10.3 5 Conserving global biodiversity

Question 1

loss of biodiversity result of

Answer 1

deforestation ,farming ,overfishing,building and the introduction of alien species,pollution global warming climate change

Question 2

extinction

Answer 2

permanent loss of all members of a species

Question 3

current extinction rate

Answer 3

much higher than the background extinction rate

Question 4

before species becomes extinct

Answer 4

both population size and genetic diversity falls

Question 5

critically endangered

Answer 5

extremely high risk of extinction in the wild

Question 6

endangered

Answer 6

a very high risk of extinction in the wild

Question 7

vulnerable

Answer 7

facing a high risk of extinction in the wild

Question 8

Red list

Answer 8

list of species endangered and close to extinction

Question 9

Human causes of extinction

Answer 9

habitat destruction and pollution
eating
result of other animals ,plants and diseases introduced by people
climate change

Question 10

CITES

Answer 10

Convention on International Trade in Endangered Species of Wild Fauna and Flora
an international agreement designed to protect endangered animals and plants by regulating trade in both the living organisms and the products made from them

Question 11

Appendix I

Answer 11

threatened with extinction and no trade in wild-collected specimens or their products is allowed e.g. Asian elephants

Question 12

Appendix II

Answer 12

Organisms not yet threatened by extinction but are endangered and could become threatened if not protected
strict trade controls
organisms bred in captivity from appendix treated as members of appendix 11 e.g. African grey parrot

Question 13

Appendix III

Answer 13

Organisms there because a country has asked other CITES to help protect a local population -may be threatened in that country but not globally e.g. two-toed sloth of Costa Rica

Question 14

CITES success stories

Answer 14

banned international ivory trade-poaching levels decreased and elephant numbers in some areas have increased
several turtle species have been brought back from brink of extinction by ban on trade of turtle products

Question 15

Limitations of CITES

Answer 15

CITES deal exclusively with trade no protection of ecosystem or breeding sites
many countries not signed up
strong commercial interests can override scientific need for protection
no legal obligation