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Prider, Jane (Jane Noeleen) Dept. of Environmental Biology 2002 http://hdl.handle.net/2440/21845 "June 2002" Bibliography: leaves 172-198. viii, 198 leaves : ill. ; 30 cm. Proposes that the overall outcome of plant interactions along a temporal gradient of resource availability changes from positive during interpulses to negative during pulses. Examines negative interactions between 4 co-dominant chenopod scrubs in arid Acacia papyrocarpa woodlands. Negative interactions were more intense when conditions were least productive. Positive interactions between seedlings also changed over time, depending on the facilitation mechanism. Plant interactions seem to be most intense at the beginning of interpulses when plants are competing for diminishing water, or survivorship is enhanced in the favorable microsites provided by other plants. Later in the interpulse, interactions become less intense as conditions become more stressful and therefore survivorship and growth are affected more by abiotic conditions than plant interactions. Thesis (Ph.D.)--University of Adelaide, Dept. of Environmental Biology, 2002 151877 bytes application/pdf en Plant competition. Plant ecophysiology. Arid regions ecology. Resource dynamics and positive and negative interactions between plants in arid systems / Jane Prider. Thesis This electronic version is made publicly available by the University of Adelaide in accordance with its open access policy for student theses. Copyright in this thesis remains with the author. This thesis may incorporate third party material which has been used by the author pursuant to Fair Dealing exception. If you are the author of this thesis and do not wish it to be made publicly available or If you are the owner of any included third party copyright material you wish to be removed from this electronic version, please complete the take down form located at: http://www.adelaide.edu.au/legals.open.access