Lecture 17

Question 1

Regional species pool

Answer 1

provides upper limit on the # of species that can be found in a community

Question 2

Biotic resistance

Answer 2

when interactions with the native species exclude the invader

Question 3

Resource paritioning

Answer 3

competing species coexist by using resources in different ways; this decreases competition & increases species richness

Question 4

Intermediate disturbance hypothesis

Answer 4

where species diversity is the greatest; low disturbance = competition determines diversity; high disturbance= species can’t survive

Question 5

Lottery models

Answer 5

emphasize the role of chance in maintaining species diversity

Question 6

Community stability

Answer 6

tendency in a community to remain the same in structure & function

Question 7

Complementary hypothesis

Answer 7

as species richness increases, linear increases in community form

Question 8

Redundancy Hypothesis

Answer 8

the functional contribution of additional species reaches a threshold; more species added, more overlap in function or redundancy

Question 9

Driver & Passenger hypothesis

Answer 9

strength of ecological function varies greatly; driver = large effect, passenger = minimal effect

Question 10

Variation of Driver & Passenger hypothesis

Answer 10

assumes there could be overlap between driver & passenger functions