environmental changes 8.11c. environmental changes changes in environmental conditions can affect...
TRANSCRIPT
Environmental Changes8.11c
Environmental Changes
Changes in environmental conditions can affect the survival of individual organisms and entire species.
What causes environmental change?
Natural Processes Human Activities
Natural Processes
Human Activities
Short-term Changes Change that occurs quickly and affects
individuals immediately. Weather: (What happens to plants/animals?)
Heavy rain/strong winds Floods and blizzards
Short term changes can change the genetic makeup of population.
Following a short term change, which traits are passed on
to the next generation?
Long-term Changes
Environmental change that occurs slowly over time and affects populations gradually.
Can permanently alter an ecosystem
Over time may cause some genetic variations to become more favorable or less favorable in the new environment.
If adaptations to the new environment are not present or do not develop, populations can become extinct.
“Adapt or Die!”
Examples of Long-Term Changes Higher Temperatures
Arctic sea ice Polar bear populations Melting of permafrost Community of plant/insect populations in
Tundra biome Organisms’ Behaviors
Migratory birds Caribou
Flip Chart Time!
Create a 2 panel flip chart that compares Natural Processes and Human Activities to long- and short-term environmental changes.
Use all of the following terms and phrases in your flip chart.
Climate Change Commercial fishing Drought Hurricane Farming Burning fossil fuels Floods Logging Ice Age Volcanic eruptions Earthquakes Building dams Seasons Oil Spill Forest Fire Construction Lightning
Questions
Glue LT/ST chart in journal and complete.
Answer questions 1-6 on your SPM sheet.
Natural Selection Natural selection -
individuals better adapted to the environment are able to survive & reproduce.
A.K.A. “Survival of the fittest”
Peppered Moth Example http://peppermoths.weebly.com/
Evolution in the Galapagos https://
www.youtube.com/watch?v=n3265bno2X0
Start video at 5:45
Write the following and answer in your journal.
Name 2 long- or short-term environmental changes that might affect the finches and traits in subsequent populations.
How do these environmental changes affect the finches and traits in subsequent populations?
Selective Breeding Selective Breeding - is the process of breeding
plants and animals for particular genetic traits.
Which of the following examples best reflects selective breeding? A. The mating of two particular sheep to produce
thicker wool B. A genetic mutation in an individual snake that
improves its sense of smell compared to others in its population
C. A few individuals of an extinct species live in zoos D. Two wolf packs live in geographically separate
regions
Primary Succession Begins in a place without any soil
Sides of volcanoes Soil starts to form as lichens and the
forces of weather and erosion help break down rocks into smaller pieces
Called PIONEER SPECIES
Primary Succession
Secondary Succession Begins in a place that already has soil
and was once the home of living organisms
Occurs faster and has different pioneer species than primary succession
Example: after forest fires
Secondary Succession
Based on the observation data and key below, what is the correct identification for the three arachnids?