Uvic Bio 215 Final Exam with Complete
Solutions| Latest Update
What are the top five causes of bird mortality? 1. CATS
2. WINDOWS!
3. High tension wires
4. Pesticides
5. Cars
How many birds are killed by windows / year? 1 billion
What are the top three areas with the highest percentage of alien species? 4.New
Zealand
5.Campbell island
1. South Georgia
3.Kerguelen
2. Tristan da Cunha
How many birds to cats kill annually? 1.4-3.7 billion
on average a species persists for about___________ in the fossil record before disappearing
1 million yrs
What six things contribute to likelihood of extinction? Rarity
Dispersal ability
Degree of specialization
Population variability
,Trophic status
Reproductive ability
What are the top three countries with the most endangered mammals? Madagascar
Indonesia
Brazil
What are the top three countries with the most endangered birds? Indonesia
Brazil
China
What are the top three countries with the most endangered reptiles? USA
India
Mexico
What are the top three countries with the most endangered amphibians? USA
Italy
Mexico
What are the top three countries with the most endangered fishes? USA
Mexico
Indonesia
Five common processes lead to intinction. What are they? What is number one? 1.
Habitat loss
exotic species, pollution, over exploitation, disease
, If an oceanic island is 25km^2, what is the extinction rate per 100 years? What about 1km^2?
~10%
~50%
The top three threats to animal populations are? Give numbers. Exploitation 37%
Habitat degradation and change 31%
Habitat loss 13%
How many approximate extinctions occur per year? Between 500-36,000 species/yr
Scientists documented encounters between
Explanations for global species richness: a) primary productivity
b) competition theory
c) climate variability theory
d) spatial heterogeneity theory
e) environmental age theory
f) geological time and cladogenesis theory
Define trophic levels. the sequence of steps in a food chain or pyramid
What are the simplified steps for trophic levels? Secondary consumer
Tertiary consumer
Primary consumer
Primary producer
Describe food web complexity? 1) number of trophic levels
Solutions| Latest Update
What are the top five causes of bird mortality? 1. CATS
2. WINDOWS!
3. High tension wires
4. Pesticides
5. Cars
How many birds are killed by windows / year? 1 billion
What are the top three areas with the highest percentage of alien species? 4.New
Zealand
5.Campbell island
1. South Georgia
3.Kerguelen
2. Tristan da Cunha
How many birds to cats kill annually? 1.4-3.7 billion
on average a species persists for about___________ in the fossil record before disappearing
1 million yrs
What six things contribute to likelihood of extinction? Rarity
Dispersal ability
Degree of specialization
Population variability
,Trophic status
Reproductive ability
What are the top three countries with the most endangered mammals? Madagascar
Indonesia
Brazil
What are the top three countries with the most endangered birds? Indonesia
Brazil
China
What are the top three countries with the most endangered reptiles? USA
India
Mexico
What are the top three countries with the most endangered amphibians? USA
Italy
Mexico
What are the top three countries with the most endangered fishes? USA
Mexico
Indonesia
Five common processes lead to intinction. What are they? What is number one? 1.
Habitat loss
exotic species, pollution, over exploitation, disease
, If an oceanic island is 25km^2, what is the extinction rate per 100 years? What about 1km^2?
~10%
~50%
The top three threats to animal populations are? Give numbers. Exploitation 37%
Habitat degradation and change 31%
Habitat loss 13%
How many approximate extinctions occur per year? Between 500-36,000 species/yr
Scientists documented encounters between
Explanations for global species richness: a) primary productivity
b) competition theory
c) climate variability theory
d) spatial heterogeneity theory
e) environmental age theory
f) geological time and cladogenesis theory
Define trophic levels. the sequence of steps in a food chain or pyramid
What are the simplified steps for trophic levels? Secondary consumer
Tertiary consumer
Primary consumer
Primary producer
Describe food web complexity? 1) number of trophic levels
