= 3 Introductory material: Ecosim =
Ecosim provides a dynamic simulation capability at the ecosystem level, with key initial parameters inherited from the base Ecopath model.

This chapter contains details of the theory underpinning the function of Ecosim:

EwEugAnOverviewOfEcosim, EwEugEcosimBasics, EwEugVulnerabilitiesInEcosim, EwEugDealingWithDynamicInstabilityInEcosimEcospace, EwEugPredictingConsumption, EwEugForagingTimeAndPredationRisk, EwEugTimeSeriesFittingInEcosimEvaluatingFisheriesAndEnvironmentalEffects, EwEugHintsForFittingModelsToTimeSeriesReferenceData, EwEugEffectsOfPbZandVulnerabilityForTimeSeriesFitting, EwEugPredatorSatiationAndHandlingTimeEffects, EwEugModellingSwitchingBehaviourInEcosim, EwEugCompensatoryMechanisms, EwEugUsingEcosimToStudyCompensationInRecruitmentRelationships, EwEugCompensatoryGrowth, EwEugCompensatoryNaturalMortality, EwEugLinkingMediationAndTimeForcingFunctionsToTrophicInteractionRates, EwEugPrimaryProduction, EwEugNutrientCyclingAndNutrientLimitationInEcosim, EwEugDensityDependentChangesInCatchability, EwEugModellingEffortDynamics, EwEugUsingEcosimForStockReductionAnalysis, EwEugHatcheryPopulationsInEcosim, EwEugParameterSensitivity

See [[Using Ecosim. Part 1 Ecosim inputs.htm|Ecosim inputs]] and [[Using Ecosim. Part 2 Ecosim outputs.htm|Ecosim outputs]] for links to instructions for using Ecosim.