“…None of these include such prevalent and ecologically important groups as amphipods, isopods, free-living copepods, errant polychaetes, cheilostome bryozoans, ascidians, protozoans, macroalgae or phytoplankton, all of which taxa are well represented by "native" species inChesapeake Bay, and all of which groups are well recognized as including invading taxa in many estuaries t Data sources: Carlton 1979, Carlton et a!. 1990, Cohen and Carlton 1995 :j: Data sources: Light 1978, Silva 1979, Carlton 1979a, Siegfried et al 1980, Cloern eta!. 1985, Nichols and Thompson 1985, Hand and Ohlinger 1994, Cohen and Carlton 1995 around the world.…”