<p> Abundance of swamp daisies along a belt transect</p><p>Quadrat 1 5 10 15 20 distance No of daisies</p><p>Describe the distribution and abundance of swamp daisies using the five quadrats above and the abiotic factors measured.</p><p>Give possible reasons for the distribution and abundance above.</p><p>Describe tests/experiments you could carry out to determine which of the above parameters is the "limiting factor". </p><p>What other factors could determine the distribution of swamp daisies? Species Diversity</p><p>Some common herbs and other understorey plants found in river red gum forests. The red squares are 1m2 random quadrats. The total area = 12.5m2</p><p>Compare the species diversity for the whole area of the diagram: a. determined by using the three random quadrats; b. determined by doing a total count of the area.</p><p>How would you improve the random quadrat method so you recorded all plant species in the study area? Refer to Figure 10.49, the surface map (aerial view) of a sample plot in an area where eucalypts grow. a Calculate the total surface area covered by species A. What percentage cover is this? How does it compare with species C?</p><p> b How would you classify the area represented by the plot using Spechts classification scheme? c What limitations are there in using one sample plot to represent a larger area such as a forest?</p><p> d Draw a transect profile across XY. What particular information is missing that would be helpful in drawing a more accurate profile? e Describe how the information presented would have been obtained. f Suggest reasons for the difference in distribution of the different species. Capture – Recapture Example 1 5mX5m</p><p>Abundance = number marked Time 1 x number captured Time 2 number marked in recapture Time 2. </p><p>Calculate the estimated population of cockroaches in the above ecosystem.</p><p>Calculate the density of cockroaches in this ecosystem. Mark Recapture Example 2</p><p>To survey beetles on river red gum foliage, a sheet was placed below the tree and the lower branches were shaken. </p><p>Fallen beetles were then collected, marked and released. The process was repeated 24 hours later.</p><p>Calculate the estimated population of beetles in the above tree . Show working</p>