1. Title of notes: BIODIVERSITY pg. 39 & 40
Goal for lesson: write on self assessment worksheet
I can describe in detail two things that threaten biodiversity.

2. Bell work Week 36 Pick a science word and write the definition.
Chapter 14 in Life Science book
Check calendar!

3. Benefits of Biodiversity
Clean air
Food to eat
Clean water
Medicines
Raw materials
Recreational purposes

4. The variety of life in an ecosystem.
What is biodiversity?
The variety of life in an ecosystem.

5. Every species plays a vital role in their ecosystem.
Why is biodiversity important?
Every species plays a vital role in their ecosystem.

6. BIODIVERSITY THREAT habitat destruction
Development of natural areas for cities or
agriculture results in ____________________
habitat destruction

7. BIODIVERSITY THREAT Habitat fragmentation
Splitting a habitat into smaller disconnected pieces = _____________________
It results in small “islands”
of natural area isolated
from each other by crop
land, pasture, pavement,
or even barren land.
Habitat fragmentation

8. BIODIVERSITY THREAT INVASIVE SPECIES PREDATORS INCREASE
One of most important threats to
biodiversity come from apparently
harmless plants or animals that
humans transport into new habitats =
_____________________
New habitats don’t have ____________
and parasites that control the population
in their native habitats, so invasive species
populations _____________ rapidly.
INVASIVE SPECIES
PREDATORS
INCREASE

9. BIODIVERSITY THREAT pollutants The addition of ________________
= harmful materials that can enter the biosphere through land, water or air can also threaten biodiversity.

10. _____ was first modern insecticide
Example:
_____ was first modern insecticide
It was cheap, stayed active for long time, and kills many different insects
Used to control agriculture pests
and disease carrying
_______________
DDT
MOSQUITOES

11. ______________________. food chain tissues doesn’t degrade
DDT in the environment gets into organisms through the ___________, is stored in __________, and
______________________.
food chain
tissues
doesn’t degrade

12. → → BIOLOGICAL MAGNIFICATION ______________________________
= the ____________ of a harmful substance
____________as it passes to organisms at
_______________levels in food chain or web.
concentration
increases
higher trophic
Plants pick up
DDT from water
& store it
Herbivores eat
plants and store some DDT
Carnivores eat
herbivores and store more DDT → →

13. WHAT DOES IT MEAN? REMEMBER! Everything is connected.
BIODIVERSITY is a measure
of the health of an ecosystem.
Image from: Pearson Education Inc, publishing as Pearson Prentice Hall ©2006