Ecology & Environment

Chapter 2

VocabularyScavenger

Decomposer

Food chain

Food web

Energy pyramid

What are the energy roles in an ecosystem?

• Organisms in an ecosystem are either:– Producer– Consumer– Decomposer

Producers

• Organisms that makes its own food• Source of all food in an ecosystem• Plants, algae, bacteria photosynthesis

Consumers

• Obtains energy by eating other organismsHerbivores = only eat plantsCarnivores = only eat animalsOmnivores = eat plants and animalsScavenger = feeds on dead organisms

Consumers – Which is which?

Label each picture as a herbivore, carnivore, omnivore or scavenger

Decomposers

• Break down biotic wastes and dead organisms• They return raw materials back to the

ecosystem

• They recycle energy!• Mushrooms, bacteria, mold

Pair Share Review

• Write one sentence with your pair share partner; finish this sentence:

The sun is the main source of energy for producers, consumers and decomposers because ________________________________ _____________________________________________________________________________________________________________________.

How does energy move through an ecosystem?

• Energy moves through an ecosystem when one organisms eats another!

Food Chains

• Series of events where one organisms eats another.

Lake Algae -> Bass Fish -> Eagle

• Put an example of a food chain in your notes. Connect grass to you!

Food Webs• Food chain shows one

path of energy• Food web shows all

the possible paths energy can move

*Virtual lab tomorrow!

Energy Pyramids

• Diagram that shows how energy moves from lower to higher levels

*the most energy is available at the producer level of the pyramid, as energy moves up the pyramid less energy is available

Pair Share Review

• With your pair share partner, complete the Energy Flow in Ecosystems worksheet.

• 10 minutes!• Will correct when finished!!• No copying! Work together!!

Vocabulary

Biome

Climate

Desert

Vocabulary

Rainforest

Emergent layer

Canopy

Understory

Vocabulary

Grassland

Savanna

Deciduous tree

What are the six major biomes?

Biome – group of ecosystems with similar climates and organisms

1. Desert2. Rainforest3. Grassland4. Deciduous forest5. Boreal forest6. Tundra

Climate

Climate = average temp & amount of precipitation

*Climate determines a biome by limiting the type of plants that can grow

1. Desert Biomes

2. Rain Forest Biomes

3. Grassland Biomes

Prepwork

• Pages 63-66 due tomorrow!

4. Deciduous Forest Biomes

5. Boreal Forest Biomes

6. Tundra Biomes