Unit 2.3

Question 1

trophic level

Answer 1

refers to the position of an organism within a food chain

Question 2

food web def

Answer 2

connects more than one food chain, and is a very complex. it shows how everything is connected to each other

Question 3

food chain def

Answer 3

linear diagram of what eats what

Question 4

source food web def

Answer 4

links are drawn upward from a species that is a basal resource

Question 5

sink food web def

Answer 5

links are drawn downward from a species that is considered a top predator

Question 6

community food web def

Answer 6

considers a group of species in an area and identifies all the trophic links btwn the species

Question 7

3 different types of food webs

Answer 7

source, sink, community

Question 8

top down model postulates what

Answer 8

that predation controls community structure

Question 9

bottom up model postulates what

Answer 9

that nutrients control community structure as they control primary producers

Question 10

diversity def

Answer 10

a function of richness and evenness

Question 11

richness def

Answer 11

the number of different types or components

Question 12

species richness def

Answer 12

the number of differnet species

Question 13

evenness def

Answer 13

the relative abundance of all the different types or components

Question 14

biodiversity used most ocmmonly to refer to what

Answer 14

is used in reference to the species richness of a system

Question 15

ecological def of biodiversity

Answer 15

the richness and evenness among organisms and the ecological complexes in which they occur

Question 16

3 types of diversity

Answer 16

structural, functional, genetic

Question 17

structural diversity def

Answer 17

the richness and evenness amound different types of components in a system

Question 18

functional diversity def

Answer 18

the richness and evenness of differnet roles played by all the different components within a system

Question 19

genetic diversity def

Answer 19

the richness and evenness of genotypes within a particular population or species

Question 20

ecological redundancy def

Answer 20

when two or more different species perform a similar function

Question 21

what is the shannon wiener diversity function used to compare

Answer 21

diversities among communities

Question 22

shannon wiener diversity equation

Answer 22

H= sum of (Pi)(log10(Pi))

Question 23

H

Answer 23

index of species diversity

Question 24

S

Answer 24

number of species

Question 25

Pi

Answer 25

proportion of total belonging to the i the species

Question 26

the higher the H, what

Answer 26

the greater the uncertainty and the higher the diversity

Question 27

what does diverstity provide an ecosystem

Answer 27

stability, making it less vulnerable to collapse

Question 28

diversity-stability hypothesis is what

Answer 28

a straight 1:1 linear progression

Question 29

rivet hypothesis is what

Answer 29

based on ecological redundancy. is more of a slow gradual slope, steep at first but then decreases..

Question 30

redundancy hypothesis is what

Answer 30

based on a few critical species, this one is steep at first and increases but then plataues.

Question 31

idiosyncratic hypothesis is what

Answer 31

the idea that the relationship between stability and diversity is different for every community