17.6 maintaining biodiversity

Question 1

breeding programmes for endangered species advantages

Answer 1

can restore an endangered species to a sustainable population

Question 2

breeding programmes for endangered species disadvantages

Answer 2

• many rare plants and animals do not reproduce easily or fast
• must avoid inbreeding
• the habitat that the organisms need to survive has also been lost

Question 3

examples of rare habitats that are threatened and are now being protected

Answer 3

Coral reefs, mangroves, heathlands

Question 4

How do you protect coral reefs

Answer 4

• co2 emissions and global warming must be tackled
• raised temperatures and decreased pH levels are major threats

Question 5

Why are mangroves important

Answer 5

Vital sites for young fish to develop

Question 6

What are mangroves threatened by

Answer 6

Easily destroyed by too much or too little water or changes in salinity

Question 7

How are people reestablishing lost heathland

Answer 7

• removing trees
• reversing drainage
• allowing cows and ponies to graze wild

Question 8

What has the removal of hedge grows led to

Answer 8

• removed a wide variety of plants, birds, insects and mammals
• led to soil erosion and a reduction in soil fertility

Question 9

How are farmers increasing the biodiversity of the countryside

Answer 9

• replanting hedge grows
• leaving wildflower margins around the edges of their fields

Question 10

How are deforestation and co2 emissions being reduced

Answer 10

• rainforests and cloud forests are protected
• farm land produced by felling forests has been bought and allowed to return to forest over time
• tourists pay to visit habitats and see biodiversity
• gov working with transport and electricity generation industries
• co2 emissions of new cars falling as a result of more efficient engines

Question 11

How does waste placed in landfills affect biodiversity

Answer 11

By using land and producing pollution

Question 12

How are landfills being reduced

Answer 12

• recycle as much as possible (paper, glass, plastic, metal)
• recycle organic waste as compost or in methane generators
• introduce taxes on putting material in landfill