Lesson 7: Environmental Change/Biodiversity

Question 1

What DIFFERENT environmntal changes could affect the distribution of a species in an ecosystem?

3 main environmental changes

Answer 1

1.) Temperature
2.) Availability of water.
3.) Composition of atmospheric gases.

Question 2

What are the 3 different types of changes of the environment of an ecosystem?

Answer 2

1.) Seasonal.
2.) Geographical
3.) Caused by human interraction.

Question 3

What is biodiversity?

Answer 3

• Biodiversity is the variety of all the different species of organisms on
  earth, or within an ecosystem.

Question 4

Why is a great biodiversity important?

Answer 4

• Ensures the stability of ecosystems by reducing the dependence of one species on another for food, shelter and the maintenance of the physical environment.

Question 5

What 3 things do organisms/ plants rely on other organisms/ plants (within an ecosystem) for?

Answer 5

1.) Food.
2.) Shelter
3.) Maintenance of the physical environment.

Question 6

What does the future of the human species on Earth rely on?

Answer 6

• Relies on us maintaining a good level of biodiversity.

Question 7

What has mainly been reducing biodiversity?

Answer 7

• Human activities

Question 8

True or False

People started to try and stop reduction of biodiversity a long time ago.

Answer 8

• False.
• Only recently have measures been put in place to try and decrease the reduction of biodiversity.

Question 9

Which 2 main groups of people have put in place programmes to reduce the negative effects humans have on biodiversity and ecosystems?

Answer 9

1.) Scientists.
2.) Concerned citizens.

Question 10

What 5 main programmes have scientists/ concerned citizens put in place to reduce negative effect of humans on biodiversity?

Answer 10

1.) Breeding programmes for endagered species.
2.) Protection and regeneration of rare habitats.
3.) reintroduction of field margins and hedgrows in agricultural areas where farmers grow only one type of crop.
4.) reduction of deforestation and carbon dioxide emissions by some
governments
5.) recycling resources rather than dumping waste in landfill.

Question 11

Why have field margins and hedgerows been reintroduced in agricultural areas?

Answer 11

• To allow for many species of plant and animal to live in hedgerows/ field margins as not many species of plant/ animal can live in the agriculutural space where only one crop is being grown.

Question 12

What is a major human activity which leads to reduced biodiversity in an ecosystem?

Answer 12

• Deforestation.