Ecology Ch.5

Question 1

Habitats and
tolerance

Answer 1

-climate and other factors determine where an organism lives
-ideal range of environmental conditions for species to survive

Question 2

Niche (nee-shh)

Answer 2

An organisms role in an ecosystem (what it does and how it interacts with the biotic and abiotic factors)

Question 3

Competitive exclusion
What happens if 2 species occupy the same niche

Answer 3

No 2 species can occupy the name niche at the same time.
-if they do, competition (fight for resources) will occur

Question 4

Symbiosis -interaction between species

Answer 4

Predation- + (predators) -( prey)
Parasitism- +( parasite) -( host)
Mutulism- +for both
Commendalism- +for 1 neither for one

Question 5

Keystone species

Answer 5

One that can have a dramatic impact on a community

Question 6

Aposematic coloration

Answer 6

Are warning colors;
Skunks, snakes,wasps; “dark volors” contrast with “light colors”

Question 7

What is mimicry?
The 2 types of mimicry

Answer 7

Mimicry-copying another organism
Mullerian Mimicry - several toxic organisms copy each other; wasps bees

Batesian mimicy- nontoxic copying toxic

Question 8

What is a Succession?
What is a primary Succession?

Answer 8

• is when a major event wipes out a community
• went it wipes out a community and no soil remains

Question 9

What is a secondary Succession?

Answer 9

Is when the community is damaged,but soil remains usuable( fire, flood, human activity etc)

Question 10

What is a pioneer species?
2 examples

Answer 10

The first organism to colonize the area lichen and moss

Question 11

Population density
Formula
And what does it depend on

Answer 11

individuals/ area

Depends on :
-availability of food/space
- weather conditions
-breeding patterns

Question 12

Population distribution
What are the 3 types?

Answer 12

How the individual of a population are spread out in an area
Random
Clumped
Uniform

Question 13

Population size (factors that affect the size)

Answer 13

-# births
-#deaths
-immigration
-emigration

Question 14

Logistic growth

Answer 14

Real population shows this of growth (more s shaped curve) due to limited factors

Question 15

Limiting factors

Answer 15

Density dependent
- strongly impact larger population
- competition
- predation
-parasitism/ disease
- food supply
Density Independent
- population size doesn’t matter
- rain fall
- weather events ( hurricanes,fire etc)