Topic 23

Question 1

Community

Answer 1

group of species that occupy a given area that interact directly or indirectly under a particular set of environmental conditions

Question 2

All species that live together are interconnected

Answer 2

both indirect and direct relationships amount species are important for determining each species population dynamics and community structure

Question 3

Delineation of communities is somewhat ..

Answer 3

arbitrary and dependent on the focus on the researcher

Question 4

Community structure includes

Answer 4

physical structure of the environment and biological structure and the nature of species interactions

Question 5

Physical structure reflects ..

Answer 5

abiotic and biotic characteristics

Question 6

The range of environmental conditions or resources set a ..

Answer 6

limit on the number of spices and their relative abundance in a community

Question 7

The number of fundamental niches represents the ..

Answer 7

primary constraint on the biological structure of a community

Question 8

General pattern of community structure

Answer 8

more fundamental niches- the higher the number of species

Question 9

Biological structure

Answer 9

reflects the diversity of species in the community and their interactions w each other

Question 10

Biological structure is defined by ..

Answer 10

• species richness (S=number)
• relative abundance of species
• species composition (type of species that make up community)

Question 11

A larger number of species in community does not necessarily mean..

Answer 11

higher diversity

Question 12

Evenness

Answer 12

equitable relative abundance of species in a community

Question 13

Dominance

Answer 13

inequitable relative abundance of species in a community

Question 14

Where individuals vary in size ..

Answer 14

abundance alone may not be a sufficient indicator of dominance

Question 15

Define dominance based on a combination of..

Answer 15

abundance and size (% cover in plants and % biomass of animals)

Question 16

High dominance means…

Answer 16

low diversity (high evens =high diversity)

Question 17

Biodiversity

Answer 17

biological structure of the community

Question 18

Biodiversity can become ..

Answer 18

complex (formulas that exist to calculate it=diversity indices)

Question 19

Diversity indices

Answer 19

simpsons and shannon-weaver

Question 20

Rank abundance plots can show us..

Answer 20

• species richness

- slop of the line tells us evenness

Question 21

Straight horizontal line indicates..

Answer 21

high evenness

Question 22

Steep slope indicates..

Answer 22

lower evenness

Question 23

Most abundant species =

Answer 23

rank 1

Question 24

Many scientists argue that all communities have ..

Answer 24

one typical pattern of abundance which is few abundant species, few rare species and most species of moderate abundance

Question 25

Different curves reflect different..

Answer 25

sampling efforts

Question 26

Indirect interactions are …

Answer 26

difficulty to study the interactions between 2 species in nature without considering their interactions with other species

Question 27

Community is characterized by ..

Answer 27

many direct and indirect interactions

Question 28

High abundance of iva there will be more..

Answer 28

apeds