Longevity of clonal plants: why it matters and how to measure it
Open Access
- 29 September 2010
- journal article
- review article
- Published by Oxford University Press (OUP) in Annals of Botany
- Vol. 106 (6), 859-870
- https://doi.org/10.1093/aob/mcq191
Abstract
Species' life-history and population dynamics are strongly shaped by the longevity of individuals, but life span is one of the least accessible demographic traits, particularly in clonal plants. Continuous vegetative reproduction of genets enables persistence despite low or no sexual reproduction, affecting genet turnover rates and population stability. Therefore, the longevity of clonal plants is of considerable biological interest, but remains relatively poorly known. Here, we critically review the present knowledge on the longevity of clonal plants and discuss its importance for population persistence. Direct life-span measurements such as growth-ring analysis in woody plants are relatively easy to take, although, for many clonal plants, these methods are not adequate due to the variable growth pattern of ramets and difficult genet identification. Recently, indirect methods have been introduced in which genet size and annual shoot increments are used to estimate genet age. These methods, often based on molecular techniques, allow the investigation of genet size and age structure of whole populations, a crucial issue for understanding their viability and persistence. However, indirect estimates of clonal longevity are impeded because the process of ageing in clonal plants is still poorly understood and because their size and age are not always well correlated. Alternative estimators for genet life span such as somatic mutations have recently been suggested. Empirical knowledge on the longevity of clonal species has increased considerably in the last few years. Maximum age estimates are an indicator of population persistence, but are not sufficient to evaluate turnover rates and the ability of long-lived clonal plants to enhance community stability and ecosystem resilience. In order to understand the dynamics of populations it will be necessary to measure genet size and age structure, not only life spans of single individuals, and to use such data for modelling of genet dynamics.Keywords
This publication has 150 references indexed in Scilit:
- Extra petals in the buttercup (Ranunculus repens) provide a quick method to estimate the age of meadowsAnnals of Botany, 2009
- Dynamics of distribution and performance of ramets constructing genets: a demographic–genetic study in a clonal plant, Convallaria keiskeiAnnals of Botany, 2009
- Clonal dynamics in western North American aspen (Populus tremuloides)Molecular Ecology, 2008
- The Origin of Clonal Diversity and Structure of Populus alba in Sardinia: Evidence from Nuclear and Plastid Microsatellite MarkersAnnals of Botany, 2008
- Ecological responses to recent climate changeNature, 2002
- Grasstrees reveal contrasting fire regimes in eucalypt forest before and after European settlement of southwestern AustraliaForest Ecology and Management, 2001
- AFLP genotyping and fingerprintingTrends in Ecology & Evolution, 1999
- Genet structure and determinants of clonal structure in a temperate deciduous woodland herb,Uvularia perfoliataJournal of Ecology, 1999
- Demography ofBouteloua gracilisin a mixed prairie: analysis of genets and individualsJournal of Ecology, 1999
- Somatic selection in perennial ryegrassHeredity, 1965