(Specific focus of aim) The use of a funnel and gate system via a trench has been examined in detail (Methods) using a groundwater modelling option of the FLAC program.
(Methods) The modelling involved an analysis of the effect of changing the lengths of the walls and gate, varying the permeability, and varying the number of gates.
(Broad purpose of study) An understanding of the effects of fluoride on the reproductive processes of plant species within a forest community may help predict changes within the community following an increase in atmospheric fluoride arising from industrial sources.(Narrowing of purpose of study) This study investigates the effects of increased atmospheric fluoride emissions from an aluminium smelter, on the reproductive processes of three native species, Banksia aemula, Bossiaea heterophylla and Actinotus helianthi.
Elaboration of purpose Attention has also been paid to the soil seed reserve as an important resource for the replacement of adult plants within the community.(Results) For Banksia aemula the study found that the reproduction of this fluoride-sensitive species may be affected in the close vicinity of the smelter…
These pages show two examples of typical abstracts from honours theses.
Notice that the stages of the abstracts have been labelled, so that you can see the function of each sentence or part-sentence.(Significance of results 2) The soil seed reserve study indicated that the seed reserve was very small in all areas.This would have several negative impacts on the natural regeneration of the area in the event of the closure of the smelter…(Future research) Further research is recommended to assess the biochemical pathways for both the vegetative and reproductive processes and the mechanisms of the pollination of this important species…1996 p.i) * This is the aim of the research, but it is not very clearly stated.It might be better if the aim was made more explicit.(Narrowing statement) One such technique is the method that involves the use of permeable treatment walls.(Elaboration) These methods use a reactive medium such as iron to remediate contaminated groundwater.For the two ground layer species the study found that the fluoride may be affecting the Bossiaea heterophylla but having no discernible or very little effect on the Actinotus helianthi.**(Significance of results 1) The implications of these results for the forest community are that sensitive native species such as the long-lived Banksia aemula and Bossiaea heterophylla will be removed from the plant community close to the smelter.This will reduce the resources they provide to the existing ecosystem but will, however, free more resources for the more resistant opportunist species such as Actinotus helianthi as well as the many introduced species.Note: This abstract is referred to as an Executive Summary (original 2 pages)(Background statement) No other form of environmental pollution has had as widespread detrimental effect on the growth and reproductive capacity of plants as air pollution.(Narrowing statement) Fluorides have long been recognized as highly toxic and research has shown that they are the most phytotoxic of all air pollutants.