Use the following link to answer the following questions.

1. What is biodiversity?

2. Why is biodiversity important?

3. How can we maintain biodiversity?

https://www.youtube.com/watch?v=QAEE3HN1RM0

Any help needed, please email me on s.mayor@bishopchalloner.bham.sch.uk

Biodiversity and Sampling: Part 1

Lesson Objectives

1. To describe why biodiversity is important.

2. To explain how we can measure biodiversity in terms of habitat, species and genetic biodiversity.

3. To evaluate the differences between habitat, species and genetic biodiversity.

Week beginning: 20th of April 2020C/W

List the reasons why biodiversity is important

Define the terms; habitat, species and genetic biodiversity.

List the differences between habitat, species and genetic biodiversity.

Success Criteria

• The following PowerPoint presentation and tasks should take you approximately 1 hour to complete.

• This is part 1 of the work set in week 3 (week beginning 20th

of April) and should be completed by 24th of April.

Any help needed, please email me on s.mayor@bishopchalloner.bham.sch.uk

Pages 262-263 in the Year 1 Biology textbook

Key definitions!• Biodiversity is the variety of living organisms present in the

area.

• Biodiversity includes; plants, animals, fungi and other living things.

Why is biodiversity so important?

Why is biodiversity so important?• Essential in maintaining a balanced ecosystem for all

organisms

• All species are interconnected - what does this mean?

1. Which region has the greatest biodiversity and which has the smallest biodiversity?

2. Why do you think this is?

Tropical regions = greatest level of biodiversity due to warmer climatesArctic = smallest level of biodiversity

General trend ; the closer you are to the equator the greater the level of

biodiversity

Why do we measure biodiversity?• Gives scientists an indication of number of species

• Conservation

• Scientists can measure any effect of change on the environment, e.g. climate change, human influence , disease

EIA – Environmental Impact Assessment• For any new development e.g. road, nature reserve an EIA has

to be taken place.

• This attempts to assess the positive and negative impacts of a project on the biodiversity in that area.

Task 1: EIA – Environmental Impact Assessment Questions.

Use the resource called ‘Case Study Colombia Mining’ to answer the following questions.1. What is the purpose of the project?2. What does the screening process involve?3. What did the impact assessment find out about the ecosystem?4. What are the potential biotic factors affected by the mine?5. What are the potential abiotic factors affected by the mine?6. How are they going to reduce the effects of the biotic factors being affected? Hint - look

at the mitigation measures table.7. Name 3 biotic plans that the project will have in place.8. Name 3 abiotic plans that the project will have in place.

Task 2: For the following slides from 11 – 20, make notes on the three levels of how Biodiversity can be measured and studied at the different levels. These include:

a. Habitat diversityb. Species diversityc. Genetic diversity

Habitat Biodiversity

• Refers to the number of different habitats found within the area.

• Each habitat can support a number of different species.

• In general the greater the habitat biodiversity, the greater the species biodiversity will be within that area

Habitat Biodiversity

• Example: In the UK has a variety of habitats fro meadows, woodlands, streams and sand dunes = Large habitat biodiversity

• Antarctica: covered in ice sheets = low habitat biodiversity = few species

• Countryside can be described as habitat rich, as it is might have a river, hedgerows, grassland etc = more species

• In a ploughed field = single uniform habitat

Biodiversity can measured and studied at different levels

a. Habitat diversity

b. Species diversity

c. Genetic diversity

Species biodiversity• Has two different components;

1. Species richness; the number of different species living in a particular area.

2. Species evenness; a comparison of the number of individuals of each species living in a community (community is all the populations of living organisms in a particular habitat.

Measuring biodiversity

Species richness: the number of species present in a habitat.

The more species present, the richer the habitat.

• Disadvantage of this measure: doesn’t take into account the number of individuals in each species.

• So we have species evenness.

Measuring biodiversity

Species evenness: Is a measure of the relative numbers or abundance of individuals in each species.

• A more even habitat is more likely to be a more diverse habitat than if one species outnumbers all the others.

• We can measure abundance in plants as percentage cover, rather than the number of individuals.

Species biodiversity• An area can differ in species biodiversity even if it has the same number of species.

• Example ; a cornfield and a grass meadow contains 20 species each.

- Cornfield = corn will make up 95% of the community and 5% will be weed plants, insects, mice and birds.

- Meadow = has a balanced population of species

Biodiversity can measured and studied at different levels

a. Habitat diversity

b. Species diversity

c. Genetic diversity

Genetic Biodiversity

• Is the variety of genes that make up a species

• Humans: 25,000 genes

• Flowering plants ; 400 000 genes

• Many of the genes are the same for all individuals within a species, BUT for many genes, there are different versions of the genes ( called…..?)

• Dogs are a good example

• The greater the genetic biodiversity within a species, allows for better adaptation to a changing environment, this will help individuals be resistant to disease.

Biodiversity can measured and studied at different levels

a. Habitat diversity

b. Species diversity

c. Genetic diversity

Reminder this what you should have completed: Task 2: For the following slides from 11 – 20, make notes on the three levels of how Biodiversity can be measured and studied at the different levels. These include:

a. Habitat diversityb. Species diversityc. Genetic diversity

Task 3: Make a glossary for the following terms;

a. Habitat diversityb. Species diversityc. Genetic diversityd. EIAe. Species evennessf. Species richness

Task 4: Summary Questions on page 263.

See answers on the next slide

Task 4: Summary Questions on page 263.

Pages 262-263 in the Year 1 Biology textbook