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Título

Life span correlates with population dynamics in perennial herbaceous plants

AutorGarcía González, María Begoña ; Picó, F. Xavier ; Ehrlén, Johan
Palabras clavedemography
elasticity
life-cycle components
life history evolution
matrix models
perennial herbs
population growth rate
temporal variability
Fecha de publicaciónfeb-2008
EditorBotanical Society of America
CitaciónAmerican Journal of Botany, 95(2): 258–262. 2008.
ResumenSurvival and fecundity are basic components of demography and therefore have a strong influence on population dynamics. These two key parameters and their relationship are crucial to understand the evolution of life histories. It remains, however, to be empirically established how life span, fecundity, and population dynamics are linked in different organism groups. We conducted a comparative study based on demographic data sets of 55 populations of 23 perennial herbs for which structured demographic models and among-year natural variation in demographic attributes were available. Life span (from 4 to 128 yr old), estimated by using an algorithm, was inversely correlated with the deviance of the population growth rate from equilibrium as well as with among-year population fluctuations. Temporal variability was greater for short-lived species than for the long-lived ones because fecundity was more variable than survival and relatively more important for population dynamics for the short-lived species. The relationship between life span and population stability suggests that selection for longevity may have played an important role in the life history evolution of plants because of its ability to buffer temporal fluctuations in population size
Versión del editorhttp://dx.doi.org/10.3732/ajb.95.2.258
URIhttp://hdl.handle.net/10261/51632
DOI10.3732/ajb.95.2.258
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