B18 - Biodiversity & Ecosystems

Question 1

Define biodiversity.

Answer 1

variety of all diff. species of orgnsms on Earth or in specific ecosystem

Question 2

What does high biodiversity ensure?

Answer 2

stability of ecosystem

Question 3

How does recycling resources maintain biodiversity?

Answer 3

landfill sites reduce biodiversity

Question 4

How do breeding programmes maintain biodiversity?

Answer 4

restore endngrd species -> pplttn

Question 5

How has the protection & regeneration of rare habitats maintain biodiversity?

Answer 5

species living in them are no longer under threat

Question 6

How has the reintroduction of field margins & hedgerows maintained biodiversity?

Answer 6

high levels of biodiversity in field margins & hedgrows

Question 7

How has reduction of deforestation & carbon dioxide emissions maintained biodiversity?

Answer 7

govs. establishes national parks to reduce deforestation -> protect species
govs. uses renewable energy sources -> redcue global warming

Question 8

What is an example of a rare habitat?

Answer 8

coral reefs

Question 9

How does the increasing human population affect water pollution?

Answer 9

H2O polluted by untreated sewage, fertilisers, toxic chmcls

Question 10

How does the increasing human population affect air pollution?

Answer 10

more fuels burnt = harmful gases eg. sulfur dioxide -> atmosphere
& can reduce biodiversity

Question 11

What can sulfur dioxide in the atmosphere cause?

Answer 11

acid rain

Question 12

How does the increasing human population affect land pollution?

Answer 12

large amount of waste produced & landfill sites reduce biodiversity
increase in landfill= toxic chemicals from industry -> polluted soil

Question 13

What human activities reduce biodiversity?

Answer 13

air, land & water pollution