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A lakes trophic state index
can be determined by transparency, chlorophyll A or phosphorus
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For this study we used Secchi Depth Readings
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The formula above was
obtained from the Maine PEARL website
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the numbers were obtained from standards based on
mean secchi depths
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the Mean SD for Long Pond is 4.65
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Oligotrophic: 0-40
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Mesotrophic: 40-49
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Eutrophic: >50
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Under these determinations,
Long Pond is an oligotrophic lake though very close to being a mesotrophic
lake.
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Another notable point on
this slide is that in 1978, TSI was 33. This rise can probably be attributed to an increase in
algal productivity
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