title: A simple model for the influence of habitat resource availability on lateral clonal spread.
abstract: Plant clonal spread is ubiquitous and of great interest, owing both to its key role in plant community assembly and its suitability for plant behaviour research. However, mechanisms that govern spreading distance are not well known. Here we link spacer costs and below-ground competition in a simple model of growth in a homogeneous below-ground environment, in which optimal distance between ramets is based on minimizing the sum of these costs. Using this model, we predict a high prevalence of clonal growth that does not employ spacers in resource-poor environments and a nonlinear increase in spreading distance in response to increasing below-ground resource availability. Analysis of database data on clonal growth in relationship to below-ground resource availability revealed that patterns of the spread based on stolons is compatible with the model's predictions. As expected, model prediction failed for rhizomatous species, where spacer sizes are likely to be selected mainly to play roles other than spread. The model's simplicity makes it useful as a null model in testing hypotheses about the effects of environmental heterogeneity on clonal spread.
authors.affiliation: Faculty of Science, Department of Botany, Charles University in Prague, Albertov 6, 12843 Prague, Czech Republic martin.weiser@natur.cuni.cz.
authors.forename: Martin
authors.identifier: http://orcid.org/0000-0001-7375-5963
authors.initials: M
authors.lastname: Weiser
authors.affiliation: Faculty of Science, Department of Botany, Charles University in Prague, Albertov 6, 12843 Prague, Czech Republic.
authors.forename: Jan
authors.initials: J
authors.lastname: Smyčka
mesh_terms: D017753:Ecosystem; D008954:Models, Biological; D063245:Plant Development; D018521:Plant Physiological Phenomena; D011157:Population Dynamics; D027343:Rhizome / Q000254:growth & development / Q000502:physiology*; D012987:Soil
chemical_list: D012987:Soil
keywords: below-ground resource availability; clonal growth; clonal plants; lateral spread; model; self-generated heterogeneity
references.citation: Proc Natl Acad Sci U S A. 2004 Mar 16;101(11):3863-7
references.pmid: 15004281
references.citation: Proc Biol Sci. 2007 Apr 7;274(1612):929-34
references.pmid: 17251098
references.citation: New Phytol. 2007;176(3):644-54
references.pmid: 17850258
references.citation: Ann Bot. 2008 Oct;102(4):571-7
references.pmid: 18621966
references.citation: Trends Ecol Evol. 1997 Oct;12(10):390-4
references.pmid: 21238121
references.citation: PLoS One. 2012;7(6):e38288
references.pmid: 22675539
references.citation: Oecologia. 2013 Feb;171(2):317-27
references.pmid: 22915332
references.citation: Oecologia. 1997 May;110(4):478-486
references.pmid: 28307238
references.citation: Oecologia. 1998 Feb;113(4):447-455
references.pmid: 28308024