2Do NowRespond to the following question in your lab notebook:
3Lesson TargetI can create a food web that shows the transfer of chemical energy within an ecosystem, and I understand that not all energy makes it to the next level.
4VocabularyFood chain- a linear representation of how food is transferred from one organism to another.Food web- A web that shows all of the feeding relationships within an ecosystem.Trophic Level- feeding levels within an ecosystem- the producers are in the first trophic level.
5VocabularyLaw of Conservation of Energy- Energy cannot be lost because it cannot created or destroyed.Calories- a measure of the amount of energy stored in food.
6Every organism, dead or alive is a potential source of food for other organisms
7Food ChainUsed to show how energy is transferred, via food, from producers to primary consumers, from primary to secondary consumers, and so on
16Third and Fourth Trophic Levels Secondary and tertiary consumers [carnivores and omnivores]
17Whenever one organism eats another, chemical energy is transferred to a higher trophic level Some energy is not used by the consumer; some is transformed into heat, some remains in the food not eaten The amount of energy stored in food is measured in CALORIES
19Procedure 1; page 21Draw a Food Web, showing energy transfer among: Trout Gulls Humans Catfish Minnows Bacteria Insects Phytoplankton Herbivorous zooplankton Carnivorous zooplankton
20H/W Questions p22; 1 - 41. Rank the organisms in your Food Web from most abundant in the ecosystem to least abundant in the ecosystem. Explain how you determined your rankings.
21H/W Questions p22; 1 - 42. When 1 organism eats another, not all of the energy stored in the food gets transferred to the consumer. What happens to the energy that is “lost” during each transfer?
22H/W Questions p22; 1 - 43. In 1 m3 of a typical open ocean ecosystem, phytoplankton can generate 1,600,000 Calories of chemical energy per year. Assume there is an 80% “loss” of usable energy during transfers from one trophic level to another. Make a Data Table AND Graph showing energy available at each of the first 5 Trophic Levels.
23Available Energy [Calories] TITLE?Trophic LevelAvailable Energy [Calories]1st1,600,0002nd3rd4th5th