Chapter 40- Preserving Biodiversity

Question 1

Main causes of the loss of biodiversity

Answer 1

Habitat loss
Pollution
Global climate change
Invasive species
Overexploitation

Question 2

Biodiversity

Answer 2

Variety of life on earth

Question 3

Habitat loss

Answer 3

Farming, deforestation and urbanization shrink earths ecosystems

Especially a concern for tropical rain forests and coral reefs which are rich in species diversity

Redirection of H2O for human or recreational purposes

Question 4

Habitat fragmentation

Answer 4

Prevents access to full range of an organisms habitat

Occurs when a barrier forms within a habitat

Question 5

Pollution

Answer 5

Any chemical, physical or biological change in the environment that harms living organisms

Water pollution (sewage, heavy metals, fertilizers)

Air pollution (smog, acid deposition)

Question 6

Global climate change

Answer 6

Greenhouse effect (natural) CO2 and other gases prevent heat from escaping the atmosphere- raises earths temperature

Human activity increases amt of gases thus increasing the global temp

Question 7

Invasive species

Answer 7

Non-native members of a community

Disrupts balance of ecosystem

Food web interactions are changed

May directly compete with or prey upon native species

Question 8

Overexploitation

Answer 8

Harvesting species faster than it can reproduce

Overhunting (trade, sport, food)

Over-harvesting marine organisms