chapter 41

Question 1

biological community

Answer 1

an assemblage of populations of various species living close enough for potential interaction

Question 2

inter specific interactions

Answer 2

ecologist call relationships between species in community this

Question 3

interspecific competition

Answer 3

occurs when species compete for a resource that limits their growth or survival

Question 4

competive exclusion

Answer 4

strong competition that eleminates a competing species

Question 5

ecological niche

Answer 5

the specific set of biotic and abiotic resources used by an organism

Question 6

predation

Answer 6

refers to an interaction in which one species the predator kills and eats the other the prey

Question 7

mimicry

Answer 7

a prey species may gain protection from a similar appearance to another species

Question 8

herbivory

Answer 8

refers to an interaction in which an herbivore eats part of a plant or algae

Question 9

symbiosis

Answer 9

a relationship where two or more species live in direct and intimate contact with one and other

Question 10

parasitism

Answer 10

one organism the parasite derives nourishment form another organism the host which is harmed in the process

Question 11

commensalism

Answer 11

one species benefits and the other is neither harmed nor helped

Question 12

mutualism

Answer 12

an interspecies interaction that benefits both species

Question 13

facilitation

Answer 13

is an interaction in which one species has positive effects on another species without direct and intimate contact

Question 14

species diversity

Answer 14

a community is teh variety of organisms that make up the community

Question 15

species richness

Answer 15

the number of different species in the community

Question 16

relative abundance

Answer 16

the proportion each species represents of all individuals in teh community

Question 17

trophies structure

Answer 17

teh feeding relationships between organisms in a community

Question 18

food chains

Answer 18

link trophies levels from producers to top carnivores

Question 19

food web

Answer 19

branching food chain with complex trophies interactions

Question 20

dominant species

Answer 20

are those that are most abundant or have the highest biomass

Question 21

keystone species

Answer 21

exert strong control on a community by their ecological roles or niches

Question 22

disturbance

Answer 22

an event that changes a community removes organisms from it or alters n the resource availability

Question 23

ecological succession

Answer 23

the sequence of ecosystem changes after a disturbance

Question 24

primary succession

Answer 24

occurs where no soil exists when succession begins

Question 25

secondary succession

Answer 25

begins in an area where soil remains after desterbance