy by eating other organisms - eats only plantsExamples: deer, mice, rabbits - eats only animals consumer Examples: lion, tiger, snakes - eats both plants and animalsExamples: bear, human, crow - breaks down dead organisms and wasteExamples: bacteria, fungi herbivore carnivore omnivore decomposer - transferring energy among organisms Example: algae bugs fish bear food chain - overlapping complex transfer of energy among organisms Examples: snake hawk ( points to who eats it) frog mouse grass fungi food web - shows energy being transferred between levelsenergy pyramid Producers - most energy available Consumers - least energy available Only 10% of energy transferred to next level How much energy is transferred? Tertiary (3) hawk 1Kcal Secondary (2) rodent 10Kcal Primary (1) bugs 100Kcal Producers (P) plants 1000Kcal K = kilo-calories

7. This PowerPoint was created by Tim Paterek from Charlene Sheas lecture notes. All pictures came from Google Image Search. To fall within the Fair Use Guidelines, this PowerPoint must be used within the confines of the classroom and may not be published back onto the Internet unless the pictures are removed.