pop ecology

Question 1

species

Answer 1

a grp of closely related organisms that can interbreed + produce viable, fertile offspring

Question 2

population

Answer 2

a grp of organisms of the same species that occupy a particular area at a specific time and that can breed with one another

Question 3

community

Answer 3

grps of diff species populations that interact with each other within a specific habitat

Question 4

community ecology

Answer 4

study of interactions betw pop that form a community

Question 5

biotic

Answer 5

living organisms

Question 6

abiotic

Answer 6

non- living organisms

Question 7

ecology

Answer 7

study of living organisms and their relationship to each other and the enviro

Question 8

pop ecology

Answer 8

study of the fluctuations in pop size and the factors that regulate populations

Question 9

ecological niche

Answer 9

functional role + position of a species within a community

Question 10

habitat

Answer 10

enviro in which an organism completes its lifecycle (growth, repro, eventually death)

Question 11

niche

Answer 11

specific area where an organism inhabits

Question 12

natality

Answer 12

the % incre of a pop due to no. of births in a given season/ yr

Question 13

mortality

Answer 13

death rate whithin a pop, usually a % of pop

Question 14

fertility

Answer 14

no. of births per yr for all females who can produce offspring (betw age 15- 45)

Question 15

immigration

Answer 15

one way movement of organisms into an area where they become established, either for breeding season or temp

Question 16

emigration

Answer 16

one way movement of organisms out of an area to become established

Question 17

migration

Answer 17

movement from one place to another at certain times of the yr or during a particular period of an organism’s life cycles

Question 18

enviro resistance

Answer 18

all factors that are limiting the biotic potential + numerical incre of a pop (eg, lack of water, food, space)

Question 19

carrying capacity

Answer 19

largest no. of indiv in a biological species that am ecosystem can support over an indefinite time

Question 20

stable population

Answer 20

a pop with zero growth rate, neither growing nor shrinking in size

Question 21

unstable population

Answer 21

a pop whose size exceeds the carrying capacity of an area

Question 22

density-dependent factors

Answer 22

factors that have a direct correlation (relationship) to the size of the pop in an area (greater pop size= greater the influences of the factors)

Question 23

density-independent factors

Answer 23

factors that exert an influence on a pop regardless of its size

Question 24

endemic

Answer 24

organisms found only in specific area + nowhere else in world

Question 25

pop size

Answer 25

total no. of indiv in a pop

Question 26

pop density

Answer 26

no. of indiv of a pop per unit area

Question 27

what 3 factors influence pop size

Answer 27

1- natality (birthrate )
2- mortality (death rate)
3- migration ( immigration, emigration)

Question 28

what 2 factors incre pop size

Answer 28

1- natality - rate at which new indiv added to pop via reproduction
2- immigration - rate at which indiv join a pop from a diff area

Question 29

what 2 factors decre pop size

Answer 29

1- mortality- rate at which indiv removed from pop due to death
2- emigration - rate at which indiv leave a pop to go to another area

Question 30

what are the 2 distinct patterns of natality and what are their 4 characteristics

Answer 30

1) r-strategy: 1- produce many offsprings, 2- small chance survival, 3- parental care absent, 4- pioneer species

2) k- strategy: 1- produce fe offsprings, 2- high chance of survival, 3- parental care present, 4- climax species

Question 31

fertility rate

Answer 31

no. of births per 1000 females of child bearing age

Question 32

fecundity rate

Answer 32

ave. no. of children born one gen per females pf child bearing age