Ecology

Question 1

Describe how quadrants should be used to estimate the number of dandelion plans in a field. [4]

Answer 1

• Placed RANDOMLY
• Sufficient number of quadrants used
• COUNT dandelions in each quadrants accepting ones that are MORE THAN HALF IN.
• Use MEAN number of dandelions, AREA OF QUADRANT and AREA OF FIELD to estimate population.

Question 2

Suggest 4 factors to why dandelions may not grow well in a grassy area.

Answer 2

Competition for:

• light (energy for photosynthesis)
• water (for photosynthesis)
• space (to grow bigger)
• mineral ions (for growth)