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Energy and Ecosystems Review

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Shannon John

on 31 October 2017

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Transcript of Energy and Ecosystems Review

Food Chains V Food Webs
Create an Energy Pyramid from the Food Web
How is the Living World Organized?
Even Bigger!
Analyze this image and Brain Dump
food chain
: series of events in which one organism eats another and obtains energy
ONE path for energy in an ecosystem

food web
: an interconnected set of many food chains within an ecosystem
multiple paths for energy in an ecosystem
Energy Available
is a larger ecosystem that occupies a specific region determined by climate, vegetation and animals
EX: tundra, rainforest, marine etc...

Every place on Earth that can support life is considered the
Organism --> Population --> Community --> Ecosystem --> Biosphere
: A single living thing that obtains food, water and shelter to live, grow and reproduce in its habitat

: a group of interbreeding organisms, (or a species) living in the same area

: all of the populations in an area

: inlcudes all the biotic (living) and abiotic (non-living) features in an environment
Break it Down
Energy flows through an ecosystem in a complex web of food chains, starting with the sun

sun's energy
is converted into chemical energy through photosynthesis

Organisms eat each other and obtain energy, creating trophic levels
Energy Relationships in an Ecosystem
Put it all Together!
Energy and Ecosystems Review
autotrophs; make food (glucose) using the sun's energy
Producer/Consumer relationship
eat producers; herbivores; omnivores
Predator/Prey relationships
carnivore or omnivore eats primary consumers to obtain energy
carnivores; eat lower level consumers; top of the food chain; apex predators

decomposers break down decaying material and release nutrients into the soil
scavengers are carnivores that feed on dead organisms
Lower levels have larger populations and a higher percentage of available energy in an ecosystem
Higher levels have less organisms and have less energy available
Self Assess: If this ecosystem has 20,000 J of energy available for primary consumers, fill in the rest of the trophic levels
Carrying Capacity
the number of living organisms that a region can support without environmental degradation
Any biotic or abiotic factor in an ecosystem that will limit the population growth of a species
Limiting Factors
OL: I can describe producer/consumer relationships as they occur in food webs by recording notes and interpreting food webs.

What are BIOTIC and ABIOTIC factors?
Fill in the T Chart with biotic and abiotic factors observed in this lake ecosystem.
1. Circle the producers

2. Star primary consumers

3. Box secondary consumers

4. Underline tertiary consumers

5. Identify one food chain

6. What if...
Pyramid Interactive: http://www.mhhe.com/biosci/genbio/virtual_labs/BL_02/BL_02.html
Full transcript