Lecture 5.7

Question 1

What can be done about human impact?

Answer 1

Efforts into issues
Stabilize the world’s population
Alternative energy
Agriculture - could use wild species for crops

Question 2

A new field of biology concerned with countering the current rate of extinction on a community and ecosystem level

Answer 2

Conservation biology

Question 3

There are currently ___ species named in the world

Answer 3

1.5 million

Question 4

Extinction is a normal process but the issue is

Answer 4

it is occuring at a higher rate

Question 5

In danger of extinction

Answer 5

endangered

Question 6

likely to become endangered

Answer 6

threatened

Question 7

Why not let species go extinct?

Answer 7

We use many species for clothing, food, medicine, housing, etc

Question 8

Humans are dependent on healthy ecosystems

Answer 8

If species go extinct then the community and ecosystem is not healthy.

Question 9

Why do species go extinct

Answer 9

Loss of genetic variability
Disruption of ecological relationships
Habitat loss/fragmentation

Question 10

If there is no genetic variability then

Answer 10

species cannot adapt to deal with problems

Question 11

The decreasing sardine population on the Galapagos Island led to the decline of the

Answer 11

Blue Footed Boobie

Question 12

Happens when we break up land. 2/3 of the extinction has this as a factor

Answer 12

Habitat fragmentation

Question 13

If there is a 90% loss in habitat then there will be a ___ loss in species

Answer 13

50%

Question 14

Significant percent of fish species breed here. 40% have died

Answer 14

Coral reef

Question 15

Why is the coral reef dying

Answer 15

Ocean acidification

Human harvesting

Question 16

Are becomes broken into smaller fragments

Answer 16

Fragmentation

Question 17

More fragments lead to more __ which leads to ___

Answer 17

edge effect

less useful land

Question 18

Places where there are a high number of species that only live there

Answer 18

Hot spot

Question 19

Other reasons for extinction

Answer 19

Over exploitation

Introduced species

Question 20

Many cases of ___ are threatened or endangered. Are getting certain fungal diseases. The ones who live have an microbial shield

Answer 20

Amphibians

Question 21

How do biologists determine the risk of extinction

Answer 21

PVA - population viability analysis

Question 22

Genetic variability measured
Birth rates measured
Death rates measured

Answer 22

Population viability analysis

Question 23

The smallest population size that can still survive

Answer 23

minimum viable population size

Question 24

If a species is more vulnerable to extinction

Answer 24

Low genetic variability
If it is only found locally/endemic
Migrant species
Commercially harvested

Question 25

Use of a species to detoxify an area

Answer 25

Bioremediation

Question 26

Bioremediation
Augmentation of ecosystem processes
Improve genetic diversity
Propagate capture animals then release
Keystone species

Answer 26

Habitat restoration