Surface phosphatase activity of the moss Warnstorfia fluitans as an indicator of the nutrient status of an acidic stream

Phosphatase activities of the aquatic moss Warnstorfia fluitans (Hedw.) Loeske from an acidic stream in North-East England

“…As already reported (for 1999: Ellwood et al, 2002), there were no significant relationships between phosphatase activity of the field population and any of the measured ambient variables. If some feature of internal P content is the factor Values are mean ± SE; n = 3 involved in inducing synthesis of PMEase and PDEase, a close relationship might not be expected because activity would reflect aqueous P concentration over a period representing the response time of the moss to changing P status.…”

Aquatic plant nutrients, moss phosphatase activities and tissue composition in four upland streams in northern England

“…h À1 ). This suggests a possible difference in substrate affinity, as shown for Warnstorfia fluitans (Ellwood et al, 2002), where there was a higher affinity for MUP.…”

Importance of organic phosphate hydrolyzed in stalks of the lotic diatom Didymosphenia geminata and the possible impact of atmospheric and climatic changes

“…Such activity in aquatic phototrophs is usually induced under conditions of moderate P limitation and hence the rate of activity provides a measure of P limitation (Jansson et al, 1988;Christmas & Whitton, 1998a, b;Ellwood et al, 2002;Whitton et al 2005), though it may sometimes also reflect the fact that the only P source available is organic (Whitton et al, 1991;Ellwood & Whitton, 2007). It was therefore planned to compare changes in surface phosphatase activities of Didymosphenia in Stony Gill, North Yorkshire, during the main part of one growth season with concentrations of N and P fractions in the water.…”