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University of Adelaide (2002)

Resource dynamics and positive and negative interactions between plants in arid systems

Prider, Jane Noeleen

Titre : Resource dynamics and positive and negative interactions between plants in arid systems

Auteur : Prider, Jane Noeleen.

Université de soutenance : University of Adelaide

Grade : Doctor of Philosophy (Ph.D.) 2002

Résumé
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.

Présentation (National Library of Australia)

Version intégrale (10,3 Mb)

Page publiée le 25 mars 2006, mise à jour le 3 juillet 2017