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FA229: A Beginner's Guide to Water Management—Common Aquatic Birds Using Florida Lakes

Figure 27. Mean abundance of birds (birds/km2) by lake trophic state for the 81 lakes in which measured lake surface area was available to calculate bird abundance (total bird counts divided by lake surface area).

Credit: Lake trophic state was determined using lake average chlorophyll values and the classification system of Forsberg and Ryding (1980).