Resource Dynamics And Positive And Negative Interactions Between Plants In Arid Systems
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Resource Dynamics and Positive and Negative Interactions Between Plants in Arid Systems
Author | : Jane Noeleen Prider |
Publisher | : |
Total Pages | : 396 |
Release | : 2002 |
Genre | : Plant competition |
ISBN | : |
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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.
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