Ecology 1-3

Abiotic Factors

anything that’s not living in an ecosystem

biotic factors

anything that’s living in an ecosystem

population

all member of a species

community

all population in a given area (everything biotic)

ecosystem

the community and abiotic factors

6 characteristics of living things

made of cells

has genetic material

can grow and reproduce

response to stimuli (change in environment)

ability to evolve

has a metabolism (chemical reaction)

sexual reproduction

mating between two organisms (lots of genetic variations)

asexual reproduction

single parent (no genetic variations)

Levels of ecological organization

organism- individual member

population- multiple organisms of same species living together

community- multiple different populations living together

ecosystem- community + abiotic factors

biome- multiple ecosystems that share similar characteristics

biosphere- planet (all biotic + abiotic)

what gas does a plant add to the atmosphere

oxygen, photosynthesis

what gas does a plant take out of the atmosphere

Carbon

what is the major activity that humans perform that contributes to an increase of carbon in our atmosphere

burning of fossil fuels (combustion)

what ‘fixes’ nitrogen in the nitrogen cycle

bacteria

how do plants add water to the atmosphere

transpiration

negative impacts humans have on the cycles

water- pollution, deforestation, increased paving

carbon- combustion

nitrogen- increase of fertilizer, combustion

photosynthesis

water + carbon cycle

infiltration

water cycle

transpiration

water cycle

ammonification

nitrogen cycle

decomposition

carbon + nitrogen cycle

combustion

carbon + nitrogen cycle

precipitation

water cycle

respiration

water + carbon cycle

density dependent limiting factors

living things affects large population Ex. competition, parasitism, disease, predation

density-independent limiting factors

non living things affects large or small population

Ex. weather changes, pollution, natural disasters

what pattern of growth will population with limited resources show

logistic growth

what impacts the size of population

food source, disease, space, natural disasters

immigration

people who come into a population

emmigration

people who leave a population

water cycle, organism involved, human neg. impact

tree- transpiration

pollution

concrete- runoff ^

carbon cycle, organism involved, human neg. impact

plant- photosynthesis

combustion

^ co2 ^ temp.

nitrogen cycle, organism involved, human neg. impact

bacteria- ‘fix’ nitrogen

fertilizers

^ pollution

name the graph

logistic growth

(dotted line is called carrying capacity)

name this graph

exponential growth

(unlimited,humans)

name the steps of the water cycle

sun runs water cycle

precipitation

runoff

infiltration

evaporation

transpiration

condensation