Key Features of a Discussion or Conclusion Chapter

Topic: The effects of Fluoride on the reproduction of three native Australian plant Species (School of Geography)

The sentences in Column 1 are indicative of the writing of a combined Discussion / Conclusions chapter. Key features of a Discussion / Conclusion chapter are provided in Column 2. Match each of the sentences in Column 1 with the key features of a discussion in Column 2, and then click the Check button.

A. In some samples from close to the smelter there has been a tenfold increase in the amount of soluble fluoride. This may be due to soluble particulate emissions, such as cryolite, or as a result of litter decomposition (Murray, 1981b)... However, the total fluoride levels in the recent samples have not increased significantly overtime (Ryan, 1992).  
     
B. If the soils of the Tomago sandbeds retain a high percentage of the increased fluoride ... it would then remain in the soil for many years. This could severely alter the soil biology... It may also lead to changes in the ... The potential for regeneration of the native vegetation communities would [then] depend on...  
     
C. The potential for regeneration of native vegetation communities ...would depend on the ability of the soil to maintain their growth. If the soils are altered permanently ... a changed plant community may occur after the closure of the smelter... there could be a reduction in species richness and some species may become locally extinct.  
     
D. The cones in the high fluoride sites have shown a slight decrease in length over the last four years. This trend may continue ...given increases in gaseous and particulate fluoride emissions from the new and extended smelter potlines.  
     
E. Further research looking at the impact of both individual and combined disturbances may help determine whether the combined effects of fluoride with other disturbances are cumulative or synergistic. This may help in the management of areas with multiple disturbances such as Tomago.  
     
F. The results for the forest community indicate that sensitive native species such as long lived Banksia aemula and Bossiaea hyterophylla will be removed from the plant community close to the smelter. This will reduce the resources they provide to the existing ecosystem...  
     
G. The Banksia aemula plants near the smelter have a larger concentration of foliar fluoride than plants growing further away. Whether this is affecting the physiological and biochemical processes of the plant (which in turn may indirectly affect the reproductive potential of the plants) or the increased fluoride in the atmosphere is directly affecting the reproductive mechanisms is difficult to ascertain from this study.  

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