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As Kirsten mentioned
earlier in the presentation, phosphorus is the primary limiting nutrient in
freshwater ecosystems - primarily dependent on P to grow and small
concentration increases can trigger high increases in algal growth
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Go over phosphorus cycle: external
sources enter in runoff (some of which taken up by phytoplankton,
some complexes with ions and settles on bottom b/c in form not usable
by plants)
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also internal sources from breakdown
of dead organic matter
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And internal recycling
which occurs from low oxygen levels in hypolimnion: phosphorus that was in
sediment is released increasing P levels in hypolimnion - may not be issue
when lake stratified unless turbulence draws water to surface
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Mention critical levels
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