{"refrec":{"BRefID":144342,"RR":"<b>Meesters, H.W.G.; ter Hofstede, R.; De Mesel, I.G.; Craeymeersch, J.A.; Deerenberg, C.; Reijnders, P.J.H.; Brasseur, S.M.J.M.; Fey, F.E.</b> (2009). De toestand van de zoute natuur in Nederland: vissen, benthos en zeezoogdieren. <i>Rapporten (Wettelijke Onderzoekstaken Natuur & Milieu)</i>, 97. Wettelijke Onderzoekstaken Natuur & Milieu: Wageningen.  97 pp.","BEntID":137475,"PublicFlag":1,"CheckedFlag":0,"wosflag":null,"vabbflag":null,"RefStringPartII":". <i>Rapporten (Wettelijke Onderzoekstaken Natuur & Milieu)</i>, 97. 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Since suitable historical reference values for fish and benthos (shellfish) species were unavailable, the average value over the first three years of the time series was used as a reference value. Since the time series do not all start from the same date, the reference values were not all based on thesame period. The combination of trends and quality assessments shows that many species are declining, although some species show disproportionate increases relative to the reference values, which may be related to climate change. 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