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Flashcards in Exam 3 Deck (42)
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1
Q

ecological community

A

association of species that co-occur in the same location at the same time

2
Q

mutalism

A

++

3
Q

antagonism

A

+-

4
Q

competition

A
  • -
5
Q

commensalism

A

0 +

6
Q

amenalism

A

0 -

7
Q

neutralism

A

0 0

8
Q

competition defined

A

interaction between organism or species in which BOTH are HARMED

9
Q

how is harm defined and what does it mean

A

fitness

the ability to produce offspring

10
Q

interference competition

A

occurs directly bt indiv via aggression

11
Q

exploitation competition

A

occurs indirectly through common limiting resource which acts as an intermediate

12
Q

symmetric competition

A

each species experiences a roughly equal decrease in fitness

13
Q

assymetric competition

A

one species suffers a greater fitness decline than another

14
Q

intraspecific competition

A

members of the SAME species compete for limited resource

15
Q

interspecific competition

A

individuals of diff species compete for the same resource

16
Q

what does the graph look like for intraspecific competition

A

the final density low while biomass is high

initial density is high while biomass is low

17
Q

isocline

A

system will run out of resources if there’s a certain # of each species

18
Q

when k2 is above k1/a12 on the y axis, what does the graph look like

A

the species can coexist but it is unstable

19
Q

when k1/a12 is above k2 on the y axis, what does the graph look like

A

species can coexist in a very stable manner

20
Q

coexisting only happens when __________ competition is larger than ________ competition

A

intraspecies

interspecies

21
Q

how does how a species change a niche

A

nest size
change in food
wanting to avoid competition
changing behavior

22
Q

microhabitat

A

tiny niche within a larger environment to reduce competition

23
Q

what is one example of antagonism

A

exploitative explosion

24
Q

parasites

A

lives on/in another organism causing it some harm

25
Q

parasitoid

A

lives in close association w/ its host and at host’s expense and sooner or later KILLS host

26
Q

what group are of the golden children of ecology

A

herbivores

27
Q

what is the predation equation for prey

A

dV/dt=rV-aVP

28
Q

what is the predation equation for predators

A

dP/dt=BVP-qP

29
Q

why don’t we see perfect predator and prey curves in nature

A

lack of food for prey
lots of predators eat the the same prey
parasites can make both sick

30
Q

mutualism

A

interaction bt individual that benefits both partners

31
Q

obligate mutualism

A

the organisms cannot survive without each other

32
Q

facultative mutualism

A

each organism can survive independent but are benefited to remain together

33
Q

is mutualism messy or perfect

A

MESSY BIHHHHH

34
Q

context dependent mutualism

A

when the situation is bad, organisms will work together but when things are good, they’ll break the relationship

35
Q

animal guild

A

group of species that exploits the SAME KINDS OF RESOURCES in comparable ways

36
Q

plant life-form

A

basis of their structure and function

grass brush forest

37
Q

what is community structure

A
# of species
abundance of species
type of species
38
Q

what two factors is biodiversity affected by

A

richness and evenness

39
Q

how do you determine the diversity of an area

A

shannon diversity index

40
Q

what is the x axis of the Rank Abundance Curve

A

abundance rank

41
Q

what is the y axis of the Rank Abundance Curve

A

relative abundance

42
Q

how do you calculate relative abundance

A

abundance of one species/abundance of community