LEC 9/3 Ecology1

Question 1

def: eco

Answer 1

home

Question 2

def: logy

Answer 2

understanding

Question 3

Fact

Answer 3

ecology is NOT the same as environmentalism

Question 4

def: environmentalism

Answer 4

social movement dedicated to protecting the natural world

Question 5

def: ecology

Answer 5

is the scientific study of the interactions between organism and their environments

Question 6

def: abiotic factors

Answer 6

non-living chemical and physical factors. ex o2, sunlight, cO2

Question 7

def: biotic factors

Answer 7

living organisms. ex bees, birds, plants get eaten, bacteria in stomach

Question 8

fact

Answer 8

organism interact with environment and can modify their environment for their survival

Question 9

def: population ecology

Answer 9

group of individuals

Question 10

def: community ecology

Answer 10

all organisms in a particular area

Question 11

def: ecosystem ecology

Answer 11

all organisms and abiotic factors

Question 12

def: population

Answer 12

group of individuals of same species living in a particular area

Question 13

def: population ecology

Answer 13

studies how and why populations change

Question 14

def: growth rate

Answer 14

change in the size of a population expressed as a percentage of the population

Question 15

how does a pop. grow b a fixed growth rate?

Answer 15

exponential

Question 16

def: exponential growth

Answer 16

j-shaped curve, fixed % rather then a fix amount, takes less time to double the population. ex money in savings amount over time it keeps growing

Question 17

under which environmental conditions does exponential growth happen?

Answer 17

under unlimited resources, endless amount food, space, no disease, no predators

Question 18

in nature, can an exponential growth continue forever?

Answer 18

no, resources are limited not endless.

Question 19

what are some environmental resistance that low down exponential growth?

Answer 19

water, space, food, predators, disease

Question 20

during logistic growth what happens?

Answer 20

pop grows exponentially

Question 21

when resources dwindle, growth slows close to zero

Answer 21

births=deaths

Question 22

def: carrying capacity

Answer 22

pop size stabilizes, the max # of individuals of a given species that the environment can sustain (s-shaped curve)

Question 23

will the carrying capacity be the same for rabbits in tasmania?

Answer 23

no because rabbits are much smaller and require less resources.

Question 24

fact

Answer 24

it took 1.5million yrs to reach the 1st billion (human pop)

Question 25

fact

Answer 25

earth’s carrying capacity for humans is between 4-16 billion

Question 26

fact

Answer 26

higher consumption= higher footprint

Question 27

def: ecological footprint

Answer 27

measures the amount of earth surface that an individual or a country needs

Question 28

how does ecological footprint and carrying capacity relate to each other?

Answer 28

higher footprint the less carrying capacity