Nutrient dynamics in freshwaters Chapter 13 (C) Chapter 14 (N, P) The greatest analgesic, soporific, stimulant, tranquilizer, narcotic, and to some extent even antibiotic -- in short, the closest thing to a genuine panacea -- known to medical science is work. -Thomas Szasz, author, professor of psychiatry (b. 1920)
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Nutrient dynamics in
freshwaters
Chapter 13 (C)
Chapter 14 (N, P)
The greatest analgesic, soporific, stimulant, tranquilizer, narcotic, and to some extent
even antibiotic -- in short, the closest thing to a genuine panacea -- known to medical
science is work. -Thomas Szasz, author, professor of psychiatry (b. 1920)
Today
Nutrients dynamics
Lab: move up the OM collection
Test 3 (Wed)
Next week
– Hydrology
– Lab: flow regime analysis
– EOW 17-18
Nutrient cycle: Terms
Flux vs. Compartments (source/sink)
Budget
Assimilation
Re-mineralization
Sequestration
Redox
– High (oxic)
– Low (reducing, e.g., methanogenesis CO2
CH4)
FIGURE 13.7
Diagram of a hypothetical nutrient cycle. This will be the general format used to represent nutrient cycles. Oxic
processes are above the center line and anoxic processes are below. Those that move on the center line are required,
independent of O2 concentration. Inorganic forms are listed from left to right, from reduced to oxidized. Thus,
transformations are generally occurring with potential energy if they move from left to right in the top half of the
diagram or from right to left in the bottom half of the diagram.