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Nitrates/Nitrites: total nitrates measures the total
amounts of nitrates and nitrites in the water column
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-nitrogen enters lake
through decomposition of dead organisms -all forms of nitrogen can be
converted to nitrates and nitrites, the form available to plants
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sources: runoff,
fertilizers, manure,
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-levels higher than 0.2
ppm can cause algal blooms,
excess plant activity
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-although TMP was slightly
higher than surrounding Maine lakes, in sep still below the critical level,
but could still promote algal growth in the presence of sufficient
phosphorus
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Tom will now talk to you
about the most important nutrient for plant growth, and a very important
indicator of lake health-Phosphorus.
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