A new paradigm for biomonitoring: an example building on the Danish Stream Plant Index

Summary Despite intensive efforts for more than a decade to develop Water Framework‐compliant assessment systems, shortcomings continue to appear. In particular, the lack of reference conditions has hindered the development of assessment systems capturing the heart of the Water Framework Directive ( WFD ) – that ecological status should be set as the deviation from the natural, undisturbed condition. Recently, the Danish Stream Plant Index (...