Name:_____________________________________________________
Ms. Marcino
Environmental Science
Note Packet
Chapter 6-Ecosystem Balance (pg 88-107)
1. READ chapter 6 (pgs 88-107) in the text book.
2. Define the Vocabulary:
Chapter 6 Vocabulary
1. Biome:
2. Climax community:
3. Lichen:
4. Parasitism:
5. Primary succession:
6. Secondary succession:
7. Symbiosis:
6.1 RELATIONSHIPS IN THE ECOSYSTEM

All ____________________ interact and a change in the ___________________________ may change a
_________________________ and thus the ____________________________.

Relationships:

_____________________________

_____________________________

_____________________________

_____________________________
PREDATORS AND PREY

Predators:

Example:

Prey:

Example:

The ______________ of both populations ____________________________________________________________________.

Example: snowshoe hare and lynx

Increases in the _________________________________________ increase the ______________________________.


More _______________ (food) can _______________________________________________________________.
A decreases in the ____________________________________________ leads to a __________________________
in the lynx population.
PARASITISM

Parasitism:

Host:

Parasites are __________________________________________________________________________________________________.

Depends on the host _______________________________________________________________________________________.

Examples:
SYMBIOSIS

Symbiosis:

__________________________________-__________________________/____________________________________

Mutualism-___________________________________________________.

__________________________________________-one benefit/______________________________________________.

Commensalism:


Example:
Mutualism:

Examples:
CHECK FOR UNDERSTANDING:
1. What processes link the sizes of predator and prey populations?
2. Why are herbivores not considered to be parasites?
3. How are the 3 types of symbiosis different? How are they similar?
6.2 ECOLOGICAL SUCCESSION

Ecological Succession:

May take __________________________________________________________________________.

Each new community makes it __________________ for the _____________________________________ to
survive.

Two main types:

1. _______________________________________________________

2. _______________________________________________________
PRIMARY SUCCESSION

Primary Succession:


Occurs in __________________________________________________________________________________________.
Steps:
1.
-Lichen:
-Pioneer community:
2.
3.
4.
5.
-Climax community:
SECONDARY SUCCESSION

Secondary succession:

Examples:

Frequently disturbed habitats may _________________________________________________________________


Example:
STEPS:
1.
2.
3.
4.
AQUATIC SUCCESSION

Starts with a _______________________________________ __________________________________________________________

Leads to a ____________________________________________________________________________________________________
ISLAND SUCCESSION

Populations of new __________________________________________________________________________________________ or
to form new species.
CHECK FOR UNDERSTANDING:
1. How does primary succession differ from secondary succession?
2. What is a climax community?
3. Suppose humans put out all the fires in a large area of grassland over a period of 100 years. What would
happen to the grassland community?
6.3 BALANCE IN THE ECOSYSTEM

If ecosystems are not balanced, ____________________________________________________________________.

__________________________________ are normal; they ___________________________________________ in the
ecocsystem.

Chaos Theory

Suggests that ecosystems may be ______________________________________________________________.
6.4 LAND BIOMES

We divide the ecosystems on Earth into ___________________________________________________________.

Biome:

Terrestrial (_____________________) biomes

Type of biome depends on _____________________________________________________________________
_________________________________________________________________________________________.

Aquatic (______________________) biomes

Determined by ________________________________________________________________________________.

8 Major Terrestrial Biomes:

1.

2.

3.

4.

5.

6.

7.

8.