A process-basedmodelforerosionof Macoma balthica-affectedmudbeds

B.C. van Prooijen, F. Montserrat, P.M.J. Herman

    Research output: Contribution to journal/periodicalArticleScientificpeer-review

    3 Downloads (Pure)

    Abstract

    Modelingtheeffectofbiotaonsedimentdynamicsisadifficulttask.Inthispaperwere-analyze experimentalresultsof Willows etal.(1998) on theeffectsof Macoma balthica on sedimenterosion. A process-basedframeworkisproposed,fullycompatiblewithaphysicaldescriptionoferosionprocesses in caseofnobiogenicinfluences.Thebedisrepresentedbyaflufflayerontopofasubstrate.Acharacteristic featureoftheframeworkisthatthesedimentisrepresentedbyaprobabilitydensitydistributionforthe criticalshearstress,allowingforTypeIandTypeIIerosion. M. balthica increasesthesedimentmassinthe fluff layer.Thisincreaseisdeterminedbyconsideringtheactionradius,theoverlapoffeedingareas,and the feedingrateperanimal.Thecalibratedactionradiusandfeedingratewereintherangeasfoundinthe literature.Thedistributionofsedimentovertheerodibilityclassesandtheerosionrateparameterare hardly influencedatall.Duetooverlappingfeedingareas,theeffectisnon-linearwithdensityofthe animals.Themodelresultsareincloseagreementwiththemeasuredresults,suggestingthatnofurther formulationsofbiologicaleffectsareneededtosimulatetheexperimentsof Willows etal.(1998). In nature,othereffectslikedisruptingthebiofilmbygrazingcanbeofimportanceandshouldbeincludedin a laterstage.Thisstudyemphasizesthecrucialroleofsedimentavailabilityandtheeffectofbiotaonit. This aspectneedsmoreattentioninfutureexperiments.Theproposedmodelturnedouttoworkwellfor the effectsof M. balthica and offersopportunitiestoincludeotherbiogeniceffectsinaprocess-basedway as well.
    Original languageEnglish
    Pages (from-to)527-538
    JournalContinental Shelf Research
    Volume31
    Issue number6
    DOIs
    Publication statusPublished - 2011

    Fingerprint Dive into the research topics of 'A process-basedmodelforerosionof Macoma balthica-affectedmudbeds'. Together they form a unique fingerprint.

    Cite this