Ecosystem Structure

What is an ecosystem?

Do you remember?

Ecosystem

A. unit that includes all the interacting parts of an environment in an area

a. Abiotic

(Nonliving)

b. Biotic

(Living)

Biotic or Abiotic?

Bacteria

Biotic

Bacteria

Biotic or Abiotic?

The Sun

Abiotic

The Sun

Biotic or Abiotic?

Leather Seats

Biotic

Leather Seats

Biotic or Abiotic?

Dead Dog

Biotic

Dead Dog

Biotic or Abiotic?

Temperature

Abiotic

Temperature

Biotic or Abiotic?

Tire

Biotic

Tire

Ecosystem

Structure

Sun’s energy>photosynthesis>glucose

A. Energy flows when organisms eat

B. Autotroph = make their own food from chemicals and light

C. Heterotroph = must obtain food; can’t make it

Mini - Structure

D. Niche= way of life; physical space and role; “profession”

E. Habitat = place where organisms live; “address”

Who’s Niche is this

Gathering acorns?

Who’s habitat is this?

Trophic Levels

(feeding levels)

A. Producers = autotrophs that make their own food

B. Consumers = heterotrophs that eat other plants and animals

C. Decomposers = break down dead tissue and waste

a. Herbivore = eat plants

b. Omnivore = eat flesh and plants

c. Carnivore = eat flesh

d. Scavenger = feed on organisms that recently died

Consumers

First level consumers feed on producers (Herbivores)The zebra eats the grass

Second level consumers eat the first level consumers (Carnivores)

The lion eats the zebra*Omnivores can be first level or second level

consumersTertiary consumers eat the second level consumers

The vulture eats the lion

Which of these are producers?

Which of these are first level consumers?

What is another name for first level consumers?

Herbivore

Which of these are second level consumers?

What is another name for a second level

consumer?

Carnivore

Food Chain = specific order in which organisms obtain energy in an ecosystem

Food Web = complex interconnected food chains

Food chain

Food Web

Make a food chain

DaisyEagle

Grasshopper

Frog

Coyote

Answer:

---> ---> ----> ---->

Notice the direction of the arrows. This shows the flow of energy

Food Web

Make a food web

Bear

Ladybug

Fungi

Mountain Goat

Oak Tree

Barn owl

Sparrow

Deer

Fox

GrassSpider

In a marine ecosystem, disease killed most of the sea otters. This allowed the sea urchins and clams to increase in number. As a result, the sea gull population increased and the seaweed population decreased. Identify a secondary consumer in this marine ecosystem. A. Seaweed B. Clam C. Sea urchin D. Sea gull

Sea Gulls

Sea Urchins

Clams

Seaweed

Sea Otters

Use the description below to answer the following question.

In a marine ecosystem, disease killed most of the sea otters. This allowed the sea urchins and clams to increase in number. As a result, the sea gull population increased and the seaweed population decreased. Identify a secondary consumer in this marine ecosystem. A. Seaweed B. Clam C. Sea urchin D. Sea gull

Sea Gulls

Sea Urchins

Clams

Seaweed

Sea Otters

Use the description below to answer the following question.

What abiotic factor is the initial energy source in most food webs?A. ProducersB. RainC. BacteriaD. Sun

What abiotic factor is the initial energy source in most food webs?A. ProducersB. RainC. BacteriaD. Sun