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KRIS Humboldt Bay: Chart Page

Area Basin-wide/Regional
Topic Aquatic Insects: Percent Dominance All Humboldt Bay Locations 1994-98
Caption:  This chart shows the percentage of a sample that one species comprises, which is the Percent Dominance index, for all Humboldt Bay sampling locations in all years sampled. Harrington (1999) characterized healthy communities as having one species comprise no more than 14% of a sample. When samples have one species that comprises more than 39%, the community is impaired (Harrington, 1999). Data were collected by PALCO. See Info Links for more information on using aquatic insects as indicators.

To learn more about this topic click Info Links .
To view additional information (data source, aquisition date etc.) about this page, click Metadata .
To view the table with the chart's data, click Chart Table web page.
To download the table with the chart's data, click per_dom_hb_all_94_98.dbf (size 1,550 bytes)
To download the table with the chart's data as an Excel spreadsheet, click per_dom_hb_all_94_98.dbf.xls (size 5,632 bytes) .