Sammendrag
The WaterFrameworkDirectiveisthefirstinternationallegislationtorequireEuropeancountriesto
establish comparableecologicalassessmentschemesfortheirfreshwaters.Akeyelementinharmonising
quality classificationwithinandbetweenEurope’sriverbasinsisan“Intercalibration”exercise,stipulated
by theWFD,toensurethatthegoodstatusboundariesinallofthebiologicalassessmentmethodscorre-
spond tosimilarlevelsofanthropogenicpressure.Inthisarticle,weprovideacomprehensiveoverview
of thisinternationalcomparison,focusingontheassessmentschemesdevelopedforfreshwaterlakes.
Out of82lakeecologicalassessmentmethodsreportedforthecomparison,62weresuccessfullyinter-
calibrated andincludedintheECDecisiononintercalibration,withahighproportionofphytoplankton
(18), macrophyte(17)andbenthicfauna(13)assessmentmethods.Allthelakeassessmentmethodsare
reviewed inthisarticle,includingtheresultsofintercalibration.Furthermore,thecurrentgapsandway
forward toreachconsistentmanagementobjectivesforEuropeanlakesarediscussed.
© 2015TheAuthors.PublishedbyElsevierLtd.ThisisanopenaccessarticleundertheCCBY-NC-NDBenthic invertebrates
Ecological assessment
Europe
Fish fauna
Lakes
Macrophytes
Phytoplankton
Water FrameworkDirective
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