Macrophytes phosphorus

Benthic periphyton utilizes phosphorus from both soil and the water column, whereas floating periphyton receives phosphorus largely from the water column. Epiphytic periphyton receives phosphorus largely from the water column and phosphorus released from senescent macrophyte tissue. A small amount of phosphorus is also derived by epiphytic periphyton from living tissue of macrophytes. Chemical composition of periphyton varies depending on water column phosphorus, water flow, and type of macrophytes. Phosphorus content of periphyton is in the range of... 

Soley S (2010) Interaction between macrophytes and phytoplankton compartments for the uptake and decomposition of phosphorus compounds, the case of the Ebro river (NE Spain). Master thesis. University of Girona, Spain... 

Oligotrophic. Refers to waters low in nutrient loading with low primary production of organic material by algae and/or macrophytes. Growth in an oligotrophic water is often limited by low levels of phosphorus and nitrogen (see also eutrophic and mesotrophic). 

Burkholder, J.A. and Wetzel, R.G. (1990) Epiphytic alkaline phosphatase on natural and artificial plants in an oligotrophic lake re-evaluation of the role of macrophytes as a phosphorus source for epiphytes. Limnology and Oceanography 35, 736-747. 

This level of response has been driven by the recognition that high concentrations of phosphorus in aquatic environments can contribute to excessive algal and macrophyte growth and associated water-quality problems (Bostrom et ah, 1988 Cullen and Forsberg, 1988 Tyrrell, 1999). Organic phosphorus can comprise a large proportion of the total phosphorus in aquatic systems (Herbes et ah, 1975 McKelvie et al, 1995 ... 

Inositol phosphates The monoesters, comprising mostly IHPs account for approximately 50% of the TOP. In soil organic matter, a major portion of phosphorus is stored in phytin, which is the major source of IHPs. The hexaphosphate ester exists in macrophyte detrital tissnes, especially in grains as mixed Ca and Mg salts (Turner et al., 2002). 

Phosphorus uptake by macrophytes is maximum during the peak growing season, followed by a decrease or even cessation in the fall/winter. Typically, uptake rates of phosphorus by many... 

Moeller, R. E., J. M. Burkholder, and R. G. Wetzel. 1988. Significance of sedimentary phosphorus to a submersed freshwater macrophyte (Najas flexilis) and its algal epiphytes. Aquat. Bot. 32 261-281. 

Equation 14.39, the mass balance for phosphate (B), includes a term that takes into account phosphate production from organic phosphorus (O as a first-order mineralization reaction (third term) in which is the mineralization rate constant. Consumption is due to phytoplankton growth and uptake by macrophytes. 

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