AP Bio - Unit 8: Ecology (overview)

studied byStudied by 134 people
0.0(0)
get a hint
hint

what is ecology

1 / 18

Tags and Description

19 Terms

1

what is ecology

study of organisms ond their environment

New cards
2

types of species distribution

uniform (brids, plants), random (plants), clumped (animals, shows social-ness)

New cards
3

density equation

D = n/a

n = # of species a = area size

New cards
4

abundance

size, ,methods of measuring:

  • quadrats

  • mark and recapture

    • lincoln peterson index estimate populaiton size from M&R data

    • N = (M*S)/R

    • M = # marked

    • S = size of second sample

    • R = # marked in recapture

New cards
5

demography

graphs show percent of population by age

left = increasing pop.

middle = stable pop.

right = decreasing pop.

<p>graphs show percent of population by age</p><p>left = increasing pop.</p><p>middle = stable pop.</p><p>right = decreasing pop.</p>
New cards
6

life history

pattern of survival (when they first reproduce, how many offspring, how many reproductive cycles)

New cards
7

fecundity

the ability to make offspring

New cards
8

suvivorship curve

graph that shows # of births in relation to survival

red = K selection, high infant survival rate, less offspring

blue = constant death rate

green = R selection, high infant death, lots of offspring

<p>graph that shows # of births in relation to survival</p><p>red = K selection, high infant survival rate, less offspring</p><p>blue = constant death rate</p><p>green = R selection, high infant death, lots of offspring</p>
New cards
9

formulas for populaiton growth

Birth rate(B) = # births/time

Death rate (D) = # deaths/time

per capita birth (b) = B/n (total population)

per capita death (d) = D/n

exponential growth rate = b-d also written as r (used for population calculations without carrying capacity)

if…

  • r>0 = incline

  • r<0 = decline

  • r=0 = no change

logistic growth = r(n)((k-n)/k)

k = carrying capacity

New cards
10

density dependent factors

competition, predation, disease, ect

New cards
11

density independent factors

natural disasters, climate change, ect

New cards
12

community

the study of interspecific interation of populaitn of different species

New cards
13

ecological niche

a particular role that a species has in a community

New cards
14

interspecific interaction relationships (and who benefits)

  • competition (neither)

  • predation (one)

  • herbivory (one)

  • parasitism (one)

  • commencalism (one benefits, other isnt bothered)

    • mutilism (both)

New cards
15

food webs

a way to map energy flow in a community

<p>a way to map energy flow in a community</p>
New cards
16

10% rule

approximently 10% of energy move up a trophic level

New cards
17

keystone species

a species that other species in a community rely on

New cards
18

invasive species

non-indigenous speciese that can cuse harm to the balence of an ecosystem

New cards
19

simpson’s diversity index

measures diverity, more diversity = better health

D = 1-Σ(n/N)^2

n = # of species in community

N = total individual

New cards

Explore top notes

note Note
studied byStudied by 26 people
Updated ... ago
5.0 Stars(1)
note Note
studied byStudied by 10 people
Updated ... ago
5.0 Stars(1)
note Note
studied byStudied by 6 people
Updated ... ago
5.0 Stars(5)
note Note
studied byStudied by 25 people
Updated ... ago
5.0 Stars(1)
note Note
studied byStudied by 13 people
Updated ... ago
5.0 Stars(1)
note Note
studied byStudied by 45 people
Updated ... ago
5.0 Stars(1)
note Note
studied byStudied by 7 people
Updated ... ago
4.0 Stars(2)
note Note
studied byStudied by 11 people
Updated ... ago
4.0 Stars(1)

Explore top flashcards

flashcards Flashcard24 terms
studied byStudied by 29 people
Updated ... ago
5.0 Stars(1)
flashcards Flashcard106 terms
studied byStudied by 12 people
Updated ... ago
5.0 Stars(2)
flashcards Flashcard22 terms
studied byStudied by 5 people
Updated ... ago
5.0 Stars(1)
flashcards Flashcard20 terms
studied byStudied by 3 people
Updated ... ago
5.0 Stars(1)
flashcards Flashcard45 terms
studied byStudied by 3 people
Updated ... ago
4.0 Stars(1)
flashcards Flashcard50 terms
studied byStudied by 5 people
Updated ... ago
5.0 Stars(1)
flashcards Flashcard44 terms
studied byStudied by 13 people
Updated ... ago
5.0 Stars(1)
flashcards Flashcard39 terms
studied byStudied by 4 people
Updated ... ago
5.0 Stars(1)