Biology Chapter 5

Front 1

What is the major threat to biodviersity?

Back 1

the major threat to biodviersity is habitat loss.

Front 2

What is an example of habitat degradation?

Back 2

an example of habitat degradation-- Acid rain changes the pH of soil, killing some trees.

Front 3

What is NOT a cause of acid precipitation?

Back 3

Destruction of the ozone layer is NOT a cause of acid precipitation.

Front 4

What chemcial can produce fragile eggs in carnivourous birds if they feed on organism that have been exposed?

Back 4

Carnivourous birds that fed on organisms exposed to this chemical produced fragile eggs. This chemical is DDT.

Front 5

What is biodiversity?

Back 5

The amount of biological diversity in an area is called biodiversity.

Front 6

What is used to measure biodiversity?

Back 6

The number of species in an area is a measure of biodiversity.

Front 7

What is the biggest threat to biodiversity?

Back 7

The biggest threat to biodiversity is habitat loss.

Front 8

Why does Mexico have more biodiversity than the U.S.?

Back 8

Mexico has more biodiversity than the U.S. because it is warmer (closer to the equator)

Front 9

What is habitat fragmentation?

Back 9

Human development often creates creates small isolated patches of wildlife area. This is known as habitat fragmentation.

Front 10

What are examples problems caused by exotic species?

Back 10

The actions of zebra mussels and sea lamprey in the Great Lakes are examples problems caused by exotic species

Front 11

What can CFC destroy?

Back 11

The use of CFCs can destroy the ozone layer in the upper atmosphere.

Front 12

What is edge effect?

Back 12

The patch of wildlife area may have different climate conditions around its perimeter. This is known as edge effect.

Front 13

What pesticide threatened the brown pelican and the American bald eagle?

Back 13

brown pelican and the American bald eagle were threatened by the use of the pesticide DDT.

Front 14

Explain why biodiversity is important to people.

Back 14

Within the diverse world of living things are many resources for people. These food clothing, material and medical drugs. For many people natural areas also provide beauty, recreation and inspiration.

Front 15

Describe four types of threats to biodiversity?

Back 15

1)Habitat loss -when wildlife areas are converted in areas of human use.
2)Habitat fragmentation-when human activites create wildlife fragments that are isolated from other natural areas.
3)Habitat Degradation- polluting natural areas,
4)Introduction of Exotics-bringing new species to places they never existed before
5)Over hunting or collecting- the capture or killing of too many organisms of a particular species.

Front 16

Why can exotic species be a problem in conservation biology?

Back 16

Exotic species can threaten biodiversity. When a species is released into an area where it has never lived, it may not have enemies such as organisms that eat it or diseases that infect it. Thus the exotic species may grow and reproduce rapidly. The introduced species may out compete natives species for space, food, or other resources. The introduced species may consume native species. The introduced species may altar the habitat of an area. All of these results may threaten the biodiversity of an area.

Front 17

How does habitat fragmentation threaten biodiversity?

Back 17

Human actions may result in habitat fragmentation, the creation of natural areas that are isolated from other natural areas. This creates problems because it restricts the mobility of organisms. This ia a big problem for large predators, which need large areas to satisfy thier nutritional needs. It can also be a problem for migratory organisms. another problem of habitat fragmentation is the edges of the fragment have different conditions than the interior. This is known as edge effect, and it may make the edges an unsuitable habitat for rare species.

Front 18

Give an example of how habitat degradation threatened or threatens biodiversity.

Back 18

Describe how pollution threatened or threatens a species of organisms.
1) The American bald eagle and brown pelician were threated by the use of DDT.
2)Water pollution killing oranisms in coral reefs.

Front 19

Explain the relationship of distance from the equator and biodiversity.

Back 19

If all other conditions are equal, the closer to the equator the more biodiveristy the habitat contains.

Front 20

Why are tropical rain forest so rich in biodiversity?

Back 20

Tropical rain forest are near the equator. They have lots of rain, which ensures lush plant growth and sufficient water from many animals. Finally the vertical stratification of the rain forest--layers of vegetation as you move up from the canopy floor--creates may different niches for the survival of many different organisms.

Front 21

Give an example of an exotic species in Kenya.

Back 21

Salvinia molesta, a floating aquatic plant, first enter Lake Naivasha in Kenya whe a person's fish ponds flooded. The plant quickly grew, chaning the habitat of part of the lake. This is an example of a problem due to EXOTIC SPECIES.

Front 22

What is an example of species that extinct?

Back 22

an example of species that extinct is passenger pigeon.

Front 23

What are examples of habitat degradation?

Back 23

Water and air pollution are examples of habitat degradation?