Characteristics of Living Things. Characteristics of ALL Living Things.
ECOLOGY - · PDF fileEcosystem-all the living & nonliving things that interact in a ......
Transcript of ECOLOGY - · PDF fileEcosystem-all the living & nonliving things that interact in a ......
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ECOLOGYThe study of the interactions between
organisms & the environment.
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Review basic Ecology vocabulary:
•organism = a living thing extinct = species that is no longer living
•energy = ability to do work endangered = species at risk of becoming extinct
•food = substance an organism needs for energy bio- = prefix that means “life”
•habitat = home for an organism biology = the study of life
•predator = organism who hunts & eats another one hierarchy = ranking in order
•prey = organism who is hunted & eaten by another
•photosynthesis = process when plants make their own food using sunlight for energy
*Activity = for 60 seconds, review these terms with a partner
*If you don’t understand any of the basic terms on this slide, please come to
Knight Time or tutoring!
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Review basic Ecology vocabulary:
•Producers = (also called autotrophs) make their own food using sunlight;
plants, algae, & some bacteria
•Consumers = (also called heterotrophs) eats other organisms for energy;
animals & fungi•carnivore = only eats animals (cat, dog, lions, crocodiles, T-rex)
•herbivore = only eats plants (cows, bees, pandas, deer, termites, lemurs)
•omnivore = eats both plants & animals (humans, bears, squirrels, turtles, fish)
•Decomposers = (process called rotting) breaks down dead organisms into soil;
bacteria & fungi
*optional activity = review these terms with a partner
*optional activity = make a drawing of these 3 functional groups in your notes
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Biotic = living components of an ecosystem
Abiotic = nonliving components of an ecosystem
Place the following terms on the Venn diagram in your notes:
grass sunlight spiders climate flowers
rotting tree air fish water dead frog U.V. light
sun living temperature squirrel soil nonliving
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Organization
Biosphere - areas of planet earth that support life
(air, land, water, volcanic thermal vents…what?)
Biome - an ecosystem that occupies a particular climate zone
Ecosystem - all the living & nonliving things that interact in a particular area
Community - different groups of populations in the same area
Population - group of one type of organism
Organism - individual living thing
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Where would a biome fit into this hierarchy?
biome
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Climate Biome
Long term
temperature &
weather conditions in
a particular area.
Plants, animals, &
ecosystems adapted to
a particular climatic
condition.
Essential question: What are some specific ways climate affects a biome?
•Cacti must conserve water in the desert because of dry conditions.
•Fish have gills to breathe the dissolved oxygen in the water they live in.
•Polar bears have large amounts of fat to store energy to survive arctic conditions.
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Biomes
Global regionAbiotic Biotic
Koppen Climate Zone Biome
Polar(no summers)
example:polar climate zone
example:tundra biome
Temperateexample:
humid subtropical
climate zone
example:temperate deciduous
forest biome
Tropical(no winters)
example:tropical dry climate zone
example:savanna biome
*optional activity = biomes activity or worksheet
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Food Webs
A system of interdependent food
chains
Food Chain
Hierarchical series of organisms
each dependent on the next as
a source of food
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Levels of Consumption
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Extinction
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Organism that takes resources away
from a native (natural) species.
Invasive Specieswinterspring
summer fall
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Invasive Species
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Which has more biodiversity?
A B
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Biodiversity
Bio = “life” Diversity = “variety”
Biodiversity is the variety of life on Earth and the
essential interdependence of all living things.
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Biodiversity...Why is it important???
- “At least 40 per cent of the world’s economy and 80
percent of the needs of the poor are derived from
biological resources. In addition, the richer the
diversity of life, the greater the opportunity for medical
discoveries, economic development, and adaptive
responses to such new challenges as climate change.”
The Convention about Life on Earth,
- Variation of genetic codes….
- Resistance to disease…
- Medical Discoveries…
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Is that important?
Do we need balance in the biosphere?
Hold that thought...
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Carrying CapacityThe maximum number of organisms an ecosystem can hold.
Think of an ecosystem as a bucket that can only hold so much.
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How many fish can an aquarium hold?
What does it depend on?
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These things depend on limiting factors.
What are limiting factors?
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Population Sizebirth rate = how fast a population reproduces death rate = how fast a population dies
Population = birth rate - death rate
if birth rate > death rate then population grows or increases
if birth rate < death rate then population shrinks or declines
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Human Population Growth
Fun Fact:
Demographers estimate that, in the decade of the
1990’s, the Atlanta metro (driving distance) area
grew in population faster than any other area in
the history of human civilization.
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How does population
growth affect our
resources?
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Human ImpactsUrban development (humans building stuff) has
caused deforestation, logging, draining wetlands,
habitat fragmentation & destruction.
Various forms of Pollution like chemical spills
Hunting & farming are both unnatural limiting
factors.
Harvesting, mining, & drilling take away natural
resources.
Invasive Species
Global Warming
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Human Impact Examples:
CategoryWhat humans
need
What humans
doWhat happens
Impact on the
environment
Energy coal burning coalSO2 released
into aircreates acid rain
Food cheap foodconcentrated
animal farms
excessive
manure runoffeutrophication
Spacehomes &
mallsdraining
wetlands
reduces buffer
zones
increases
flooding &
pollution
Beauty green yardstoo many water
sprinklers
excessive water
use
fresh water
shortages
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Habitat Fragmentation
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Habitat Destruction
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Mining
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Invasive Species
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Global Warming and Polar Ice
Caps
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AgricultureThe domestic cultivation
(farming) of plants & animals
for food or products.
Tractor
this is Tilling
Pros: Control weeds, mix the soil, & make level.
Cons: Dries soil, causes erosion, & CO2.
Why
Till?
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Traditional Farming Issues
1. Biodiversity - Monoculture vs. Polyculture, disease
2. Soil Quality - Erosion, Till vs. Nontill,
3. Fertilizers/Pesticides - Eutrophication
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Conventional - Sustainable
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Ways to Farm Friendly
No Till planting
Contour plowing
Buy Local
Natural Fertilizers
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To live in a way that
natural resources (such as
energy & materials) are not
depleted or permanently
damaged.
Sustainability
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Energy Resources• Anything used by humans as an energy source.
Can be replenished or replaced
in short amount of time.
Once used up, they are gone
for millions of years.
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Carbon Footprint
Amount of CO2 emitted (released) due to the
consumption of fossil fuels by a particular person
or group.
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Ecosphere