SNC-1D
B9) Species At Risk
Read pp 83-85 and complete the note below. Then complete the questions that follow.
Biodiversity Under Attack
Many species on Earth are becoming ________________, which means that the
species no longer exists anywhere on the planet.
One of the main reasons for extinctions is habitat loss caused by:
1) ________________________
2) ____________________________
3) ________________________
4) ____________________________
Extinction is also a ________________ process, with at least _____________
major extinction events occurring over the past billion years. These are caused by
catastrophic events such as ______________________ and _________________.
However, between these mass events, extinctions rates have normally been quite
_______.
Humans, on the other hand, have drastically _______________ the rate of
extinction, including _______ species of mammals and birds shortly after humans
reached North America ____________ years ago. These species included
___________, ______________, _______________, and _________________. In
Canada alone, ___________ species of vertebrates (animals with backbones) have
become extinct in the past __________ years, and the rate of ___________caused extinction is increasing.
Species at Risk
Even when species do not become extinct there can be ecological _____________
if a population gets so low that it cannot fill its ecological ___________. The
status of species in Canada is monitored by COSEWIC, which stands for the
__________________________________________________________________.
Complete the table on the back of this sheet which describes the classification of
species at risk in Canada.
When species are placed in the _________________ or __________________
category, another organization called RENEW, develops a recovery plan. As of
2008, _______ plants and animals have been classified at risk, and _______ action
plans have been developed.
List the specific threats to biodiversity in sections 3.4 – 3.7 (i.e. the titles of each section).
_________________________________ ________________________________
_________________________________ ________________________________
Your classmates will be presenting some of these topics next week.
SNC-1D
B9) Species At Risk
Classification of species at risk in Canada (2008). (Complete the table using p 85)
# of
Classification
Definition
Canadian
Examples
species
Answer p 86: 1-3, 5, 7, 8