Conservation

Question 1

How many major mass extinctions have happened in earths history

Answer 1

5

Question 2

What is the 6th potential mass extinction

Answer 2

Climate change

Question 3

What are examples of how humans modify the ecosystem

Answer 3

Cod (overfishing)

Stellar sea cow

Question 4

What is DNA barcoding

Answer 4

Labeling species to help find poachers & trade of protected species

Question 5

What are hotspots

Answer 5

Places with high levels of biodiversity

Question 6

What can biodiversity be measured as?

Answer 6

Chemical diversity

Question 7

What creates fragmentation

Answer 7

Habitat loss

Question 8

What does habitat loss cause

Answer 8

Extinction and makes conservation harder

Question 9

What is a major problem as habitats are fragmented and shrink in size

Answer 9

The edge effect

Question 10

What is the edge effect

Answer 10

Changes in population or community structures that occur at boundary of 2 habitats

Question 11

What do scientist speculate that African animals coevolved w in Africa that stopped extinction from occurring

Answer 11

Humans

Question 12

What is a keystone

Answer 12

An organism whose decline or removal from a habitat causes species # to change dramatically

Question 13

What does endemic mean

Answer 13

Species doing naturally in only one geopraphic area and nowhere else

Question 14

What happens not long after humans arrive in an area

Answer 14

Rapid Extinction of larger animals

Question 15

What is assumed to be the driving factor regarding megafungal extinction?

Answer 15

Homo sapiens

Question 16

What are edge effects the result of?

Answer 16

Habitat fragmentation or habitat shrinkage

Question 17

What are megafauna

Answer 17

Animals that weigh more than 100 pounds are

Question 18

How many of earths plants may be threatened with extinction

Answer 18

As many as one half

Question 19

How many areas in the world are hotspots

Answer 19

25

Question 20

What is a major problem with hotspots and human moving in

Answer 20

Habitat destruction

Question 21

Why is important to maintain biodiversity

Answer 21

Maintain genetic diversity of wild relatives of common crops

Question 22

Why would a different species of whales fail to recover even though hunting is banned

Answer 22

Loss of genetic diversity

Question 23

The introduction of what caused the losses in endemic species of lake Victoria

Answer 23

The Nile perch

Question 24

When NY was given a choice regarding its drinking water

Answer 24

They chose ecosystem maintenance over development

Question 25

The concern about amphibian populations is

Answer 25

Amphibians are sensitive to environmental changes

Question 26

What is the extinction vortex

Answer 26

What happens as a population decreases and becomes more vulnerable to extinction from a variety of causes

Question 27

What is a megafaunal extinction

Answer 27

Disappearance of almost all large mammals in North America about 10,000 years ago

Question 28

Limitations of preserves

Answer 28

Political and economical pressure makes preserves smaller

Question 29

What happens when species are introduced into an ecosystem that they have not evolved

Answer 29

It can drive several local endemic species to extinction

Question 30

What are some ecosystem services

Answer 30

Maintain chemical quality of natural water Prevent loss of minerals and nutrients Absorb pollution Promote organic wastes of cycling of minerals

Question 31

What are frogs threatened by

Answer 31

Climate change

Question 32

How does ballast water influence colonization

Answer 32

Plants and animals can be transported in ballast of large ocean vessels

Question 33

What is DDT?

Answer 33

A pesticide that was banned in 1972