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Testing the Shifting Persistence Niche Concept: Plant Resprouting along Gradients of Disturbance

Clarke, Peter J., Bell, Dorothy M. and Lawes, Michael J. (2015). Testing the Shifting Persistence Niche Concept: Plant Resprouting along Gradients of Disturbance. The American Naturalist,185(6):747-755.

Document type: Journal Article
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IRMA ID 75039815xPUB1001
Title Testing the Shifting Persistence Niche Concept: Plant Resprouting along Gradients of Disturbance
Author Clarke, Peter J.
Bell, Dorothy M.
Lawes, Michael J.
Journal Name The American Naturalist
Publication Date 2015
Volume Number 185
Issue Number 6
ISSN 0003-0147   (check CDU catalogue  open catalogue search in new window)
Start Page 747
End Page 755
Total Pages 9
Place of Publication United States
Publisher University of Chicago Press
Field of Research ENVIRONMENTAL SCIENCES
HERDC Category C1 - Journal Article (DIISR)
Abstract Plant resprouting after disturbance confers community resilience because individuals persist through trade-offs in resources for buds versus those required to produce seeds. However, repeated disturbance may deplete bud banks, and population persistence may become increasingly reliant on regeneration from seed. Theory predicts a shift in community assemblage from species with a strategy of persistence by resprouting (persistence niche) to one of regeneration from seed (regeneration niche) as the disturbance frequency increases. We tested, for the first time, the shifting persistence niche concept in a model system at local and regional community scales using a phylogenetically diverse floristic assemblage. Persistence traits of vascular plants were modeled as a function of dry-down frequency in wetlands. Resprouting species occupying the persistence niche were more common in stable wetlands than in those more frequently disturbed by dry downs. The patterns of resprouting species in standing vegetation and in seed banks provide strong support for the shifting persistence niche model involving trade-offs between resprouting (clonality) and sexual reproduction.
Keywords clonality
disturbance
ruderals
semelparity
trade-offs
wetlands
DOI http://dx.doi.org/10.1086/681160   (check subscription with CDU E-Gateway service for CDU Staff and Students  check subscription with CDU E-Gateway in new window)
 
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