EGU2015 -Phosphorus biogeochemistry session

EGU

BG1.9/SSS4.20 Insights into phosphorus biogeochemistry from soils and aquatic systems 

Phosphorus (P) is an essential element for all life and, under ambient conditions, is tightly cycled within the biosphere. However, human action has significantly altered the natural P cycle. Phosphate mining has depleted geological P reserves, while increased inputs of P to terrestrial ecosystems have enhanced fluxes of P to lakes and the oceans. On land, the soil system is a biogeochemical fulcrum, responding to the perturbed P cycle and ultimately determining the magnitude and timing of inorganic and organic P fluxes between terrestrial and aquatic ecosystems. Meanwhile in freshwater and marine aquatic environments, P inputs determine the trophic state of the ecosystem, while burial in sediments returns P to the geological sink. Throughout the P cycle, redox conditions play a key role in transformations and mobility of P.

This session investigates the P cycle in soil and aquatic systems across a range of scales. Contributions include:

• studies of soils and sediments on the pore and ped scales, including P speciation and the application of novel techniques to study P
• investigations of the redox chemistry of P in natural systems
• meta-analyses of input-cycling-export of P from soils at multiple scales
• phosphorus cycling in coastal seas, including its role in coastal eutrophication and burial in marine sediments
• global P cycling on geological timescales

European Geosciences Union General Assembly 2015, Vienna | Austria | 12 – 17 April 2015

   
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