concept 3

Question 1

list the factors that contribute to a high population density vs a low population density

Answer 1

AFFECTS HIGH POP.
- birth
- immigration
AFFECTS LOW POP.
- Death (mortality )
- Emigration

Question 2

explain the difference between logistic and exponential population growth

Answer 2

exponential growth grows without limit- ex. human population

logistic populations grow quickly at first then level off (at the carrying capacity, the theoretical maximum population that a given environment could support)

Question 3

sketch and label an example of the different types of survivorship curves. describe an example of each one.

Answer 3

Type 1: late loss, heavy parental care, like humans (many survive until old age)

Type 2: Constant loss where mortality isn’t affected by age, like some birds or rodents. graoh looks like a downwards diagonal line

Type 3: early loss, with lots of offspring, but after making it past childhood there is less death. (opposite of type 1)

Question 4

explain the three types of dispersion patterns

Answer 4

Random: completely random (
Uniform/even: uniform and even
Clumped: clumped- animals that live in packs

Question 5

what are specific examples of each type of limiting factor?( density dependent and density independent facotrs)

Answer 5

density-dependent- competition, predation, parasitism, disease

density-independent- weather changes, pollution, natural disasters

Question 6

define population

Answer 6

a group of organisms of the same species living in the same place

Question 7

define population density

Answer 7

measures the number of individual organisms living in a defined zone

Question 8

define survivorship curve

Answer 8

graphic representation of mortality patterns showing the number of individuals in a population that can be expected to survive to any specific age

Question 9

define exponential growth

Answer 9

population grows without limit

Question 10

define logistic growth

Answer 10

population grows quickly at first and then levels off

Question 11

define carrying capacity

Answer 11

the theoretical maximum population that a given environment could support

Question 12

define limiting factors

Answer 12

aspects fo the enviorment that limit the size a population can reach

Question 13

define biotic

Answer 13

living

Question 14

define abiotic

Answer 14

nonliving

Question 15

define density-dependent factors

Answer 15

density-dependent limiting factors have a bigger impact on more dense populations

Question 16

define density-independent

Answer 16

density- independent limiting favortors regulate population growth regardless of its size or density- weather changes pollution, natural disasters