*Unit 10 Part 3: Population/Ecosystem Growth

Question 1

Limiting factors

Answer 1

Environmental factors that limit the size of a population

Question 2

List examples of limiting factors

Answer 2

~Space
~Water
~Predators
~Food

Question 3

Density dependent factors

Answer 3

Limiting factors that depend on how many organisms there are is an area

Question 4

List examples of density dependent factors.

Answer 4

~Food
~Water
~Space
~Predators
~Diseases

Question 5

Density independent factors

Answer 5

Limiting factors that don’t depend of how many organisms there are in an area

Question 6

List examples of density independent factors.

Answer 6

~Drought
~Flooding
~Extreme heat/cold

Question 7

Carrying capacity

Answer 7

The number of organisms that can be supported long term by an ecosystem

Question 8

Natality

Answer 8

Birth rate

Question 9

Mortality

Answer 9

Death rate

Question 10

Immigration

Answer 10

Movement into the population

Question 11

Emigration

Answer 11

Movement out the population

Question 12

What two factors lead to population increase?

Answer 12

~Natality
~Immigration

Question 13

What two factors lead to population decrease?

Answer 13

~Mortality
~Emigration

Question 14

Succession

Answer 14

Change is an environment over time
~Species gradually replace one another

Question 15

Primary succession

Answer 15

~Beginning of a new community where one has not existed
~Starts with bare rock (no soil)

Question 16

Secondary succession

Answer 16

~New community developing after disturbance to an existing community
~Soil still remains

Question 17

Pioneer species

Answer 17

First organism to occupy an area

Question 18

Climax community

Answer 18

Stable end community that characterizes a region

Question 19

What is the climax community in Virginia?

Answer 19

Temperate deciduous forest

Question 20

Dynamic equlibrum

Answer 20

Ecosystems maintain balance

Question 21

_____ are relatively stable over time.

Answer 21

Ecosystems

Question 22

How might ecological balance be disturbed?

Answer 22

~Introduction of new species
~Extinction of species
~Man-made causes

Question 23

Biodiversity

Answer 23

The total of all the different species living in a given area

Question 24

The greater the _____, the greater the _____ of an ecosystem.

Answer 24

biodiversity; stability

Question 25

List threats to biodiversity.

Answer 25

~Urbanization ~Deforestation ~Pollution ~Mining ~Drilling ~Agriculture

Question 26

Urbanization

Answer 26

Building on natural areas

Question 27

Deforestation

Answer 27

Removing trees

Question 28

Pollution

Answer 28

Introduction of contaminants in the natural environment (land, air, water)

Question 29

Mining/Drilling

Answer 29

Disturbs the lithosphere and strips natural habitats

Question 30

Agriculture

Answer 30

Taking away natural habitats, harmful effects of chemicals

Question 31

List three examples of agriculture.

Answer 31

Herbicides, pesticides, fertilizers

Question 32

Extinction

Answer 32

When a species is completely wiped out of its habitat

Question 33

Endangered species

Answer 33

when a species population is declining rapidly and they are close to extinction

Question 34

Protected species

Answer 34

Not quite endangered yet but will be if changes aren't made