Exam 2 Lecture 8 Dispersion

Question 1

fundamental Niche

Answer 1

the entire set of conditions under which an animal (population, species) can survive and reproduce itself.

Question 2

Realized niche

Answer 2

The part of fundamental niche that an organism occupies as a result of limiting factors present in its habitat. Supplement. The presence of competing species in an environment is one example of a limiting factor that restrains or narrows an organism’s ecological niche

Question 3

Characteristics of a population

Answer 3

Distribution, Density Spatial pattern, Abundance, Age distribution ,Birth and death rate, Immigration and emigration rate, Rate of growth

Question 4

Elevation Distribution example

Answer 4

240 species of Tiger beetle in N.A.Often colored; defensive odors; prefersandy habitats

Question 5

Temperature Distribution examples

Answer 5

3 Kangaroos: M. giganteus, M. fuliginosus, and ? barnacles

Question 6

dispersion

Answer 6

the pattern of distribution of individuals within a habitat.

Question 7

Random dispersion

Answer 7

equal chance of being anywhere: uniform resources frequent disruptions

Question 8

Regular Dispersion

Answer 8

uniformly spaced: Exclusive use of areas Individuals avoid each other

Question 9

clumped Dispersion

Answer 9

unequal chance of being anywhere: mutual attraction Patch resource distribution

Question 10

Agressive Stingless bees NEST distribution

Answer 10

regular

Question 11

Non-Aggressive Stingless bee NEST distribution

Answer 11

random

Question 12

Aggressive Stingless bee INDIVIDUAL distribution

Answer 12

clumped

Question 13

Non-aggressive stingless bee INDIVIDUAL disribution

Answer 13

random

Question 14

Life Dispersion of Cresote Bushes

Answer 14

clumped young bushes–>random bushes–>uniform old bushes

Question 15

Why are young Creosote bushes clumped?

Answer 15

seeds fall around the bush

Question 16

Why are middle-aged Creosote bushes random?

Answer 16

mortality reduces clumping

Question 17

Why the old Creosote bushes regular?

Answer 17

Competition enforces regular distribution

Question 18

Large scale population dispersion is usually

Answer 18

clumped

Question 19

abundance

Answer 19

the total number of individuals of a species present in a specified area

Question 20

density

Answer 20

individuals/ specified area

Question 21

Mark-Recapture Technique

Answer 21

Capture and mark a subset of animals and release, then return at a later time to recapture

Question 22

Assumptions of Mark-Recapture

Answer 22

random distribution; no mark effect; no mortality; no migration

Question 23

Mark Recapture formula

Answer 23

Question 24

Quadrant

Answer 24