Con Bio Exam #3

Question 1

what is a reduction of the total area, increased edge amount, and the center of the fragments being closer to the edge a result of

Answer 1

Habitat reduction

Question 2

why may a species potential for dispersal and colonization be limited

Answer 2

there are higher predation and mortality rates from the reduced habitat space

Question 3

what results in lower reproduction rates

Answer 3

increased chance of interbreeding

Question 4

what are 2 problems with a smaller population size

Answer 4

genetic drift and the pop. is more likely to interbreed

Question 5

what causes fluctuations in temp., wind, increased fire rate, and an increase in introduced pest species

Answer 5

Edge Effect

Question 6

what happens as a result of biomagnifiction

Answer 6

toxic chemicals make their way to the top of the food chain (secondary consumers mainly affected)

Question 7

Environmental Pollution

Answer 7

pesticide pollution, water pollution, air pollution

Question 8

What are 2 types of water pollution

Answer 8

Sediment pollution and sewage

Question 9

what happens as a result of sediment pollution

Answer 9

aquatic organisms are covered and there is reduced water penetration

Question 10

what happens as a result of sewage pollution

Answer 10

carries disease causing organisms, creates enrichment

Question 11

what is enrichment

Answer 11

the fertilization of a body of water by adding nutrients such as nitrogen and phosphorus

Question 12

eutrophication

Answer 12

the enrichment of water by the addition of nutrients

Question 13

biological oxygen demand (BOD)

Answer 13

the amount of oxygen needed by microorganisms to decompose waste