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1、ECOGRAPHY28:815/829,2005Minireviewsprovidesanopportunitytosummarizeexistingknowledgeofselectedecologicalareas,withspecialemphasisoncurrenttopicswhererapidandsignificantadvancesareoccurring.Reviewsshouldbeconciseandnottoowide-ranging.Allkeyreferencesshouldbecited.Asummaryis
2、required.Theconceptsofbias,precisionandaccuracy,andtheiruseintestingtheperformanceofspeciesrichnessestimators,withaliteraturereviewofestimatorperformanceBrunoA.WaltherandJoslinL.MooreWalther,B.A.andMoore,J.L.2005.Theconceptsofbias,precisionandaccuracy,andtheiruseintestingth
3、eperformanceofspeciesrichnessestimators,withaliteraturereviewofestimatorperformance/Ecography28:815/829.Thepurposeofthisreviewistoclarifytheconceptsofbias,precisionandaccuracyastheyarecommonlydefinedinthebiostatisticalliterature,withourfocusontheuseoftheseconceptsinquanti
4、tativelytestingtheperformanceofpointestimators(specificallyspeciesrichnessestimators).Wefirstdescribethegeneralconceptsunderlyingbias,precisionandaccuracy,andthendescribeanumberofcommonlyusedunscaledandscaledperformancemeasuresofbias,precisionandaccuracy(e.g.meanerror,varia
5、nce,standarddeviation,meansquareerror,rootmeansquareerror,meanabsoluteerror,andalltheirscaledcounterparts)whichmaybeusedtoevaluateestimatorperformance.Wealsoprovidemathematicalformulasandaworkedexampleformostperformancemeasures.Sinceeverymeasureofestimatorperformanceshouldb
6、eviewedassuggestive,notprescriptive,wealsomentionseveralotherperformancemeasuresthathavebeenusedbybiostatisticiansorecologists.Wethenoutlineseveralguidelinesofhowtotesttheperformanceofspeciesrichnessestimators:thedetaileddescriptionofdatasimulationmodelsandresamplingschemes
7、,theuseofrealandsimulateddatasetsonasmanydifferentestimatorsaspossible,mathematicalexpressionsforallestimatorsandperformancemeasures,andthepresentationofresultsforeachscaledperformancemeasureinnumericaltableswithincreasinglevelsofsamplingeffort.Wefinishwithaliteraturereview
8、ofpromisingnewresearchrelatedtospeciesrichnessestimation,andsummarizetheresultsof1
