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[email protected] Introduction Results Non-native species that are introduced through anthropogenic influences, Armored Rio Number of i.e. invasive species, cause harm to native systems in numerous ways and Invasive Species Occurrence Catfish Blue Common Grass Redbreast Grande Non-native Species account for billions of dollars in damages each year. Generally, invasive Waterbody Name Site ID spp. Tilapia Carp Carp Sunfish Cichlid Species Richness (S) • Invasive species present for at least one sampling event at 19 of 22 sites. Trinity River NRS18_TX_10002 - - 5 - - - 1 20 species have such high success in ecosystems through their ability to Neches River NRS18_TX_10003 - - - - 3 - 1 23 Frost Creek NRS18_TX_10004 - - - - 3 - 1 14 • Present in all HUC 02 regions & all major basins with revisit sites (Figure 1). South Fork San Gabriel RiverNRS18_TX_10005 - - - - 249 - 1 15 outcompete native species, spread and multiply rapidly, and adapt to a East Carancahua