Report on Harmonisation of freshwater biological methods
Report on Harmonisation of freshwater biological methods
Report on Harmonisation of freshwater biological methods
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73. In preparati<strong>on</strong> <strong>of</strong> WFD implementati<strong>on</strong> a nati<strong>on</strong>al stream typology has beendeveloped. In additi<strong>on</strong>, a multimetric assessment method was completed, whichdetermines the <strong>biological</strong> water quality based <strong>on</strong> the effects <strong>of</strong> organic polluti<strong>on</strong>, toxicsubstances and morphological degradati<strong>on</strong>.Spain74. Within the Spanish project GUADALMED a method to assess the ecologicalstatus <strong>of</strong> streams and rivers in the Spanish Mediterranean area has been developed(ECOSTRIMED). The main objective <strong>of</strong> ECOSTRIMED is to provide an integratedquality assessment system for fluvial ecosystems. It includes the riparian habitat andthe <strong>biological</strong> quality <strong>of</strong> the water as the main parameters. Designed as a RapidBioassessment Protocol (RBP) it is performed directly in the field with a shortsampling time schedule.75. The ECOSTRIMED index is calculated by combining the values <strong>of</strong> two differentquality indices: 1) a <strong>biological</strong> index based <strong>on</strong> macroinvertebrates (FBILL orIBMWP), 2) a Riparian Habitat Quality Index (QBR). In accordance with therequirements <strong>of</strong> the WFD the result is presented in <strong>on</strong>e <strong>of</strong> five classes <strong>of</strong> ecologicalstatus.Sweden76. The Time Series as a comp<strong>on</strong>ent <strong>of</strong> the Swedish method Benthic Fauna in LakeLittorals and Running Water uses four selected indicator metrics <strong>of</strong> macroinvertebratediversity and distributi<strong>on</strong>: Shann<strong>on</strong>’s Diversity Index, ASPT Index, Danish StreamFauna Index and Acidity Index according to Hendiks<strong>on</strong> and Medin. This approachleads to an assessment <strong>of</strong> watercourses (riffle areas), resulting in <strong>on</strong>e <strong>of</strong> five c<strong>on</strong>diti<strong>on</strong>classes for each metric. The ratio between observed index value and expectedreference value is used to indicate the extent to which bottom fauna c<strong>on</strong>diti<strong>on</strong>s deviatefrom an undisturbed (natural) state.Switzerland77. Switzerland uses the comp<strong>on</strong>ent Benthos biology <strong>of</strong> the Methods for Investigati<strong>on</strong>and Assessment <strong>of</strong> running waters to evaluate <strong>biological</strong> watercourse quality. Themethod‘s objectives are to gain informati<strong>on</strong> <strong>on</strong> the occurrence <strong>of</strong> comm<strong>on</strong>macroinvertebrate taxa and to appraise and assess impacts <strong>on</strong> its compositi<strong>on</strong>.83