| Area | Arroyo Corte Madera |
| Topic | Aquatic Insects: ACM Spring 2005, Richness |
| Caption: The number of discrete taxa found at sites within the Arroyo Corte Madera Creek Watershed ranged from 18 to 36, while the number of taxa within the families Ephemeroptera, Trichoptera or Plecoptera (EPT Taxa) ranged from 3 to 18. These measures of richness show similar patterns among the five sites, except that only 3 EPT Taxa were found at the lower Old Mill Creek site (ACMC4). Compared to a reference value of 12 for EPT Taxa (Harrington 1999), these data indicate impairment for all but the upper sites (ACM3 and ACM5). See Info Links for more information and Map to view the sampling locations. | |
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