Why are top carnivours particularly susceptible to species extinction?

They need a lot of space, have small populations, are hunted

What is the best focus for conservation efforts?

None of the answers are sufficient

Climate change and hunting can interact and affect animal populations by...

shrinking habitat size and reducing population size

The CORE driver of biodiversity loss is...

human population growth and material consumption

Why is it difficult to identify a single cause to species decline?

Because there may be multiple interacting causes

What is the most common way to estimate number of contemporary species extinctions?

Calculating it as a function of area of habitat lost

What is a "cascade effect"?

Extinction of one species that leads to further extinctions

Why are islands particularly rich in endemic species?

Species evolved in geographic isolation from continents

Why is conservation of migratory species particularly difficult?

Species rely on more than one habitat in their lifecycle

Persistent Organic Pollutants are dangerous because they are...

toxic and don't break down rapidly in the environment

An "ecosystem engineer" is

a species that can modify a habitat and change the ecosystem

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Threats to Biodiversity

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Answers

1
Why are top carnivours particularly susceptible to species extinction?
They tend to be attracted to human activities
They need a lot of space, have small populations, are hunted
They are not - the statement in incorrect
Because they are valued in trophy hunting
2
What is the best focus for conservation efforts?
All biodiversity
Particular habitats
Particular species
None of the answers are sufficient
3
Climate change and hunting can interact and affect animal populations by...
duplicating the effects of the last ice age
increasing water availability and reducing predation risk
expanding potential range and increasing food availability
shrinking habitat size and reducing population size
4
The CORE driver of biodiversity loss is...
proliferation of invasive species
unregulated price of dairy products
human population growth and material consumption
addiction to internet
5
Why is it difficult to identify a single cause to species decline?
Because there may be multiple interacting causes
Because there is not enough research to reach a conclusion
The statement is false - usually we know exactly the cause
Because you don't know what you've got till its gone
6
What is the most common way to estimate number of contemporary species extinctions?
Qualitatively, through discussions with experts
Calculating it as a function of area of habitat lost
Assessing them based on the fossil record
Comparing # of species today versus # of species in the past
7
What is a "cascade effect"?
The actions of one generation cause problems for the next
Extinction of one species that leads to further extinctions
Water flowing over stones cleans the water of pollutants
Pollution in the watershed poisons downstream ecosystems
8
Is there any hope?
Coffee. I mean... what was the question?
Nope.
Couldn't this quiz be written in Hebrew?
Yes, and we're it!
9
Reasons for decline of amphibian populations include:
UV radiation
All of these and more
Disease
Chemical pollutants
10
To what process can we attribute biodiversity loss in Madagascar?
Overhunting
Urban sprawl
Deforestation
Climate change
11
Why are islands particularly rich in endemic species?
Islands are large, so there are many habitat types
Islands are small, so species become niche specialists
Species evolved in geographic isolation from continents
None the answers are correct
12
Which of the following taxa is particularly at risk of extinctions?
Amphibians
Birds
Fish
Insects
13
The IUCN Red List is
a list of extinct species
a list of roads where roadkill is especially prominant
a list of endangered species
a list of human activities that threaten species
14
Why is conservation of migratory species particularly difficult?
Poachers know exactly where to hunt these species
Because they are here today and gone tomorrow
Species rely on more than one habitat in their lifecycle
Species become vectors for disease transmission
15
Persistent Organic Pollutants are dangerous because they are...
carcinogenic when inhaled
commonly released by nuclear facilities and are radioactive
toxic and don't break down rapidly in the environment
artificial chemical that replace natural plant defences
16
What percentage of species were described as endangered by the IUCN in 2004?
2%
11%
41%
86%
17
What animal is most often implicated in the extinction of island birds?
gorilla
snake
rat
cockroach
18
An "ecosystem engineer" is
an elephant with a hardhat and a safety vest
an ecologist who works to restore degraded habitats
All of the answers are correct
a species that can modify a habitat and change the ecosystem
19
What is considered to be the most significant direct threat to biodiversity?
Habitat loss
Climate change
Overhunting
Pollution
20
Extinction is...
Reversible
Forever
Unfortunate, but tolerable
A pilsner brewed outside of Boston, Massachusetts

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