Example of the lake history approach to terrestrial P cycling

Example of the lake history approach to terrestrial P cycling 

10 0 10 20 30 40 50 60 70 Jackson Pond P concentration Jackson Pond percentage Jackson Pond P fraction aocum-(jimol/g) of total P ulation rate (pmol cm- -kyH) 

These two examples suggest several controlling factors on P geochemical cycles. 

The lake sediment records presented here indicate a terrestrial P mass balance that is not near steady state on glacial/interglacial timescales, with important implications for the functioning of terrestrial and oceanic systems. Coupling these records of solid-phase P changes over time with oceanic records of dissolved inputs from rivers will eventually provide important constraints for the influence of climate on chemical weathering and the global P cycle. 

CONTROL OF OXYGEN ON COUPLED P AND C CYCLING IN CONTINENTAL MARGINS A CASE STUDY FROM THE ANOXIC SAANICH INLET 

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