# biodiveristy

Watch
Which of the following is the correct definition for the term 'biodiversity'? -

The variety of different habitats in an ecosystem

The variety of different species in an ecosystem

The variety of different communities in an ecosystem

The variety of different niches in an ecosystem

Im not sure which of the ones it could be?

The variety of different habitats in an ecosystem

The variety of different species in an ecosystem

The variety of different communities in an ecosystem

The variety of different niches in an ecosystem

Im not sure which of the ones it could be?

0

reply

Report

#3

(Original post by

Which of the following is the correct definition for the term 'biodiversity'? -

The variety of different habitats in an ecosystem

The variety of different species in an ecosystem

The variety of different communities in an ecosystem

The variety of different niches in an ecosystem

Im not sure which of the ones it could be?

**noodlestopshop**)Which of the following is the correct definition for the term 'biodiversity'? -

The variety of different habitats in an ecosystem

The variety of different species in an ecosystem

The variety of different communities in an ecosystem

The variety of different niches in an ecosystem

Im not sure which of the ones it could be?

0

reply

(Original post by

It is the variety of different species in an ecosystem as biodiversity looks at the different living organisms present in an area

**MahnoorN**)It is the variety of different species in an ecosystem as biodiversity looks at the different living organisms present in an area

0

reply

Report

#5

(Original post by

Thankyou, is there any chance if you know if this is correct?

**noodlestopshop**)Thankyou, is there any chance if you know if this is correct?

__quadrat__. Step 7 is also wrong as you are looking at the total

__population__in the location within the ecosystem. Other than that, everything is right.

0

reply

(Original post by

Question 1 is right. Question 2's step 3 is wrong as it is asking what are you placing alongside the tape measure at the randomly generated coordinates so it would be the

**MahnoorN**)Question 1 is right. Question 2's step 3 is wrong as it is asking what are you placing alongside the tape measure at the randomly generated coordinates so it would be the

__quadrat__. Step 7 is also wrong as you are looking at the total__population__in the location within the ecosystem. Other than that, everything is right.
0

reply

Sorry for so many questions, is anyone able to help with this one?

I have this table

Then have to answer the following questions'

"Using data from Table 1 above, calculate the mean number of dandelions per m2 in location A" =

"Using data from Table 1 above, calculate the mean number of dandelions per m2 in location B (give your answer to 1 decimal place)." =

"What should Dakota conclude from her investigation into the population of dandelions in location A and location B?

The population of dandelions was lower in Location B

The population of dandelions was the same in location A and B

"How could Dakota improve her investigation?

Decrease the number of quadrats so that the result is more representative

Decrease the number of quadrats so that the result is less biased

Increase the number of quadrats so that the result is less biased

I have this table

Then have to answer the following questions'

"Using data from Table 1 above, calculate the mean number of dandelions per m2 in location A" =

**3**"Using data from Table 1 above, calculate the mean number of dandelions per m2 in location B (give your answer to 1 decimal place)." =

**9.2**"What should Dakota conclude from her investigation into the population of dandelions in location A and location B?

The population of dandelions was lower in Location B

The population of dandelions was the same in location A and B

**The population of dandelions was lower in Location A < I chose this answer"**"How could Dakota improve her investigation?

Decrease the number of quadrats so that the result is more representative

Decrease the number of quadrats so that the result is less biased

Increase the number of quadrats so that the result is less biased

**Increase the number of quadrats so that the result is more representative"**
Last edited by noodlestopshop; 1 month ago

1

reply

Report

#9

(Original post by

Sorry for so many questions, is anyone able to help with this one?

I have this table

Then have to answer the following questions'

"Using data from Table 1 above, calculate the mean number of dandelions per m2 in location A"

"Using data from Table 1 above, calculate the mean number of dandelions per m2 in location B (give your answer to 1 decimal place)."

"What should Dakota conclude from her investigation into the population of dandelions in location A and location B?

The population of dandelions was lower in Location B

The population of dandelions was the same in location A and B

The population of dandelions was lower in Location A < I chose this answer"

"How could Dakota improve her investigation?

Decrease the number of quadrats so that the result is more representative

Decrease the number of quadrats so that the result is less biased

Increase the number of quadrats so that the result is less biased

Increase the number of quadrats so that the result is more representative"

**noodlestopshop**)Sorry for so many questions, is anyone able to help with this one?

I have this table

Then have to answer the following questions'

"Using data from Table 1 above, calculate the mean number of dandelions per m2 in location A"

"Using data from Table 1 above, calculate the mean number of dandelions per m2 in location B (give your answer to 1 decimal place)."

"What should Dakota conclude from her investigation into the population of dandelions in location A and location B?

The population of dandelions was lower in Location B

The population of dandelions was the same in location A and B

The population of dandelions was lower in Location A < I chose this answer"

"How could Dakota improve her investigation?

Decrease the number of quadrats so that the result is more representative

Decrease the number of quadrats so that the result is less biased

Increase the number of quadrats so that the result is less biased

Increase the number of quadrats so that the result is more representative"

0

reply

Report

#10

**noodlestopshop**)

Sorry for so many questions, is anyone able to help with this one?

I have this table

Then have to answer the following questions'

"Using data from Table 1 above, calculate the mean number of dandelions per m2 in location A"

"Using data from Table 1 above, calculate the mean number of dandelions per m2 in location B (give your answer to 1 decimal place)."

"What should Dakota conclude from her investigation into the population of dandelions in location A and location B?

The population of dandelions was lower in Location B

The population of dandelions was the same in location A and B

The population of dandelions was lower in Location A < I chose this answer"

"How could Dakota improve her investigation?

Decrease the number of quadrats so that the result is more representative

Decrease the number of quadrats so that the result is less biased

Increase the number of quadrats so that the result is less biased

Increase the number of quadrats so that the result is more representative"

By decreasing the number of quadrats, you will have a smaller set of data, there will be a higher chance of anomaly affecting the mean number, so it will be less representative and has a higher possibility of researcher bias.

By increasing the number of quadrats, you will have a larger set of data, so there is a lower chance of the anomaly/outlier affecting the mean number, making it more representative and has a lower possibility of researcher bias.

Using the information I provided, which statement do you think is most suitable on how to improve the investigation

0

reply

(Original post by

For improving the investigation you look at the effect of changing the number of quadrats.

By decreasing the number of quadrats, you will have a smaller set of data, there will be a higher chance of anomaly affecting the mean number, so it will be less representative and has a higher possibility of researcher bias.

By increasing the number of quadrats, you will have a larger set of data, so there is a lower chance of the anomaly/outlier affecting the mean number, making it more representative and has a lower possibility of researcher bias.

Using the information I provided, which statement do you think is most suitable on how to improve the investigation

**MahnoorN**)For improving the investigation you look at the effect of changing the number of quadrats.

By decreasing the number of quadrats, you will have a smaller set of data, there will be a higher chance of anomaly affecting the mean number, so it will be less representative and has a higher possibility of researcher bias.

By increasing the number of quadrats, you will have a larger set of data, so there is a lower chance of the anomaly/outlier affecting the mean number, making it more representative and has a lower possibility of researcher bias.

Using the information I provided, which statement do you think is most suitable on how to improve the investigation

0

reply

Report

#12

(Original post by

Thank you, I just edited my post to add some answers, are they ok?

**noodlestopshop**)Thank you, I just edited my post to add some answers, are they ok?

0

reply

Report

#13

**noodlestopshop**)

Thank you, I just edited my post to add some answers, are they ok?

0

reply

(Original post by

I hope you understood all the explanations well. If you still don’t understand something don’t hesitate to ask. Also well done

**MahnoorN**)I hope you understood all the explanations well. If you still don’t understand something don’t hesitate to ask. Also well done

The questions are

"A 1200 m2 field was randomly sampled for buttercups using a quadrat with an area of 1 m2. A mean of 3 buttercups were found per quadrat. Estimate the total population of buttercups in the field."

"A 1500 m2 beach was randomly sampled for sea kale using a quadrat with an area of 0.5 m2. A mean of 1.2 sea kale were found per quadrat. Estimate the total population of sea kale on the beach."

"A 1000 m2 woodland was randomly sampled for anemones using a quadrat with an area of 0.25 m2. A mean of 3.4 anemones were found per quadrat. Estimate the total population of anemones in the woodland."

Is there any chance you could tell me what the math equation I would have to do?

0

reply

Report

#15

(Original post by

Thankyou! I have questions which are similar but I'm not sure of the math

The questions are

"A 1200 m2 field was randomly sampled for buttercups using a quadrat with an area of 1 m2. A mean of 3 buttercups were found per quadrat. Estimate the total population of buttercups in the field."

"A 1500 m2 beach was randomly sampled for sea kale using a quadrat with an area of 0.5 m2. A mean of 1.2 sea kale were found per quadrat. Estimate the total population of sea kale on the beach."

"A 1000 m2 woodland was randomly sampled for anemones using a quadrat with an area of 0.25 m2. A mean of 3.4 anemones were found per quadrat. Estimate the total population of anemones in the woodland."

Is there any chance you could tell me what the math equation I would have to do?

**noodlestopshop**)Thankyou! I have questions which are similar but I'm not sure of the math

The questions are

"A 1200 m2 field was randomly sampled for buttercups using a quadrat with an area of 1 m2. A mean of 3 buttercups were found per quadrat. Estimate the total population of buttercups in the field."

"A 1500 m2 beach was randomly sampled for sea kale using a quadrat with an area of 0.5 m2. A mean of 1.2 sea kale were found per quadrat. Estimate the total population of sea kale on the beach."

"A 1000 m2 woodland was randomly sampled for anemones using a quadrat with an area of 0.25 m2. A mean of 3.4 anemones were found per quadrat. Estimate the total population of anemones in the woodland."

Is there any chance you could tell me what the math equation I would have to do?

Population size = Number of organisms found in sample x (total area/sample area)

The number of organisms found is the sample is the number of organisms counted in one quadrat (this is usually a mean number). The sample area is the area which the quadrat covers and the total area is the whole area from which the samples are being taken from. Remember to check that the sample area and the total area have the same units.

0

reply

Report

#16

**noodlestopshop**)

Thankyou! I have questions which are similar but I'm not sure of the math

The questions are

"A 1200 m2 field was randomly sampled for buttercups using a quadrat with an area of 1 m2. A mean of 3 buttercups were found per quadrat. Estimate the total population of buttercups in the field."

"A 1500 m2 beach was randomly sampled for sea kale using a quadrat with an area of 0.5 m2. A mean of 1.2 sea kale were found per quadrat. Estimate the total population of sea kale on the beach."

"A 1000 m2 woodland was randomly sampled for anemones using a quadrat with an area of 0.25 m2. A mean of 3.4 anemones were found per quadrat. Estimate the total population of anemones in the woodland."

Is there any chance you could tell me what the math equation I would have to do?

0

reply

(Original post by

In order to work out population, you use a formula to calculate it. The formula is:

Population size = Number of organisms found in sample x (total area/sample area)

The number of organisms found is the sample is the number of organisms counted in one quadrat (this is usually a mean number). The sample area is the area which the quadrat covers and the total area is the whole area from which the samples are being taken from. Remember to check that the sample area and the total area have the same units.

**MahnoorN**)In order to work out population, you use a formula to calculate it. The formula is:

Population size = Number of organisms found in sample x (total area/sample area)

The number of organisms found is the sample is the number of organisms counted in one quadrat (this is usually a mean number). The sample area is the area which the quadrat covers and the total area is the whole area from which the samples are being taken from. Remember to check that the sample area and the total area have the same units.

I did 3x1200=3600, am I following the steps incorrectly?

0

reply

Report

#18

(Original post by

For the "A 1200 m2 field was randomly sampled for buttercups using a quadrat with an area of 1 m2. A mean of 3 buttercups were found per quadrat. Estimate the total population of buttercups in the field."

I did 3x1200=3600, am I following the steps incorrectly?

**noodlestopshop**)For the "A 1200 m2 field was randomly sampled for buttercups using a quadrat with an area of 1 m2. A mean of 3 buttercups were found per quadrat. Estimate the total population of buttercups in the field."

I did 3x1200=3600, am I following the steps incorrectly?

0

reply

(Original post by

Don’t worry, you followed it correctly and it’s right

**MahnoorN**)Don’t worry, you followed it correctly and it’s right

for the

A 1500 m2 beach was randomly sampled for sea kale using a quadrat with an area of 0.5 m2. A mean of 1.2 sea kale was found per quadrat. Estimate the total population of sea kale on the beach.

I did 1.2x1500=1800

But since it says estimate doesnt that mean I need to round the 1.2 to 1 and do 1x1500=1500 ?

and then for the

A 1000 m2 woodland was randomly sampled for anemones using a quadrat with an area of 0.25 m2. A mean of 3.4 anemones were found per quadrat. Estimate the total population of anemones in the woodland.

I did 3.4x1000=3400

but yet again am I meant to round the 3.4 down so that it = 300?

0

reply

Report

#20

(Original post by

Yay

for the

A 1500 m2 beach was randomly sampled for sea kale using a quadrat with an area of 0.5 m2. A mean of 1.2 sea kale was found per quadrat. Estimate the total population of sea kale on the beach.

I did 1.2x1500=1800

But since it says estimate doesnt that mean I need to round the 1.2 to 1 and do 1x1500=1500 ?

and then for the

A 1000 m2 woodland was randomly sampled for anemones using a quadrat with an area of 0.25 m2. A mean of 3.4 anemones were found per quadrat. Estimate the total population of anemones in the woodland.

I did 3.4x1000=3400

but yet again am I meant to round the 3.4 down so that it = 300?

**noodlestopshop**)Yay

for the

A 1500 m2 beach was randomly sampled for sea kale using a quadrat with an area of 0.5 m2. A mean of 1.2 sea kale was found per quadrat. Estimate the total population of sea kale on the beach.

I did 1.2x1500=1800

But since it says estimate doesnt that mean I need to round the 1.2 to 1 and do 1x1500=1500 ?

and then for the

A 1000 m2 woodland was randomly sampled for anemones using a quadrat with an area of 0.25 m2. A mean of 3.4 anemones were found per quadrat. Estimate the total population of anemones in the woodland.

I did 3.4x1000=3400

but yet again am I meant to round the 3.4 down so that it = 300?

You made a minor mistake but I think it may be my fault as I was not clear with the '/' in the formula

Population size = Number of organisms found in sample x (total area

**)**

__divided by the__sample areaFor the previous question which you got correct, the sample area was 1 so it did not affect the value.

However for these questions, the sample area is no longer 1 so it affects the population size

e.g. for the sea kale question it would be 1.2 x (1500 divided by 0.5)

If you still don't understand please do let me know and let me know how you got on

0

reply

X

### Quick Reply

Back

to top

to top