Table 22.1
Summary of similarities and differences amon gmajor models
of secondary succession.
ModeltraitsRelayfloristicsInitialfloristiccomposi-tionNucleation Gradientin timeInteractioncategoriesVitalattributesResourceratioShadetoleranceHierarchicalframeworkSpatialNoNoExplicitImplicitNoImplicitNoNoImplicitPropaguleavailabilityNot con-sideredExplicitIndirect andpatchyExplicit butspeciesspecificExplicit butspeciesspecificExplicit butspeciesspecificNotconsideredNotconsideredExplicitInteractionsimportantYesNoYesSomewhat YesSomewhatYesYesVariesDominantinteractionsFacilitation NoneFacilitationFacilitation,inhibitionInhibitionNoneInhibitionInhibitionAllImportantlife-historytraitsShadetoleranceLongevity,growth rateEnvironmentalstresstoleranceLongevity,growthrateLongevity,stresstolerance,low resourcetoleranceDispersalability,longevity,timing ofreproductionLow resourcetoleranceShadetolerance,size,growthrate,longevityManyAnimal effects NoneNoneDispersersHerbivores,seedpredatorsNoneDispersersNoneNoneDispersers,herbivores,seedpredatorsInhibition byherbaceousspeciesNoNoNoYesUsuallyNoSometimesNoVariesRegionalrepeatabilityHighLowModerateModerate ModerateVariesHighModerateVariesNotes: Interactions are defined as either inhibition,tolerance, or facilitation. “Explicit” signifies thatthe trait was directly considered in the model. “Implicit”signifies that in thepresentation of the model the trait was important, even if not stated directly by the authors. “Varies” signifies that whether a trait is important for thatmodel is contingent on anumber of factors, thus no general statement canbe made.