3 Oct Is this an alligator or

a crocodile? Agenda

New Seats Food Chains and webs

Homework Have a great

weekend!

Do any of these vocab. terms look familiar?

Autotroph Heterotroph Trophic Level Producer Consumer Decomposer Herbivore Carnivore Omnivore

Organism Population Community Food Chain Food Web Food Pyramid Limiting factor

How well do you remember the levels

of organization?

-all organisms of the same species living within an area

Populations

Communitypopulations of different species that live in the same area

Feeding relationships

Community

Ecosystem- communities + abiotic factors

Living (Biotic) factors all plants & animals living in an

area Physical (Abiotic) factors

soil, rock, temperature, moisture, sunlight

biosphere

Ecosystem inputs (td2)

energy flowsthrough

nutrients cycle

Energy flows through ecosystems (Td1)

sun

producers (plants, alga, some

bacteria)producers (plants, alga, some

bacteria)

loss of energy

loss of energy

secondary consumers(carnivores)

secondary consumers(carnivores)

primary consumers(herbivores)

primary consumers(herbivores)

Food Chains and Webs

Food chains

Trophic levels feeding relationships start with energy

from the sun captured by producers

all levels connect to decomposers

Fungi

Level 4

Level 3

Level 2

Level 1

Decomposers

Producer

Primary consumer

Secondary consumer

Tertiary consumer

top carnivore

carnivore

herbivore

Bacteria

autotrophs

heterotrophs

Food webs

Food chains are linked together into food webs

Try to follow a food chain through the web

A better representation of a real food web….

North Atlantic Ocean food web

6 OctOpening: Algae beetle larva minnow bluegill pike

Where does all the energy in this food chain come from? What would happen if minnows were taken out of the food chain?

Agenda Ecology notes Efficiency Activity

Homework none

In the following food web, which organisms would most likely be a/an:

producer consumer herbivore carnivore omnivore

A

BC

D

EF

G

HI

Feeding levels

How much energy can you get from food? only the energy that

is stored in the organism

80%-90% energy lost from one level to next

food chain can only have 4 or 5 levels Why?

Inefficiency of energy transfer

Loss of energy between levels of food chain To where is the energy lost? The cost of living!

only this energymoves on to the next level in the food chain

15%growth

50%waste (feces)

35%cellularrespiration

energy lost todaily livingenergy lost todaily living

But what about nutrients?

Energy flows through but nutrients cycle nutrients must be recycled

to be available for the next generation

decomposers return nutrients to the soil after creatures die

fungi bacteria

nutrients

decomposers

Use mathematical representations to support claims for the cycling of matter and flow of energy among organisms in an ecosystem.

C6H12O6 + O2 CO2 + H2O + Energy (ATP or Light)

Show that matter cycles in an ecosystem...

Show that energy flows through an ecosystem…

7 Oct

Opening Agenda

Participation Quiz Practice energy

Problem Biological Control Begin Population

Work

Homework None- Test on

Friday

Participation Quiz1. All the organisms of the

same species living in an area

2. An organism that can make it’s own food

3. An organism that eats only plant material

4. An organism that breaks down dead material to return nutrients to soil

5. An organism that can eat both animal and plant material

A. Decomposer

B. OmnivoreC. PopulationD. CommunityE. ProducerF. CarnivoreG. Herbivore

Practice Energy Problems If a mouse eats 200 calories of grain, how much

of that energy will be available to the cat that eats the mouse? E2=E1 (.15) E2 = 200 (.15) E2= 30 cal

How much of the original 200 cal. Will be available to the coyote that eats the cat? E3= E2 (.15) E3 = 30(.15) E3 = 4.5 cal

If a cat needs 1200 calories a day to survive, how many calories worth of grain would it take to sustain 1 cat? E2 = 1200 1200 = E1(.15) E1= 8000 cal

Strange Days on Planet Earth – Invaders Biological control – (Min 19- Lake Victoria)

8 Oct

Opening

Agenda Populations Limiting factors

Homework Unit 3 (mini)Exam

on Friday

What controls populations?

•Availability of resources

-food, water, territory

•Predation

•Disease

Human Population Growth

http://www.youtube.com/watch?v=VcSX4ytEfcE

8 Oct

Opening

Agenda Population Studies Review

Homework Test Tomorrow