What do all living things need for survival?
- All living things need:
Video: https://www.youtube.com/watch?v=xHjqaOx568o
What do all living things need for survival?
All living things need:
- Suitable living conditions (habitat)
- Oxygen (gas exchange)
- Food
- Energy
- Water
S.O.F.E.W
How long can you live without them?
- Suitable living conditions (habitat)
weather dependent – hours?
- Oxygen (gas exchange)
approx. 5 mins
- Food
1 – 3 weeks (Ghandi)
- Energy
Sleep – record is 11 days
- Water
3 days
How has our ability to satisfy our needs and wants
changed over time?
How has our ability to satisfy our needs and wants
changed over time?
- technology allows us to turn our attention to
"wants" instead of "needs"
- we can satisfy our needs and wants for food,
clothing and other manufactured goods because
of global trade, global transportation and industrial
farming/manufacturing
- we live in large homes with heat, electricity and
running water
- we travel in cars, trains and airplanes
Topic 1: Interactions within an ecosystem
- What is ecology?
What is an ecosystem?
- ecosystem - all the interacting parts of a
biological community and its environment
- it includes the living (biotic) and non-living
(abiotic) things interacting in that environment
Topic 1: Interactions within an ecosystem
- Ecology is the study of the relationship between
living organisms and their environment
- An organism's environment includes the other
living things AND the non-living things in their
surroundings.
- An ecologist is a scientist who studies the
relationships between living things and their
environment.
Some famous ecologists
One of the most famous
ecologists was Charles
Darwin. He studied how
organisms evolve (change)
over time in response to
changes in their
environment. His theory for
how these changes occur
is called "natural selection".
Some famous ecologists
Rachel Carson is known
for popularizing ecology
and the environmental
movement with her famous
book Silent Spring. The
book, published in 1962,
documented the negative
effects of pesticides on the
environment.
Some famous ecologists
More recently, Jane Goodall and David Suzuki have
continued to show us that our actions have impacts
within the living and non-living parts of our own
environment.
Case study
- By 1928, the Swift Fox had disappeared from the
Alberta prairies. What happened to these
creatures? This is the sort of question that
ecologists can help us answer.
Case study
- It turns out that hundreds of swift foxes were
accidentally killed when farmers were using
poison to kill the wolves and coyotes that preyed
on their cattle. Swift foxes also lost much of their
natural home when land was taken over for farms
and cities.
Case study
- Now, humans are helping the swift fox! New
programs have reintroduced the swift fox to the
prairies, and groups of concerned citizens are
working with ecologists to ensure that swift foxes
have the type of home that they need.