title: Bio-indicators and the quality of the Wadden Sea.
abstract: The definitions of the notions 'bio-indicator' and 'water quality' are critically reviewed; it is shown that both have been used ambiguously.The quality of the Wadden Sea is discussed using a number of indicators for pollution effects; the Wadden Sea is now an unsuitable environment for a number of marine mammals, and, to a lesser extent, for some bird species. It cannot be shown whether or not this pollution has any effect on r-selective species.
authors.affiliation: Netherlands Institute for Sea Research, P.O. Box 59, Texel, The Netherlands.
authors.forename: P
authors.initials: P
authors.lastname: De Wolf