DO NOW:1. Find yourself on the MAP schedule.2. Do the expert questions packet

When a question says to “draw” a food web or food chain

It means this…..

Acorn mice tick

It doesn’t mean this….

How do abiotic factors affect an ecosystem? Give 2 examples!

• Temperature- affects which animals can live in an ecosystem. Not all animals can survive at certain temperatures.

• Water- and its abundance or absence affects whether certain plants can grow easily and the available supply for other organisms.

• Soil – provides nutrients for producers

Complete the chartProducer Consumer

HerbivoreConsumer Carnivore

ConsumerOmnivore

Decomposer

Def. Using sunlight to make own food

Eats producers

Animal eater

Eats a variety of meats and vegetables

Gets energy by breaking down dead organisms

Ex. Fern, tree, shrubs

Rabbit, guinea pig

Dog, lion humans Bacteria, fungi, algae

Explain the importance of decomposers in an ecosystem

• Decomposers remove energy from dead organisms and produce materials that can be used by producers. They are natures recyclers

Describe how producers, consumers and decomposers are linked in a food chain

• Consumers feed on producers and other consumers. Decomposers feed on producers and other consumers after they are dead.

Describe how energy flows though a food web

• Energy flows from producers to consumers to decomposers.

• More energy is available to producers than to consumers

Draw 2 food chains and illustrate how they link together to form a food web

2 food chains:

Grass rabbit snake owl decomposers

Flowers rabbit owl decomposers

Food web:

grass

flowersrabbit

snake

owldecomposers

Explain the relationship between carrying capacity and limiting factors

• Carrying capacity is the maximum number of individuals of a species that can live in an environment.

• Limiting factors are resources that affect the numbers of a given population.

• Limiting factors affect the carrying

capacity because when a population grows larger than its carrying capacity, limiting factors in the environment (like water supply, disease, etc) will cause individuals to die off or leave. Then the population will decrease and return to the carrying capacity.

Compare co evolution with symbiosis• Co evolution happens when a symbiotic relationship

occurs over a very long period of time and changes the structure or behavior of the organisms involved in the relationship. The change happens for a positive reason and helps both of the organisms.

• Symbiosis is a relationship between two organisms but does not necessarily cause a change in the organisms.

Complete the chartSymbiotic

RelationshipDefinition Example

Mutualism

+ +

Relationship when both member of the relationship benefit

African Crocodile (+) & Plover (+)

Commensalism

+ 0

Relationship when one member of the relationship benefits and the other one is unaffected (does not care)

Shark (0) & Remora (+)

Parasitism

+ -

Relationship where one of the members benefits and the other is harmed

Tic (+) & mammal (-)